Texas Instruments SN74AHCT16374DGVR

Overview

SN74AHCT16374 from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs in a 48-pin TVSOP (DGV) package, operating from –40°C to 85°C at 4.5–5.5 V supply. It features TTL-compatible inputs, ±8 mA output drive, 2.5 ns data setup/hold time, and supports dual 8-bit or single 16-bit register operation for bus interface applications.

For engineers reviewing the SN74AHCT16374 datasheet, SN74AHCT16374 pinout, SN74AHCT16374 application, or SN74AHCT16374 equivalent, key selection criteria include 3-state bus driving capability, low propagation delay (≤10.5 ns @ 15 pF), input voltage compatibility with TTL logic, thermal performance (θ_JA = 58°C/W), and industrial temperature range compliance.

Technical Context

This device implements two independent 8-bit positive-edge-triggered D flip-flops with shared clock and output-enable controls per bank. Each bank's eight outputs are individually controllable via dedicated OE pins (1OE, 2OE), enabling high-impedance states without affecting internal latch operation or data retention.

It uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) process with distributed V_CC/GND pins to suppress high-speed switching noise. The flow-through pinout-data inputs on one side, outputs on the opposite-minimizes PCB trace crossovers and improves signal integrity in dense bus architectures.

Key Specifications

Pinout & Package

SN74AHCT16374DGVR is housed in a 48-pin Thin Very Small Outline Package (TVSOP, DGV), 12.6 mm × 6.1 mm × 1.2 mm body, JEDEC MO-153 compliant, with 0.4 mm pitch leads and exposed pad not present. Pin 1 located at top-left corner (Q1 quadrant), marked by beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state D-flip-flop applications.

Compared with SN74AHCT16374DGVR, SN74AHCT16244DGVR provides no storage functionality-making it unsuitable for timing-critical register applications-while 74LVCH16374ADGG trades 5 V compatibility for lower voltage operation and faster timing, necessitating redesign of input interface circuitry.

Availability

SN74AHCT16374DGVR is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded computing applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74AHCT16374DGVR 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 experience in high-reliability logic families and industrial-grade IC design.

The SN74AHCT16374 belongs to TI's Widebus™ family of high-speed, low-noise bus interface devices, engineered specifically for robust 5 V system interconnect in noise-sensitive industrial and instrumentation environments.

FAQ

What is the maximum clock frequency supported by SN74AHCT16374DGVR?

The SN74AHCT16374DGVR supports a maximum clock frequency of 80 MHz under recommended conditions (V_CC = 5 V ± 0.5 V, C_L = 50 pF). This is derived from its maximum propagation delay of 11.5 ns and minimum pulse width of 6.5 ns. At lighter loads (C_L = 15 pF), operation up to 110 MHz is specified. Actual system-level frequency depends on board layout, termination, and fanout.

Does SN74AHCT16374DGVR require external pull-up resistors on OE pins?

Yes - to ensure outputs remain in high-impedance during power-up or power-down, each OE pin (1OE, 2OE) should be tied to V_CC through a pull-up resistor. TI recommends a value based on the driver's current-sinking capability; typical values range from 4.7 kΩ to 10 kΩ. Leaving OE floating risks undefined output states and potential bus contention.

Can SN74AHCT16374DGVR operate with a 3.3 V supply?

No - SN74AHCT16374DGVR is specified only for 4.5–5.5 V operation. Its TTL-compatible input thresholds (V_IH = 2.0 V min) and internal EPIC™ process are optimized for 5 V systems. Using 3.3 V violates recommended operating conditions and may result in unreliable logic levels, increased propagation delay, or failure to meet timing specs. For 3.3 V designs, consider the 74LVCH16374ADGG instead.

How does the flow-through pinout of SN74AHCT16374DGVR improve PCB layout?

The flow-through pinout places all D inputs on one side (e.g., pins 46–47, 44–43, etc.) and corresponding Q outputs on the opposite side (e.g., pins 2–3, 5–6, etc.), enabling direct, short, parallel traces between controller and peripheral. This reduces layer count, minimizes stubs and crosstalk, and simplifies length-matching for timing-critical 16-bit buses - directly improving signal integrity and easing compliance with high-speed layout guidelines.

Is SN74AHCT16374DGVR pin-compatible with other 48-pin Widebus™ devices?

SN74AHCT16374DGVR shares the same 48-pin TVSOP (DGV) mechanical footprint and pin spacing (0.4 mm) with other Widebus™ devices in the DGV package, such as SN74AHCT16244DGVR. However, pin functions differ significantly - clock, OE, and data/output assignments are unique to the 16374's dual 8-bit flip-flop architecture. Direct replacement requires full functional and timing validation; it is not a drop-in substitute for non-latching buffers or different register configurations.