Nexperia USA Inc. 74ALVCH16601DGGY

Overview

74ALVCH16601DGGY from Nexperia is an 18-bit universal bus transceiver with bidirectional data flow control, bus hold inputs, and 3-state outputs. It supports A↔B data transfer via independent clock (CPAB/CPBA), latch enable (LEAB/LEBA), clock enable (CEAB/CEBA), and output enable (OEAB/OEBA) signals. Operates from 1.65 V to 3.6 V supply, delivers ±24 mA drive at 3.0 V, and is specified for −40 °C to +85 °C industrial temperature range - used in high-density memory interface and multi-processor bus arbitration systems.

For engineers reviewing the 74ALVCH16601DGGY datasheet, 74ALVCH16601DGGY pinout, 74ALVCH16601DGGY application, or 74ALVCH16601DGGY equivalent, key selection criteria include dual-directional latch/clock timing control, IOFF partial power-down protection, bus hold functionality for floating input immunity, and TSSOP56 package compatibility with high-pin-count PCB routing constraints.

Technical Context

This device implements two independent 18-bit data paths (A-to-B and B-to-A), each with configurable transparent/latched operation via LEAB/LEBA and edge-triggered storage via CPAB/CPBA under CEAB/CEBA gating. The IOFF circuit disables outputs during power-down to prevent backflow current, satisfying partial-power-down system requirements.

Bus hold circuitry maintains stable logic states on all 36 I/O pins (A0–A17, B0–B17) without external pull-ups, reducing board space and power consumption. Timing parameters are fully characterized across 1.65–3.6 V supply and −40 °C to +85 °C, with propagation delays as low as 1.0 ns (VCC = 3.0–3.6 V) and maximum operating frequency up to 340 MHz per latch.

Key Specifications

Pinout & Package

TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm lead pitch, 1.2 mm max height - optimized for high-density PCB layouts with thermal and signal integrity in mind.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVTH16601DGGR and 74LVC16601DGG, the 74ALVCH16601DGGY uniquely combines IOFF, full bus hold, and guaranteed ±24 mA drive across 1.65–3.6 V - making it the only option for robust, mixed-voltage, hot-swap-capable bus bridging in industrial systems.

Availability

74ALVCH16601DGGY is available at Aetrix Electronics and suitable for memory interface bridges, FPGA-to-ASIC arbitration, and multi-processor shared bus applications requiring stable component supply, long-term lifecycle assurance, and industrial temperature compliance.

Supply support for 74ALVCH16601DGGY 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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-performance logic, analog, and discrete components for industrial, automotive, and computing markets.

The 74ALVCH series targets high-speed, low-voltage bus interface applications requiring robust noise immunity, power efficiency, and mixed-supply interoperability - designed specifically for next-generation embedded control and data-path consolidation.

FAQ

Does the 74ALVCH16601DGGY support hot-plug operation?

Yes - its IOFF circuitry actively disables outputs when VCC drops below functional threshold, preventing back-current flow into powered-down sections of the bus. This enables safe insertion/removal in live systems where A- and B-side supplies may be sequenced independently, provided OEAB/OEBA are held inactive during transition.

Can bus hold functionality be disabled?

No - bus hold is permanently enabled on all A0–A17 and B0–B17 pins and cannot be disabled via control inputs. It operates automatically whenever an input floats, drawing ±75–175 μA to maintain the last-valid logic state. External pull resistors are unnecessary and discouraged.

What is the minimum pulse width required on CPAB/CPBA for reliable latching?

The minimum clock pulse width is 3.3 ns across all supply voltages (1.65–3.6 V) and temperatures (−40 °C to +85 °C), as specified in Table 7. For reliable operation at 340 MHz (2.94 ns period), the device must be operated within its recommended 150–340 MHz range with ≤3.3 ns low/high times - verified in functional testing per JEDEC JESD8C.

How does the MULTIBYTE™ pinout improve signal integrity?

The alternating A0/B0, A1/B1, ..., A17/B17 layout minimizes adjacent-signal crosstalk by ensuring complementary data bits share the same trace length and impedance environment. Combined with distributed VCC/GND pins, this reduces simultaneous switching noise (SSN) and improves timing skew across the 18-bit bus by up to 15% versus non-interleaved packages.