Texas Instruments SN74F374DWRE4

Overview

SN74F374DWRE4 from Texas Instruments is an 8-bit edge-triggered D-type flip-flop IC with 3-state bus-driving outputs, designed for high-capacitance or low-impedance bus interfacing. It features positive-edge clock triggering, buffered output enable (OE), full parallel data loading, and operates from 0°C to 70°C at 4.5–5.5 V supply. It is used in I/O port buffering, bidirectional bus drivers, and working registers in legacy TTL-based digital systems.

For engineers reviewing the SN74F374DWRE4 datasheet, SN74F374DWRE4 pinout, SN74F374DWRE4 application, or SN74F374DWRE4 equivalent, key selection criteria include its 20-pin SOIC (DW) package, 70 MHz max clock frequency, 3.2 ns typical propagation delay (CLK→Q), ±24 mA output drive capability, and compatibility with standard 5 V TTL logic families.

Technical Context

The SN74F374DWRE4 implements eight independent D-type flip-flops synchronized to the rising edge of CLK, with each Q output reflecting the corresponding D input state at clock transition. Its 3-state outputs are controlled solely by OE - independent of internal latch operation - enabling data retention or new loading while outputs remain high-impedance.

This device belongs to the TI 74F (Fast TTL) family and uses bipolar Schottky transistor technology. It supports fan-out of 10 standard TTL loads per output and meets JEDEC MS-013 for SOIC packaging. Timing parameters are specified over 0°C to 70°C and VCC = 4.5–5.5 V, with t_PLH/t_PHL ≤ 10 ns and t_PZH/t_PHZ ≤ 12.5 ns under CL = 50 pF conditions.

Key Specifications

Pinout & Package

SN74F374DWRE4 is housed in a 20-pin SOIC (DW) package per JEDEC MS-013, measuring 13.3 mm × 7.5 mm × 2.65 mm (max height), with 1.27 mm lead pitch and RoHS-compliant NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit latch/register applications.

Compared with SN74F373DWRE4, SN74F374DWRE4 provides precise clock-edge synchronization essential for pipeline timing; compared with SN74ACT374PWRE4, it delivers higher drive current and faster propagation in pure 5 V TTL environments but lacks CMOS power efficiency and input voltage flexibility.

Availability

SN74F374DWRE4 is available at Aetrix Electronics and suitable for industrial control I/O expansion, legacy microprocessor data bus interface, test equipment digital pattern generation, and automated test fixture signal conditioning requiring stable component supply and long-term obsolescence management.

Supply support for SN74F374DWRE4 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 founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial, automotive, and communications portfolio coverage.

The SN74F374DWRE4 belongs to TI's 74F Fast TTL logic product line, engineered for high-speed, 5 V-only digital systems requiring reliable timing, strong drive, and backward compatibility with decades-old TTL architectures.

FAQ

What is the maximum clock frequency supported by SN74F374DWRE4?

The SN74F374DWRE4 supports a maximum clock frequency of 70 MHz under recommended operating conditions (VCC = 4.5–5.5 V, TA = 0°C to 70°C). This rating is validated with CL = 50 pF and RL = 500 Ω load, and reflects guaranteed timing performance - not typical or best-case values. Exceeding 70 MHz may result in metastability or setup/hold violations in the SN74F374DWRE4.

Does SN74F374DWRE4 support 3.3 V logic levels?

No, SN74F374DWRE4 is a 5 V-only Fast TTL device. Its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output voltage levels (VOH ≥ 2.4 V at IOL = 24 mA) are specified for 5 V operation only. Driving SN74F374DWRE4 inputs from 3.3 V logic may cause unreliable switching; level-shifting circuitry is required for interoperability with 3.3 V systems.

What is the function of the OE pin on SN74F374DWRE4?

The OE (Output Enable) pin on SN74F374DWRE4 is an active-low control that places all eight Q outputs into high-impedance state when asserted high. It does not affect internal flip-flop operation - data can be loaded or retained while OE is active. This enables safe sharing of data buses among multiple devices without contention, a core requirement in SN74F374DWRE4-based I/O architectures.

Is SN74F374DWRE4 pin-compatible with other 74xx374 variants?

Yes, SN74F374DWRE4 shares identical 20-pin SOIC (DW) pinout and functionality with SN74LS374, SN74ALS374, and SN74AS374 in the same package variant. However, electrical characteristics differ - notably propagation delay, drive strength, and power consumption - so direct substitution requires validation of timing and loading in the target application.

What package type and dimensions does SN74F374DWRE4 use?

SN74F374DWRE4 uses a 20-pin SOIC (DW) package per JEDEC MS-013, with body dimensions of 13.3 mm × 7.5 mm and maximum height of 2.65 mm. Lead pitch is 1.27 mm, and the device features NiPdAu lead finish, RoHS compliance, and moisture sensitivity level (MSL) 1 - allowing unlimited floor life before reflow soldering.