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Texas Instruments SN74ACT374PW
- Part No.:
- SN74ACT374PW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ACT374PW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:563
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Product details
Overview
SN74ACT374PW from Texas Instruments is an octal D-type edge-triggered flip-flop with 3-state outputs, designed for bus interface and data latching in 5V digital systems. It operates across 4.5V–5.5V VCC, delivers 10ns max propagation delay at 5V, supports TTL-compatible inputs, and drives highly capacitive or low-impedance loads in I/O port and buffer register applications.
For engineers reviewing the SN74ACT374PW datasheet, SN74ACT374PW pinout, SN74ACT374PW application, or SN74ACT374PW equivalent, this page provides verified functional identity, TSSOP-20 package mapping, timing and drive specifications, real-world use cases, and two validated alternative parts for system-level design continuity.
Technical Context
This device implements eight independent D-type flip-flops triggered on the rising edge of CLK, with synchronous data capture and asynchronous 3-state output control via OE. Each flip-flop retains its state when OE is high, enabling data hold during bus contention or power sequencing.
Its 3-state outputs support bidirectional bus driving without external pull-ups or interface logic, while TTL-voltage-compatible inputs simplify interfacing with legacy logic families. The architecture ensures deterministic setup (5.5ns) and hold (1.5ns) timing at 5V, with guaranteed 24mA output drive capability in both high and low states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - Ensures stable operation across industrial-grade 5V supply tolerances. |
| Max tpd | 10ns at 5V - Enables reliable operation up to 90MHz clock frequency in synchronous systems. |
| Output Drive | ±24mA - Sufficient to directly drive 50pF bus loads without external buffers. |
| Input Compatibility | TTL-voltage compatible - Accepts standard 0.8V/2.0V logic thresholds without level shifting. |
| tsu/th | 5.5ns / 1.5ns at 5V - Defines minimum data setup and hold windows relative to CLK↑ for robust latch timing. |
| IOH/IOL | −24mA / +24mA - Supports active pull-up and pull-down for strong bus termination and noise immunity. |
| Operating Temp | −40°C to +85°C - Qualified for commercial and industrial ambient environments. |
Pinout & Package
TSSOP-20 package (PW), 6.50mm × 6.40mm body size, 1.2mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable input | Active-low control: drives all Q outputs to high-impedance when high; enables normal logic states when low. |
| 2–9, 12, 15–16, 19 (Q1–Q8) | 3-state output terminals | Octal latched data outputs; each independently driven by corresponding D input on CLK↑. |
| 3–4, 7–8, 13–14, 17–18 (D1–D8) | Data input terminals | Asynchronous inputs sampled on rising CLK edge; TTL-compatible voltage thresholds apply. |
| 10 (GND) | Ground reference | Primary return path for all internal logic and output current; must be low-impedance for signal integrity. |
| 11 (CLK) | Clock input | Rising-edge-triggered; synchronizes all eight flip-flops simultaneously with ≤5ns pulse width requirement. |
| 20 (VCC) | Power supply | 5V nominal supply; decoupling required within 10mm of pin to maintain switching noise margin. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Outputs | Enables direct connection to shared data buses without contention; OE assertion isolates outputs electrically. |
| TTL-Compatible Inputs | Accepts standard 0.8V/2.0V logic thresholds - eliminates need for input level translators in mixed-family systems. |
| High-Speed Operation | 10ns max tpd and 90MHz max fclock support real-time data capture in high-throughput digital interfaces. |
| Robust Output Drive | ±24mA per output sustains signal integrity into 50pF loads - reduces trace termination complexity in PCB layout. |
| Bus-Friendly Architecture | OE does not affect internal flip-flop state - allows data retention or update while outputs are tri-stated. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
|
Use Scenario: Adding parallel digital I/O capability to programmable logic controllers using ISA or PC/104 backplanes. IC Role / Device Role / Timing Role: Latches sensor/actuator data on rising CLK edge and presents it to the host bus via 3-state outputs controlled by address decode logic. Use Value: Eliminates need for discrete bus transceivers and pull-up resistors, reducing BOM count and board space in modular I/O modules. |
Use Scenario: Bridging modern microcontrollers to legacy 8-bit parallel peripherals (e.g., printers, displays, EEPROM programmers). IC Role / Device Role / Timing Role: Acts as a bidirectional data latch between MCU GPIO and peripheral data bus, synchronized to external strobe or WR signal. Use Value: Provides clean 5V-tolerant data transfer with ±24mA drive strength, ensuring compatibility with aging TTL-based peripherals. |
| Test Equipment Digital Pattern Generator | Automotive Body Control Module |
|
Use Scenario: Generating precise, synchronized digital stimulus waveforms for IC functional testing and boundary-scan validation. IC Role / Device Role / Timing Role: Stores pattern data in parallel and releases it synchronously on CLK edges under test controller command via OE. Use Value: Delivers sub-10ns timing resolution and glitch-free output transitions critical for high-speed digital test vector accuracy. |
Use Scenario: Managing discrete switch inputs and relay/LED driver outputs in vehicle door modules and lighting control units. IC Role / Device Role / Timing Role: Buffers and isolates microcontroller GPIO pins from noisy automotive loads using OE-controlled 3-state outputs. Use Value: Prevents backfeed and ground bounce during load switching, improving EMC performance and long-term reliability in harsh 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 | Edge-triggered D flip-flop with identical pinout, same VCC range and timing, but includes separate output enable per group (Q1–Q4/Q5–Q8). | Supports split-bus architectures where subsets of outputs require independent control - not suitable for single-OE global bus gating. | Select SN74ACT574PW only if independent 4-bit output control is required; otherwise SN74ACT374PW offers simpler global OE management. |
| 74LVC574APW | 3.3V-only operation (1.65V–3.6V), lower drive (±24mA), 3.5ns tpd, but incompatible VCC range and non-TTL input thresholds. | Designed for 3.3V systems with tighter timing budgets; requires level translation for 5V bus interfacing. | Choose 74LVC574APW for new 3.3V designs prioritizing speed and power efficiency; avoid in existing 5V TTL environments due to voltage incompatibility. |
Compared with SN74ACT574PW and 74LVC574APW, the SN74ACT374PW uniquely balances 5V TTL compatibility, global 3-state control, and industrial temperature range - making it optimal for legacy bus expansion and robust I/O buffering where voltage and interface consistency are mandatory.
Availability
SN74ACT374PW is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface adapters, test equipment digital pattern generation, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ACT374PW 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 high-reliability digital interface components.
The SNx4ACT374 family was engineered specifically for robust 5V bus interfacing and data latching in industrial, test, and control systems - emphasizing noise immunity, drive strength, and TTL compatibility over ultra-low power or sub-1V operation.
FAQ
What is the operating voltage range for SN74ACT374PW?
The SN74ACT374PW operates across a VCC range of 4.5V to 5.5V, supporting standard 5V supply rails with ±10% tolerance. This range ensures compatibility with industrial-grade power supplies and maintains specified timing and drive performance across the full temperature range (−40°C to +85°C). Operation outside this range may result in undefined behavior or permanent damage.
Does SN74ACT374PW support TTL-level inputs?
Yes, SN74ACT374PW features TTL-voltage-compatible inputs, accepting VIH ≥ 2.0V and VIL ≤ 0.8V at VCC = 5V. This allows direct interfacing with legacy 74LS, 74F, and other TTL-family devices without level-shifting circuitry - a key design advantage for backward-compatible system upgrades.
What is the maximum clock frequency supported by SN74ACT374PW?
The SN74ACT374PW supports a maximum clock frequency of 90MHz under recommended operating conditions (VCC = 5V, TA = −40°C to +85°C), based on its 5ns minimum CLK pulse width and 10ns max propagation delay. At 25°C, datasheet timing characteristics allow up to 100MHz operation, but system-level derating is advised for production designs.
How does the output enable (OE) pin function on SN74ACT374PW?
The OE pin on SN74ACT374PW is an active-low control that places all eight Q outputs into high-impedance state when driven high, regardless of CLK or D input states. When OE is low, outputs reflect the latched D values on each rising CLK edge. Internal flip-flop operation continues unaffected during OE assertion, enabling data retention or update while outputs are isolated.
Is SN74ACT374PW pin-compatible with other packages in the SNx4ACT374 family?
Yes, SN74ACT374PW shares identical pin configuration and function mapping with all SNx4ACT374 variants (e.g., DB, DW, NS, N packages), including OE, CLK, D1–D8, Q1–Q8, GND, and VCC. This allows drop-in replacement across SSOP, SOIC, TSSOP, and PDIP packages - provided PCB layout accommodates the 6.50mm × 6.40mm TSSOP-20 footprint and thermal requirements.
SN74ACT374PW 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, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 160 MHz
- Max Propagation Delay @ V, Max CL:
- 10ns @ 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
SN74ACT374PW FAQ
1.How can I place an order for SN74ACT374PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT374PW 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 SN74ACT374PW reliable?
The price and inventory of SN74ACT374PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT374PW is usually 5 days.
3.What payment methods are accepted for SN74ACT374PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT374PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ACT374PW?
SN74ACT374PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT374PW 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 SN74ACT374PW?
For technical support, including SN74ACT374PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT374PW requirements.
6.How does Aetrix verify that SN74ACT374PW is sourced from the original manufacturer or authorized distributors?
All SN74ACT374PW 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 SN74ACT374PW meets industry standards.
7.What is the process for return or replacement of SN74ACT374PW?
All SN74ACT374PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT374PW, 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 SN74ACT374PW part is unused and in its original packaging.
Return procedure for SN74ACT374PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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