Please refer to the English Version as our Official Version.

Europe: France~~(Français)~~ Germany~~(Deutsch)~~ Italy~~(Italia)~~ Russian~~(русский)~~ Poland~~(polski)~~ Czech~~(Čeština)~~ Luxembourg~~(Lëtzebuergesch)~~ Netherlands~~(Nederland)~~ Iceland~~(íslenska)~~ Hungarian~~(Magyarország)~~ Spain~~(español)~~ Portugal~~(Português)~~ Turkey~~(Türk dili)~~ Bulgaria~~(Български език)~~ Ukraine~~(Україна)~~ Greece~~(Ελλάδα)~~ Israel~~(עִבְרִית)~~ Sweden~~(Svenska)~~ Finland~~(Svenska)~~ Finland~~(Suomi)~~ Romania~~(românesc)~~ Moldova~~(românesc)~~ Slovakia~~(Slovenská)~~ Denmark~~(Dansk)~~ Slovenia~~(Slovenija)~~ Slovenia~~(Hrvatska)~~ Croatia~~(Hrvatska)~~ Serbia~~(Hrvatska)~~ Montenegro~~(Hrvatska)~~ Bosnia and Herzegovina~~(Hrvatska)~~ Lithuania~~(lietuvių)~~ Spain~~(Português)~~ Switzerland~~(Deutsch)~~ United Kingdom~~(English)~~

Asia/Pacific: Japan~~(日本語)~~ Korea~~(한국의)~~ Thailand~~(ภาษาไทย)~~ Malaysia~~(Melayu)~~ Singapore~~(Melayu)~~ Vietnam~~(Tiếng Việt)~~ Philippines~~(Pilipino)~~

Africa, India and Middle East: United Arab Emirates~~(العربية)~~ Iran~~(فارسی)~~ Tajikistan~~(فارسی)~~ India~~(हिंदी)~~ Madagascar~~(malaɡasʲ)~~

South America / Oceania: New Zealand~~(Maori)~~ Brazil~~(Português)~~ Angola~~(Português)~~ Mozambique~~(Português)~~

North America: United States~~(English)~~ Canada~~(English)~~ Haiti~~(Ayiti)~~ Mexico~~(español)~~

Home Products Integrated Circuits (ICs)Data Acquisition - Digital Potentiometers~~CAT5138SDI-10GT3~~

Image may be representation.
See specifications for product details.

~~Favorite~~

EXPRESS OPTION

Payment method

CAT5138SDI-10GT3 - onsemi

Name: onsemi CAT5138SDI-10GT3
Brand: onsemi
SKU: CAT5138SDI-10GT3
Price: 0.44 USD
Availability: InStock
Rating: 5 (4 reviews)

Manufacturer Part Number: CAT5138SDI-10GT3

Manufacturer: onsemi

Allelco Part Number: 32D-CAT5138SDI-10GT3

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 19,720 pcs available, New & Original

Parts Description: IC DGTL POT 10KOHM 128TAP SC70-6

Package: SC-70-6

Data sheet: CAT5138SDI-10GT.pdf

Datasheets
Cylindrical Battery Holders.pdf

HTML Datasheet
Cylindrical Battery Holders.pdf

Environmental Information
Material Declaration CAT5138SDI-10GT3.pdf onsemi REACH.pdf onsemi RoHS.pdf

PCN Packaging
2.73KHz.pdf

RoHs Status: ROHS3 Compliant

~~Compare~~

Our certification

In stock: 19720

Unit Price: $0.702
Subtotal: $0.00

Want a better price?
Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity	Unit Price	Ext. Price
1+	$0.702	$0.70
10+	$0.595	$5.95
30+	$0.541	$16.23
100+	$0.488	$48.80
500+	$0.455	$227.50
1000+	$0.44	$440.00

The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

CAT5138SDI-10GT3 Tech Specifications
onsemi - CAT5138SDI-10GT3 technical specifications, attributes, parameters and parts with similar specifications to onsemi - CAT5138SDI-10GT3

Product Attribute	Attribute Value
Manufacturer	onsemi
Voltage - Supply	2.7V ~ 5.5V
Tolerance	±20%
Temperature Coefficient (Typ)	±300ppm/°C
Taper	Linear
Supplier Device Package	SC-70-6
Series	-
Resistance - Wiper (Ohms) (Typ)	85
Resistance (Ohms)	10k
Package / Case	6-TSSOP, SC-88, SOT-363

Product Attribute	Attribute Value
Package	Tape & Reel (TR)
Operating Temperature	-40°C ~ 85°C
Number of Taps	128
Number of Circuits	1
Mounting Type	Surface Mount
Memory Type	Volatile
Interface	I²C
Features	-
Configuration	Rheostat
Base Product Number	CAT5138

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0001

Parts Introduction

CAT5138SDI-10GT3 (1)

Manufacturer Part Number

CAT5138SDI-10GT3

Manufacturer

onsemi

Introduction

Digital Potentiometer for Precision Data Acquisition

Product Features and Performance

128 Taps for Fine Resolution

Linear Taper for Proportional Scaling

Single Rheostat Configuration

I2C Interface for Easy Communication

Volatile Memory for Temporary Setting Retention

Surface Mount Compatible for Compact PCB Designs

Product Advantages

Highly Linear Adjustment

Simple Electronic Control

Minimal Component Footprint

CAT5138SDI-10GT3 (2)

Key Technical Parameters

Resistance 10k Ohms

128 Position Adjustments

7V to 5.5V Supply Voltage

Temperature Coefficient ±300ppm/°C

Quality and Safety Features

Robust Operating Temperature Range -40°C to 85°C

±20% Resistance Tolerance

Reliable Surface Mount SC-70-6 Package

Compatibility

Compatible with Standard I2C Protocol

Suited for 6-TSSOP, SC-88, SOT-363 Case Footprints

Application Areas

Consumer Electronics

Industrial Controls

Communication Systems

Instrumentation

Product Lifecycle

Product Status Active

Not Indicated as Nearing Discontinuation

Several Key Reasons to Choose This Product

Precision Adjustment Capability

Compact SC-70-6 Package for Small Form Factor Applications

Durable Temperature Range for Versatile Use

Seamless Integration with I2C Bus System

Adequate Resistance Range for Various Circuits

Built by Renowned Semiconductor Manufacturer onsemi

Frequently Asked Questions(FAQ)

What are the key performance trade-offs when using the CAT5138SDI-10GT3 digital potentiometer in a low-voltage signal conditioning circuit operating near 2.7V?: The CAT5138SDI-10GT3 operates down to 2.7V, but at this lower end of its supply range, the effective resistance tolerance (±20%) and temperature coefficient (±300ppm/°C) become more pronounced relative to signal integrity. With only 128 taps, the step resolution is approximately 78.125Ω per increment, which may limit precision in fine-gain adjustments. Additionally, the typical 85Ω wiper resistance introduces non-negligible insertion loss in high-impedance nodes, particularly when used as a rheostat in feedback networks. Designers should validate signal-to-noise and distortion performance under worst-case voltage and temperature conditions to ensure acceptable linearity.

How does the volatile memory type of the CAT5138SDI-10GT3 affect system behavior during power cycling in embedded control applications?: Since the CAT5138SDI-10GT3 uses volatile memory, its wiper position resets to an undefined state upon power loss or brownout. This requires the host microcontroller to reinitialize the device via I2C after each power-up. In applications such as calibration or gain setting, failure to restore the correct tap position can lead to incorrect system behavior. Engineers must implement a startup routine that writes a known default value to the device, and consider pairing it with non-volatile logic or external EEPROM if persistent settings are required across power cycles.

Can the CAT5138SDI-10GT3 be used as a true two-terminal rheostat, and what limitations should be considered in high-current paths?: Yes, the CAT5138SDI-10GT3 supports rheostat configuration, but it is not rated for continuous high-current operation. The internal switch structure and SC-70-6 package limit safe current handling to low-level signals—typically under 1mA for reliable long-term operation. Exceeding this can cause localized heating, resistance drift, or permanent damage due to electromigration. For higher current applications, it should be used in conjunction with a buffer amplifier or external pass element, with the potentiometer serving only as a control reference.

What I2C timing and addressing considerations apply when integrating the CAT5138SDI-10GT3 into a multi-device bus with other onsemi components?: The CAT5138SDI-10GT3 uses a standard I2C interface with a fixed device address determined by hardware pins, allowing up to two devices on the same bus. When coexisting with other I2C peripherals, care must be taken to avoid address conflicts—especially with other onsemi digital potentiometers that may share similar addressing schemes. The maximum SCL clock frequency is 400kHz (Fast Mode), so bus capacitance and pull-up resistor selection must ensure rise times meet I2C specifications. Additionally, the device does not support clock stretching, so the master must manage timing compliance during multi-byte writes.

How does the ±300ppm/°C temperature coefficient of the CAT5138SDI-10GT3 impact resistance stability in industrial temperature environments?: Over the full operating range of -40°C to 85°C, the resistance of the CAT5138SDI-10GT3 can drift by up to ±1.95% due to its ±300ppm/°C coefficient. For a 10kΩ nominal resistance, this translates to a potential variation of nearly ±195Ω from cold to hot conditions. In precision applications such as sensor linearization or reference voltage division, this drift may exceed acceptable error margins. Designers should either restrict the operating temperature range, implement periodic recalibration, or select a component with tighter tempco if stability is critical.

Is the CAT5138SDI-10GT3 suitable for replacing a mechanical potentiometer in a user-adjustable audio volume control, and what design modifications are necessary?: The CAT5138SDI-10GT3 can replace a mechanical pot in low-power audio applications, but several factors must be addressed. Its linear taper matches typical volume control curves, but the 128-tap resolution may produce audible stepping in quiet passages. The wiper resistance (85Ω typical) can interact with amplifier input impedance, potentially causing frequency response anomalies. To mitigate this, a buffer stage is recommended between the wiper and the next gain stage. Additionally, since the device is volatile, a microcontroller must manage user input (e.g., rotary encoder) and update the I2C setting accordingly—adding firmware complexity compared to a passive component.

How does the SC-70-6 package of the CAT5138SDI-10GT3 influence PCB layout and thermal management in densely populated designs?: The SC-70-6 (SOT-363) package is extremely compact at approximately 2.0mm x 1.25mm, making the CAT5138SDI-10GT3 suitable for space-constrained layouts. However, its small thermal mass limits heat dissipation, so prolonged operation near maximum voltage or current should be avoided. Thermal vias under the pad are not applicable due to the package style, so reliance on copper pour connections for heat spreading is limited. In high-density designs, ensure adequate clearance for automated assembly and inspect solder joints carefully, as the fine pitch increases risk of bridging during reflow.

What are the reliability implications of the MSL 1 rating for the CAT5138SDI-10GT3 in high-volume manufacturing environments?: With an MSL 1 (Unlimited) rating, the CAT5138SDI-10GT3 can be exposed to ambient conditions indefinitely without requiring dry packing or bake-out procedures prior to reflow. This simplifies logistics and reduces handling costs in high-volume production. However, despite the robust moisture resistance, standard ESD precautions still apply during assembly due to the CMOS-based I2C interface. The RoHS3 compliance and REACH unaffected status further support global manufacturing compliance without additional material screening.

How does the 128-tap resolution of the CAT5138SDI-10GT3 compare to similar digital potentiometers with 256 taps in terms of gain control granularity?: The CAT5138SDI-10GT3 offers 128 taps, providing 7-bit resolution, whereas 256-tap devices offer 8-bit control. In a 10kΩ configuration, this means each step changes resistance by ~78Ω compared to ~39Ω for a 256-tap version. For applications requiring fine gain or offset adjustments—such as instrumentation amplifiers—the coarser step size may result in perceptible quantization in output response. However, for coarse tuning or setpoint calibration where absolute precision is less critical, the 128-tap version reduces cost and complexity while still offering adequate control.

Can the CAT5138SDI-10GT3 be daisy-chained with other I2C digital potentiometers to create a multi-channel control system?: The CAT5138SDI-10GT3 does not support hardware daisy-chaining in the traditional sense, as it lacks a data-out or pass-through pin. However, multiple devices can coexist on the same I2C bus if their addresses are uniquely configured via the address pins. This allows up to two CAT5138SDI-10GT3 units to be controlled independently from a single master. For systems requiring more than two channels, a multiplexer or a different device with expanded addressing would be necessary. Each device must still comply with total bus capacitance and timing constraints.

What precautions are necessary when using the CAT5138SDI-10GT3 in a mixed-signal environment with high-speed digital lines nearby?: Although the CAT5138SDI-10GT3 operates at low analog voltages, its I2C interface is susceptible to noise coupling from adjacent high-speed digital traces. To maintain signal integrity, route SDA and SCL lines away from clock or switching signals, and use ground guards if necessary. The analog nodes (terminal A, B, and W) should be kept short and shielded from digital return paths to prevent crosstalk. Additionally, decoupling the VDD pin with a 0.1µF ceramic capacitor close to the package minimizes supply-induced noise, especially during I2C transactions.

How does the linear taper of the CAT5138SDI-10GT3 affect its suitability for logarithmic audio applications compared to a logarithmic digital pot?: The CAT5138SDI-10GT3 features a linear taper, meaning resistance changes uniformly with each tap increment. In audio volume control, human perception of loudness is logarithmic, so a linear pot requires software compensation to achieve perceptually smooth volume transitions. This means the microcontroller must map user input to non-linear tap positions, increasing firmware complexity. A true logarithmic digital pot would provide more natural response without software intervention, but the CAT5138SDI-10GT3 remains viable in applications where digital correction is acceptable or where linear control is preferred (e.g., sensor scaling).

What is the significance of the 85Ω typical wiper resistance in the CAT5138SDI-10GT3 when used in a voltage divider configuration?: The 85Ω wiper resistance of the CAT5138SDI-10GT3 is in series with the lower leg of the voltage divider when configured as a potentiometer. This introduces a small but measurable error in the output voltage, especially when the wiper is near the ground terminal. For example, at tap position 1, the effective resistance to ground includes the wiper resistance, slightly lowering the expected voltage. In high-precision references, this can be compensated in software or avoided by using the device in rheostat mode with an external fixed resistor. Designers should model this effect in SPICE simulations for accurate results.

How does the ±20% resistance tolerance of the CAT5138SDI-10GT3 influence calibration requirements in production testing?: The ±20% tolerance on the end-to-end resistance (10kΩ) means actual values can range from 8kΩ to 12kΩ. In applications such as precision voltage division or feedback networks, this variation may exceed system error budgets. As a result, end-product calibration may be necessary—either by measuring the actual resistance and adjusting firmware setpoints, or by selecting tighter-tolerance components. For non-critical applications like bias setting or coarse tuning, the tolerance may be acceptable without calibration, reducing test time and cost.

Can the CAT5138SDI-10GT3 operate reliably in automotive environments despite not being AEC-Q100 qualified?: While the CAT5138SDI-10GT3 supports an industrial temperature range (-40°C to 85°C), it lacks AEC-Q100 qualification, which includes rigorous stress testing for automotive reliability. Its use in under-hood or safety-critical automotive systems is not recommended. However, in cabin electronics with controlled environments—such as infotainment or lighting control—where temperature and vibration stresses are lower, it may be acceptable with thorough design validation. Always consult onsemi’s application notes and perform HALT testing if deploying in vehicle applications.

What advantages does the I2C interface of the CAT5138SDI-10GT3 offer over SPI-based digital potentiometers in microcontroller-limited designs?: The I2C interface of the CAT5138SDI-10GT3 requires only two GPIO pins (SDA and SCL), making it ideal for microcontrollers with limited I/O. Unlike SPI, which typically needs four lines (MOSI, MISO, SCLK, CS), I2C allows multiple peripherals to share the same bus with minimal pin overhead. This is particularly beneficial in compact embedded systems where every pin counts. Additionally, I2C’s open-drain structure simplifies level shifting in mixed-voltage designs, though it trades off speed—SPI can offer faster updates, which may matter in dynamic control loops.

How should the CAT5138SDI-10GT3 be handled during PCB rework to avoid damage from electrostatic discharge?: The CAT5138SDI-10GT3, like all CMOS-based devices, is sensitive to ESD. During rework, use grounded soldering irons, anti-static mats, and wrist straps. The SC-70-6 package has small pads that are prone to lifting if excessive heat is applied—limit soldering temperature to 350°C maximum and use fine-tip irons with controlled dwell time. Avoid probing the I2C lines with ungrounded oscilloscope tips, as this can introduce transient voltages. If possible, power down the system before rework and discharge any stored energy in nearby capacitors.

In what scenarios would the CAT5138SDI-10GT3 be preferred over a digital potentiometer with non-volatile memory?: The CAT5138SDI-10GT3 is advantageous in applications where cost, power, and simplicity outweigh the need for persistent settings. Its volatile memory consumes no standby power for data retention, and it avoids the write-cycle limitations of EEPROM-based pots. It is well-suited for dynamic control systems—such as real-time feedback tuning or test equipment—where the host continuously updates the setting and power cycling is infrequent. In contrast, non-volatile pots are better for user-configurable devices that must retain settings after shutdown, but they typically cost more and have slower write times.

Parts with Similar Specifications

The three parts on the right have similar specifications to onsemi CAT5138SDI-10GT3

Product Attribute
Part Number	CAT5137SDI-10GT3	CAT5136SDI-50GT3	CAT5137SDI-00GT3	CAT5133ZI-10-GT3
Manufacturer	onsemi	onsemi	onsemi	onsemi
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Series	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Resistance (Ohms)	-	-	-	-
Temperature Coefficient (Typ)	-	-	-	-
Taper	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Resistance - Wiper (Ohms) (Typ)	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Interface	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Features	-	-	-	Simultaneous Sampling
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Tolerance	-	-	-	-
Voltage - Supply	-	-	-	-
Number of Circuits	-	-	-	-
Memory Type	-	-	-	-
Number of Taps	-	-	-	-
Configuration	-	-	-	S/H-ADC

CAT5138SDI-10GT3 Datasheet PDF

Download CAT5138SDI-10GT3 pdf datasheets and onsemi documentation for CAT5138SDI-10GT3 - onsemi.

Datasheets: Cylindrical Battery Holders.pdf
HTML Datasheet: Cylindrical Battery Holders.pdf
Environmental Information: Material Declaration CAT5138SDI-10GT3.pdf onsemi REACH.pdf onsemi RoHS.pdf
PCN Packaging: 2.73KHz.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Nord***mbedded

Jul 20, 2026

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.
Arch***ct

Jul 15, 2026

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.
FPGA***lorer88

Jul 7, 2026

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.
Nath***oleman

Jun 29, 2026

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.
Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

Use your express account for shipment if you have one.
Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

QC (Quality Warranty)
Payment Support
Packaging
Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.

Strict quality inspection builds a solid foundation for electronic component quality.

Visual inspection
Performance testing and reliability verification
Standardized full-process testing
Precise control of every parameter

We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.

Quality Inspection

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner

Efficient Supply Management
Cost-Saving Procurement
Fast Sourcing & Delivery

Contact us if you have any questions.

Phone: +00852 9146 4856
Email: info@allelco.com

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

SMTA
IPC
ESD
PSMA