Nexperia USA Inc. 74ALVCH16245DL,118

Overview

74ALVCH16245DL,118 from Nexperia is a 16-bit CMOS bus transceiver with dual 8-bit sections, active-low 3-state outputs, Schmitt-trigger inputs, and integrated bus-hold circuitry on all data I/Os. It operates from 1.2 V to 3.6 V, supports bidirectional data flow under independent DIR/OE control per section, and features IOFF partial power-down protection. It is used in high-density PCB interconnects between FPGAs and memory subsystems requiring noise-immune level translation.

For engineers reviewing the 74ALVCH16245DL,118 datasheet, 74ALVCH16245DL,118 pinout, 74ALVCH16245DL,118 application, or 74ALVCH16245DL,118 equivalent, key selection criteria include bus-hold functionality, 24 mA drive strength at 3.0 V, TSSOP48 package thermal performance, and compatibility with mixed-voltage 1.8 V/2.5 V/3.3 V logic domains.

Technical Context

This transceiver implements two independent 8-bit bidirectional data paths, each controlled by dedicated direction (1DIR/2DIR) and output enable (1OE/2OE) pins. Its bus-hold circuitry actively maintains valid logic states on floating data inputs without external resistors, eliminating design overhead in unterminated stubs or hot-swap scenarios.

The device uses CMOS technology with IOFF circuitry that disables outputs during power-down to prevent backflow current, and Schmitt-trigger inputs ensure robust operation with slow-rising signals up to 10 ns/V input transition rate at 3.3 V. Propagation delay is as low as 1.9 ns typical at VCC = 3.3 V with 50 pF load.

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, designed for high-density PCB layouts with low inductance VCC/GND pin distribution.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH16245DGGR and 74LVC16245APAG, the 74ALVCH16245DL,118 uniquely combines bus-hold, IOFF, and full 1.2 V–3.6 V operation in a pin-identical footprint-enabling lower-risk, higher-integration designs in mixed-voltage embedded systems.

Availability

74ALVCH16245DL,118 is available at Aetrix Electronics and suitable for FPGA interconnects, memory subsystem buffering, hot-swappable backplane interfaces, and industrial PLC I/O expansion requiring stable component supply and long-term lifecycle support.

Supply support for 74ALVCH16245DL,118 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, reliable logic, analog, and MOSFET solutions for automotive, industrial, and consumer applications.

The 74ALVCH series targets high-speed, low-voltage digital interfacing in space- and power-constrained systems, emphasizing bus integrity, mixed-voltage compatibility, and robustness in harsh environments.

FAQ

Does the 74ALVCH16245DL,118 support 1.2 V operation with full timing guarantees?

Yes. The device is fully specified from 1.2 V to 3.6 V, with static and dynamic parameters-including propagation delay, drive strength, and bus-hold current-guaranteed across the entire range per Table 5 and Table 6 of the Rev. 8 datasheet. At 1.2 V, typical tpd is 3.7 ns (CL = 30 pF), and output drive is ±12 mA.

Can both 8-bit sections operate independently with different direction settings?

Yes. Section 1 (1A/1B) and Section 2 (2A/2B) have separate DIR and OE pins (1DIR/1OE and 2DIR/2OE). This allows concurrent bidirectional operation-for example, 1A→1B while 2B→2A-enabling asymmetric data flow in multi-protocol interfaces.

What is the maximum capacitive load this transceiver can drive reliably?

The device is characterized up to 50 pF load capacitance (Table 7), with guaranteed tpd ≤3.0 ns at VCC = 3.3 V. For loads exceeding 50 pF, rise/fall times increase linearly; the 24 mA drive capability supports stable operation on 50 Ω transmission lines, but PCB trace impedance matching remains critical above 30 pF.

How does the bus-hold circuit interact with externally pulled signals?

Bus-hold activates only when the input is floating (no external DC path). If an external resistor pulls the line HIGH or LOW, the bus-hold current (±75–175 μA) is overdriven and has no effect. It engages automatically when the driving source is disconnected or tri-stated, holding the last valid logic state.