Nexperia USA Inc. 74ALVCH16501DL,112

Overview

74ALVCH16501DL,112 from Nexperia is an 18-bit universal bus transceiver with dual-directional data flow control, bus hold inputs, and 3-state non-inverting outputs. It supports transparent, latched, and clocked operation modes across 1.2 V to 3.6 V supply range, delivers ±24 mA drive at 3.0 V, and features IOFF partial power-down protection. Used in high-density memory/data bus interfacing between heterogeneous logic domains.

For engineers reviewing the 74ALVCH16501DL,112 datasheet, 74ALVCH16501DL,112 pinout, 74ALVCH16501DL,112 application, or 74ALVCH16501DL,112 equivalent, key selection considerations include bidirectional timing asymmetry (OEAB active-HIGH vs OEBA active-LOW), latch/clock input independence per direction, bus hold current specs (±75 μA at 3.0 V), IOFF-enabled hot-swap capability, and TSSOP56 thermal derating above 85 °C.

Technical Context

This device implements two independent 18-bit data paths-A-to-B and B-to-A-with separate output enables (OEAB active-HIGH, OEBA active-LOW), latch enables (LEAB/LEBA), and clocks (CPAB/CPBA). Each path operates in transparent mode when its LE is HIGH, latches on LE LOW + static CP level, or clocks on CP transition (LOW-to-HIGH for A→B).

Bus hold circuitry maintains valid logic states on all 36 data I/Os without external pull-ups; IOFF disables outputs during power-down to prevent backflow current. The design meets JEDEC JESD8-7/8-5/36 voltage standards and exceeds 100 mA latch-up immunity per JESD78 Class II.A.

Key Specifications

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, body width 6.1 mm, 0.5 mm pitch, 1.2 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVTH16501DGGR, the 74ALVCH16501DL,112 trades extended temperature and higher drive for integrated bus hold and IOFF - critical for industrial hot-swap and low-power standby. Versus 74LVC16501ADGG,112, it adds essential power-management features at identical cost, making it superior for modern mixed-voltage embedded designs.

Availability

74ALVCH16501DL,112 is available at Aetrix Electronics and suitable for memory expansion interfaces, processor bus bridging, hot-swappable backplane slots, and legacy-to-modern bridge modules requiring stable component supply across industrial temperature ranges and multi-voltage system integration.

Supply support for 74ALVCH16501DL,112 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 industrial, computing, and consumer markets.

The 74ALVCH series targets advanced low-voltage bus interface applications demanding wide supply range, robust ESD, and power-aware features like IOFF - optimized for space-constrained, multi-rail embedded systems.

FAQ

What is the functional difference between OEAB and OEBA?

OEAB is active-HIGH and controls A-to-B output drivers, while OEBA is active-LOW and controls B-to-A drivers. This complementary polarity allows independent, asynchronous enable/disable of each data path - for example, holding B-bus outputs active while tri-stating A-bus outputs during a read-modify-write cycle. Both inputs are referenced to the same VCC rail and share identical timing specifications.

Can the 74ALVCH16501DL,112 operate reliably at 1.2 V supply?

Yes - it is fully specified from 1.2 V to 3.6 V per JEDEC standards. At 1.2 V, propagation delay increases to ≤5.1 ns (typical 2.8 ns), and output drive drops to ±8 mA, but all logic thresholds, bus hold functionality, and IOFF behavior remain guaranteed across −40 °C to +85 °C. Static characteristics tables confirm VIH/VIL margins are maintained even at minimum VCC.

How does the bus hold circuit interact with external pull-up resistors?

The internal bus hold circuit provides ~75 μA weak hold current at 3.0 V and overrides external pull-up/down resistors stronger than ~67 kΩ. If external resistors are used, they must be >100 kΩ to avoid conflict; otherwise, bus hold is disabled by external bias. Designers should either rely solely on internal bus hold or remove it entirely via PCB layout - mixing both causes undefined DC conditions.

Is the TSSOP56 package lead-free and RoHS compliant?

Yes - the 74ALVCH16501DL,112 in SOT364-1 (TSSOP56) package is manufactured with 100 % matte tin lead finish and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Lead-free soldering profiles follow IPC/JEDEC J-STD-020D.2 for MSL3 classification with floor life of 168 hours at ≤30 °C/60 % RH.