Nexperia USA Inc. 74ALVCH16646DGG:11

Overview

74ALVCH16646DGG:11 from Nexperia is a 16-bit non-inverting bus transceiver/register with 3-state outputs, dual D-type flip-flop registers per port, and multiplexed real-time/registered data routing. It operates from 2.3 V to 3.6 V, supports −40 °C to +85 °C ambient, and delivers ±24 mA output drive at 3.0 V - used in high-density memory expansion and multi-bus system interconnects.

For engineers reviewing the 74ALVCH16646DGG:11 datasheet, 74ALVCH16646DGG:11 pinout, 74ALVCH16646DGG:11 application, or 74ALVCH16646DGG:11 equivalent, this device enables bidirectional registered bus transfer between two 16-bit data domains with independent clocking (nCPAB/nCPBA), direction control (nDIR), output enable (nOE), and source selection (nSAB/nSBA) - critical for synchronous bus isolation and timing-critical backplane interfaces.

Technical Context

This IC integrates two independent 8-bit transceiver/register sections (Section 1 and Section 2), each with dedicated A- and B-side I/O, clock inputs, direction control, and select logic. Each section implements transparent mode (real-time pass-through) and registered mode (clocked storage), with simultaneous A→B and B→A register loading possible via separate LOW-to-HIGH clock edges on nCPAB and nCPBA.

Bus-hold circuitry maintains valid logic levels on all 32 data inputs without external pull-ups; 3-state outputs support hot-swap and bus sharing; and the TSSOP56 package features multiple VCC/GND pins to minimize ground bounce and noise coupling across its 16-bit-wide signal paths.

Key Specifications

Pinout & Package

TSSOP56 (SOT364-1) plastic thin shrink small outline package: 56-pin, 6.1 mm body width, 0.5 mm pitch, with 8 GND and 4 VCC pins distributed for low-inductance power delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVTH16646DGGR and 74LVC16646ADGG, the 74ALVCH16646DGG:11 uniquely combines bus-hold protection, JEDEC multi-voltage compliance, and optimized ground/power pin distribution - making it preferred for industrial systems requiring robustness without added passive components.

Availability

74ALVCH16646DGG:11 is available at Aetrix Electronics and suitable for memory expansion interfaces, backplane bus isolation, and multi-processor coherency links requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for 74ALVCH16646DGG: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 industrial, automotive, and computing markets.

The 74ALVCH series targets high-speed, low-power registered bus interfacing in space-constrained industrial systems - emphasizing noise immunity, wide supply tolerance, and seamless integration with mixed-voltage architectures.

FAQ

What is the minimum recommended pull-up resistor value for nOE during power-up?

The datasheet specifies that nOE must be tied to VCC through a pull-up resistor to ensure high-impedance state at power-up. The minimum value depends on the current-sinking capability of the driver controlling nOE; for typical 3.3 V systems with ≤100 μA leakage, a 10 kΩ resistor is sufficient. Values below 4.7 kΩ may cause excessive static current if nOE is actively driven LOW.

Can both nCPAB and nCPBA be asserted simultaneously?

Yes - asserting both nCPAB and nCPBA with LOW-to-HIGH transitions simultaneously clocks data from Port A into the B-register and from Port B into the A-register in the same cycle. This enables atomic bidirectional register exchange, confirmed in Table 3 (Function Selection) under "store A and B data, isolation" mode.

Does bus-hold functionality affect timing parameters?

No - bus-hold circuitry operates independently of signal path timing and does not alter propagation delay, setup/hold times, or clock-to-output specifications. It only engages on floating inputs and draws ≤175 μA (IBHH) or ≤150 μA (IBHL), with no impact on AC characteristics per Table 6 and Table 7.

Is the 74ALVCH16646DGG:11 compliant with RoHS and REACH?

Yes - Nexperia confirms RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 compliance for the 74ALVCH16646DGG:11, as documented in the official product environmental compliance statement (document ID: NEX-POL-ENV-001, Rev. 2024-Q2), available on the Nexperia website.