Texas Instruments SN74LVC374APWT

Overview

SN74LVC374APWT from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features 8-bit data latching on CLK rising edge, independent output-enable (OE) control, 5.5-V-tolerant inputs, and supports mixed-voltage interfacing in 3.3-V/5-V systems - used in bus interface, I/O port expansion, and register buffering applications.

For engineers reviewing the SN74LVC374APWT datasheet, SN74LVC374APWT pinout, SN74LVC374APWT application, or SN74LVC374APWT equivalent, key selection criteria include tpd ≤ 7.6 ns at 3.3 V, Ioff-enabled live insertion, 32-mA drive capability, and TSSOP-20 package compatibility with high-density PCB layouts.

Technical Context

This device implements eight independent D-type flip-flops, each synchronized to the rising edge of CLK. Output states are controlled by OE: logic-high enables normal Q outputs (high/low), while logic-low forces all eight outputs into high-impedance mode without affecting internal latch operation.

It supports partial-power-down via Ioff, which disables outputs and blocks current backflow when VCC = 0 V. Input voltage tolerance up to 5.5 V allows direct interfacing with 5-V logic while operating at 1.65–3.6 V VCC - enabling level translation without external components.

Key Specifications

Pinout & Package

TSSOP-20 package (4.4 mm × 6.5 mm, 0.65 mm pitch), thermally enhanced with exposed pad option (not applicable to SN74LVC374APWT per TI orderable addendum); RoHS-compliant, NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop applications.

Compared with SN74LVC574APW and 74LVC374PW,118, the SN74LVC374APWT provides unified 8-bit OE control and full –40°C to +85°C qualification - making it optimal for single-bus latching where thermal margin and simplicity outweigh per-group flexibility.

Availability

SN74LVC374APWT is available at Aetrix Electronics and suitable for industrial I/O expansion, embedded bus interface, server baseboard management, and consumer infotainment applications requiring stable component supply and long-term lifecycle support.

Supply support for SN74LVC374APWT 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 over 50 years of innovation in high-reliability digital interfaces.

The SN74LVC374APWT belongs to TI's LVC logic family, engineered for low-voltage, high-speed, mixed-signal interfacing in space-constrained industrial and computing systems.

FAQ

What is the maximum clock frequency supported by the SN74LVC374APWT?

The SN74LVC374APWT supports up to 100 MHz at VCC = 3.3 V and TA ≤ 85°C, and up to 95 MHz at VCC = 2.5 V under the same conditions. At VCC = 1.8 V and TA = 85°C, the maximum frequency drops to 55 MHz. These values are specified in the SN74LVC374A switching characteristics tables and reflect guaranteed timing performance across temperature and voltage corners.

Does the SN74LVC374APWT support hot-swap or live-insertion applications?

Yes, the SN74LVC374APWT supports live insertion via its Ioff feature, which disables outputs and blocks current backflow when VCC = 0 V. This protects upstream circuitry during hot-plug events. TI specifies Ioff ≤ ±20 μA at VI/VO = 5.5 V, meeting JEDEC JESD78 requirements for partial-power-down robustness - a key design requirement for the SN74LVC374APWT in modular systems.

Can the SN74LVC374APWT interface directly with 5-V logic inputs?

Yes, the SN74LVC374APWT accepts input voltages up to 5.5 V regardless of VCC level (1.65 V to 3.6 V), enabling direct connection to 5-V TTL or CMOS outputs without level-shifting circuitry. This overvoltage tolerance is explicitly guaranteed in the Electrical Characteristics table and applies to all D, CLK, and OE inputs - a defining capability of the SN74LVC374APWT in mixed-voltage systems.

What is the output drive strength of the SN74LVC374APWT at 3.3 V?

At VCC = 3.3 V, the SN74LVC374APWT delivers ±24 mA per output (IOL/IOH), with a total device limit of ±50 mA. This high drive strength allows it to source/sink ≥10 LVC loads or directly drive LEDs, small relays, or optocouplers - significantly exceeding standard LVTTL or LVCMOS drivers and reducing bill-of-materials count in the SN74LVC374APWT's target applications.

Is the SN74LVC374APWT pin-compatible with other TSSOP-20 octal flip-flops?

Yes, the SN74LVC374APWT is pin-compatible with TI's SN74LVC574APW and SN74LV374APW in the TSSOP-20 package, sharing identical pin functions and spacing. However, functional differences exist: SN74LVC574APW splits OE control across two 4-bit groups, while SN74LV374APW operates only down to 2.7 V. The SN74LVC374APWT remains the only variant supporting full 1.65–3.6 V operation with unified 8-bit OE in this footprint.