Nexperia USA Inc. 74ALVCH16652DGGS

Overview

74ALVCH16652DGGS from Nexperia is a 16-bit dual-supply bus transceiver/register with independent A↔B bidirectional data paths, dual clock inputs (nCPAB/nCPBA), dual select controls (nSAB/nSBA), and dual 3-state output enables (nOEAB active-HIGH, nOEBA active-LOW). It operates from 1.2 V to 3.6 V, delivers ±24 mA drive at 3.0 V, supports real-time or registered data transfer modes, and integrates bus-hold on all data inputs for floating-input immunity. It is used in high-density memory expansion interfaces and multi-bus system interconnects requiring simultaneous A-to-B and B-to-A data staging.

For engineers reviewing the 74ALVCH16652DGGS datasheet, 74ALVCH16652DGGS pinout, 74ALVCH16652DGGS application, or 74ALVCH16652DGGS equivalent, this page provides verified functional architecture, TSSOP56 package mapping, JEDEC-compliant voltage timing margins, bus-hold current specs, and validated alternatives for 16-bit bidirectional registered bus interfacing in industrial control backplanes and FPGA I/O expansion.

Technical Context

The device implements two independent 8-bit transceiver/register sections (Section 1 and Section 2), each with separate clock, select, and enable controls-enabling concurrent A→B and B→A registered transfers or isolated real-time pass-through. Its dual-enable logic (nOEAB HIGH-active, nOEBA LOW-active) allows asymmetric output control per direction without external gating.

Bus-hold circuitry actively maintains valid logic levels on all 32 data I/O pins (1A0–1A7, 1B0–1B7, 2A0–2A7, 2B0–2B7) when un-driven, eliminating external pull-ups. Propagation delays are specified down to 1.0 ns (VCC = 3.0–3.6 V), with maximum clock frequency of 320 MHz per channel and setup/hold times as low as 0.3 ns/0.2 ns at 3.3 V.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVTH16652DGGR and 74LVC16652ADGG, the 74ALVCH16652DGGS uniquely combines bus-hold, ultra-low ICC (<40 μA), and full 1.2–3.6 V operation-making it the only option for mixed-voltage, floating-input, low-power industrial backplanes.

Availability

74ALVCH16652DGGS is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA I/O bridges, industrial backplane interconnects, and dual-processor coherency links requiring stable component supply across extended temperature and mixed-voltage operation.

Supply support for 74ALVCH16652DGGS 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 specializing in high-performance logic, analog, and discrete components, with leadership in automotive-qualified and industrial-grade standard products.

The 74ALVCH16652DGGS belongs to Nexperia's ALVCH advanced low-voltage CMOS logic family, engineered for low-noise, high-speed bidirectional bus interfacing in industrial automation, communications infrastructure, and embedded computing systems.

FAQ

Can the 74ALVCH16652DGGS operate with different supply voltages on its A and B sides?

No-the device has a single VCC pin (4 total, internally tied) and shares one supply rail across all logic and I/O circuits. It does not support true dual-supply operation. However, its 1.2 V to 3.6 V range allows interoperability with 1.8 V, 2.5 V, and 3.3 V systems when level-matched via external resistive dividers or series termination, provided input thresholds (VIH/VIL) are met per Table 6.

What happens to data outputs when both nOEAB and nOEBA are asserted simultaneously?

When nOEAB = HIGH and nOEBA = LOW, both A→B and B→A outputs are enabled, allowing bidirectional data flow. If both buses drive conflicting logic states (e.g., A-side drives HIGH while B-side drives LOW on the same net), the stronger driver dominates-but this condition violates recommended usage and risks excessive current. The device is designed for controlled, non-contentious bus sharing via coordinated enable sequencing.

Does the bus-hold feature remain active during power-down or when VCC = 0 V?

No-bus-hold circuitry requires VCC to be within specification (≥1.2 V) to function. When VCC is removed or below 1.2 V, bus-hold is disabled and data pins become high-impedance. For true power-down state retention, external weak pull resistors must be added. The bus-hold current values (IBHL/IBHH) are only guaranteed under recommended operating conditions (−40 °C to +85 °C, VCC = 1.2–3.6 V).

How does the real-time transfer mode interact with clock inputs nCPAB and nCPBA?

In real-time mode (nSAB = LOW for A→B; nSBA = LOW for B→A), data passes directly from input to output regardless of nCPAB/nCPBA state-clock signals are ignored. However, data is *still latched* into internal registers on every LOW-to-HIGH clock edge, even during real-time transfer. This allows immediate output forwarding while concurrently storing data for later registered use, enabling zero-latency handshaking with background staging.