SN74ABT 5 V BiCMOS Bus Logic Variants

Texas Instruments SN74ABT devices are 5 V BiCMOS logic parts for high-drive buffers, transceivers, registers, and bus-interface functions in legacy and industrial digital systems.

Technology

Combines high drive with fast bus-interface behavior.

Function focus

Commonly used as buffers, transceivers, and registers.

Design concern

Enable/disable timing matters on shared buses.

High-drive 5 V bus logic for fast legacy interfaces

Compare SN74ABT variants by bus width, output-enable behavior, package, timing, and drive current.

The SN74ABT family from Texas Instruments is a 5 V Advanced BiCMOS logic line built around fast bus-interface functions. Many variants are buffers, transceivers, latches, registers, or wide 16-bit and 18-bit bus devices with 3-state outputs. Compared with simple gate families, SN74ABT parts are normally chosen for heavily loaded board-level buses, processor memory interfaces, backplanes, and legacy digital equipment where output drive and enable timing matter.

SN74ABT devices generally operate on 5 V rails and combine bipolar drive capability with CMOS-style control. Replacement decisions must consider input thresholds, bus-hold or output-enable behavior where present, output current, direction control, propagation delay, enable/disable timing, package pinout, and simultaneous switching noise. Octatronics groups these variants so engineers can separate true bus-interface options from smaller logic-gate families.

Key Features

High-drive bus logic for 5 V digital systems
Wide buffer and transceiver variants for shared data buses
Fast propagation and output-enable timing on many devices
Useful in industrial, telecom, computing, and test equipment
Requires careful review of loading and simultaneous switching behavior

Target Applications

Processor and memory bus buffering
Legacy industrial controller backplanes
Telecom and networking boards
Test-equipment digital interfaces
5 V parallel bus transceivers and registers

Ordering Variants

Compare 172 SN74ABT part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.

Part Number	Description	Package Type	Manufacturer	Lifecycle	RoHS	Availability	Action
SN74ABT162245DLR	Package: SSOP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Number of Channels: 16 \| Number of Outputs: 16 \| Number of Bits: 16 \| Logic Function: Transceiver, Inverting	SSOP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT16640DL	Package: SSOP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Number of Channels: 16 \| Number of Outputs: 16 \| Number of Bits: 16 \| Logic Function: Transceiver, Inverting	SSOP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT2241DW	Package: SOIC \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Number of Channels: 8 \| Number of Outputs: 8 \| Number of Bits: 8 \| Logic Function: Buffer, Inverting	SOIC	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT244AN	Package: PDIP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Number of Channels: 8 \| Number of Outputs: 8 \| Number of Bits: 8 \| Logic Function: Buffer, Inverting	PDIP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT374ADWRG4	Package: SOIC \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Outputs: 8 \| Number of Bits: 8 \| Frequency: 200MHz	SOIC	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT534APWR	Package: TSSOP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Outputs: 8 \| Number of Bits: 8 \| Frequency: 175MHz	TSSOP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT574AN	Package: PDIP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Outputs: 8 \| Number of Bits: 8 \| Frequency: 200MHz	PDIP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT574APWR	Package: TSSOP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Outputs: 8 \| Number of Bits: 8 \| Frequency: 150MHz	TSSOP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT273DW	Package: SOIC \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Bits: 8 \| Frequency: 150MHz \| Max Frequency: 150MHz	SOIC	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT273PWG4	Package: TSSOP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Bits: 8 \| Frequency: 150MHz \| Logic Function: D-Type	TSSOP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT273PWR	Package: TSSOP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Bits: 8 \| Frequency: 150MHz \| Logic Function: D-Type, Flip-Flop	TSSOP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT377AN	Package: DIP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Bits: 8 \| Frequency: 150MHz \| Logic Function: D-Type, Flip-Flop	DIP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT574ADW	Package: SOIC \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Outputs: 8 \| Number of Bits: 8 \| Frequency: 200MHz	SOIC	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT16373ADLR	Package: SSOP \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Channels: 16 \| Number of Outputs: 16 \| Number of Bits: 16	SSOP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT377ADWRG4	Package: SOIC \| Operating Supply Voltage: 5V \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Frequency: 150MHz \| Logic Function: D-Type \| Max Operating Temp: 85°C	SOIC	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT841ANSRE4	Package: SOP \| Max Supply Voltage: 5.5V \| Min Supply Voltage: 4.5V \| Output Current: 64mA \| Number of Outputs: 10 \| Number of Bits: 10 \| Logic Function: D-Type, Latch \| Max Operating Temp: 85°C	SOP	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT125DR	4-Ch 5V Buffer, 3-State SOIC, 4.6ns Delay	-	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT125DRG4	4-Bit 3-State Buffer IC, BICMOS, 4.6ns, SOIC, 5V	-	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT125NSR	4-Bit 3-State Buffer IC, 5V, SO, BICMOS, 4.6ns	-	Texas Instruments	Active	Compliant	In Stock	RFQ
SN74ABT125PWRE4	4-Bit 3-State Buffer IC, 5V, 4.6ns, TSSOP	-	Texas Instruments	Active	Compliant	In Stock	RFQ

Ordering Code Differences

How suffixes on SN74ABT map to package, grade, and reel options.

[{"code":"SN74ABT244 / 245 / 541","meaning":"Common 3-state bus buffer and transceiver functions."},{"code":"SN74ABT162xx / 168xx","meaning":"Wide 16-bit or 18-bit bus-interface variants for dense parallel data paths."},{"code":"D, DW, DB, DL, PW suffixes","meaning":"Package and packing identifiers such as SOIC, wide SOIC, SSOP, TVSOP, or TSSOP."},{"code":"Direction and OE pins","meaning":"Pin-compatible replacement requires matching DIR/OE polarity and timing."}]

How to Choose the Right SN74ABT Buffers, Drivers, Receivers and Transceivers

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Start with bus topology

Direction control, output enable polarity, and bit width are more important than family prefix alone.

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Check loading and drive

ABT parts can drive heavier loads, but edge rate and simultaneous switching noise should be reviewed.

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Verify package pinout

Wide bus packages may look similar while differing in pinout, byte lanes, or control pins.

Technical Specifications

Core parameters for SN74ABT product family

Logic family

ABT Advanced BiCMOS

Nominal supply

5 V class

Common functions

Buffers, drivers, latches, registers, bus transceivers

Common packages

SOIC, SSOP, TSSOP, PDIP, TVSOP

Selection focus

Bus width, direction, 3-state enable, drive current, timing

Source SN74ABT with Octatronics

Request stock confirmation, lead time, date code, and pricing for all 172 ordering variants from Texas Instruments. Our team supports active, EOL, and hard-to-find component sourcing.

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Frequently Asked Questions

Common technical questions about the SN74ABT product family.

What is SN74ABT used for?

SN74ABT is used for 5 V bus buffers, transceivers, registers, and high-drive parallel interface logic.

Can SN74ABT replace SN74ALS or SN74LS?

Only after checking input thresholds, output drive, timing, output-enable behavior, package pinout, and bus loading.

Why does output-enable timing matter?

On shared buses, two devices driving at the same time can cause contention. Enable and disable timing must match the bus protocol.

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