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Texas Instruments SN74ABT534APWLE
- Part No.:
- SN74ABT534APWLE
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SN74ABT534APWLE.pdf
- Description:
- BUS DRIVER, ABT SERIES, 8-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
SN74ABT534APWLE from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs in a 20-pin TSSOP package, operating from 4.5 V to 5.5 V, delivering ±32-mA high-drive outputs and 125-MHz maximum clock frequency for bus interface applications.
For engineers reviewing the SN74ABT534APWLE datasheet, SN74ABT534APWLE pinout, SN74ABT534APWLE application, or SN74ABT534APWLE equivalent, key selection considerations include its 3-state output control timing (tPZH = 1 ns min), latch-up immunity (>500 mA), ground bounce performance (<1 V), and compatibility with high-capacitance bus loads in industrial I/O systems.
Technical Context
This device implements eight independent positive-edge-triggered D-type flip-flops with asynchronous 3-state output enable (OE), where OE does not affect internal storage-allowing data retention or updates during high-impedance output states. The architecture uses EPIC-IIB BiCMOS process for low power dissipation and high noise immunity.
Each flip-flop samples D inputs on CLK rising edge and drives complementary Q outputs; OE controls all eight outputs simultaneously. Output drive strength (–32 mA IOH / 64 mA IOL) and fast switching (tPLH = 2.6 ns min at 5 V) support direct connection to heavily loaded parallel buses without external pull-ups or buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL/CMOS logic rails and robust operation across supply variation. |
| Max Clock Frequency | 125 MHz - supports high-speed synchronous data latching in memory address/data bus interfaces. |
| Output Drive | –32 mA IOH / 64 mA IOL - enables direct driving of 50-pF bus loads without external drivers or termination. |
| Propagation Delay | tPLH = 2.6 ns min (CLK to Q) - guarantees sub-3-ns timing margin for 125-MHz system clocks. |
| Enable Timing | tPZH = 1 ns min (OE to Q high-impedance) - allows rapid bus turnaround in bidirectional data transfer protocols. |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating. |
| ESD Protection | >2000 V HBM - provides robust handling tolerance during board assembly and field service. |
Pinout & Package
The SN74ABT534APWLE is housed in a 20-pin Thin Shrink Small-Outline Package (TSSOP-PW), 4.4 mm × 6.5 mm body, 0.65 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control input enabling/disabling all eight outputs; does not affect internal flip-flop state. |
| 2–9, 11–18 | D1–D8, Q1–Q8 | Data inputs and complementary outputs for eight independent D-type flip-flops; pin order follows standard octal layout. |
| 10 | GND | Ground reference for all logic and output stages; requires low-inductance connection to minimize ground bounce. |
| 19 | VCC | Positive supply (4.5–5.5 V); decoupling capacitor required within 1 cm for stable high-speed operation. |
| 20 | CLK | Global clock input triggering all eight flip-flops on rising edge; must meet 3.5-ns minimum pulse width. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB BiCMOS Process | Reduces dynamic power vs. pure bipolar while maintaining TTL-compatible drive and speed. |
| High-Drive 3-State Outputs | –32 mA source / 64 mA sink capability eliminates need for external bus drivers in backplane or motherboard designs. |
| Low Ground Bounce | VOLP < 1 V at 5 V/25°C - minimizes signal integrity risk when multiple outputs switch simultaneously. |
| Latch-Up Immunity | >500 mA per JESD-17 - ensures reliability in noisy industrial power environments with transient coupling. |
| Input Transition Rate Tolerance | 5 ns/V minimum - accommodates slower edge rates from legacy controllers without timing violation. |
Applications
| Industrial I/O Expansion | Memory Address Latching |
|---|---|
Use Scenario: Adding parallel digital I/O to PLC controller modules using shared data/address buses. IC Role / Device Role / Timing Role: Octal D-flip-flop latches incoming command/status bits synchronized to system clock; 3-state outputs isolate bus during idle cycles. Use Value: Enables deterministic timing control of 8-bit peripheral registers with no external glue logic or level shifters. | Use Scenario: Capturing upper address bits from microprocessor during memory read/write cycles. IC Role / Device Role / Timing Role: Edge-triggered storage element holding address lines stable during memory access window. Use Value: Eliminates address skew between CPU and memory subsystems, supporting reliable 125-MHz bus operation. |
| Backplane Bus Interface | Legacy System Data Buffering |
Use Scenario: Interfacing FPGA-based processing cards to legacy VMEbus or ISA-style parallel backplanes. IC Role / Device Role / Timing Role: Bidirectional bus driver with controlled enable timing to prevent bus contention during direction switching. Use Value: Provides 64-mA sink current to drive long traces and multiple receivers without signal degradation. | Use Scenario: Upgrading aging test equipment with modern microcontrollers while retaining original 8-bit parallel instrumentation interfaces. IC Role / Device Role / Timing Role: Synchronizing asynchronous sensor data into processor clock domain with glitch-free output enable sequencing. Use Value: Maintains full backward compatibility with existing firmware and PCB layout due to identical pinout and timing behavior. |
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 |
|---|---|---|---|
| SN74ABT534ADBR | Same electrical specs and functionality; SSOP-20 package (DB drawing), RoHS-compliant, active production status. | Identical use cases but with different thermal resistance (θJA = 115°C/W vs. PW's 128°C/W) and moisture sensitivity level (MSL-1). | Select SN74ABT534ADBR for new designs requiring guaranteed long-term availability and standard tape-and-reel packaging. |
| SN74ABT534ADWR | SOIC-20 (DW) package, same pinout and specs; higher θJA (97°C/W), wider body (7.5 mm), and longer lead time than PW variant. | Better thermal performance in low-airflow environments but requires larger PCB footprint and incompatible land pattern. | Choose SN74ABT534ADWR when board space permits and thermal management prioritizes over miniaturization. |
Compared with SN74ABT534APWLE, SN74ABT534ADBR offers assured supply continuity and MSL-1 handling, while SN74ABT534ADWR delivers superior thermal dissipation at the cost of board area-both retain identical timing, drive, and logic behavior for drop-in functional replacement in non-space-constrained layouts.
Availability
SN74ABT534APWLE is available at Aetrix Electronics and suitable for industrial I/O expansion, memory address latching, backplane bus interfacing, and legacy system data buffering requiring stable component supply across extended product lifecycles.
Supply support for SN74ABT534APWLE 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74ABT534A family was designed to deliver high-speed, high-drive 3-state logic for bus-oriented systems where signal integrity, noise immunity, and latch-up robustness are critical in harsh operating environments.
FAQ
What is the recommended power supply decoupling for SN74ABT534APWLE?
Place a 0.1-µF ceramic capacitor between VCC (Pin 19) and GND (Pin 10) within 1 cm of the SN74ABT534APWLE package. For systems with heavy simultaneous switching, add a 4.7-µF bulk capacitor nearby. This prevents voltage droop and suppresses ground bounce below the specified <1 V VOLP limit at 5 V and 25°C.
Does SN74ABT534APWLE support hot insertion or live bus swapping?
No-SN74ABT534APWLE is not hot-swap rated. Its absolute maximum ratings specify VI and VO limits of –0.5 V to 7 V and –0.5 V to 5.5 V respectively, but no current-limiting or precharge circuitry is integrated. Applying VCC before establishing proper GND connection or enabling OE while bus voltages float may exceed clamp current limits (–18 mA IIK, –50 mA IOK) and cause damage.
Can OE be left floating during normal operation of SN74ABT534APWLE?
No-OE (Pin 1) must be actively driven high or low. A floating OE violates the recommended operating condition that unused inputs be held high or low to prevent oscillation and excessive ICC. TI specifies tying OE to VCC via a pullup resistor during power-up/down to guarantee high-impedance state; minimum resistor value depends on driver sink capability but typically ranges from 4.7 kΩ to 10 kΩ.
What is the maximum capacitive load SN74ABT534APWLE can drive reliably?
SN74ABT534APWLE is characterized for CL = 50 pF in timing tests, and its 64-mA IOL rating supports driving ≥50 pF loads at full speed (125 MHz). For heavier loads, propagation delays increase linearly-e.g., tPHL rises from 3.4 ns (min) at 50 pF to ~5.5 ns (typ) at 100 pF. Layout best practices (short traces, ground plane) are essential to maintain signal fidelity beyond 50 pF.
Is SN74ABT534APWLE pin-compatible with older SN74ABT534 variants?
Yes-SN74ABT534APWLE shares identical pinout, function, and timing with all SN74ABT534A variants including DB, DW, and N packages. The TSSOP-PW footprint differs mechanically, but signal assignments (OE, CLK, D1–D8, Q1–Q8, VCC, GND) match exactly. No PCB redesign is needed beyond adapting land pattern and stencil for 0.65-mm pitch.
SN74ABT534APWLE 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:
- -
- Supplier Device Package:
- -
SN74ABT534APWLE FAQ
1.How can I place an order for SN74ABT534APWLE through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT534APWLE 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 SN74ABT534APWLE reliable?
The price and inventory of SN74ABT534APWLE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT534APWLE is usually 5 days.
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4.How is shipping managed for SN74ABT534APWLE?
SN74ABT534APWLE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT534APWLE 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 SN74ABT534APWLE?
For technical support, including SN74ABT534APWLE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT534APWLE requirements.
6.How does Aetrix verify that SN74ABT534APWLE is sourced from the original manufacturer or authorized distributors?
All SN74ABT534APWLE 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 SN74ABT534APWLE meets industry standards.
7.What is the process for return or replacement of SN74ABT534APWLE?
All SN74ABT534APWLE units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT534APWLE, 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 SN74ABT534APWLE part is unused and in its original packaging.
Return procedure for SN74ABT534APWLE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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