Nexperia USA Inc. 74HC237D-Q100J

Overview

74HC237D-Q100J from Nexperia is an automotive-grade 3-to-8 line decoder/demultiplexer with integrated address latches, operating from 2.0 V to 6.0 V supply, featuring active LOW outputs, dual enable inputs (E1 active LOW, E2 active HIGH), and latch enable (LE) for stored-address operation. It delivers propagation delays as low as 15 ns at 6.0 V and supports ambient temperatures up to +125 °C, making it suitable for bus-oriented automotive control modules requiring non-overlapping strobe generation.

For engineers reviewing the 74HC237D-Q100J datasheet, 74HC237D-Q100J pinout, 74HC237D-Q100J application, or 74HC237D-Q100J equivalent, key selection criteria include latch-controlled address storage, dual enable logic independence, automotive AEC-Q100 Grade 1 qualification, and SO16 package compatibility with high-density PCB layouts.

Technical Context

The device integrates a 3-bit transparent latch with a 3-to-8 decoder, enabling address capture on LE HIGH-to-LOW transition and holding stable output states regardless of subsequent input changes. Its dual enable architecture (E1 LOW + E2 HIGH required for output activation) allows hierarchical decoding and system-level gating without external logic.

Logic operation follows strict truth-table behavior: all eight outputs remain HIGH unless both enables are asserted, and only one output goes LOW per decoded address. Output drive capability is specified at ±4.0 mA (VCC = 4.5 V) and ±5.2 mA (VCC = 6.0 V), with guaranteed VOL ≤ 0.26 V and VOH ≥ 3.98 V under load.

Key Specifications

Pinout & Package

Supplied in SO16 plastic small outline package (SOT109-1), 3.9 mm body width, 16-pin surface-mount format compatible with standard reflow profiles and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-to-8 decoder with latch applications.

Compared with SN74LV138A-Q1 and 74LVC138APW-Q100, the 74HC237D-Q100J uniquely combines latch retention, 6.0 V tolerance, and AEC-Q100 Grade 1 qualification in SO16 - making it the only choice for legacy 5 V automotive systems requiring glitch-free address storage under wide temperature and supply variation.

Availability

74HC237D-Q100J is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and ADAS camera interfaces requiring stable component supply across automotive production lifecycles.

Supply support for 74HC237D-Q100J 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 automotive, industrial, and consumer markets.

The 74HC237-Q100 product line delivers AEC-Q100 qualified HC-series logic with latch-enhanced decoding for automotive bus architectures requiring deterministic, noise-immune address routing.

FAQ

What is the minimum pulse width required on the LE input to reliably capture address data?

The LE input requires a minimum HIGH pulse width of 9 ns at VCC = 6.0 V, 10 ns at VCC = 4.5 V, and 50 ns at VCC = 2.0 V, as specified in the tW parameter. This ensures proper setup and hold timing for the internal latch circuitry to sample and retain A0–A2 values without metastability.

Can E1 and E2 be tied together for simplified enable control?

No - E1 is active LOW and E2 is active HIGH, so tying them together forces either permanent disable (if pulled HIGH) or permanent enable (if pulled LOW), eliminating independent control. Proper operation requires E1 = LOW and E2 = HIGH simultaneously; use a simple inverter if single-signal control is needed.

Does the 74HC237D-Q100J support hot insertion or live bus connection?

No - the device lacks Ioff (power-off protection) or IOZ (high-impedance output during power-down) features. Connecting while VCC is unpowered risks violating absolute maximum ratings on inputs and may cause latch-up. Power sequencing must ensure VCC is stable before applying address or enable signals.

How does the latch behavior affect timing in cascaded decoder configurations?

In cascaded setups, the latch holds the upper address bits while downstream decoders decode lower bits; this eliminates race conditions between stages. However, LE must be synchronized across all levels to avoid partial updates - asynchronous LE edges can cause transient output mismatches until all latches settle.