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Texas Instruments SN74ABT534AN
- Part No.:
- SN74ABT534AN
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ABT534AN.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:748
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Product details
Overview
SN74ABT534AN from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for high-drive bus interfacing in industrial and embedded systems. It features +5 V operation, 125 MHz max clock frequency, –32 mA/64 mA output drive, 1.6 ns data setup time, and operates from –40°C to 85°C. It serves as a bidirectional bus driver or I/O port register in memory-mapped peripheral interfaces.
For engineers reviewing the SN74ABT534AN datasheet, SN74ABT534AN pinout, SN74ABT534AN application, or SN74ABT534AN equivalent, key selection criteria include its 20-pin PDIP package, TTL-compatible input thresholds, high-impedance output enable control, latch-up immunity (>500 mA), and ground-bounce performance (<1 V).
Technical Context
This device implements eight independent D-type flip-flops triggered on the rising edge of CLK, each with complementary Q outputs. The OE input controls all eight outputs simultaneously into high-impedance or active logic states without affecting internal storage - enabling concurrent data latching and bus release.
Its EPIC-IIB BiCMOS process delivers low power dissipation while sustaining high-speed switching (tPLH/tPHL ≤ 5.9/6.7 ns at 5 V, CL = 50 pF) and robust ESD protection (>2000 V HBM). Input hysteresis (100 mV) ensures noise immunity on control lines like OE and CLK.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS systems; supports stable operation across industrial voltage tolerances. |
| Max Clock Frequency | 125 MHz - enables use in high-speed synchronous bus applications such as ISA-like or custom parallel data paths. |
| Output Drive | –32 mA IOH / 64 mA IOL - sufficient to directly drive 50 pF loads or terminate stubs on unterminated buses without external buffers. |
| Setup/Hold Time | 1.6 ns tsu / 2 ns th - tight timing margins allow integration into fast microcontroller peripheral interfaces with minimal skew management. |
| Propagation Delay | tPLH ≤ 5.9 ns, tPHL ≤ 6.7 ns - ensures predictable timing alignment across all eight channels under load. |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial environments including factory automation controllers and test equipment. |
| ESD Rating | >2000 V HBM - provides robust handling during board assembly and field service without additional protection circuitry. |
Pinout & Package
SN74ABT534AN uses a 20-pin plastic dual in-line package (PDIP-N), 0.300-inch wide, with standard through-hole mounting and JEDEC MS-001 compliant footprint. Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control that places all Q outputs in high-impedance state; does not affect internal flip-flop operation or stored data. |
| 2–9 | D1–D8 (Data Inputs) | Asynchronous inputs sampled on rising CLK edge; TTL-compatible thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V). |
| 11–18 | Q1–Q8 (True Outputs) | Edge-triggered registered outputs; each capable of –32 mA sink/source with controlled slew for reduced EMI. |
| 10 | GND | Power return reference for all logic and output stages; requires local decoupling near pin. |
| 20 | VCC | +5 V supply rail; must be bypassed with 0.1 µF ceramic capacitor adjacent to pin. |
| 19 | CLK | Global clock input triggering all eight flip-flops synchronously on rising edge; accepts standard TTL waveforms. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive 3-State Outputs | Delivers ±32 mA/±64 mA drive to eliminate need for external bus transceivers in medium-load applications. |
| Edge-Triggered D Flip-Flops | Eight independent registers synchronized to CLK↑, supporting deterministic sampling of parallel data streams. |
| Input Hysteresis | 100 mV threshold margin prevents chatter on noisy OE or CLK lines in electrically harsh environments. |
| Latch-Up Immunity | Exceeds 500 mA per JESD-17 - ensures survivability during transient overcurrent events on shared PCB planes. |
| Ground Bounce Suppression | VOLP < 1 V at VCC = 5 V - minimizes simultaneous switching noise that could corrupt adjacent logic signals. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
Use Scenario: Adding isolated digital input/output capability to programmable logic controller backplanes using parallel address/data buses. IC Role / Device Role / Timing Role: Acts as an 8-bit buffered I/O port register, capturing sensor status or driving actuators under microcontroller command via OE-gated bus access. Use Value: Enables direct connection to 5 V TTL-level field wiring without level shifters or pull-up networks due to strong drive and 3-state isolation. | Use Scenario: Bridging modern microcontrollers to legacy ISA or PC/104 peripheral cards requiring octal latch functionality. IC Role / Device Role / Timing Role: Functions as a clocked data latch translating burst-mode CPU writes into static control signals for older peripherals. Use Value: Provides precise setup/hold timing (1.6 ns/2 ns) and low propagation delay to meet strict ISA timing budgets without added glue logic. |
| Test Equipment Signal Conditioning | Embedded System Boot Configuration Latch |
Use Scenario: Capturing and holding calibration or mode-selection bits in automated test fixtures where signal integrity and noise immunity are critical. IC Role / Device Role / Timing Role: Serves as a noise-immune, edge-triggered configuration register whose outputs remain stable until next CLK event. Use Value: Input hysteresis (100 mV) and latch-up immunity (>500 mA) ensure reliable operation in ESD-prone lab environments with frequent cable hot-plugging. | Use Scenario: Storing hardware boot options (e.g., UART vs SPI debug interface, memory mapping mode) during power-on reset sequencing. IC Role / Device Role / Timing Role: Operates as a nonvolatile configuration latch - retains last-written state even when OE disables outputs during firmware initialization. Use Value: OE independence from internal storage allows safe bus sharing during startup while preserving boot settings across reset cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT574N | Octal D-type transparent latch (no clock edge trigger); identical 3-state drive and package. | Suitable for level-sensitive data capture rather than synchronous edge-triggered registration. | Select when system timing relies on enable-gated latching instead of clock-synchronized sampling. |
| 74ACT534N | Same pinout and function but built on ACT (advanced CMOS) process; lower drive (–24 mA/48 mA) and higher ICC. | Better noise margin (VIH = 3.5 V), but insufficient for driving heavy capacitive loads beyond 30 pF. | Prefer for low-power, noise-critical logic where bus loading is minimal and 5 V compatibility is required. |
Compared with SN74ABT534AN, SN74ABT574N offers level-sensitive latching instead of edge-triggered behavior - making it suitable for asynchronous handshaking, while 74ACT534N trades drive strength for improved noise immunity and lower static current, better fitting low-noise digital subsystems with light bus loading.
Availability
SN74ABT534AN is available at Aetrix Electronics and suitable for industrial PLC expansion, legacy bus interface adapters, test equipment signal conditioning, and embedded system boot configuration latching requiring stable component supply across long production lifecycles.
Supply support for SN74ABT534AN 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 for industrial, automotive, and communications markets.
The ABT logic family - including SN74ABT534AN - was engineered for high-speed, high-drive 5 V bus interfacing with robust noise immunity and latch-up resistance, targeting industrial control and legacy system upgrades.
FAQ
What is the maximum clock frequency supported by SN74ABT534AN?
The SN74ABT534AN supports a maximum clock frequency of 125 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This rating is validated across the full industrial temperature range (–40°C to +85°C), with timing parameters including 1.6 ns setup time and 2 ns hold time ensuring reliable synchronization in high-speed parallel interfaces. The SN74ABT534AN maintains this performance with typical propagation delays of 5.9 ns (tPLH) and 6.7 ns (tPHL) into 50 pF loads.
Does SN74ABT534AN require external pull-up resistors on the OE pin?
Yes - to ensure the outputs enter high-impedance state during power-up or power-down, OE should be tied to VCC through a pull-up resistor. The minimum value depends on the current-sinking capability of the driving source; TI recommends verifying against the specified IOZL limit (–10 µA) and system noise margins. This precaution prevents bus contention before firmware initializes OE control, and applies specifically to SN74ABT534AN in its PDIP package configuration.
Can SN74ABT534AN drive a 50 pF bus load reliably?
Yes - the SN74ABT534AN is characterized for CL = 50 pF in its switching specifications, with guaranteed tPLH ≤ 5.9 ns and tPHL ≤ 6.7 ns at VCC = 5 V and TA = 25°C. Its high-output drive (–32 mA/64 mA) ensures clean signal edges into this load, and ground bounce remains below 1 V, minimizing crosstalk. This makes SN74ABT534AN suitable for direct connection to moderately loaded backplane traces or daughterboard interconnects without buffering.
Is SN74ABT534AN pin-compatible with other members of the ABT family?
SN74ABT534AN shares the same 20-pin PDIP footprint and pinout with SN74ABT574N and SN74ABT244N, but functional differences exist: SN74ABT574N is a transparent latch (not edge-triggered), and SN74ABT244N is a non-inverting buffer. Direct substitution is not recommended without verifying timing architecture and signal flow requirements. The SN74ABT534AN pinout is fixed per datasheet Figure 1 and confirmed for N-package devices.
What is the absolute maximum input voltage rating for SN74ABT534AN?
The absolute maximum input voltage rating for SN74ABT534AN is –0.5 V to 7 V, as specified in the Absolute Maximum Ratings table. This exceeds standard 5 V rail limits and accommodates transient overshoot or undershoot during hot-swap or ESD events. However, sustained operation above 5.5 V or below 0 V violates recommended conditions and may degrade reliability. This rating applies uniformly across all inputs including CLK, Dn, and OE for the SN74ABT534AN device.
SN74ABT534AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 175 MHz
- Max Propagation Delay @ V, Max CL:
- 6.7ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 250 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74ABT534AN FAQ
1.How can I place an order for SN74ABT534AN through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT534AN 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 SN74ABT534AN reliable?
The price and inventory of SN74ABT534AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT534AN is usually 5 days.
3.What payment methods are accepted for SN74ABT534AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT534AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT534AN?
SN74ABT534AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT534AN 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 SN74ABT534AN?
For technical support, including SN74ABT534AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT534AN requirements.
6.How does Aetrix verify that SN74ABT534AN is sourced from the original manufacturer or authorized distributors?
All SN74ABT534AN 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 SN74ABT534AN meets industry standards.
7.What is the process for return or replacement of SN74ABT534AN?
All SN74ABT534AN units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT534AN, 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 SN74ABT534AN part is unused and in its original packaging.
Return procedure for SN74ABT534AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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