My Inquiry
My Account
Texas Instruments SN74ACT534PW
- Part No.:
- SN74ACT534PW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ACT534PW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:750
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ACT534PW from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state inverting outputs, designed for high-capacitance bus driving in 4.5–5.5 V systems. It delivers 10.5 ns max propagation delay at 5 V, TTL-compatible inputs, and ±24 mA output drive-enabling direct interface to bidirectional data buses without pull-ups or buffers.
For engineers reviewing the SN74ACT534PW datasheet, SN74ACT534PW pinout, SN74ACT534PW application, or SN74ACT534PW equivalent, key selection criteria include its TSSOP-20 package, 3-state output control via OE, clock-edge-triggered data latching, and compatibility with industrial temperature range (–40°C to 85°C) designs requiring deterministic timing and bus isolation.
Technical Context
This device implements eight independent D-type flip-flops, each triggered on the positive clock edge to load complemented input data (Q = NOT D) into storage. Internal logic remains fully operational regardless of OE state-allowing data retention or update while outputs are in high-impedance mode.
The 3-state outputs support active-low OE control, enabling bus arbitration in shared-data-path systems. With inputs tolerant up to 5.5 V and guaranteed operation across 4.5–5.5 V VCC, it interfaces seamlessly with mixed-voltage logic domains while maintaining noise margins per TTL thresholds (VIH = 2 V, VIL = 0.8 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard 5 V supply tolerances and brown-out conditions. |
| Max tpd | 10.5 ns at 5 V - Enables reliable 85 MHz clock operation in synchronous bus interfaces. |
| Output Drive | ±24 mA - Sufficient to drive 50 pF loads directly without external buffers or termination. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - Interoperates with legacy 74LS/74F logic families. |
| OE Control | Active-low, non-inverting relative to internal flip-flop operation - Allows asynchronous bus release without disrupting stored state. |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade embedded control and instrumentation applications. |
| Package | TSSOP-20 (PW) - 4.4 mm × 6.5 mm footprint with 0.65 mm pitch, optimized for high-density PCB layouts. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, JEDEC MO-153 compliant. RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data inputs (D1–D8) | Asynchronous parallel data inputs sampled on CLK↑; TTL-compatible voltage thresholds. |
| 9 | GND | Power ground reference for all I/O and internal logic; requires low-impedance PCB connection. |
| 10 | VCC | Positive supply (4.5–5.5 V); decoupling capacitor required within 1 cm of pin. |
| 11, 12, 13, 14, 15, 16, 17, 18 | Inverting outputs (Q1–Q8) | 3-state complementary outputs; high-impedance when OE = HIGH. |
| 19 | CLK | Positive-edge-triggered clock input; minimum pulse width 3.5 ns at 25°C. |
| 20 | OE | Active-low output enable; does not affect internal flip-flop state or clock operation. |
Key Features
| Feature | Design Value |
|---|---|
| Octal D-type storage | Eight independent edge-triggered registers with Q = NOT D behavior-ideal for inverted bus buffering and latch-based I/O port expansion. |
| 3-state inverting outputs | Direct drive of capacitive bus lines up to 50 pF without external components; eliminates need for pull-up resistors or discrete transceivers. |
| Full parallel access | All eight D inputs and Q outputs accessible simultaneously-supports byte-wide data transfers in microcontroller peripheral interfaces. |
| OE-independent internal operation | Flip-flop state updates and retention continue during high-impedance output mode-enables glitch-free bus handoff in multi-master systems. |
| TTL-input compatibility | Accepts standard 74LS/74F logic levels at VCC = 4.5–5.5 V-simplifies integration into mixed-logic-family backplanes and legacy control boards. |
Applications
| Industrial PLC I/O Module | Legacy Bus Interface Adapter |
|---|---|
Use Scenario: Isolating and latching sensor/actuator signals in modular programmable logic controller racks with shared backplane data buses. IC Role / Device Role / Timing Role: Octal register providing synchronized sampling of 8-bit parallel inputs and 3-state-controlled output to bus under PLC scan-cycle timing. Use Value: Eliminates external bus transceivers and reduces component count by integrating level-shifting, storage, and bus contention management in one TSSOP-20 IC. |
Use Scenario: Bridging modern microcontrollers to legacy ISA or VMEbus peripherals requiring TTL-compatible, edge-triggered data capture. IC Role / Device Role / Timing Role: D-type latch capturing 8-bit address/data on rising CLK edge, with OE coordinated to bus grant signals for arbitration. Use Value: Provides deterministic setup/hold timing (tsu = 4 ns, th = 1.5 ns @ 25°C) and 10.5 ns propagation-meeting tight ISA bus cycle requirements without FPGA logic. |
| Test Equipment Digital Pattern Generator | Automated Test Fixture Controller |
Use Scenario: Generating precise, synchronized digital stimulus waveforms for IC functional testing using pattern memory and clock-controlled output staging. IC Role / Device Role / Timing Role: Edge-triggered storage element holding test vector bits; 3-state outputs allow dynamic reconfiguration of signal routing paths. Use Value: ±24 mA drive strength ensures clean edges into 50 Ω scope probes or DUT inputs; 83°C/W θJA enables stable operation in compact test head enclosures. |
Use Scenario: Controlling solenoid valves, relays, and LED indicators in automated manufacturing test fixtures where multiple devices share a common control bus. IC Role / Device Role / Timing Role: Output register latching command bytes from host MCU and releasing them onto shared control bus only when enabled by system arbiter. Use Value: Active-low OE allows fail-safe default (high-Z) on power-up; input clamp current rating (±20 mA) protects against ESD events in factory floor environments. |
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 |
|---|---|---|---|
| SN74ACT574PW | Non-inverting 3-state outputs (Q = D), identical timing and drive specs. | Used where bus polarity must match input data without inversion-e.g., transparent latch replacement or non-inverted data path buffering. | Select when output inversion is undesirable; otherwise SN74ACT534PW provides inherent signal inversion for complementary bus architectures. |
| SN74LVC574APW | Lower VCC range (1.65–3.6 V), 32 mA drive, but no TTL input compatibility. | Suitable for 3.3 V-only systems with higher drive needs; incompatible with 5 V TTL inputs without level translation. | Choose for modern low-voltage designs; avoid if interfacing with legacy 5 V logic or mixed-supply backplanes. |
Compared with SN74ACT574PW and SN74LVC574APW, the SN74ACT534PW uniquely combines 5 V TTL compatibility, inverting outputs, and industrial temperature rating-making it the only option for retrofitting legacy 5 V bus systems requiring signal inversion and robust noise immunity.
Availability
SN74ACT534PW is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy bus interface adapters, automated test fixture controllers, and digital pattern generators requiring stable component supply and long-term design continuity.
Supply support for SN74ACT534PW 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 and automotive electronics.
The SN74ACT534PW belongs to TI's ACT (Advanced CMOS Technology) logic family-designed specifically for high-speed, low-noise 5 V digital systems requiring TTL compatibility, bus-driving capability, and industrial reliability.
FAQ
What is the maximum clock frequency supported by the SN74ACT534PW?
The SN74ACT534PW supports a maximum clock frequency of 85 MHz over its full operating temperature range (–40°C to +85°C). At 25°C, the device achieves up to 120 MHz operation, but system-level timing margins should be validated per actual board layout, load capacitance, and supply stability. The SN74ACT534PW datasheet specifies minimum clock pulse width (tw) of 3.5 ns at 25°C.
Does the SN74ACT534PW require external pull-up resistors on the OE pin?
Yes-the SN74ACT534PW OE pin is active-low and should be tied to VCC through a pull-up resistor during power-up or power-down to ensure outputs remain in high-impedance state. TI recommends calculating the minimum resistor value based on the driver's current-sinking capability; typical values range from 4.7 kΩ to 10 kΩ for standard CMOS drivers.
Can the SN74ACT534PW interface directly with 3.3 V microcontrollers?
No-the SN74ACT534PW operates strictly at 4.5–5.5 V and has TTL-compatible inputs (VIH = 2 V min), but its outputs swing rail-to-rail at 5 V. Direct connection to 3.3 V logic may damage the microcontroller inputs. A level-shifter or series resistor + clamping diode network is required for safe interfacing with 3.3 V systems.
What is the thermal resistance (θJA) of the SN74ACT534PW in its TSSOP-20 package?
The SN74ACT534PW in the TSSOP-20 (PW) package has a junction-to-ambient thermal resistance (θJA) of 83°C/W, as specified in the absolute maximum ratings table. This value assumes standard JEDEC test board conditions (2-layer board, 1 in² copper area per side); actual performance improves with enhanced PCB copper pour and thermal vias.
Is the SN74ACT534PW pin-compatible with other members of the SN74ACT534 family?
Yes-the SN74ACT534PW shares identical pinout and functionality with all SN74ACT534 variants in SOIC (DW), SSOP (DB), PDIP (N), and SOP (NS) packages. All 20-pin versions implement the same octal D-type flip-flop with 3-state inverting outputs, clock, OE, VCC, and GND pin assignments per the top-view diagram in the datasheet.
SN74ACT534PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- 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:
- 100 MHz
- Max Propagation Delay @ V, Max CL:
- 11.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- 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
SN74ACT534PW FAQ
1.How can I place an order for SN74ACT534PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT534PW 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 SN74ACT534PW reliable?
The price and inventory of SN74ACT534PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT534PW is usually 5 days.
3.What payment methods are accepted for SN74ACT534PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT534PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ACT534PW?
SN74ACT534PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT534PW 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 SN74ACT534PW?
For technical support, including SN74ACT534PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT534PW requirements.
6.How does Aetrix verify that SN74ACT534PW is sourced from the original manufacturer or authorized distributors?
All SN74ACT534PW 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 SN74ACT534PW meets industry standards.
7.What is the process for return or replacement of SN74ACT534PW?
All SN74ACT534PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT534PW, 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 SN74ACT534PW part is unused and in its original packaging.
Return procedure for SN74ACT534PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ACT534PW Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
