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Home Products Integrated Circuits (ICs)Logic - Buffers, Drivers, Receivers, Transceivers~~SN74LVC245APWRG4~~

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SN74LVC245APWRG4 - Texas Instruments

Name: Texas Instruments SN74LVC245APWRG4
Brand: Texas Instruments
SKU: SN74LVC245APWRG4
Availability: InStock
Rating: 5 (3 reviews)

Manufacturer Part Number: SN74LVC245APWRG4

Manufacturer: Texas Instruments

Allelco Part Number: 32D-SN74LVC245APWRG4

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 7,810 pcs available, New & Original

Parts Description: IC TXRX NON-INVERT 3.6V 20TSSOP

Package: 20-TSSOP

Data sheet: SN74LVC245APWRG.pdf

Datasheets
Logic Guide.pdf SN74LVC245A.pdf

PCN Design/Specification
Design 22/Feb/2022.pdf

PCN Packaging
Reel 10/Jul/2018.pdf

HTML Datasheet
SN74LVC245A.pdf

RoHs Status: ROHS3 Compliant

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In stock: 7810

Specifications

SN74LVC245APWRG4 Tech Specifications
Texas Instruments - SN74LVC245APWRG4 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - SN74LVC245APWRG4

Product Attribute	Attribute Value
Manufacturer	Texas Instruments
Voltage - Supply	1.65V ~ 3.6V
Supplier Device Package	20-TSSOP
Series	74LVC
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Package	Tape & Reel (TR)
Output Type	3-State
Operating Temperature	-40°C ~ 125°C (TA)

Product Attribute	Attribute Value
Number of Elements	1
Number of Bits per Element	8
Mounting Type	Surface Mount
Logic Type	Transceiver, Non-Inverting
Input Type	-
Current - Output High, Low	24mA, 24mA
Base Product Number	74LVC245

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

SN74LVC245APWRG4 (1)

Manufacturer Part Number

SN74LVC245APWRG4

Manufacturer

Texas Instruments

Introduction

The SN74LVC245APWRG4 is a logic transceiver component from Texas Instruments, capable of bidirectional data transmission with non-inverting logic.

Product Features and Performance

Non-Inverting 8-Bit Logic Transceiver

Operates from 1.65V to 3.6V

Supports up to 24mA output drive strength

Compatible with down-voltage systems

3-State outputs for bus interfacing

Product Advantages

Supports high-speed data transfer with low power consumption

Superior signal integrity due to integrated bus hold circuitry

Provides design flexibility with bidirectional data paths

Key Technical Parameters

Logic Type: Transceiver, Non-Inverting

Number of Elements: 1

Number of Bits per Element: 8

Current - Output High, Low: 24mA each

Voltage - Supply: 1.65V to 3.6V

Operating Temperature Range: -40°C to 125°C

Quality and Safety Features

Extended industrial temperature range

Robust electrostatic discharge (ESD) protection

Compatibility

Compatible with multiple bus standards due to 5V tolerant inputs

Mounting Type: Surface Mount

TSSOP-20 package for standard PCB manufacturing

Application Areas

Data communication systems

Data bus bridges

Switching networks

Embedded systems

Signal buffering and distribution

Product Lifecycle

Product is discontinued at Digi-Key

Potential need to source alternative components or consult manufacturer for replacement models

Several Key Reasons to Choose This Product

Robust operating temperature suitable for industrial applications

Solid performance for both 3.3V and 5V systems

Supports live insertion and withdrawal without power interruption

Enhanced data transmission reliability with bus hold feature

Energy-efficient device suitable for power-sensitive designs

Frequently Asked Questions(FAQ)

How does the SN74LVC245APWRG4 support level shifting between a 1.8V microcontroller and a 3.3V peripheral bus?: The SN74LVC245APWRG4 operates across a supply voltage range of 1.65V to 3.6V, allowing its inputs to accept logic levels from a 1.8V domain while its outputs drive a 3.3V bus. Its input thresholds are compatible with lower-voltage logic families, enabling reliable translation without additional level-shifting circuitry. When powered at 3.3V, the device interprets 1.8V input signals as valid logic highs due to its Vil and Vih specifications being scaled relative to VCC, making it suitable for interfacing modern low-voltage processors with legacy or higher-voltage peripherals.

What are the key trade-offs when using the SN74LVC245APWRG4 in a high-speed parallel data transfer application compared to the SN74LVCH245APWR?: While both devices offer 8-bit bidirectional translation, the SN74LVC245APWRG4 has a slightly higher propagation delay (typically 5.5 ns at 3.3V vs. 4.8 ns for the LVCH variant) and lacks the bus-hold feature present in the LVCH series. This makes the SN74LVC245APWRG4 more dependent on external pull-up or pull-down resistors to maintain state during tri-stated conditions, increasing design complexity in floating-bus scenarios. However, it consumes less quiescent current under light loading, which may be preferable in power-sensitive systems.

Can the SN74LVC245APWRG4 safely drive 5V TTL inputs when operated at 3.3V VCC?: Yes, the SN74LVC245APWRG4 outputs remain within safe voltage limits for 5V TTL inputs when powered at 3.3V. Its output high voltage (VOH) typically reaches 3.2V at 24mA load under 3.3V supply, which exceeds the 2.0V minimum VIH requirement of standard 5V TTL. However, the reverse direction—applying 5V signals to inputs while the device is powered at 3.3V—is not recommended unless the DIR or OE pins are properly managed, as input overvoltage may exceed absolute maximum ratings without series current-limiting resistors.

How does the output drive capability of the SN74LVC245APWRG4 influence fan-out in a multi-drop memory interface?: With ±24mA output drive at 3.3V, the SN74LVC245APWRG4 can source or sink sufficient current to drive multiple CMOS inputs across a moderate-length backplane. In a typical 3.3V CMOS system with 4mA input current per load, the device can support up to six standard loads while maintaining valid logic levels. However, trace capacitance and rise-time degradation must be considered; for longer buses, series termination or buffer segmentation may be required to preserve signal integrity at frequencies above 50 MHz.

What thermal considerations apply when using the SN74LVC245APWRG4 in an industrial environment operating at 125°C ambient?: The SN74LVC245APWRG4 is rated for operation up to 125°C junction temperature, but power dissipation must be carefully evaluated under worst-case conditions. At full 24mA output loading on all eight channels with a 3.6V supply, total power can approach 700mW, leading to significant self-heating in the 20-TSSOP package. Thermal resistance (θJA) of approximately 90°C/W implies a temperature rise of ~63°C above ambient at this load, potentially exceeding the limit. Derating output current or improving PCB copper pour for heat spreading is essential in high-temperature deployments.

Why might a designer choose the SN74LVC245APWRG4 over the MC74LCX245DTG in a battery-powered embedded system?: The SN74LVC245APWRG4 offers lower quiescent current (typically 10µA at 3.3V) compared to the MC74LCX245DTG (typically 20µA), resulting in reduced standby power consumption—critical for long-life battery applications. Additionally, the LVC family provides better input voltage tolerance and more consistent propagation delay across the full 1.65V to 3.6V range, ensuring reliable operation as battery voltage decays. The MC74LCX245DTG, while faster at higher voltages, exhibits increased delay variation near its lower supply threshold.

How should the direction control (DIR) and output enable (OE) pins be managed to prevent bus contention during power-up sequencing?: To avoid unintended bus drive during power-up, the OE pin of the SN74LVC245APWRG4 should be held high (inactive) through a pull-up resistor until VCC stabilizes and the microcontroller can assert valid control signals. If the DIR pin is toggled before OE is deasserted, transient current paths may form between conflicting drivers. A power-good signal or RC delay circuit on OE ensures the outputs remain tri-stated during initialization, minimizing inrush current and protecting connected devices.

What layout practices are recommended for the SN74LVC245APWRG4 in a 20-TSSOP package to maintain signal integrity on an 8-bit data bus?: The 20-TSSOP package of the SN74LVC245APWRG4 has a 0.65mm pitch, requiring careful PCB routing to avoid crosstalk and impedance mismatches. Data lines should be length-matched within ±50 mils to minimize skew, and adjacent signal traces should maintain at least 3× trace width spacing. Ground planes beneath the device improve thermal performance and reduce loop inductance. Decoupling capacitors (100nF ceramic) must be placed within 2mm of the VCC pin, with a secondary 10µF bulk capacitor nearby to handle transient current demands during simultaneous switching.

Does the SN74LVC245APWRG4 support hot-swapping or live insertion into a backplane?: The SN74LVC245APWRG4 lacks built-in hot-swap protection features such as slew rate control or integrated ESD clamps beyond standard I/O protection. While its 3-state outputs allow disconnection from the bus when OE is high, inserting or removing a board with active signals can induce latch-up or transient overvoltage. For hot-swap applications, external current-limiting resistors (22–100Ω in series with I/O lines) and TVS diodes are recommended to protect the device and ensure compliance with IEC 61000-4-2 standards.

How does the moisture sensitivity level (MSL 1) of the SN74LVC245APWRG4 affect manufacturing and storage processes?: Rated MSL 1 (unlimited floor life), the SN74LVC245APWRG4 can be exposed to ambient factory conditions indefinitely without requiring dry packing or baking before reflow. This simplifies logistics and reduces handling costs compared to higher MSL-rated components. However, standard ESD precautions still apply during assembly, and prolonged exposure to high humidity should be avoided to prevent oxidation of exposed leads, which could affect solderability in wave or selective soldering processes.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments SN74LVC245APWRG4

Product Attribute
Part Number	SN74LVC245APWG4	SN74LVC245APWRE4	SN74LVC245APWRG3	SN74LVC245APWRG3-J
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Voltage - Supply	-	-	-	-
Input Type	-	-	-	Differential
Logic Type	-	-	-	-
Output Type	-	Current - Unbuffered	Voltage - Buffered	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Number of Elements	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Series	-	-	-	-
Number of Bits per Element	-	-	-	-
Current - Output High, Low	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)

SN74LVC245APWRG4 Datasheet PDF

Download SN74LVC245APWRG4 pdf datasheets and Texas Instruments documentation for SN74LVC245APWRG4 - Texas Instruments.

Datasheets: Logic Guide.pdf SN74LVC245A.pdf
PCN Design/Specification: Design 22/Feb/2022.pdf
PCN Packaging: Reel 10/Jul/2018.pdf
HTML Datasheet: SN74LVC245A.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
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.
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