Nexperia USA Inc. 74LVCH162245ADL,11

Overview

74LVCH162245ADL,11 from Nexperia is a 16-bit dual-directional bus transceiver with integrated 30 Ω series termination resistors, 5 V-tolerant I/O, and bus hold on all data inputs. It operates from 1.2 V to 3.6 V supply, supports mixed-voltage translation between 3.3 V and 5 V systems, and features two independent direction (1DIR/2DIR) and output enable (1OE/2OE) controls for flexible 8-bit or 16-bit data flow in high-speed parallel buses.

For engineers reviewing the 74LVCH162245ADL,11 datasheet, 74LVCH162245ADL,11 pinout, 74LVCH162245ADL,11 application, or 74LVCH162245ADL,11 equivalent, this device is selected for robust signal integrity in DDR memory interfaces, FPGA-to-ASIC interconnects, and industrial backplane buses where IOFF power-down protection, Schmitt-trigger noise immunity, and termination-matched drive are required.

Technical Context

This transceiver implements dual 8-bit flow-through architecture with separate DIR/OE control per byte lane, enabling asymmetric bidirectional data routing without external logic. Its IOFF circuitry actively disables outputs during partial power-down, blocking backflow current when VCC = 0 V - critical for hot-swap and power-gated subsystems.

All 32 data I/O pins (1A0–1A7, 1B0–1B7, 2A0–2A7, 2B0–2B7) include bus hold functionality (74LVCH variant only), eliminating external pull-ups on unused lines. Schmitt-trigger inputs tolerate slow-rising signals up to 20 ns/V at 1.2 V, while integrated 30 Ω series resistors dampen reflections on PCB traces up to 150 MHz.

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, exposed thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH162245ADL,11, the 74LVC162245ADGG saves ~2 μA static current but adds design overhead for pull-up management, while the SN74LVC162245ADGGR offers identical functionality with minor timing variances and distinct qualification documentation - making the Nexperia LVCH variant optimal for bus-hold-reliant, mixed-voltage industrial systems.

Availability

74LVCH162245ADL,11 is available at Aetrix Electronics and suitable for DDR memory interfaces, FPGA-to-ASIC interconnects, and industrial backplane buses requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across temperature extremes.

Supply support for 74LVCH162245ADL,11 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVCH162245A belongs to Nexperia's LVC/LVCH advanced logic family, engineered specifically for noise-immune, low-power, mixed-voltage bus interfacing in space-constrained industrial and communications equipment.

FAQ

What is the function of the bus hold circuit in the 74LVCH162245ADL,11?

The bus hold circuit actively maintains the last-valid logic state on each data input (1A0–1A7, 1B0–1B7, 2A0–2A7, 2B0–2B7) when the pin is left unconnected or driven high-impedance. It draws ±10 μA to ±75 μA depending on voltage and state, eliminating the need for external pull-up or pull-down resistors and preventing floating inputs from causing metastability or increased power consumption.

Can the 74LVCH162245ADL,11 operate with a 1.2 V supply and still interface with 5 V signals?

Yes - the device supports VCC from 1.2 V to 3.6 V and tolerates input voltages up to 5.5 V regardless of supply level. When VCC = 1.2 V, inputs can accept 0 V to 5.5 V, and outputs drive to valid HIGH/LOW levels referenced to the 1.2 V rail. This enables true 5 V-to-1.2 V translation without external level shifters, verified per JEDEC JESD8-7A compliance.

How does the IOFF feature protect the device during partial power-down?

When VCC drops to 0 V, the IOFF circuitry forces all outputs into high-impedance state and limits leakage current to ±10 μA maximum. This prevents backflow current from externally powered buses (e.g., 5 V backplane) into the unpowered device, avoiding latch-up, overheating, or damage to adjacent powered ICs - a requirement for hot-swap and modular power architectures.

What is the significance of the 30 Ω series termination resistors?

The integrated 30 Ω resistors are placed in series with each I/O pin to match typical PCB trace impedances (40–70 Ω) and dampen signal reflections at high frequencies. Measured propagation delay remains ≤8.5 ns, confirming minimal impact on timing while reducing EMI and overshoot - particularly beneficial for DDR, parallel flash, and FPGA configuration buses operating above 100 MHz.