Texas Instruments SN74ACT16374QDLREP

Overview

SN74ACT16374QDLREP from Texas Instruments is a radiation-tolerant, 16-bit edge-triggered D-type flip-flop with 3-state outputs in a 48-pin SSOP package, operating from 4.5 V to 5.5 V over –40°C to +125°C. It features dual 8-bit sections, TTL-compatible inputs, distributed V_CC/GND pins for noise suppression, and flow-through pinout for optimized PCB layout - used in aerospace data buffers, avionics I/O ports, and high-reliability bus drivers.

For engineers reviewing the SN74ACT16374QDLREP datasheet, SN74ACT16374QDLREP pinout, SN74ACT16374QDLREP application, or SN74ACT16374QDLREP equivalent, key selection criteria include extended temperature operation (–40°C to 125°C), 3-state bus-driving capability, 65 MHz max clock frequency, ±16 mA output drive, and enhanced product change notification for long-lifecycle programs.

Technical Context

This device implements two independent 8-bit D-type flip-flop sections, each with separate clock (CLK) and output-enable (OE) controls. Data is latched on the positive edge of CLK, and outputs enter high-impedance when OE is high - enabling bidirectional bus control without external pull-ups or interface logic.

Its Widebus™ architecture includes distributed power/ground pins (eight V_CC and eight GND across the 48-pin SSOP), minimizing simultaneous switching noise. Inputs accept TTL-voltage levels (V_IL ≤ 0.8 V, V_IH ≥ 2 V), and outputs drive capacitive loads up to 50 pF with t_PLH/t_PHL ≤ 13.2 ns at V_CC = 5.5 V.

Key Specifications

Pinout & Package

SN74ACT16374QDLREP is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 10.2 mm × 12.6 mm body size, 0.635 mm pitch, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered bus driver applications.

Compared with SN74ACT16374QDLREP, SN74ACT16373QDLREP offers transparent latching but lacks clock-edge synchronization, while SN74LVCH16374AQRHRRQ1 provides lower-voltage operation and automotive qualification but omits radiation-hardened pedigree and 5 V tolerance.

Availability

SN74ACT16374QDLREP is available at Aetrix Electronics and suitable for avionics data buffering, satellite command interfacing, and rad-hard I/O expansion requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for SN74ACT16374QDLREP 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 high-reliability ICs, with decades of heritage in space-qualified components and military-grade assurance.

SN74ACT16374QDLREP belongs to TI's Widebus™ family of high-speed, 3-state bus-interface devices engineered for aerospace, defense, and industrial systems demanding extended temperature operation and manufacturing pedigree.

FAQ

What is the maximum clock frequency supported by SN74ACT16374QDLREP?

The SN74ACT16374QDLREP supports a maximum clock frequency of 65 MHz across its full operating temperature range (–40°C to +125°C), verified under recommended conditions (V_CC = 4.5 V to 5.5 V). This value reflects guaranteed timing performance including setup (t_su = 6.5 ns) and hold (t_h = 1 ns) margins - making SN74ACT16374QDLREP suitable for high-throughput data capture in real-time avionics subsystems.

Does SN74ACT16374QDLREP support true 3-state outputs with independent control per section?

Yes, SN74ACT16374QDLREP provides true (non-inverting) 3-state outputs with two independent output-enable inputs: 1OE controls Q1–Q8 and 2OE controls Q1–Q8 of the second section. When OE is high, outputs enter high-impedance without affecting internal flip-flop state - enabling SN74ACT16374QDLREP to serve as a bidirectional bus driver in multi-master architectures without external isolation components.

What packaging and assembly qualifications apply to SN74ACT16374QDLREP?

SN74ACT16374QDLREP uses a 48-pin SSOP (DL) package with NIPDAU lead finish, MSL Level-1 (unlimited floor life at ≤30°C/60% RH), and is assembled under Controlled Baseline conditions: single fabrication and test site. It is qualified per JEDEC standards for extended temperature (–40°C to +125°C), including HAST, temperature cycling, and electromigration testing - confirming SN74ACT16374QDLREP's suitability for mission-critical aerospace deployments.

Can SN74ACT16374QDLREP be used as two independent 8-bit registers?

Yes, SN74ACT16374QDLREP is architecturally divided into two functionally independent 8-bit sections: Section 1 (pins 1D1–1D8, 1Q1–1Q8, 1CLK, 1OE) and Section 2 (pins 2D1–2D8, 2Q1–2Q8, 2CLK, 2OE). Each section operates autonomously - allowing SN74ACT16374QDLREP to implement dual 8-bit latches with separate clocks and enables, ideal for time-division multiplexed I/O or split-data-path buffering.

Is SN74ACT16374QDLREP compatible with standard 5 V TTL logic families?

Yes, SN74ACT16374QDLREP features TTL-voltage compatible inputs (V_IH ≥ 2 V, V_IL ≤ 0.8 V) and outputs that drive standard 5 V TTL loads (±16 mA at V_OH ≥ 3.7 V, V_OL ≤ 0.5 V). This ensures direct interoperability with legacy 74LS, 74ALS, and other 5 V TTL devices - eliminating level-shifting circuitry when integrating SN74ACT16374QDLREP into mixed-logic systems.