Nexperia USA Inc. 74ALVCH32973EC,518

Overview

74ALVCH32973EC,518 from Nexperia is a 16-bit bus transceiver and transparent D-type latch with eight independent buffers, bus hold inputs, and 3-state outputs. It integrates dual 8-bit transceivers (1A/1B, 2A/2B), dual 8-bit latches (1Q, 2Q), and an independent 8-bit buffer (D/Y), all operating across 1.2 V to 3.6 V. Its direction, latch enable, transceiver output enable, and latch output enable controls support flexible data routing in high-density PCB interconnects for industrial control backplanes.

For engineers reviewing the 74ALVCH32973EC,518 datasheet, 74ALVCH32973EC,518 pinout, 74ALVCH32973EC,518 application, or 74ALVCH32973EC,518 equivalent, this device delivers configurable signal conditioning with bus hold stabilization, sub-4 ns propagation delay at 3.3 V, ±24 mA drive strength, and LFBGA96 packaging optimized for space-constrained embedded systems requiring level-shifted bidirectional data flow.

Technical Context

The device implements three independent functional blocks: two 8-bit transceivers each with dedicated DIR and TOE controls, two 8-bit transparent D-type latches with LE/LOE controls, and one isolated 8-bit buffer unaffected by control inputs. Each transceiver supports bidirectional A↔B data flow controlled by nDIR, with nTOE enabling high-impedance isolation of both ports simultaneously.

Latch operation is edge-triggered on the HIGH-to-LOW transition of nLE, storing data present at A inputs one setup time prior; nLOE independently disables Q outputs without affecting latch state. The 8-bit D→Y buffer operates asynchronously and continuously, providing deterministic unidirectional buffering decoupled from transceiver/latch timing.

Key Specifications

Pinout & Package

LFBGA96 package (SOT536-1): 13.5 mm × 5.5 mm × 1.05 mm body, 96-ball fine-pitch array with index marker at ball A1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH162954DGGR and 74LVC16373APAG, the 74ALVCH32973EC,518 uniquely consolidates transceiver, latch, and buffer functions in one LFBGA96 package-reducing component count, interconnect complexity, and layout area in space-constrained industrial and test systems.

Availability

74ALVCH32973EC,518 is available at Aetrix Electronics and suitable for industrial backplane interconnects, FPGA I/O expansion, memory interface bridging, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for 74ALVCH32973EC,518 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 delivering high-performance logic, analog, and MOSFET solutions with emphasis on reliability, efficiency, and miniaturization for industrial and consumer electronics.

The 74ALVCH32973EC,518 belongs to Nexperia's ALVCH advanced low-voltage CMOS logic family, designed specifically for high-speed, low-power, mixed-voltage system interfacing in space-constrained embedded applications.

FAQ

What is the maximum operating frequency supported by the 74ALVCH32973EC,518?

The device does not specify a maximum clock frequency but supports propagation delays as low as 2.5 ns (typ.) for nAn→nQn at VCC = 3.3 V, enabling reliable operation in systems with 200+ MHz data capture rates. Timing margins must be verified using setup/hold times (tsu = 1.1 ns, th = 0.2 ns at 3.3 V) and load conditions per the datasheet's dynamic characteristics table.

Can the 74ALVCH32973EC,518 operate with a 1.8 V supply?

Yes-the device is fully specified from 1.2 V to 3.6 V. At 1.8 V, it delivers 3.4 ns typical propagation delay (nAn→nQn), ±6 mA output drive, and maintains bus hold functionality with IBHL = 45 μA. All DC and AC parameters in Tables 7–9 are validated across this full voltage range.

How does the bus hold feature eliminate external pull resistors?

Each data and control input includes an internal weak keeper circuit that sources or sinks current (±45–150 μA depending on VCC and logic level) to maintain the last valid logic state when the input is floating. This prevents undefined states and reduces board-level components without impacting speed or noise immunity.

Is the 8-bit D→Y buffer truly independent of control inputs?

Yes-the D[0:7]→Y[0:7] path operates asynchronously and continuously regardless of nLE, nLOE, nDIR, or nTOE states. Its propagation delay is 1.8 ns (typ.) at 3.3 V, and it remains active even when all other functional blocks are disabled or in high-impedance mode.