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

Texas Instruments SN74AC534PW

Name: SN74AC534PW
Brand: Texas Instruments
SKU: SN74AC534PW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74AC534PW

Manufacturer:: Texas Instruments

Category:: Flip Flops

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

Datasheet:: SN74AC534PW.pdf

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

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Product details

Overview

SN74AC534PW from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state inverting outputs, designed for bus interface and register applications. It operates across 2V–6V V_CC, delivers ≤11ns propagation delay at 5V, supports 150MHz clock frequency, and features input tolerance up to 6V - enabling direct interfacing with mixed-voltage systems in industrial I/O port designs.

For engineers reviewing the SN74AC534PW datasheet, SN74AC534PW pinout, SN74AC534PW application, or SN74AC534PW equivalent, key selection criteria include its 20-pin TSSOP package, 3-state output control via OE, guaranteed timing margins (t_su = 3.5ns, t_h = 1ns at 5V), and compatibility with capacitive bus loads up to 50pF.

Technical Context

This device implements eight independent D-type latches triggered on the rising edge of CLK, with each Q output inverted relative to its D input. Internal logic ensures synchronous data capture and deterministic state retention during clock transitions.

The buffered OE input enables high-impedance output states without affecting internal flip-flop operation - allowing concurrent data loading or retention while bus lines are isolated. Output drive strength is specified at ±24mA (V_CC = 4.5–5.5V), supporting direct connection to standard TTL/CMOS buses.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2V to 6V - supports single-supply operation across 3.3V and 5V logic domains without level shifters
Max Propagation Delay (t_pd)	11ns at V_CC = 5V - enables reliable operation in high-speed digital control paths up to 150MHz
Output Drive (I_OL/I_OH)	±24mA at V_CC = 5.5V - sufficient to drive 50pF bus capacitance with controlled edge rates
Input Voltage Tolerance	Inputs accept up to 6V regardless of V_CC - allows safe interfacing with higher-voltage peripherals
Operating Temperature	−40°C to +85°C - qualified for industrial ambient environments without derating
Power Dissipation Capacitance (C_pd)	40pF at 5V - enables accurate dynamic power estimation in clocked register applications

Pinout & Package

TSSOP-20 (PW) package: 6.50mm × 6.4mm body size, 1.2mm max height, 0.65mm lead pitch, gull-wing leads, pin 1 index area marked.

Pin/Terminal	Circuit Role	Design Meaning
1 (OE)	Output Enable (active-low)	Assert low to enable 3-state inverting outputs; high-Z state isolates bus without affecting internal latch state
2–9, 12, 15–19 (1Q–8Q)	Inverting outputs	Each Q = NOT(D) after CLK↑; outputs drive bus directly with ±24mA capability
3–4, 7–8, 13–14, 17–18 (1D–8D)	Data inputs	Edge-triggered sampling points; accept 0–6V regardless of V_CC level
11 (CLK)	Clock input	Rising-edge sensitive; minimum pulse width 3.5ns at 5V for guaranteed setup/hold compliance
10 (GND)	Ground reference	Return path for all signals and power; requires local 0.1µF bypass capacitor
20 (V_CC)	Supply voltage	Primary power rail; must be decoupled within 5mm of pin per TI layout guidelines

Key Features

Feature	Design Value
Wide V_CC range (2V–6V)	Eliminates need for separate voltage translators when interfacing 3.3V controllers with 5V peripherals
3-state inverting outputs	Enables bidirectional bus arbitration without external inverters or pull-ups
Input overvoltage tolerance (to 6V)	Prevents damage or latch-up when connected to legacy 5V logic driving into 3.3V systems
Low propagation delay (11ns @ 5V)	Supports tight timing budgets in real-time I/O expansion modules and programmable logic interfaces
High noise immunity (Δt/Δv = 8 ns/V)	Reduces susceptibility to crosstalk-induced glitches on shared PCB traces

Applications

Industrial PLC I/O Expansion	Automotive Body Control Module
Use Scenario: Adding parallel digital input/output capability to a microcontroller-based controller with limited GPIO. IC Role / Device Role / Timing Role: Acts as an octal buffer register with synchronized sampling and bus-isolation control. Use Value: Enables 8-bit parallel data capture or output under precise clock control, with OE-driven bus contention avoidance during mode switching.	Use Scenario: Interfacing a 3.3V MCU to legacy 5V sensor/actuator networks in vehicle door modules. IC Role / Device Role / Timing Role: Serves as a level-tolerant, 3-state D-flip-flop for synchronized signal conditioning and bus multiplexing. Use Value: Accepts 5V sensor inputs safely while driving 3.3V-compatible loads, with timing margins verified down to −40°C.
Test Equipment Digital Pattern Generator	Medical Diagnostic Data Acquisition
Use Scenario: Generating precise, synchronized digital stimulus waveforms for IC functional testing. IC Role / Device Role / Timing Role: Provides edge-aligned, glitch-free 8-bit pattern latching with sub-4ns setup time at 5V. Use Value: Delivers deterministic timing behavior critical for boundary-scan and JTAG test vector generation.	Use Scenario: Capturing parallel ADC output streams in portable ultrasound front-ends where space and power are constrained. IC Role / Device Role / Timing Role: Functions as a low-power, high-reliability register stage between analog-to-digital conversion and serial interface buffering. Use Value: Achieves <40µA quiescent current at 5.5V while maintaining 150MHz clock capability for real-time waveform digitization.

Industrial PLC I/O Expansion

Automotive Body Control Module

Use Scenario: Adding parallel digital input/output capability to a microcontroller-based controller with limited GPIO.

IC Role / Device Role / Timing Role: Acts as an octal buffer register with synchronized sampling and bus-isolation control.

Use Value: Enables 8-bit parallel data capture or output under precise clock control, with OE-driven bus contention avoidance during mode switching.

Use Scenario: Interfacing a 3.3V MCU to legacy 5V sensor/actuator networks in vehicle door modules.

IC Role / Device Role / Timing Role: Serves as a level-tolerant, 3-state D-flip-flop for synchronized signal conditioning and bus multiplexing.

Use Value: Accepts 5V sensor inputs safely while driving 3.3V-compatible loads, with timing margins verified down to −40°C.

Test Equipment Digital Pattern Generator

Medical Diagnostic Data Acquisition

Use Scenario: Generating precise, synchronized digital stimulus waveforms for IC functional testing.

IC Role / Device Role / Timing Role: Provides edge-aligned, glitch-free 8-bit pattern latching with sub-4ns setup time at 5V.

Use Value: Delivers deterministic timing behavior critical for boundary-scan and JTAG test vector generation.

Use Scenario: Capturing parallel ADC output streams in portable ultrasound front-ends where space and power are constrained.

IC Role / Device Role / Timing Role: Functions as a low-power, high-reliability register stage between analog-to-digital conversion and serial interface buffering.

Use Value: Achieves <40µA quiescent current at 5.5V while maintaining 150MHz clock capability for real-time waveform digitization.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state output applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC534APW	Lower V_CC range (1.65V–3.6V); 3.3V-only operation; 6.7ns t_pd at 3.3V	Optimized for modern low-voltage FPGA/CPU I/O; not suitable for 5V bus interfacing	Select when system uses only 3.3V logic and requires faster timing than SN74AC534PW
SN74ACT534PW	Higher drive (±24mA at 3.3V); TTL-compatible input thresholds; identical pinout and AC specs	Better noise margin in electrically noisy industrial environments; same thermal profile	Choose for legacy 5V systems requiring tighter VIH/VIL margins and robust EMI immunity

Compared with SN74LVC534APW and SN74ACT534PW, the SN74AC534PW uniquely balances 2V–6V supply flexibility, 6V-tolerant inputs, and proven industrial temperature reliability - making it the preferred choice for mixed-voltage board-level integration where voltage translation must be avoided.

Availability

SN74AC534PW is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, test equipment digital pattern generation, and medical diagnostic data acquisition requiring stable component supply across extended temperature ranges.

Supply support for SN74AC534PW 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 over 50 years of innovation in industrial-grade IC design.

The SN74AC534PW belongs to the AC-series advanced CMOS logic family, engineered for high-speed, low-power, mixed-voltage digital interfacing in harsh industrial and automotive environments.

FAQ

What is the maximum clock frequency supported by SN74AC534PW at 5V?

The SN74AC534PW supports a maximum clock frequency of 150MHz at V_CC = 5V ± 0.5V under recommended operating conditions. This is validated by timing requirements specifying minimum CLK pulse width of 3.5ns and setup/hold times of 3.5ns/1ns respectively - ensuring reliable edge-triggered operation in high-speed register applications.

Does SN74AC534PW require external pull-up resistors on the OE pin?

Yes, to ensure the outputs remain in high-impedance state during power-up or power-down, SN74AC534PW OE should be tied to V_CC through a pull-up resistor. The minimum resistance value depends on the current-sinking capability of the driving source, but TI recommends values that maintain OE > 2.0V during startup transients to prevent bus contention.

Can SN74AC534PW safely interface a 3.3V microcontroller with a 5V peripheral bus?

Yes, SN74AC534PW can safely interface a 3.3V microcontroller with a 5V peripheral bus. Its inputs tolerate up to 6V regardless of V_CC, and its 3-state outputs drive 5V-tolerant loads when V_CC = 5V. When powered at 3.3V, outputs swing rail-to-rail (0–3.3V), so external level-shifting may be needed for 5V-receiving devices unless they are 3.3V-input-tolerant.

What is the thermal resistance (R_θJA) of SN74AC534PW in its TSSOP package?

The junction-to-ambient thermal resistance (R_θJA) of SN74AC534PW in the PW (TSSOP-20) package is 83°C/W, as specified in the Thermal Information table. This value assumes standard JEDEC 2-layer board conditions and guides thermal design for continuous operation at full output drive within the −40°C to +85°C ambient range.

Is SN74AC534PW pin-compatible with other members of the SN74AC534 family?

Yes, SN74AC534PW is functionally and pin-compatible with all other SN74AC534 variants (e.g., DB, DW, NS, N packages). All share identical pin configuration, electrical characteristics, and timing behavior - differing only in mechanical packaging dimensions and thermal performance. The PW variant uses the same 20-pin layout with pin 1 index in the top-left corner.

SN74AC534PW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AC

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

Packaging:: Bulk

Product Status:: Obsolete

Function:: Standard

Type:: D-Type

Output Type:: Tri-State, Inverted

Number of Elements:: 1

Number of Bits per Element:: 8

Clock Frequency:: 150 MHz

Max Propagation Delay @ V, Max CL:: 10.5ns @ 5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 2V ~ 6V

Current - Quiescent (Iq):: 4 µA

Input Capacitance:: 4.5 pF

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP

SN74AC534PW FAQ

1.How can I place an order for SN74AC534PW through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74AC534PW 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 SN74AC534PW reliable?

The price and inventory of SN74AC534PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC534PW is usually 5 days.

3.What payment methods are accepted for SN74AC534PW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC534PW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74AC534PW?

SN74AC534PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74AC534PW 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 SN74AC534PW?

For technical support, including SN74AC534PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC534PW requirements.

6.How does Aetrix verify that SN74AC534PW is sourced from the original manufacturer or authorized distributors?

All SN74AC534PW 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 SN74AC534PW meets industry standards.

7.What is the process for return or replacement of SN74AC534PW?

All SN74AC534PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC534PW, 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 SN74AC534PW part is unused and in its original packaging.

Return procedure for SN74AC534PW:

1.Submit a request within 90 days.

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

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