NXP Semiconductors 74LVCH16245ABQ,518

Overview

74LVCH16245ABQ,518 from NXP Semiconductors is a 16-bit non-inverting 3-state bus transceiver with dual direction (nDIR) and dual output enable (nOE) controls, bus hold on all data inputs, 5 V tolerant I/O, and operation from 1.2 V to 3.6 V supply. It supports bidirectional data flow between two 8-bit buses or one 16-bit bus in mixed-voltage systems such as FPGA-to-ASIC interconnects.

For engineers reviewing the 74LVCH16245ABQ,518 datasheet, 74LVCH16245ABQ,518 pinout, 74LVCH16245ABQ,518 application, or 74LVCH16245ABQ,518 equivalent, key selection criteria include bus hold functionality, 5 V tolerance with 1.2 V–3.6 V VCC, HXQFN60U thermal performance, and −40 °C to +125 °C industrial temperature range.

Technical Context

This device implements dual independent 8-bit transceiver blocks, each with dedicated nDIR and nOE inputs enabling flexible cascading and directional control. The bus hold circuit on all data inputs (A0–A7, B0–B7) maintains valid logic states without external pull-ups, reducing BOM count and board space.

It operates across a wide VCC range (1.2 V–3.6 V) while maintaining 5 V tolerance on all I/O pins-enabling direct interfacing between 3.3 V logic and legacy 5 V peripherals. Propagation delay is as low as 1.0 ns at VCC = 3.3 V, supporting high-speed parallel bus applications up to ~200 MHz effective throughput.

Key Specifications

Pinout & Package

74LVCH16245ABQ,518 uses the HXQFN60U package (SOT1134-1): 60-terminal, 4 mm × 6 mm × 0.5 mm thermal-enhanced quad flat no-lead package with exposed thermal pad. Pin numbering follows standard top-view orientation with terminal 1 indexed at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADGGR and 74ALVC16245PW,118, the 74LVCH16245ABQ,518 uniquely combines bus hold, HXQFN60U thermal efficiency, and full 1.2 V–3.6 V operation-making it optimal for space-constrained, mixed-voltage, high-reliability embedded designs.

Availability

74LVCH16245ABQ,518 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, FPGA interface design, and test equipment requiring stable component supply across extended temperature ranges.

Supply support for 74LVCH16245ABQ,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

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74LVCH16245ABQ,518 belongs to NXP's LVC/LVCH logic family, engineered for low-voltage, high-speed, mixed-signal interfacing in space- and power-constrained embedded systems.

FAQ

What is the function of the bus hold feature in the 74LVCH16245ABQ,518?

The bus hold feature in the 74LVCH16245ABQ,518 actively maintains the last-valid logic state on all data inputs (1A0–1A7, 2A0–2A7, 1B0–1B7, 2B0–2B7) using internal feedback circuitry. This eliminates the need for external pull-up or pull-down resistors on unused or unterminated bus lines, reducing component count, PCB area, and potential signal integrity issues caused by resistor parasitics. Bus hold current is ±75 μA at VCC = 3.0 V.

Can the 74LVCH16245ABQ,518 operate with a 1.8 V supply voltage?

Yes, the 74LVCH16245ABQ,518 is fully specified to operate across a VCC range of 1.2 V to 3.6 V, including 1.8 V. At 1.8 V, static parameters such as VIH (min 1.2 V), VIL (max 0.6 V), and dynamic performance (tpd ≤ 6.0 ns) remain guaranteed over the full −40 °C to +125 °C temperature range. This makes the 74LVCH16245ABQ,518 suitable for low-power portable and battery-operated systems.

Does the 74LVCH16245ABQ,518 support hot insertion in live backplanes?

Yes, the 74LVCH16245ABQ,518 supports hot insertion due to its 5 V tolerant I/O structure and high-impedance 3-state outputs when disabled. When VCC = 0 V, the device exhibits high-impedance I/O with ±10 μA power-off leakage, preventing back-driving of live buses. Inputs tolerate up to 5.5 V regardless of VCC state, and outputs withstand up to 5.5 V in 3-state mode-critical for safe hot-plug operation in modular systems.

How does the HXQFN60U package of the 74LVCH16245ABQ,518 improve thermal performance?

The HXQFN60U package (SOT1134-1) used by the 74LVCH16245ABQ,518 features an exposed thermal pad and optimized copper distribution that achieves a junction-to-board thermal resistance (θJB) of ≤ 15 °C/W. Combined with eight GND terminals and four VCC terminals, this reduces thermal impedance by ~40% versus TSSOP48 alternatives. The result is a 1000 mW total power dissipation rating at +125 °C ambient-enabling sustained 16-bit bus operation in thermally constrained enclosures.

Are the direction and output enable inputs of the 74LVCH16245ABQ,518 5 V tolerant?

No-only the data I/O pins (1A0–1A7, 2A0–2A7, 1B0–1B7, 2B0–2B7) are 5 V tolerant. The control inputs (1DIR, 2DIR, 1OE, 2OE) are CMOS inputs referenced to VCC and must not exceed VCC + 0.3 V. Applying 5 V to these pins while VCC = 3.3 V violates absolute maximum ratings and may cause latch-up or permanent damage. Proper level translation is required if controlling the 74LVCH16245ABQ,518 from a 5 V logic source.