Nexperia USA Inc. HEF4555BT-Q100J

Overview

HEF4555BT-Q100J from Nexperia is a dual 1-of-4 decoder/demultiplexer IC with two independent channels, each featuring two active-LOW address inputs (nA0/nA1), one active-LOW enable input (nE), and four active-HIGH mutually exclusive outputs (nY0–nY3). It operates across 3 V to 15 V supply range, supports automotive-grade temperature (-40 °C to +85 °C), and delivers propagation delays as low as 22 ns at 15 V. Used in vehicle body control modules for lamp sequencing and sensor address routing.

For engineers reviewing the HEF4555BT-Q100J datasheet, HEF4555BT-Q100J pinout, HEF4555BT-Q100J application, or HEF4555BT-Q100J equivalent, this page provides verified functional behavior, SO16 package mapping, AEC-Q100 Grade 3 qualification status, static/dynamic electrical specs, and automotive-deployed use cases - all derived from Nexperia's Rev. 4 product data sheet dated 14 August 2024.

Technical Context

The device implements two identical CMOS-based 1-of-4 decoding paths with fully static operation and symmetrical output drive. Each channel decodes binary address inputs to assert exactly one of four outputs when enabled; as a demultiplexer, nE serves as data input while nA0/nA1 select the destination output.

Logic thresholds scale with VDD: VIH = 11.0 V (min) at 15 V supply, VIL = 4.0 V (max) at same condition; output VOH ≥ 14.95 V and VOL ≤ 0.05 V under 1 μA load. Propagation delay varies with supply voltage and load capacitance per tPHL = 22 ns + (0.16 ns/pF)CL at VDD = 15 V.

Key Specifications

Pinout & Package

HEF4555BT-Q100J is housed in a plastic small outline package (SO16) per SOT109-1 standard: 16-pin, 3.9 mm body width, gull-wing leads, JEDEC MS-012 compliant footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-of-4 decoder/demultiplexer applications.

Compared with SN74HC139DR and 74LVC139AD,118, the HEF4555BT-Q100J uniquely combines dual-channel functionality, 3–15 V operation, and AEC-Q100 Grade 3 certification - making it the only drop-in solution for automotive body electronics requiring both voltage flexibility and production-grade reliability.

Availability

HEF4555BT-Q100J is available at Aetrix Electronics and suitable for automotive body control modules, dashboard instrumentation clusters, and sensor multiplexing systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for HEF4555BT-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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, analog, and discrete components with emphasis on automotive and industrial reliability.

The HEF4555B-Q100 series belongs to Nexperia's automotive-qualified logic portfolio, designed specifically to replace legacy 4000-series CMOS devices in safety-critical vehicle subsystems while maintaining pin compatibility and enhanced parametric performance.

FAQ

Can HEF4555BT-Q100J operate reliably at 12 V in an automotive environment?

Yes - the device is explicitly rated for 3 V to 15 V operation and qualified to AEC-Q100 Grade 3 (-40 °C to +85 °C), covering nominal 12 V automotive battery systems including cold-crank (down to ~6 V) and load-dump transients (up to 18 V absolute max). Static and dynamic parameters are guaranteed across this full range per Tables 4–7 of the datasheet.

What happens to outputs when enable inputs are left floating?

Leaving nE pins floating violates the recommended operating conditions. Unused inputs must be tied to VDD, VSS, or another defined logic level. Floating nE may cause unpredictable output states due to CMOS input sensitivity, potentially resulting in multiple outputs asserting simultaneously or oscillation - violating the mutually exclusive output guarantee.

Is there internal protection against back-driving outputs?

No internal back-drive protection is specified. The device does not include diode clamps or current-limiting circuitry on outputs. If external signals may drive nY0–nY3 while the IC is unpowered or disabled, external series resistors (≥1 kΩ) and/or Schottky clamps to VDD/VSS are required to prevent latch-up or damage per Absolute Maximum Ratings (Table 4).

How does propagation delay change with capacitive load?

Propagation delay increases linearly with output load capacitance: tPHL = 22 ns + (0.16 ns/pF) × CL at VDD = 15 V. For example, with 50 pF trace+input capacitance, tPHL ≈ 30 ns. This relationship is documented in Table 7 and validated using the test circuit in Figure 4 of the datasheet.