Nexperia USA Inc. HEF4043BT-Q100J

Overview

HEF4043BT-Q100 from Nexperia is a quad R/S latch IC with 3-state outputs, common output enable (OE), active-HIGH set/reset inputs, and automotive-grade AEC-Q100 Grade 3 qualification. It operates from 3.0 V to 15.0 V across -40 °C to +85 °C, delivers propagation delays as low as 7 ns (at VDD = 15 V, CL = 0 pF), and supports four-bit storage with independent latching and high-impedance output control - used in automotive body control modules for switch debouncing and signal routing.

For engineers reviewing the HEF4043BT-Q100 datasheet, HEF4043BT-Q100 pinout, HEF4043BT-Q100 application, or HEF4043BT-Q100 equivalent, key selection criteria include its wide supply range (3–15 V), OE-controlled 3-state outputs, latch retention during OE assertion, and verified AEC-Q100 Grade 3 compliance for under-hood automotive use.

Technical Context

This CMOS device implements four independent cross-coupled NAND-based R/S latches, each with dedicated active-HIGH set (nS) and reset (nR) inputs and a buffered 3-state output (nQ). The common OE input controls output driver enable/disable without affecting internal latch state - enabling bus sharing and dynamic output isolation.

Input clamp diodes allow safe interfacing to voltages exceeding VDD when used with current-limiting resistors. Static operation ensures stable state retention with zero DC clocking, while propagation delay scales predictably with load capacitance per extrapolation formulas (e.g., tPLH = 7 ns + 0.16 ns/pF × CL at 15 V).

Key Specifications

Pinout & Package

HEF4043BT-Q100 is housed in a plastic SO16 (SOT109-1) package: 16-pin small outline, 3.9 mm body width, 1.27 mm lead pitch, surface-mount compatible.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad R/S latch with 3-state output applications.

Compared with SN74LVCH16373A and 74HC175, the HEF4043BT-Q100 uniquely combines asynchronous R/S control, true 3-state outputs with OE, and 3–15 V operation - making it the only drop-in solution for automotive switch latching without supplemental logic or level translation.

Availability

HEF4043BT-Q100 is available at Aetrix Electronics and suitable for automotive body control units, instrument clusters, and aftermarket infotainment interfaces requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for HEF4043BT-Q100 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-enhancing components - including logic, discretes, MOSFETs, and ESD protection - with leadership in automotive-qualified parts.

The HEF4043BT-Q100 belongs to Nexperia's automotive logic portfolio, engineered specifically for robust, low-power, asynchronous signal conditioning in harsh-temperature vehicle subsystems.

FAQ

Does HEF4043BT-Q100 support 3.3 V operation?

Yes - the device operates from 3.0 V to 15.0 V per recommended conditions. At VDD = 3.3 V, VIH is 2.31 V min and VIL is 1.0 V max, ensuring compatibility with standard 3.3 V CMOS logic families. Propagation delay increases moderately (e.g., tPLH ≈ 135 ns at CL = 50 pF), but remains functional for non-high-speed latching tasks.

Can OE be toggled while latches are actively storing data?

Yes - OE has no effect on internal latch states. When OE transitions LOW, all outputs enter high-impedance mode immediately; when OE returns HIGH, previously stored Q states reappear on the outputs without change. This allows glitch-free bus arbitration and hot-swappable peripheral control.

What is the maximum capacitive load the outputs can drive reliably?

The outputs are characterized up to 50 pF per dynamic test condition (Table 10), with guaranteed tPLH/tPHL performance within spec. Driving >50 pF increases propagation delay linearly (e.g., +0.16 ns/pF at 15 V); for loads beyond 100 pF, consider adding a buffer stage or reducing VDD to improve slew rate margin.

Is there a non-automotive version of this part?

Yes - the HEF4043B (non-Q100) shares identical electrical specifications and pinout but lacks AEC-Q100 qualification and extended temperature screening. It is rated for -40 °C to +85 °C operation but not certified for automotive production use; the -Q100 suffix denotes full automotive qualification including stress testing and lot traceability.