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Texas Instruments SN74ABT534DWR
- Part No.:
- SN74ABT534DWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SN74ABT534DWR.pdf
- Description:
- BUS DRIVER, ABT SERIES, 8-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
SN74ABT534DWR from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs in a 20-pin SOIC (DW) package. It features +5 V operation, 125 MHz clock frequency, 1.6 ns data setup time, –32 mA high-level and 64 mA low-level output drive, and operates from –40°C to 85°C. It serves as a bus-interface register in high-speed digital systems requiring bidirectional data latching and bus contention control.
For engineers reviewing the SN74ABT534DWR datasheet, SN74ABT534DWR pinout, SN74ABT534DWR application, or SN74ABT534DWR equivalent, key selection considerations include its 3-state output enable timing (tPZH/tPLZ < 5.2 ns), latch-up immunity (>500 mA), output ground bounce (<1 V), and compatibility with TTL- and CMOS-level logic interfaces in industrial and computing bus architectures.
Technical Context
This device implements eight independent positive-edge-triggered D-type flip-flops, each with complementary Q outputs not provided - only true Q outputs are available. The buffered OE input controls all eight outputs simultaneously into high-impedance state without affecting internal storage, enabling seamless bus sharing without external pull-ups or interface logic.
Its EPIC-IIB BiCMOS process delivers high-drive capability while maintaining low static current (ICC ≤ 30 mA active, ≤250 µA disabled) and robust ESD protection (>2 kV HBM, >200 V machine model). Timing is characterized at VCC = 5 V, CL = 50 pF, with propagation delays tPLH/tPHL ≤ 6.7 ns and enable/disable times tPZH/tPLZ ≤ 5.8 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal positive-edge-triggered D-type flip-flop with 3-state outputs |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS systems |
| Max Clock Frequency | 125 MHz - supports high-speed synchronous bus operation up to 125 million transitions/sec |
| Output Drive | –32 mA IOH / 64 mA IOL - drives heavy capacitive loads (e.g., >50 pF traces or multiple inputs) without signal degradation |
| Setup/Hold Time | tsu = 1.6 ns, th = 2 ns - enables reliable sampling of fast data streams with minimal timing margin |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments |
| Package | SOIC-20 (DW) - surface-mount, 7.5 mm × 12.8 mm footprint, RoHS-compliant, tape-and-reel (2000 pcs/reel) |
Pinout & Package
SN74ABT534DWR uses a 20-pin SOIC (DW) package per JEDEC MS-013, with 0.300-inch body width and 1.27 mm lead pitch. Pin 1 is located at the top-left corner marked by a beveled edge or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control: pulls all Q outputs to high-impedance when high; no effect on internal flip-flop state |
| 2–9 | D1–D8 | Data inputs synchronized to CLK↑; each feeds one D-type latch |
| 11 | CLK | Global positive-edge clock input; triggers simultaneous capture of all eight D inputs |
| 12–19 | Q1–Q8 | True (non-inverted) registered outputs; each enabled/disabled via OE |
| 10 | GND | Ground reference for logic and output drivers |
| 20 | VCC | +5 V supply for core logic and high-drive output stage |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive 3-State Outputs | –32 mA IOH / 64 mA IOL enables direct connection to loaded backplanes or multi-drop buses without buffers |
| Low Output Ground Bounce | VOLP < 1 V at VCC = 5 V ensures signal integrity during simultaneous output switching |
| Latch-Up Immunity | Exceeds 500 mA per JESD-17 - prevents destructive latch-up under transient overcurrent conditions |
| Robust ESD Protection | >2000 V HBM and >200 V machine model - reduces handling sensitivity and field failure risk |
| BiCMOS Process (EPIC-IIB) | Combines bipolar speed and CMOS low power - achieves 125 MHz operation with ICC ≤ 30 mA active |
Applications
| Industrial Bus Interface | Computing I/O Expansion |
|---|---|
Use Scenario: Isolating microcontroller GPIO banks from noisy PLC backplane wiring while maintaining deterministic timing. IC Role / Device Role / Timing Role: Acts as a synchronized, 3-state output buffer registering parallel data before transmission onto shared RS-485 or CAN controller peripheral buses. Use Value: Eliminates need for discrete level shifters or bus transceivers due to TTL-compatible thresholds and 64 mA sink capability driving long traces. | Use Scenario: Adding parallel port functionality to an x86 SBC via ISA or LPC bus extension. IC Role / Device Role / Timing Role: Functions as an octal latch/register providing edge-aligned data capture and tri-state isolation between CPU address/data bus and peripheral peripherals. Use Value: Enables clean bus arbitration with sub-2 ns setup/hold margins and <5.8 ns OE-to-output disable delay, preventing bus contention glitches. |
| Test Equipment Data Capture | Legacy System Emulation |
Use Scenario: Capturing 8-bit parallel sensor outputs (e.g., ADC or encoder) synchronized to a system master clock in automated test fixtures. IC Role / Device Role / Timing Role: Provides precise, clock-edge-aligned sampling of asynchronous analog front-end signals prior to digitization or FIFO buffering. Use Value: Achieves jitter-free sampling with 1.6 ns data setup window and 125 MHz clock tolerance - critical for high-accuracy waveform reconstruction. | Use Scenario: Replacing obsolete 74LS374 in retro-computing hardware restoration where PCB layout cannot be modified. IC Role / Device Role / Timing Role: Serves as drop-in functional replacement with identical pinout, same 20-pin SOIC footprint, and improved drive strength and noise immunity. Use Value: Maintains legacy timing behavior while enhancing reliability via latch-up immunity and ESD hardening - no redesign required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch/register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT534ADBR | Same logic function and timing, but in 20-pin SSOP (DB) package - 5.3 mm width vs. DW's 7.5 mm | Preferred for space-constrained PCBs where height clearance allows thinner profile; thermal resistance θJA = 115°C/W vs. DW's 97°C/W | Select SN74ABT534ADBR when board area is limited and thermal budget permits higher junction rise. |
| SN74ACT534N | ACT-family variant: lower ICC (24 mA max), tighter VOL (0.44 V), but reduced IOL (24 mA) and no latch-up rating published | Suitable for low-power, noise-sensitive logic layers; not recommended for high-current bus driving or harsh industrial environments | Choose SN74ACT534N only for low-noise, low-drive applications where latch-up immunity and 64 mA drive are not required. |
Compared with SN74ABT534ADBR and SN74ACT534N, SN74ABT534DWR offers superior output drive (64 mA), verified latch-up immunity (>500 mA), and optimized thermal performance (θJA = 97°C/W) - making it the preferred choice for industrial bus interface and high-reliability embedded register applications.
Availability
SN74ABT534DWR is available at Aetrix Electronics and suitable for industrial bus interface, computing I/O expansion, test equipment data capture, and legacy system emulation requiring stable component supply across extended production lifecycles.
Supply support for SN74ABT534DWR 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 technologies with over 50 years of innovation in high-reliability digital ICs.
The SN74ABT534DWR belongs to TI's ABT logic family - engineered for high-speed, high-drive 5 V bus interface applications where noise immunity, latch-up robustness, and 3-state controllability are critical design requirements.
FAQ
What is the maximum clock frequency supported by SN74ABT534DWR?
The SN74ABT534DWR supports a maximum clock frequency of 125 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C, CL = 50 pF). This specification is guaranteed across the full industrial temperature range (–40°C to +85°C), enabling use in high-throughput synchronous data paths such as memory-mapped I/O and parallel bus controllers. The SN74ABT534DWR achieves this performance using TI's EPIC-IIB BiCMOS process.
Does SN74ABT534DWR have inverted (Q̅) outputs?
No, the SN74ABT534DWR provides only true (Q) outputs - it does not include complementary (Q̅) outputs. Each of the eight flip-flops delivers a single registered output (Q1–Q8) referenced to the positive edge of CLK. If inverted outputs are required, external inverters or a different part such as SN74ABT574 must be used. This architecture simplifies PCB routing for unidirectional bus driving applications.
What is the recommended power-up sequencing for SN74ABT534DWR?
TI recommends tying OE to VCC through a pullup resistor at power-up to ensure outputs remain in high-impedance state until system initialization completes. The minimum resistor value depends on the driver's current-sinking capability; a 10 kΩ resistor is typical. VCC must be applied before or concurrently with input signals, and SN74ABT534DWR must not be subjected to input voltages exceeding VCC + 0.5 V or below GND – 0.5 V during power transition.
Is SN74ABT534DWR pin-compatible with older 74LS374 devices?
Yes, SN74ABT534DWR is functionally and pin-compatible with 74LS374 in the 20-pin SOIC (DW) package - both share identical pin assignments for CLK, OE, D1–D8, Q1–Q8, VCC, and GND. However, SN74ABT534DWR offers enhanced performance: 125 MHz vs. 30 MHz max clock, 64 mA vs. 24 mA output drive, and built-in latch-up immunity. No PCB changes are required for drop-in replacement.
What is the thermal resistance (θJA) of SN74ABT534DWR in its SOIC-20 package?
The junction-to-ambient thermal resistance (θJA) of SN74ABT534DWR in the SOIC-20 (DW) package is 97°C/W, measured per JEDEC JESD51 standards on a standard 4-layer evaluation board. This value assumes natural convection cooling with no heatsink or forced airflow. Designers should verify junction temperature (TJ = TA + (θJA × PD)) remains below 150°C under worst-case power dissipation (ICC ≤ 30 mA at VCC = 5.5 V).
SN74ABT534DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
- -
SN74ABT534DWR FAQ
1.How can I place an order for SN74ABT534DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT534DWR 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 SN74ABT534DWR reliable?
The price and inventory of SN74ABT534DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT534DWR is usually 5 days.
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SN74ABT534DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT534DWR 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 SN74ABT534DWR?
For technical support, including SN74ABT534DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT534DWR requirements.
6.How does Aetrix verify that SN74ABT534DWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT534DWR 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 SN74ABT534DWR meets industry standards.
7.What is the process for return or replacement of SN74ABT534DWR?
All SN74ABT534DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT534DWR, 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 SN74ABT534DWR part is unused and in its original packaging.
Return procedure for SN74ABT534DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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