Nexperia USA Inc. 74LVCH16245AEV,157

Overview

74LVCH16245AEV,157 from Nexperia is a 16-bit CMOS bus transceiver with dual 8-bit directional control (1DIR/2DIR), dual 3-state output enables (1OE/2OE), 1.2 V to 3.6 V supply operation, and 5.5 V tolerant inputs - enabling bidirectional level translation between 3.3 V and 5 V buses in industrial I/O expansion and memory interface subsystems.

For engineers reviewing the 74LVCH16245AEV,157 datasheet, 74LVCH16245AEV,157 pinout, 74LVCH16245AEV,157 application, or 74LVCH16245AEV,157 equivalent, this device delivers verified bus hold on all data inputs, IOFF partial power-down protection, Schmitt-trigger input noise immunity, and guaranteed timing performance across -40 °C to +125 °C for mixed-voltage board-level interconnect design.

Technical Context

This transceiver implements two independent 8-bit bidirectional data paths, each with dedicated direction (DIR) and output enable (OE) controls, allowing flexible partitioning as either one 16-bit or two concurrent 8-bit interfaces. Its bus hold circuitry actively maintains logic states on unused data inputs without external pull-ups.

The IOFF feature disables outputs during power-down, blocking backflow current when VCC = 0 V, while Schmitt-trigger inputs tolerate slow-rising signals and suppress noise-induced glitches. Input voltage tolerance up to 5.5 V permits direct interfacing with legacy 5 V TTL or LVTTL sources regardless of VCC setting.

Key Specifications

Pinout & Package

TSSOP48 (SOT362-1) package: plastic thin shrink small outline, 48 leads, 6.1 mm body width, 0.5 mm lead pitch. Pin 1 index marked; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bidirectional bus transceiver applications.

Compared with SN74LVC16245ADGGR and 74ALVC16245PW,118, the 74LVCH16245AEV,157 uniquely combines bus hold, IOFF, wide VCC range, and 5.5 V tolerance - making it the only option supporting zero-resistor floating-input reliability and safe hot-swap operation across mixed-voltage embedded platforms.

Availability

74LVCH16245AEV,157 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, server memory expansion cards, and medical imaging data acquisition boards requiring stable component supply across extended temperature and mixed-voltage operating conditions.

Supply support for 74LVCH16245AEV,157 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, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and computing applications.

The 74LVCH series targets mixed-voltage digital interconnect in space-constrained, thermally demanding systems - emphasizing bus integrity, power-aware operation, and seamless integration with both legacy and next-generation logic families.

FAQ

Does 74LVCH16245AEV,157 support 1.2 V operation with full timing guarantees?

Yes. The device is fully characterized from 1.2 V to 3.6 V, with propagation delay specified at 13.0 ns (max) and enable/disable times at 15.0 ns (max) under 1.2 V operation per Table 7. All static parameters including VIH/VIL and VOH/VOL meet specifications across this full range.

How does the bus hold function interact with 5 V input signals?

The bus hold circuit is automatically disabled when any data input exceeds VCC, allowing safe 5.5 V signal application without contention or current injection. Bus hold remains active only when input voltage stays within VCC ±0.1 V, per datasheet note [2] in Section 9.

Can 1OE and 2OE be tied together for unified 16-bit control?

Yes. Pins 1OE (pin 48) and 2OE (pin 25) may be connected to a common enable signal. This configuration places all 16 outputs into high-impedance simultaneously, preserving the dual-port architecture while simplifying control logic in single-bus applications.

What is the thermal derating behavior for TSSOP48 package above 109 °C?

For SOT362-1 (TSSOP48), total power dissipation derates linearly at 12.2 mW/K above 109 °C ambient. At 125 °C, Ptot is reduced from 500 mW to approximately 295 mW - calculated as 500 mW − (12.2 mW/K × 16 K) = 304.8 mW, consistent with Table 4 limits.