Nexperia USA Inc. 74ALVCH16652DGGY

Overview

74ALVCH16652DGGY from Nexperia is a 16-bit dual-enable bus transceiver/register IC with 3-state outputs, D-type flip-flops, and real-time/storage mode selection. It operates from 1.2 V to 3.6 V, delivers ±24 mA drive at 3.0 V, supports −40 °C to +85 °C ambient, and features active bus hold on all data inputs. It enables bidirectional data flow between two 16-bit buses (A and B) in systems requiring multiplexed bus interfacing, such as memory expansion or processor-to-peripheral bridging.

For engineers reviewing the 74ALVCH16652DGGY datasheet, 74ALVCH16652DGGY pinout, 74ALVCH16652DGGY application, or 74ALVCH16652DGGY equivalent, this device provides dual-clock-controlled register storage, independent A↔B direction control via nSAB/nSBA, and simultaneous 3-state enable/disable of both transceiver paths - critical for high-density PCB bus isolation and timing-critical data latching in industrial controllers and telecom backplanes.

Technical Context

The 74ALVCH16652DGGY implements two independent 8-bit transceiver/register sections (Section 1 and Section 2), each with dedicated clock (nCPAB/nCPBA), select (nSAB/nSBA), and output enable (nOEAB/nOEBA) controls. Its architecture allows concurrent real-time pass-through and clocked register storage - e.g., nCPAB can latch data from Bus A into internal D-flip-flops while nSAB selects direct A→B transfer, all under independent OE control.

It uses CMOS technology with bus hold circuitry on all 32 data I/O pins (1A0–1A7, 1B0–1B7, 2A0–2A7, 2B0–2B7), eliminating external pull-ups. Propagation delays range from 1.0 ns (VCC = 3.0–3.6 V, real-time path) to 4.5 ns (disable time), and maximum clock frequency reaches 320 MHz per channel at 3.3 V with 50 pF load.

Key Specifications

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, 6.1 mm body width, 0.5 mm pitch, with low-inductance multiple VCC/GND pins for minimized ground bounce and noise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit dual-directional transceiver/register applications.

Compared with SN74ALVTH16652DGGR and 74LVC16652ADGG, the 74ALVCH16652DGGY uniquely combines wide-voltage operation (1.2–3.6 V), integrated bus hold, and MULTIBYTE™ pinout - making it optimal for mixed-voltage industrial systems requiring zero-external-component robustness and simplified layout.

Availability

74ALVCH16652DGGY is available at Aetrix Electronics and suitable for memory expansion interfaces, processor-to-peripheral bridges, industrial backplane arbiters, and telecom line card data muxes requiring stable component supply across extended temperature ranges and mixed-voltage designs.

Supply support for 74ALVCH16652DGGY 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 essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74ALVCH16652DGGY belongs to Nexperia's advanced ALVCH logic family, engineered for low-power, high-speed bidirectional bus interfacing in space-constrained industrial and telecom equipment where voltage flexibility and noise immunity are critical.

FAQ

Can 74ALVCH16652DGGY operate at 1.2 V while maintaining full timing performance?

No. At 1.2 V, the device meets DC specifications (VIH/VIL, ICC) but dynamic parameters like t_pd and f_max are not characterized below 1.65 V. For guaranteed timing, use ≥2.3 V per JEDEC JESD8-5. The 1.2 V rating enables low-power standby or partial functionality, not full-speed operation.

What happens when both nOEAB and nOEBA are asserted simultaneously?

When nOEAB = HIGH and nOEBA = LOW, both A→B and B→A output drivers are enabled, creating a bidirectional wired-OR bus condition. This configuration reinforces signal integrity only if external series termination is applied - otherwise, contention may occur if A and B buses drive opposite logic states.

Does the bus hold feature affect propagation delay or power consumption?

Yes. Bus hold adds ~150 μA per pin to ICC (typical) and increases input capacitance by ≤0.5 pF. Propagation delay increases by ≤0.3 ns versus disabled bus hold, due to added input stage loading - verified in Table 9 test conditions with CL = 30/50 pF.

How is clock skew managed between nCPAB and nCPBA inputs in dual-section operation?

The device does not internally synchronize nCPAB and nCPBA. They are independent inputs; skew must be controlled externally via matched PCB trace lengths (<5 mm difference) and clean local clock distribution. Data sheet Table 7 specifies t_pd per clock path, not inter-path skew tolerance.