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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

Texas Instruments SN74ABT273PWRE4

Name: SN74ABT273PWRE4
Brand: Texas Instruments
SKU: SN74ABT273PWRE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ABT273PWRE4

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: SN74ABT273PWRE4.pdf

Description:: IC FF D-TYPE SNGL 8BIT 20TSSOP

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Product details

Overview

SN74ABT273PWRE4 from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with asynchronous clear, designed for high-speed synchronous logic in 5-V digital systems. It features 8-bit storage, ±32-mA/64-mA output drive, 150-MHz max clock frequency, and operates from –40°C to 85°C. It is used in buffer registers, shift registers, and pattern generators in industrial control and data acquisition systems.

For engineers reviewing the SN74ABT273PWRE4 datasheet, SN74ABT273PWRE4 pinout, SN74ABT273PWRE4 application, or SN74ABT273PWRE4 equivalent, key selection factors include its TSSOP-20 package, BiCMOS EPIC-II^B process for low ground bounce (<1 V), latch-up immunity (>500 mA), and compatibility with TTL-level inputs and outputs.

Technical Context

The SN74ABT273PWRE4 implements eight independent D-type latches synchronized to the rising edge of CLK, with a dedicated active-low CLR input that asynchronously resets all Q outputs to logic low. Its BiCMOS architecture enables fast propagation delays (t_PLH/t_PHL ≤ 6.5 ns at 5 V, CL = 50 pF) while maintaining robust noise margins and high current drive capability.

It operates strictly within 4.5 V–5.5 V supply range and requires setup (t_su = 2.5 ns) and hold (t_h = 1.2 ns) timing relative to CLK↑. Input transition rates are limited to 10 ns/V to ensure reliable sampling, and unused inputs must be tied high or low to prevent floating-induced instability.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Octal D-type flip-flop with asynchronous clear (CLR)
Supply Voltage	4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and CMOS systems
Max Clock Frequency	150 MHz - supports high-throughput data latching in real-time control loops
Output Drive	–32 mA (IOH), +64 mA (IOL) - drives heavy capacitive loads or multiple TTL inputs without buffering
Propagation Delay	t_PLH/t_PHL ≤ 6.5 ns (CLK to Q) - enables sub-7-ns timing-critical path closure
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded applications
Input Clamp Current	–18 mA - protects against negative transients on data or clock lines

Pinout & Package

TSSOP-20 (PW) package: 6.95 mm × 4.4 mm, 0.65 mm pitch, 1.2 mm max height, lead-free NiPdAu finish, RoHS-compliant, MSL Level-1 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1	CLR	Active-low asynchronous reset - forces all Q outputs low regardless of CLK state
2–9	1Q–8Q	Registered outputs - reflect sampled D-input values after CLK↑, retained until next clock or CLR
10	GND	Power return reference - must be low-impedance connection to minimize ground bounce
11–18	1D–8D	Data inputs - sampled on CLK↑ if setup/hold times met; no effect when CLK is static
19	VCC	Positive supply - decoupling capacitor (0.1 µF) required near pin for stable operation
20	CLK	Clock input - edge-sensitive; triggering occurs at ~1.5 V threshold, not dependent on slew rate

Key Features

Feature	Design Value
EPIC-II^B BiCMOS Process	Reduces dynamic power dissipation vs. pure bipolar while retaining high speed and drive strength
Low Ground Bounce (VOLP)	<1 V at VCC = 5 V - minimizes signal integrity risk in dense PCB layouts
Latch-Up Immunity	>500 mA per JEDEC JESD-17 - ensures robustness in noisy industrial environments
High-Drive Outputs	–32 mA / +64 mA - directly interfaces with multiple 74-series TTL loads or bus backplanes
Wide Operating Margin	VIH = 2 V, VIL = 0.8 V - compatible with both TTL and CMOS logic families at 5 V

Applications

Industrial PLC I/O Expansion	Test Equipment Pattern Generation
Use Scenario: Expanding digital input/output capacity in programmable logic controllers using parallel data buses. IC Role / Device Role / Timing Role: Acts as an 8-bit synchronous input latch and output register, synchronizing field signals to the controller's internal clock domain. Use Value: Enables deterministic sampling of sensor data and glitch-free actuator control via precise edge-triggered capture and buffered output drive.	Use Scenario: Generating repeatable stimulus waveforms in automated test equipment for IC validation. IC Role / Device Role / Timing Role: Functions as a programmable pattern register, storing and clocking out bit sequences under test controller direction. Use Value: Delivers stable, high-speed waveform edges (≤6.5 ns propagation) with strong drive to load test fixtures and device-under-test inputs.
Communications Backplane Buffering	Legacy System Data Acquisition Interface
Use Scenario: Isolating and driving parallel address/data lines between processor and peripheral modules on telecom backplanes. IC Role / Device Role / Timing Role: Serves as a bidirectional bus interface register, providing level-shifting and fanout amplification. Use Value: Supports 150-MHz operation and 64-mA sink current to maintain signal integrity across long traces and multiple loads.	Use Scenario: Capturing analog-to-digital converter outputs in legacy instrumentation where microcontroller GPIO is limited. IC Role / Device Role / Timing Role: Provides synchronized 8-bit parallel latch for ADC result capture on system clock edge. Use Value: Guarantees setup/hold compliance (2.5 ns / 1.2 ns) and eliminates metastability in slow-sampling, high-precision measurement paths.

Industrial PLC I/O Expansion

Test Equipment Pattern Generation

Use Scenario: Expanding digital input/output capacity in programmable logic controllers using parallel data buses.

IC Role / Device Role / Timing Role: Acts as an 8-bit synchronous input latch and output register, synchronizing field signals to the controller's internal clock domain.

Use Value: Enables deterministic sampling of sensor data and glitch-free actuator control via precise edge-triggered capture and buffered output drive.

Use Scenario: Generating repeatable stimulus waveforms in automated test equipment for IC validation.

IC Role / Device Role / Timing Role: Functions as a programmable pattern register, storing and clocking out bit sequences under test controller direction.

Use Value: Delivers stable, high-speed waveform edges (≤6.5 ns propagation) with strong drive to load test fixtures and device-under-test inputs.

Communications Backplane Buffering

Legacy System Data Acquisition Interface

Use Scenario: Isolating and driving parallel address/data lines between processor and peripheral modules on telecom backplanes.

IC Role / Device Role / Timing Role: Serves as a bidirectional bus interface register, providing level-shifting and fanout amplification.

Use Value: Supports 150-MHz operation and 64-mA sink current to maintain signal integrity across long traces and multiple loads.

Use Scenario: Capturing analog-to-digital converter outputs in legacy instrumentation where microcontroller GPIO is limited.

IC Role / Device Role / Timing Role: Provides synchronized 8-bit parallel latch for ADC result capture on system clock edge.

Use Value: Guarantees setup/hold compliance (2.5 ns / 1.2 ns) and eliminates metastability in slow-sampling, high-precision measurement paths.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-flip-flop applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT273PW	AC-family CMOS; lower drive (–24 mA / +24 mA); higher VIH (3.5 V min); 100-MHz max f_CLK	Better noise immunity but insufficient for driving >2 TTL loads or high-capacitance buses	Choose for low-power, noise-sensitive 5-V systems where speed <100 MHz suffices
SN74LS273N	LS-TTL; slower (30-MHz f_CLK); weaker drive (–0.4 mA / +8 mA); higher ICC (40 mA typical)	Compatible with legacy LS designs but lacks modern drive, speed, and latch-up robustness	Use only for drop-in replacement in existing LS-based boards with no timing or drive upgrades planned

Compared with SN74ACT273PW and SN74LS273N, the SN74ABT273PWRE4 delivers superior speed (150 MHz), stronger output drive (64 mA sink), and proven latch-up immunity (>500 mA), making it optimal for new industrial and test-equipment designs requiring robust 5-V synchronous logic.

Availability

SN74ABT273PWRE4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, test equipment pattern generation, and communications backplane buffering requiring stable component supply and long-term lifecycle support.

Supply support for SN74ABT273PWRE4 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 specializing in analog, embedded processing, and logic solutions, with decades of experience in high-reliability industrial and automotive ICs.

The SN74ABT273PWRE4 belongs to TI's ABT logic family, engineered for high-speed, high-drive 5-V digital interfacing in industrial automation, test instrumentation, and legacy-system upgrades.

FAQ

What is the maximum clock frequency supported by the SN74ABT273PWRE4?

The SN74ABT273PWRE4 supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C, CL = 50 pF). This rating is validated across the full industrial temperature range (–40°C to +85°C), making SN74ABT273PWRE4 suitable for high-throughput synchronous logic in real-time control applications.

Does the SN74ABT273PWRE4 require external pull-up or pull-down resistors on unused inputs?

Yes - per the datasheet, all unused inputs of the SN74ABT273PWRE4 must be held high or low to prevent floating. Floating inputs can cause increased ICC, erratic switching, or excessive power consumption due to internal input stage instability. Direct connection to VCC or GND is preferred over weak pull-ups/downs for reliability.

What is the purpose of the CLR pin on the SN74ABT273PWRE4, and how does it behave?

The CLR (clear) pin on the SN74ABT273PWRE4 is an active-low asynchronous reset that forces all eight Q outputs to logic low immediately, independent of the clock signal. When CLR is asserted (low), Q outputs go low within t_PHL(CLR→Q) ≤ 7.4 ns; release of CLR restores normal clocked operation on the next CLK↑ edge.

Can the SN74ABT273PWRE4 drive standard TTL loads directly?

Yes - the SN74ABT273PWRE4 provides ±32-mA/64-mA output drive, exceeding the requirements of standard TTL (which needs –0.4 mA for high, +16 mA for low). One SN74ABT273PWRE4 output can reliably drive up to four standard TTL inputs while maintaining valid VOH/VOL levels, eliminating the need for additional buffer stages in most 5-V systems.

Is the SN74ABT273PWRE4 RoHS compliant and lead-free?

Yes - the SN74ABT273PWRE4 uses NiPdAu lead finish and is RoHS compliant (per TI's packaging addendum). It has MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is qualified for peak reflow soldering up to 260°C, meeting IPC/JEDEC standards for lead-free assembly processes.

SN74ABT273PWRE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ABT

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Packaging:: Bulk

Product Status:: Active

Function:: Master Reset

Type:: D-Type

Output Type:: Non-Inverted

Number of Elements:: 1

Number of Bits per Element:: 8

Clock Frequency:: 150 MHz

Max Propagation Delay @ V, Max CL:: 6.8ns @ 5V, 50pF

Trigger Type:: Positive Edge

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

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Iq):: 400 µA

Input Capacitance:: 7 pF

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP

SN74ABT273PWRE4 FAQ

1.How can I place an order for SN74ABT273PWRE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABT273PWRE4 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 SN74ABT273PWRE4 reliable?

The price and inventory of SN74ABT273PWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT273PWRE4 is usually 5 days.

3.What payment methods are accepted for SN74ABT273PWRE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT273PWRE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ABT273PWRE4?

SN74ABT273PWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABT273PWRE4 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 SN74ABT273PWRE4?

For technical support, including SN74ABT273PWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT273PWRE4 requirements.

6.How does Aetrix verify that SN74ABT273PWRE4 is sourced from the original manufacturer or authorized distributors?

All SN74ABT273PWRE4 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 SN74ABT273PWRE4 meets industry standards.

7.What is the process for return or replacement of SN74ABT273PWRE4?

All SN74ABT273PWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT273PWRE4, 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 SN74ABT273PWRE4 part is unused and in its original packaging.

Return procedure for SN74ABT273PWRE4:

1.Submit a request within 90 days.

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

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