Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74ABT245BNE4

Name: SN74ABT245BNE4
Brand: Texas Instruments
SKU: SN74ABT245BNE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74ABT245BNE4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-DIP (0.300", 7.62mm)

Datasheet:: SN74ABT245BNE4.pdf

Description:: IC TXRX NON-INVERT 5.5V 20DIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,246

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74ABT245BNE4 from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in industrial control and embedded systems. It supports hot insertion via Ioff and power-up 3-state logic, delivers ±32-mA high-drive outputs, operates at 4.5–5.5 V, and features low ground bounce (<1 V) at 5 V and 25°C.

For engineers reviewing the SN74ABT245BNE4 datasheet, SN74ABT245BNE4 pinout, SN74ABT245BNE4 application, or SN74ABT245BNE4 equivalent, key selection criteria include its 20-pin PDIP package, direction-control (DIR) and output-enable (OE) logic interface, latch-up immunity (>500 mA), and ESD robustness (2000-V HBM).

Technical Context

This device implements dual 8-bit bidirectional bus interface logic with independent DIR and OE controls. Its TTL-compatible inputs accept 0.8 V (VIL) and 2.0 V (VIH) thresholds, while outputs drive ±32 mA (IOH/IOL) under 4.5–5.5 V supply, enabling direct connection to legacy 5-V logic families without level-shifting.

The integrated Ioff circuit disables outputs when VCC = 0 V, preventing backflow current during hot insertion. Power-up 3-state ensures outputs remain high-impedance until VCC stabilizes, eliminating bus contention during system power sequencing.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	4.5–5.5 V - compatible with standard 5-V logic rails and tolerant of typical power rail ripple.
Output drive	−32 mA IOH / +64 mA IOL - sufficient to drive multiple TTL loads or long PCB traces without external buffers.
Propagation delay	0.8–3.9 ns - enables high-speed bus handshaking up to ~250 MHz in short-trace configurations.
Ground bounce (VOLP)	<1 V at VCC = 5 V, TA = 25°C - minimizes noise coupling into adjacent signals during simultaneous switching.
Latch-up immunity	>500 mA per JESD 17 - ensures robust operation in electrically noisy industrial environments.
ESD protection	2000-V HBM, 200-V MM - meets IEC 61000-4-2 Level 2 for handling and board-level transient immunity.
Operating temperature	−40°C to +85°C - qualified for commercial and extended industrial ambient conditions.

Pinout & Package

SN74ABT245BNE4 uses a 20-pin plastic dual in-line package (PDIP-N) with 0.3-inch body width and through-hole mounting. Pin 1 is located at the top-left corner with a notch or dot marking.

Pin/Terminal	Circuit Role	Design Meaning
1	A1	Input/output port A bit 1 - bidirectional data path connected to A-bus side.
2	A2	Input/output port A bit 2 - same electrical behavior as A1, part of 8-bit A group.
3	A3	Input/output port A bit 3 - shares common DIR/OE control with all A/B pins.
4	A4	Input/output port A bit 4 - no internal pull-up/down; requires external termination if unused.
5	A5	Input/output port A bit 5 - driven high-impedance when OE = high or VCC = 0 V (Ioff active).
6	A6	Input/output port A bit 6 - supports hot-swap isolation via Ioff and power-up 3-state.
7	A7	Input/output port A bit 7 - TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V).
8	A8	Input/output port A bit 8 - full 8-bit A-side data channel.
9	GND	Ground reference - must be connected to system common ground plane for signal integrity.
10	B1	Input/output port B bit 1 - bidirectional data path connected to B-bus side.
11	B2	Input/output port B bit 2 - mirrors A-side functionality with direction determined by DIR pin.
12	B3	Input/output port B bit 3 - isolated from A-side when OE = high.
13	B4	Input/output port B bit 4 - high-drive capability reduces need for external bus drivers.
14	B5	Input/output port B bit 5 - supports 3-state output disable for bus arbitration.
15	B6	Input/output port B bit 6 - compatible with 5-V CMOS and TTL logic families.
16	B7	Input/output port B bit 7 - no internal clamping diodes beyond specified VI/VO limits.
17	B8	Input/output port B bit 8 - completes 8-bit B-side data channel.
18	VCC	Positive supply - must be decoupled with ≥0.1 µF ceramic capacitor near pin.
19	DIR	Direction control - low = B→A transfer, high = A→B transfer; TTL-compatible input.
20	OE	Output enable - low = enabled, high = high-impedance; tie to VCC via pullup for safe power-up.

Key Features

Feature	Design Value
Ioff support	Enables hot insertion by disabling outputs when VCC = 0 V, preventing damaging backflow current.
Power-up 3-state	Guarantees high-impedance outputs during power ramp-up, eliminating bus conflicts before system initialization.
High-drive outputs	±32-mA IOH / +64-mA IOL drives heavy capacitive loads or multiple TTL inputs without buffering.
Low ground bounce	<1 V VOLP at 5 V ensures minimal noise injection into shared ground paths during fast switching.
Latch-up immunity	Exceeds 500 mA per JESD 17, supporting reliable operation in electrically harsh industrial settings.

Applications

Industrial PLC Backplane Interface	Legacy System Bus Bridge
Use Scenario: Interfacing microcontroller-based I/O modules to a 5-V parallel backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional data transceiver managing read/write cycles between CPU and peripheral cards using DIR-controlled flow. Use Value: High-drive outputs eliminate need for discrete buffer ICs; Ioff prevents damage during live card replacement.	Use Scenario: Connecting modern FPGA-based controllers to aging 5-V ISA or VMEbus peripherals. IC Role / Device Role / Timing Role: Level-agnostic bus translator enabling communication between new and legacy subsystems. Use Value: TTL-compatible thresholds and 3.9 ns max propagation delay preserve timing margins in mixed-generation designs.
Test Equipment Data Acquisition	Automated Manufacturing Fixture
Use Scenario: Routing sensor data from multiple analog front-ends to a central ADC controller in benchtop test gear. IC Role / Device Role / Timing Role: Isolating and multiplexing parallel data lines under software-controlled DIR/OE logic. Use Value: Low ground bounce maintains signal fidelity across 8-bit channels during high-speed sampling bursts.	Use Scenario: Controlling pneumatic valves and reading limit switches on production line fixtures via microcontroller GPIO expansion. IC Role / Device Role / Timing Role: Expanding microcontroller I/O count while maintaining deterministic bus access timing. Use Value: Latch-up immunity >500 mA protects against ESD events common in factory-floor electrostatic environments.

Industrial PLC Backplane Interface

Legacy System Bus Bridge

Use Scenario: Interfacing microcontroller-based I/O modules to a 5-V parallel backplane in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional data transceiver managing read/write cycles between CPU and peripheral cards using DIR-controlled flow.

Use Value: High-drive outputs eliminate need for discrete buffer ICs; Ioff prevents damage during live card replacement.

Use Scenario: Connecting modern FPGA-based controllers to aging 5-V ISA or VMEbus peripherals.

IC Role / Device Role / Timing Role: Level-agnostic bus translator enabling communication between new and legacy subsystems.

Use Value: TTL-compatible thresholds and 3.9 ns max propagation delay preserve timing margins in mixed-generation designs.

Test Equipment Data Acquisition

Automated Manufacturing Fixture

Use Scenario: Routing sensor data from multiple analog front-ends to a central ADC controller in benchtop test gear.

IC Role / Device Role / Timing Role: Isolating and multiplexing parallel data lines under software-controlled DIR/OE logic.

Use Value: Low ground bounce maintains signal fidelity across 8-bit channels during high-speed sampling bursts.

Use Scenario: Controlling pneumatic valves and reading limit switches on production line fixtures via microcontroller GPIO expansion.

IC Role / Device Role / Timing Role: Expanding microcontroller I/O count while maintaining deterministic bus access timing.

Use Value: Latch-up immunity >500 mA protects against ESD events common in factory-floor electrostatic environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ABT245BDW	SOIC-20 package (3.9 mm height), surface-mount, RoHS-compliant NIPDAU finish.	Requires PCB rework for SMT assembly; lacks through-hole mechanical retention.	Select when automated assembly and space-constrained layouts are prioritized over manual prototyping.
SN74ABT245BPWR	TSSOP-20 package (1.2 mm height), finer pitch (0.65 mm), higher thermal resistance (83°C/W).	Suitable for ultra-thin portable equipment but demands precise stencil design and reflow profiling.	Choose for compact consumer electronics where board thickness is critical and thermal load is moderate.

Compared with SN74ABT245BDW and SN74ABT245BPWR, SN74ABT245BNE4 offers through-hole mechanical stability and simplified hand-soldering for lab validation and low-volume industrial control panels, while retaining identical logic function, timing, and drive strength.

Availability

SN74ABT245BNE4 is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and legacy system upgrades requiring stable component supply and long-term obsolescence management.

Supply support for SN74ABT245BNE4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The SN74ABT245B family targets high-reliability 5-V bus interfacing in industrial control and instrumentation, emphasizing hot-swap capability, noise immunity, and compatibility with legacy TTL/CMOS systems.

FAQ

What is the maximum operating temperature range for SN74ABT245BNE4?

The SN74ABT245BNE4 is rated for operation from −40°C to +85°C, making it suitable for extended industrial environments including factory floors and outdoor control enclosures. This range is validated per the recommended operating conditions table in the official TI datasheet SCBS081L, and applies specifically to the PDIP-N package variant.

How does SN74ABT245BNE4 support hot insertion?

SN74ABT245BNE4 supports hot insertion through two integrated features: Ioff circuitry disables outputs when VCC = 0 V to prevent backflow current, and power-up 3-state holds outputs in high-impedance until VCC reaches valid logic levels. These functions are inherent to the SN74ABT245BNE4 silicon design and require no external components beyond a pullup resistor on OE.

What are the absolute maximum ratings for SN74ABT245BNE4 supply voltage?

The absolute maximum supply voltage for SN74ABT245BNE4 is −0.5 V to +7 V. Exceeding this range risks permanent damage. The device is fully specified for reliable operation only within the recommended 4.5–5.5 V range, and all timing and drive parameters assume VCC within that window.

Can SN74ABT245BNE4 drive multiple TTL loads directly?

Yes, SN74ABT245BNE4 can drive multiple standard TTL loads directly due to its high-output drive capability: −32 mA IOH and +64 mA IOL at VCC = 4.5 V. This exceeds the −1.6 mA / +40 mA requirements of standard TTL, allowing one SN74ABT245BNE4 output to interface with up to 20 standard TTL inputs without external buffering.

Is SN74ABT245BNE4 pin-compatible with other SN74ABT245B package variants?

Yes, SN74ABT245BNE4 is functionally and pinout-compatible with all SN74ABT245B variants (e.g., SN74ABT245BDW, SN74ABT245BPWR), sharing identical 20-pin assignment, logic behavior, and electrical specifications. Differences are limited to package type, thermal characteristics, and mounting method - not pin function or signal mapping.

SN74ABT245BNE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ABT

Package/Case:: 20-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Active

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 20-PDIP

SN74ABT245BNE4 FAQ

1.How can I place an order for SN74ABT245BNE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABT245BNE4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN74ABT245BNE4 reliable?

The price and inventory of SN74ABT245BNE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT245BNE4 is usually 5 days.

3.What payment methods are accepted for SN74ABT245BNE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT245BNE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ABT245BNE4?

SN74ABT245BNE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABT245BNE4 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN74ABT245BNE4?

For technical support, including SN74ABT245BNE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT245BNE4 requirements.

6.How does Aetrix verify that SN74ABT245BNE4 is sourced from the original manufacturer or authorized distributors?

All SN74ABT245BNE4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74ABT245BNE4 meets industry standards.

7.What is the process for return or replacement of SN74ABT245BNE4?

All SN74ABT245BNE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT245BNE4, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN74ABT245BNE4 part is unused and in its original packaging.

Return procedure for SN74ABT245BNE4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…