Nexperia USA Inc. 74LVCH16245ABX,518

Overview

74LVCH16245ABX,518 from Nexperia is a 16-bit CMOS bus transceiver with dual 8-bit directional control (1DIR/2DIR), dual 3-state output enables (1OE/2OE), 5 V-tolerant inputs, bus hold on all data I/Os, and operation from 1.2 V to 3.6 V supply. It functions as two independent 8-bit transceivers or one unified 16-bit bidirectional data path in mixed-voltage systems such as FPGA-to-ASIC interconnects, memory expansion buses, and industrial controller backplanes.

For engineers reviewing the 74LVCH16245ABX,518 datasheet, 74LVCH16245ABX,518 pinout, 74LVCH16245ABX,518 application, or 74LVCH16245ABX,518 equivalent, this device delivers verified 5 V tolerance on all inputs, guaranteed bus hold functionality eliminating external pull-ups, IOFF-enabled partial power-down protection, Schmitt-trigger input noise immunity, and JEDEC-compliant operation across -40 °C to +125 °C.

Technical Context

This transceiver implements dual independent 8-bit bidirectional data channels, each controlled by dedicated DIR and OE signals-enabling asymmetric enable timing and direction sequencing critical for burst-mode memory interfaces and multi-master bus arbitration. Its bus hold circuit sustains logic states at data pins without external resistors, reducing BOM count and PCB area.

The IOFF feature actively disables outputs during power-down, blocking reverse current flow between powered and unpowered domains-a requirement for hot-swap and partial-power-down system architectures. Inputs accept 0–5.5 V regardless of VCC level, enabling seamless interfacing between 3.3 V logic and legacy 5 V peripherals.

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 74LVC16245ADGG, the 74LVCH16245ABX,518 adds bus hold to reduce component count and improve reliability in floating-bus scenarios; compared with SN74LVC16245ADGGR, it offers broader temperature qualification and superior ESD robustness for harsh environments.

Availability

74LVCH16245ABX,518 is available at Aetrix Electronics and suitable for industrial automation, medical imaging subsystems, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVCH16245ABX,518 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, automotive, and consumer applications.

The 74LVCH series targets mixed-voltage system interfacing, emphasizing robustness, low power, and design simplicity through integrated features like bus hold and IOFF-specifically engineered for next-generation embedded controllers and modular electronics.

FAQ

Does 74LVCH16245ABX,518 support true 5 V operation?

No-it operates from 1.2 V to 3.6 V VCC, but all inputs tolerate up to 5.5 V regardless of supply voltage. This enables safe interfacing with 5 V peripherals while maintaining low-power 3.3 V core logic, confirmed in Table 5 (Recommended Operating Conditions) and Section 1 (General Description).

How does bus hold function differ between 74LVCH16245ABX,518 and 74LVC16245A variants?

Only the 'H' suffix (74LVCH16245A) includes bus hold on all 16 data I/O pins; standard 74LVC16245A lacks this feature. Bus hold sustains last-valid logic state with ±75 μA current (Table 6), eliminating external pull resistors-explicitly stated in Section 1 and Table 2 footnote [4].

Can 1OE and 2OE be tied together for single-enable operation?

Yes-both OE inputs are electrically identical and may be paralleled to simplify control logic. However, doing so forfeits independent 8-bit channel gating, which is used in burst-mode memory access and partial bus isolation-documented in the Functional Diagram (Fig. 1) and Function Table (Table 3).

What is the thermal derating behavior for TSSOP48 package at elevated temperatures?

For SOT362-1 (TSSOP48), total power dissipation derates linearly at 12.2 mW/K above 109 °C, limiting usable power at +125 °C ambient. This is specified in Table 4 (Limiting Values) footnote [3], and applies to continuous operation under worst-case junction temperature conditions.