Texas Instruments SN74LVC374AQPWREP

Overview

SN74LVC374AQPWREP from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2.0 V to 3.6 V operation and mixed-mode signal interfacing (5-V-tolerant inputs). It features 8 independent D-flip-flops, a common clock (CLK), active-low output-enable (OE), and operates up to 100 MHz at 3.3 V. It is used in bus interface logic, I/O port expansion, and bidirectional data buffering in industrial control systems.

For engineers reviewing the SN74LVC374AQPWREP datasheet, SN74LVC374AQPWREP pinout, SN74LVC374AQPWREP application, or SN74LVC374AQPWREP equivalent, key selection criteria include its 3.3-V supply compatibility, 5-V input tolerance, 8.5-ns max propagation delay, Ioff partial-power-down support, and TSSOP-20 packaging for high-density PCB layouts.

Technical Context

This device implements eight synchronous D-type latches triggered on the rising edge of CLK, with independent D inputs and Q outputs. Each output is controlled by a shared OE signal that places all eight outputs into high-impedance state without affecting internal latch states.

It supports mixed-voltage system interfacing: inputs tolerate up to 5.5 V regardless of VCC (2.0–3.6 V), enabling direct connection to legacy 5-V logic while operating from a 3.3-V rail. The Ioff feature disables outputs during power-down to prevent back-current flow, critical for hot-swap and partial-power-down architectures.

Key Specifications

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state output applications.

Compared with SN74LVC374APWRE4, the SN74LVC374AQPWREP offers guaranteed operation to +125°C and enhanced reliability screening-critical for mission-critical industrial and automotive deployments. Against SN74LVCH16374ADGGR, it trades channel density and input robustness for minimal footprint and direct 8-bit integration.

Availability

SN74LVC374AQPWREP is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC374AQPWREP 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The SN74LVC374AQPWREP belongs to TI's LVC logic family-designed for low-voltage, high-speed, mixed-signal interface applications with robust voltage translation and power-aware features like Ioff.

FAQ

What is the maximum clock frequency supported by SN74LVC374AQPWREP?

The SN74LVC374AQPWREP supports a maximum clock frequency of 100 MHz when operated at VCC = 3.3 V ± 0.3 V and TA = –40°C to +125°C. This rating is validated across the full temperature range and reflects worst-case timing performance under recommended operating conditions. The SN74LVC374AQPWREP achieves this speed while maintaining 8.5 ns max propagation delay and robust setup/hold margins.

Does SN74LVC374AQPWREP support partial power-down operation?

Yes, SN74LVC374AQPWREP includes Ioff circuitry that disables all outputs when VCC = 0 V, preventing damaging current backflow from powered I/O lines into the unpowered device. This feature is fully specified and tested per JEDEC standards, making SN74LVC374AQPWREP suitable for hot-swap, modular backplane, and battery-backed subsystem designs where power sequencing is asymmetric.

Can SN74LVC374AQPWREP interface directly with 5-V logic inputs?

Yes, SN74LVC374AQPWREP accepts input voltages up to 5.5 V on all data (D), clock (CLK), and output-enable (OE) pins-even when VCC is as low as 2.0 V. This 5-V-tolerant input capability allows direct connection to legacy 5-V CMOS/TTL outputs without external level shifters, simplifying mixed-voltage system design and reducing BOM count. The SN74LVC374AQPWREP maintains full logic functionality and timing specifications under this condition.

What is the recommended OE pin handling during power-up and power-down sequences?

To ensure outputs remain in high-impedance state during power transitions, OE should be tied to VCC through a pullup resistor. TI specifies a minimum resistor value based on the driver's current-sinking capability-typically 10 kΩ suffices for most microcontroller-driven OE signals. This prevents bus contention during brown-out or staggered power sequencing. The SN74LVC374AQPWREP's internal OE logic remains functional across the full VCC range (2.0–3.6 V), so no additional biasing is needed once stable.

Is SN74LVC374AQPWREP pin-compatible with standard SN74LVC374A variants?

Yes, SN74LVC374AQPWREP shares identical pinout, electrical behavior, and functional logic with the commercial SN74LVC374APWRE4 and catalog SN74LVC374APWR, all in TSSOP-20 (PW) package. Differences are limited to temperature grading (–40°C to +125°C), enhanced reliability screening, and extended product lifecycle support-not physical or logical interface. Engineers may substitute SN74LVC374AQPWREP into existing designs using SN74LVC374A footprints without layout changes.