Nexperia USA Inc. 74LVCH245APW,112

Overview

74LVCH245APW,112 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow control via DIR pin and active-low output enable (OE). It operates from 1.2 V to 3.6 V, supports 5.5 V-tolerant inputs, features bus hold on all data I/Os, and includes IOFF circuitry for partial power-down protection. It enables level translation between 3.3 V and 5 V domains in industrial control backplanes.

For engineers reviewing the 74LVCH245APW,112 datasheet, 74LVCH245APW,112 pinout, 74LVCH245APW,112 application, or 74LVCH245APW,112 equivalent, this device is selected for mixed-voltage bus interfacing where low static current, Schmitt-trigger noise immunity, and guaranteed high-impedance isolation during power sequencing are required.

Technical Context

This transceiver implements dual 8-bit bidirectional data paths with independent direction (DIR) and output-enable (OE) control logic. Its IOFF circuit ensures zero backflow current when VCC = 0 V, satisfying JEDEC JESD78 Class II latch-up immunity requirements.

Schmitt-trigger inputs provide hysteresis of ≥0.3 V at VCC = 3.3 V, enabling robust operation with slow-rising signals. Bus hold circuitry maintains last valid logic state on A/B data lines without external pull resistors, reducing BOM count in floating-bus applications.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-pin, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bus transceiver applications.

Compared with SN74LVC245APWR and 74ALVC245PW,118, the 74LVCH245APW,112 uniquely combines bus hold, 5.5 V tolerance, and ultra-low IOFF leakage-making it optimal for thermally constrained, mixed-voltage industrial systems requiring zero-BOM signal integrity.

Availability

74LVCH245APW,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, embedded memory expansion, and test equipment digital I/O cards requiring stable component supply across extended temperature ranges.

Supply support for 74LVCH245APW,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

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and automotive applications.

The 74LVCH series targets mixed-voltage system interfacing, emphasizing robustness in harsh environments through IOFF, bus hold, and extended temperature qualification up to +125 °C.

FAQ

Can 74LVCH245APW,112 operate with VCC = 1.2 V while accepting 5 V inputs?

Yes. The device is fully specified down to 1.2 V VCC and guarantees 5.5 V input tolerance regardless of supply voltage. Input clamping diodes safely shunt excess voltage to VCC or GND, and the internal logic remains functional at minimum VCC with VIH/VIL thresholds scaling proportionally.

What is the function of the exposed pad on the TSSOP20 package?

The exposed pad in SOT360-1 is non-electrical and mechanically optional. Nexperia documentation explicitly states it has no electrical or mechanical requirement to be soldered. If soldered, it must remain floating or connect only to GND-never to VCC or signal nets-to avoid parasitic coupling or thermal stress.

How does bus hold behave when OE = HIGH and DIR is toggled?

When OE = HIGH, all A/B outputs are in high-impedance state, but bus hold remains active on all data pins (A0–A7, B0–B7). Toggling DIR has no effect on I/O states-only OE controls output enable. Bus hold sustains the last driven logic level on each pin independently, preventing floating nodes during configuration changes.

Is IOFF functionality dependent on OE or DIR pin states?

No. IOFF activates automatically whenever VCC drops below ~0.2 V, regardless of OE or DIR logic levels. It disables all output drivers and isolates A/B ports from each other and from GND/VCC, preventing back-current even if OE = LOW and DIR is asserted during power collapse.