Texas Instruments SN74LVC374AQPWRQ1

Overview

SN74LVC374AQPWRQ1 from Texas Instruments is an automotive-qualified octal edge-triggered D-type flip-flop with 3-state outputs, operating from 2 V to 3.6 V, featuring 8.5 ns max propagation delay at 3.3 V, ±24 mA output drive, and Ioff partial-power-down support. It serves as a bus interface register in automotive infotainment and ADAS domain controllers.

For engineers reviewing the SN74LVC374AQPWRQ1 datasheet, SN74LVC374AQPWRQ1 pinout, SN74LVC374AQPWRQ1 application, or SN74LVC374AQPWRQ1 equivalent, key selection criteria include its 20-pin TSSOP package, mixed-mode 5-V/3.3-V signal translation capability, high-impedance output control via OE, and AEC-Q100 Grade 1 qualification for under-hood environments.

Technical Context

This device implements eight independent positive-edge-triggered D flip-flops, each with asynchronous 3-state output control via a shared OE input. Its Ioff circuitry disables outputs during power-down to prevent backflow current, and inputs tolerate up to 5.5 V regardless of VCC level.

The logic diagram confirms that CLK transitions capture D-input states into Q outputs, while OE independently gates all eight outputs into high-impedance without affecting internal latch operation. Timing parameters are specified across –40°C to 125°C, with tpd = 8.5 ns (max) and tsu/th = 2 ns / 1.5 ns at VCC = 3.3 V.

Key Specifications

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body, 0.65 mm 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 applications.

Compared with SN74LVC374APWRE4, the SN74LVC374AQPWRQ1 adds guaranteed operation at 125°C and automotive stress testing; versus SN74LVCH16374APAG, it offers smaller footprint and lower power but half the channel count-making it optimal for space-constrained, thermally demanding automotive modules.

Availability

SN74LVC374AQPWRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, ADAS sensor interfaces, and infotainment I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC374AQPWRQ1 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, personal electronics, and communications markets.

The SN74LVC374A-Q1 belongs to TI's automotive logic portfolio, designed specifically to meet AEC-Q100 reliability standards and support functional safety requirements in vehicle domain controllers and distributed ECUs.

FAQ

What is the maximum clock frequency supported by SN74LVC374AQPWRQ1?

The SN74LVC374AQPWRQ1 supports a maximum clock frequency of 100 MHz at VCC = 3.3 V and TA = 25°C, with minimum pulse width of 3.3 ns for both high and low CLK states. This specification is validated across the full –40°C to 125°C operating range, making SN74LVC374AQPWRQ1 suitable for high-speed automotive serial bus synchronization and real-time sensor sampling applications.

Does SN74LVC374AQPWRQ1 support partial power-down operation?

Yes, SN74LVC374AQPWRQ1 includes Ioff circuitry that disables all outputs when VCC = 0 V, limiting reverse current to less than 10 µA. This feature enables safe partial-power-down operation in automotive domain controllers where individual subsystems may be powered on/off independently, preventing damaging current backflow through SN74LVC374AQPWRQ1 during power sequencing events.

Can SN74LVC374AQPWRQ1 interface directly between 5-V and 3.3-V logic domains?

Yes, SN74LVC374AQPWRQ1 accepts input voltages up to 5.5 V while operating from a 2–3.6 V VCC supply, enabling direct 5-V-to-3.3-V signal translation without external level shifters. This mixed-mode capability is confirmed across all eight D inputs and the OE and CLK pins, making SN74LVC374AQPWRQ1 ideal for bridging legacy 5-V sensors to modern 3.3-V automotive SoCs.

What is the recommended OE pin configuration during power-up for SN74LVC374AQPWRQ1?

To ensure outputs remain in high-impedance during power-up, OE should be tied to VCC through a pullup resistor; TI specifies a minimum resistance determined by the driving source's current-sinking capability. For SN74LVC374AQPWRQ1, a 10-kΩ pullup is commonly used, guaranteeing Z-state entry before internal logic stabilizes and preventing bus conflicts during cold start sequences in automotive ECUs.

Is SN74LVC374AQPWRQ1 pin-compatible with other members of the SN74LVC374A family?

Yes, SN74LVC374AQPWRQ1 shares identical pinout and functionality with SN74LVC374AQDWRQ1 (SOIC-20) and SN74LVC374APWRE4 (commercial TSSOP-20). All variants use the same 20-pin layout, timing behavior, and electrical characteristics-enabling drop-in replacement across packages when thermal or board-space constraints dictate package selection without modifying schematic or layout.