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HomeProductsIntegrated Circuits (ICs)Interface - Drivers, Receivers, TransceiversSN75ALS197DR
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SN75ALS197DR - Texas Instruments

Manufacturer Part Number
SN75ALS197DR
Manufacturer
Texas Instruments
Allelco Part Number
32D-SN75ALS197DR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
23,217 pcs available, New & Original
Parts Description
IC RECEIVER 0/4 16SOIC
Package
16-SOIC
Data sheet
SN75ALS197DR.pdf

PCN Design/Specification

Mult Devices Font 21/Apr/2018.pdf

HTML Datasheet

SN75ALS197 Datasheet.pdf
RoHs Status
ROHS3 Compliant
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Specifications

SN75ALS197DR Tech Specifications
Texas Instruments - SN75ALS197DR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - SN75ALS197DR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply 4.75V ~ 5.25V
Type Receiver
Supplier Device Package 16-SOIC
Series -
Receiver Hysteresis 120 mV
Protocol -
Package / Case 16-SOIC (0.154", 3.90mm Width)
Product Attribute Attribute Value
Package Tape & Reel (TR)
Operating Temperature 0°C ~ 70°C
Number of Drivers/Receivers 0/4
Mounting Type Surface Mount
Duplex -
Data Rate -
Base Product Number 75ALS197

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

SN75ALS197DR Image
SN75ALS197DR (1)

Manufacturer Part Number

SN75ALS197DR

Manufacturer

Texas Instruments

Introduction

Interface receiver for serial communication applications

Product Features and Performance

Quadruple differential line receiver

Designed for balanced and unbalanced digital data transmission

120 mV receiver hysteresis for noise rejection

Supports multipoint bus transmission

Product Advantages

High input impedance

Low power consumption

Designed for sign-off and regulatory compliance

Key Technical Parameters

Receivers: 4

Voltage - Supply: 4.75V ~ 5.25V

Operating Temperature: 0°C ~ 70°C

Mounting Type: Surface Mount

Package / Case: 16-SOIC

Hysteresis: 120 mV

Quality and Safety Features

Industry-standard 16-SOIC package ensures reliability

Compliance with RoHS and other regulatory standards

Compatibility

Compatible with various bus standards

Integrates smoothly with microcontrollers and digital logic

Application Areas

Telecommunications

Networking

Data acquisition systems

Industrial control

Product Lifecycle

Active product, currently not near discontinuation

Replacements and upgrades might be available if offered by Texas Instruments

Several Key Reasons to Choose This Product

Robust design suited for harsh environments

Low propagation delay

Reliable performance from a trusted manufacturer

Optimized for high-data-integrity applications

Ease of integration into various system designs

Frequently Asked Questions(FAQ)

What are the key design considerations when using the SN75ALS197DR in a 5V industrial control interface application?
The SN75ALS197DR operates within a supply voltage range of 4.75V to 5.25V, making it suitable for standard 5V TTL/CMOS systems common in industrial environments. Its receiver hysteresis of 120 mV provides noise immunity against signal fluctuations typical in electrically noisy control cabinets. However, designers should ensure input signals remain within the valid logic thresholds under all operating conditions—especially near the edges of the supply range—to maintain reliable state detection. The 0°C to 70°C operating temperature range limits deployment in outdoor or high-ambient-temperature enclosures without additional thermal management.
How does the lack of driver channels in the SN75ALS197DR influence system architecture compared to transceiver-based solutions?
The SN75ALS197DR is a receiver-only device (0 drivers, 4 receivers), which means it cannot transmit signals back to the source. This necessitates pairing it with a separate driver IC if bidirectional communication is required, increasing component count and PCB complexity. However, this separation allows for optimized receiver performance and reduced crosstalk in receive-heavy applications such as sensor monitoring or status feedback systems where transmission capability is unnecessary.
Can the SN75ALS197DR be used in RS-485 networks despite not being labeled as an RS-485 receiver?
While the SN75ALS197DR is not protocol-specific and lacks the differential input structure required for true RS-485 compliance, its high input impedance and hysteresis make it potentially usable for single-ended signal conditioning in low-speed, short-distance point-to-point links. However, it does not meet RS-485 electrical specifications for differential voltage thresholds or common-mode range, so it should not be deployed in multidrop or electrically harsh environments without significant signal conditioning and risk of noncompliance.
What layout practices are critical when placing the SN75ALS197DR on a densely populated 16-SOIC footprint?
The 16-SOIC package (3.90mm width) requires careful attention to thermal and signal integrity. Since MSL 1 allows unlimited floor life, moisture-related delamination is not a concern, but thermal dissipation through the PCB is passive—ensure adequate copper pour under the device if operating near maximum ambient temperature. Keep input traces short and away from high-speed digital lines to preserve the effectiveness of the 120 mV hysteresis. Ground return paths should be low-impedance, especially given the lack of on-chip ESD protection beyond basic handling levels.
How does receiver hysteresis of 120 mV in the SN75ALS197DR compare to similar quad receiver ICs in noisy environments?
A hysteresis of 120 mV is relatively high for a TTL-compatible receiver, offering better noise margin than devices with 50–80 mV thresholds, such as some 74HC-series equivalents. This makes the SN75ALS197DR more resilient to ground bounce and slow signal edges in industrial settings. However, it may require slightly cleaner input signal conditioning than Schmitt-trigger inputs with higher hysteresis (e.g., 200 mV), and input rise/fall times should remain reasonably fast to avoid metastability during threshold crossing.
Is the SN75ALS197DR suitable for battery-powered systems given its supply voltage requirements?
The minimum supply voltage of 4.75V rules out direct use with 3.3V or lower battery systems without regulation. Even a fresh 5V lithium battery may drop below this threshold under load, risking unreliable operation. A regulated 5V supply is recommended, which increases system complexity and quiescent current draw—making the SN75ALS197DR less ideal for ultra-low-power applications compared to 3.3V-compatible alternatives, despite its otherwise robust input characteristics.
What are the implications of the SN75ALS197DR’s surface-mount packaging for high-volume manufacturing?
The 16-SOIC package is compatible with standard SMT assembly processes and pick-and-place equipment, supporting cost-effective high-volume production. Its tape-and-reel packaging (TR) enables automated handling, reducing labor costs and placement errors. However, the 0.154" lead pitch demands accurate solder paste stencil design and reflow profiling to avoid bridging, particularly in mixed-technology boards with through-hole components nearby.
How should input overvoltage conditions be handled when interfacing the SN75ALS197DR with higher-voltage logic families?
The SN75ALS197DR is not rated for input voltages exceeding VCC + 0.5V. When interfacing with 12V or higher logic levels—common in legacy industrial systems—series current-limiting resistors and clamping diodes must be used to prevent damage. A typical approach includes a 1kΩ resistor in series with each input and a Schottky diode to VCC, ensuring input transients do not exceed absolute maximum ratings even during hot-plug events.
Why might a designer choose the SN75ALS197DR over a modern low-voltage equivalent despite its 5V-only operation?
The SN75ALS197DR offers proven reliability in legacy 5V systems and exhibits consistent hysteresis behavior across its operating range, which can simplify validation in safety-critical or long-lifecycle designs. Its radiation-tolerant process heritage (common in older TI ALS-series devices) may also provide marginal advantages in environments with elevated electromagnetic interference, though this is not formally specified. For retrofits or drop-in replacements, its electrical compatibility often outweighs the benefits of migrating to newer, lower-voltage alternatives.
What test conditions should be applied during qualification of the SN75ALS197DR in a new design?
During design validation, test the SN75ALS197DR across the full supply range (4.75V to 5.25V) and temperature range (0°C to 70°C) with slowly ramping input signals to verify hysteresis window consistency. Inject controlled noise (e.g., 100 mVpp at 1 MHz) on input lines to assess immunity. Also validate propagation delay skew between the four receiver channels under load, as mismatches can affect timing in parallel sensing applications.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments SN75ALS197DR

Product Attribute SN75ALS197DRG4 SN75ALS194DR SN75ALS199DR SN75ALS197NSR
Part Number SN75ALS197DRG4 SN75ALS194DR SN75ALS199DR SN75ALS197NSR
Manufacturer Luminary Micro / Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Type - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Receiver Hysteresis - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Duplex - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Protocol - - - -
Series - - - -
Data Rate - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Supply - - - -
Number of Drivers/Receivers - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad

SN75ALS197DR Datasheet PDF

Download SN75ALS197DR pdf datasheets and Texas Instruments documentation for SN75ALS197DR - Texas Instruments.

PCN Design/Specification
Mult Devices Font 21/Apr/2018.pdf
HTML Datasheet
SN75ALS197 Datasheet.pdf

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Customer Reviews

Evaluation: 10 Articles

  • 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.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
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.
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SN75ALS197DR Image

SN75ALS197DR

Texas Instruments
32D-SN75ALS197DR

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