Texas Instruments 74AC16374DLR

Overview

74AC16374DLR from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for high-capacitance bus driving and I/O port buffering. It operates from –40°C to 85°C, supports 3–5.5 V supply, delivers 100 MHz max clock frequency at 5 V, and features dual 8-bit or unified 16-bit configuration with independent output-enable control per bank.

For engineers reviewing the 74AC16374DLR datasheet, 74AC16374DLR pinout, 74AC16374DLR application, or 74AC16374DLR equivalent, this device is selected for bidirectional data latching in memory interfaces, register file expansion, and high-noise-margin digital system interconnects where flow-through layout and distributed power/ground pins are critical.

Technical Context

The 74AC16374DLR implements two independent 8-bit D-type flip-flop banks, each with dedicated clock (1CLK/2CLK) and output-enable (1OE/2OE) inputs. Data is latched on the positive edge of CLK, and OE controls high-impedance state without affecting internal storage - enabling concurrent data retention and bus release.

Its EPIC™ 1-µm CMOS process ensures 500-mA latch-up immunity at 125°C, while the shrink small-outline (DL) package features 48 pins with distributed VCC/GND pairs to minimize switching noise. The flow-through pin architecture places inputs on one side and outputs on the opposite, optimizing PCB trace routing and signal integrity.

Key Specifications

Pinout & Package

74AC16374DLR is housed in a 48-pin shrink small-outline package (SSOP-DL), 300-mil body width, 25-mil pin pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit edge-triggered D-type flip-flop applications.

Compared with SN74ACT16374DLR and 74LVC16374ADLRG4, the 74AC16374DLR offers broader voltage flexibility (3–5.5 V), superior latch-up immunity, and industrial temperature range - making it the preferred choice for robust, mixed-voltage industrial control and instrumentation where reliability trumps minimum delay.

Availability

74AC16374DLR is available at Aetrix Electronics and suitable for memory interface buffering, industrial I/O expansion, backplane data latching, and digital test equipment bus driving requiring stable component supply and long-term industrial lifecycle support.

Supply support for 74AC16374DLR 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 decades of expertise in high-reliability industrial and automotive ICs.

The 74AC16374DLR belongs to TI's Widebus™ family of high-speed, noise-immune bus-interface logic devices, engineered specifically for robust data latching and bus driving in electrically demanding industrial and instrumentation systems.

FAQ

What is the maximum clock frequency supported by the 74AC16374DLR?

The 74AC16374DLR supports a maximum clock frequency of 100 MHz when operated at 5 V supply and 25°C ambient temperature, as specified in the switching characteristics table. At 3.3 V, the maximum frequency reduces to 60 MHz. These values reflect guaranteed timing performance under recommended operating conditions, not typical or best-case figures.

Does the 74AC16374DLR support independent clocking of its two 8-bit sections?

Yes, the 74AC16374DLR provides separate clock inputs - 1CLK for the first 8-bit bank (1D1–1D8 → 1Q1–1Q8) and 2CLK for the second (2D1–2D8 → 2Q1–2Q8). This allows asynchronous or staggered latching across the 16-bit width, which is essential for applications like dual-port register files or split-bus arbitration schemes.

What is the purpose of the multiple VCC and GND pins on the 74AC16374DLR package?

The 74AC16374DLR features five VCC and eight GND pins distributed across the 48-pin DL package to minimize simultaneous switching noise and reduce power delivery impedance. This layout lowers ground bounce, improves signal integrity during high-speed transitions, and enhances latch-up immunity - critical for stable operation in dense, high-frequency PCB layouts.

Can the 74AC16374DLR be used in a 3.3 V system?

Yes, the 74AC16374DLR is fully specified for operation from 3 V to 5.5 V, including at 3.3 V ± 0.3 V. At 3.3 V, it delivers 60 MHz maximum clock frequency, 7.5 ns setup time, and maintains full 3-state output functionality. Its AC logic family ensures compatibility with both 3.3 V and 5 V signaling domains without level-shifting.

Is the 74AC16374DLR pin-compatible with other 16-bit flip-flops in TI's Widebus family?

Yes, the 74AC16374DLR shares identical pinout and package (DL-48) with functionally related Widebus devices including the SN74ACT16374DLR and 74AC16244DLR, enabling drop-in substitution where voltage and timing requirements align. However, functional differences - such as input threshold levels or drive strength - must be verified per application.