NXP Semiconductors 74LVT534PW,112

Overview

74LVT534PW,112 from NXP Semiconductors (formerly Philips) is a 3.3 V octal D-type inverting flip-flop with 3-State outputs, edge-triggered by rising clock transitions, featuring bus-hold inputs and common active-LOW output enable. It operates across –40 °C to +85 °C, delivers 3.0 ns typical tPLH at 3.3 V/50 pF, and supports 5 V-tolerant I/O for mixed-voltage bus interfacing in industrial control backplanes.

For engineers reviewing the 74LVT534PW,112 datasheet, 74LVT534PW,112 pinout, 74LVT534PW,112 application, or 74LVT534PW,112 equivalent, key selection criteria include its inverting 3-State Q outputs, bus-hold input retention without external pull-ups, power-up 3-State behavior, and compatibility with 5 V logic buses while powered from 3.3 V.

Technical Context

The 74LVT534PW,112 implements eight independent D-type latches synchronized to a single rising-edge clock (CP), each driving an inverting 3-State output buffer. Its BiCMOS architecture enables TTL-level input thresholds and 5 V-tolerant I/O while operating at 3.3 V supply, with bus-hold circuitry on all D inputs eliminating external biasing.

Output enable (OE) is asynchronous and active-LOW, disabling all eight outputs simultaneously into high-impedance state regardless of clock activity. Power-up reset ensures outputs enter 3-State mode before valid clock or data, and latch-up protection exceeds 500 mA per JEDEC Std 17.

Key Specifications

Pinout & Package

74LVT534PW,112 is housed in a 20-pin plastic TSSOP (Thin Shrink Small Outline Package), Type I, body width 4.4 mm (SOT360-1), suitable for high-density PCB layouts with fine-pitch routing.

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 74ALVCH162374T, the 74LVT534PW,112 uniquely combines inverting outputs, integrated bus-hold, 5 V-tolerant I/O, and guaranteed power-up 3-State-making it irreplaceable in legacy bus bridging and hot-swap industrial designs where input retention and voltage interoperability are mandatory.

Availability

74LVT534PW,112 is available at Aetrix Electronics and suitable for industrial backplane latching, legacy bus interface translation, modular PLC I/O expansion, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT534PW,112 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

NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-performance analog and logic ICs, with core expertise in automotive, industrial, and communication semiconductors.

The 74LVT family was engineered for 3.3 V bus-interface applications demanding 5 V compatibility, low skew, and robust ESD/latch-up performance-targeting industrial control, telecom infrastructure, and instrumentation systems.

FAQ

What is the function of the OE pin on the 74LVT534PW,112?

The OE (Output Enable) pin on the 74LVT534PW,112 is an active-LOW control that asynchronously places all eight Q outputs into high-impedance state when asserted HIGH. When OE is LOW, stored data appears at Q0–Q7; this operation is independent of the clock (CP) signal, enabling precise bus arbitration without clock synchronization overhead. The 74LVT534PW,112 uses OE to prevent bus contention in multi-driver systems.

Does the 74LVT534PW,112 support 5 V logic inputs while powered at 3.3 V?

Yes, the 74LVT534PW,112 supports 5 V-tolerant inputs: VI can range from –0.5 V to +7.0 V, and VIH/VIL thresholds (2.0 V/0.8 V) align with TTL logic levels. This allows direct connection to 5 V sources without external level shifters. The 74LVT534PW,112 maintains full DC and AC specifications under these conditions, verified per its recommended operating conditions table.

How does bus-hold functionality work on the 74LVT534PW,112 D inputs?

The 74LVT534PW,112 integrates bus-hold circuitry on all D0–D7 inputs, providing ±75 µA to ±150 µA overdrive current to retain the last valid logic state when inputs float. This eliminates external pull-up or pull-down resistors, reducing BOM cost and board space. Bus-hold behavior is specified across temperature and supply voltage, and is intrinsic to the 74LVT534PW,112's BiCMOS design.

What is the maximum clock frequency supported by the 74LVT534PW,112?

The 74LVT534PW,112 supports a maximum clock frequency of 100 MHz minimum over the full –40 °C to +85 °C range (fMAX = 100 MHz at VCC = 2.7 V). At VCC = 3.3 V, typical operation reaches 150 MHz. This is derived from AC characteristics specifying tPLH/tPHL ≤ 4.6 ns and tW(H)/tW(L) ≥ 1.5 ns, ensuring reliable edge-triggered capture in high-speed data acquisition and control loops using the 74LVT534PW,112.

Is the 74LVT534PW,112 pin-compatible with other 74LVT534 variants like 74LVT534D or 74LVT534DB?

Yes, the 74LVT534PW,112 shares identical pin configuration and electrical functionality with 74LVT534D (SOT163-1) and 74LVT534DB (SOT339-1), differing only in package type (TSSOP vs. SOL vs. SSOP). All three use the same 20-pin layout, pin functions, and logic behavior per the Philips datasheet. The 74LVT534PW,112 is mechanically distinct but electrically interchangeable in designs where footprint allows.