Texas Instruments SN74ALVC16374DGGR

Overview

SN74ALVC16374DGGR from Texas Instruments is a 16-bit edge-triggered D-type flip-flop designed for 3.3-V operation, featuring dual 8-bit sections with independent clock and output-enable controls, ±24-mA drive strength at 3.0 V, bus-hold circuitry on all data inputs, and operation across −40°C to 85°C. It serves as a bidirectional bus register in high-speed digital systems requiring level translation and noise-immune data latching.

For engineers reviewing the SN74ALVC16374DGGR datasheet, SN74ALVC16374DGGR pinout, SN74ALVC16374DGGR application, or SN74ALVC16374DGGR equivalent, key selection criteria include 3.3-V supply compatibility, 150-MHz maximum clock frequency, dual OE-controlled 8-bit output banks, bus-hold input retention, and TSSOP-48 thermal and layout constraints.

Technical Context

This device implements two independent 8-bit positive-edge-triggered D flip-flop banks sharing no internal logic coupling-each bank has dedicated CLK and OE pins enabling asynchronous enable/disable control per group. The EPIC™ submicron CMOS process delivers low ground bounce (VOLP < 0.8 V) and undershoot immunity (VOHV > 2 V), critical for clean signal integrity in dense PCB layouts.

Bus-hold circuitry actively maintains valid logic levels on unused D inputs without external resistors, while output drivers support hot-swap–capable high-impedance states with fast enable/disable timing (tdis ≤ 4.3 ns, ten ≤ 4.8 ns at 3.3 V). All I/Os tolerate 0–VCC input voltage and support mixed-voltage interfacing within absolute ratings.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5-mm lead pitch, gull-wing leads, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit latch/register applications.

Compared with SN74ALVC16374DGGR, SN74LVC16374DGGR removes bus-hold and reduces 2.5-V margin, while 74ALVCH16374TTR adds power-down capability but trades off noise immunity-making SN74ALVC16374DGGR optimal for industrial bus integrity where floating inputs and ground bounce are primary concerns.

Availability

SN74ALVC16374DGGR is available at Aetrix Electronics and suitable for industrial I/O expansion, memory interface buffering, FPGA configuration hold, and backplane data synchronization requiring stable component supply and long-term obsolescence management.

Supply support for SN74ALVC16374DGGR 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions with global manufacturing and distribution infrastructure.

The SN74ALVC16374DGGR belongs to TI's ALVC (Advanced Low-Voltage CMOS) logic family, engineered for high-speed 3.3-V digital systems requiring robust noise immunity, bus-hold stability, and industrial temperature operation.

FAQ

What is the maximum clock frequency supported by the SN74ALVC16374DGGR?

The SN74ALVC16374DGGR supports a maximum clock frequency of 150 MHz across its full operating temperature range (−40°C to +85°C) and supply voltage range (2.3 V to 3.6 V), as verified under standard test conditions with 50-pF load and 10-MHz input frequency. This rating applies independently to both 8-bit banks, enabling concurrent high-speed data capture in dual-channel architectures. The SN74ALVC16374DGGR achieves this performance using TI's EPIC™ submicron CMOS process, which minimizes internal propagation delay and clock-to-output skew.

Does the SN74ALVC16374DGGR require external pull-up or pull-down resistors on its data inputs?

No, the SN74ALVC16374DGGR does not require external pull-up or pull-down resistors on its data inputs because it integrates active bus-hold circuitry on all 16 D inputs. This feature maintains the last valid logic level at each input when left floating, preventing undefined states during power-up, bus release, or signal contention. The bus-hold current is specified at ±75 µA at 3.0 V, ensuring reliable retention without loading the driving source. This capability is intrinsic to the SN74ALVC16374DGGR and requires no configuration or external components.

What is the purpose of the OE pins on the SN74ALVC16374DGGR?

The SN74ALVC16374DGGR features two independent active-low output-enable pins-1OE and 2OE-that place the corresponding 8-bit output banks (1Q1–1Q8 and 2Q1–2Q8) into a high-impedance state without affecting internal latch operation. When asserted low, outputs disconnect from the bus, eliminating loading and enabling safe multi-driver arbitration. When deasserted high, outputs drive normal logic levels synchronized to their respective CLK edges. Critically, OE has no effect on internal flip-flop state-data can be latched or retained while outputs remain tri-stated. This behavior is confirmed in the SN74ALVC16374DGGR function table and timing diagrams.

Can the SN74ALVC16374DGGR operate at 2.5 V supply voltage?

Yes, the SN74ALVC16374DGGR is fully characterized and guaranteed to operate at 2.5 V supply voltage, as explicitly stated in the "Recommended Operating Conditions" table of its datasheet. At 2.5 V, it supports 150-MHz clock frequency, meets all AC timing specifications (including t_su = 2.1 ns and t_pd = 5.9 ns), and delivers ±12-mA output drive. The device is tested across 2.5 V, 2.7 V, and 3.3 V during production, making the SN74ALVC16374DGGR suitable for mixed-voltage systems where 2.5-V logic domains interface with 3.3-V peripherals.

Is the SN74ALVC16374DGGR pin-compatible with other 48-pin TSSOP 16-bit latches?

The SN74ALVC16374DGGR is pin-compatible with the SN74LVC16374DGGR in the same TSSOP-48 (DGG) package-both share identical pin assignments for power, ground, clocks, enables, data inputs, and registered outputs. However, it is not pin-compatible with non-TI 48-pin latches such as the 74ALVCH16374TTR, which uses a different pinout despite identical package dimensions and I/O count. Pin compatibility is limited to TI's ALVC/LVC 16374 variants; always verify against the specific device's top-marking and pin diagram before substitution. The SN74ALVC16374DGGR datasheet confirms this mapping in its "DGG OR DL PACKAGE (TOP VIEW)" diagram.