Nexperia USA Inc. HEF4020BT-Q100J

Overview

HEF4020BT-Q100J from Nexperia is an AEC-Q100 Grade 3 qualified 14-stage binary ripple counter IC with asynchronous master reset (MR), clock input (CP) triggered on HIGH-to-LOW transition, and 12 buffered parallel outputs (Q0, Q3–Q13). It operates across 3.0 V to 15.0 V supply, supports -40 °C to +85 °C ambient, and delivers propagation delays as low as 20 ns (at VDD = 15 V, CL = 0 pF) for Qn→Qn+1. It is used in automotive body control modules for odometer pulse division and dashboard timing synchronization.

For engineers reviewing the HEF4020BT-Q100J datasheet, HEF4020BT-Q100J pinout, HEF4020BT-Q100J application, or HEF4020BT-Q100J equivalent, key selection criteria include its 14-bit ripple counting capability, automotive-grade temperature and ESD robustness (HBM >2000 V), wide VDD range enabling direct 5/12 V rail compatibility, and SO16 package suitability for space-constrained PCB layouts.

Technical Context

This device implements a cascaded chain of 14 static CMOS toggle flip-flops, where each stage divides the preceding stage's output frequency by two. The counter advances only on the falling edge of CP, and MR forces all outputs LOW asynchronously-bypassing clock dependency. Inputs feature integrated clamp diodes, allowing safe interfacing to voltages exceeding VDD when current-limiting resistors are used.

Its dynamic behavior is load-dependent: propagation delay (e.g., CP→Q0) follows extrapolation formulas such as 22 ns + (0.16 ns/pF)×CL at 15 V, and maximum operating frequency reaches 35 MHz at VDD = 15 V with minimal capacitive loading. Output drive strength is specified up to ±3.6 mA (IOH/IOL) at 15 V, supporting direct connection to TTL or CMOS loads without buffering.

Key Specifications

Pinout & Package

HEF4020BT-Q100J is housed in a plastic small outline package (SO16), SOT109-1, with 16 leads and 3.9 mm body width. Pin 1 index is marked via notch or bevel; lead pitch is 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-stage binary counter applications.

Compared with CD4020BE and 74HC4020PW, the HEF4020BT-Q100J provides guaranteed automotive qualification, 3–15 V operation eliminating external regulators, and integrated input clamps for robustness against load-dump transients-making it the sole choice for production automotive timing functions requiring functional safety alignment.

Availability

HEF4020BT-Q100J is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and lighting control units requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for HEF4020BT-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 essential efficiency-enhancing components, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The HEF4020BT-Q100J belongs to Nexperia's automotive-qualified logic family, designed specifically to replace legacy 4000-series counters in safety-critical vehicle subsystems while maintaining pin-and-function compatibility with industry-standard footprints.

FAQ

What is the maximum clock frequency supported by HEF4020BT-Q100J?

The maximum clock frequency is 35 MHz at VDD = 15 V with zero load capacitance (CL = 0 pF), decreasing to 10 MHz at VDD = 5 V under same conditions. Frequency capability scales with supply voltage and degrades linearly with output load capacitance per the formula tPHL = 27 ns + (0.16 ns/pF) × CL at 15 V.

Can HEF4020BT-Q100J be operated from a 12 V automotive battery directly?

Yes - its 3.0 V to 15.0 V supply range allows direct connection to nominal 12 V systems, including transient conditions up to 13.5 V during normal operation. The absolute maximum VDD is +18 V, accommodating load-dump spikes when used with appropriate input filtering.

How does the asynchronous MR input behave during power-up?

MR is active HIGH and overrides all clock activity. During power-up, if MR is held HIGH until VDD stabilizes above 3.0 V, the counter initializes to all-zero state (Q0–Q13 = LOW) before first CP edge. This ensures deterministic startup without metastability risk, critical for automotive reset sequencing.

Are all 14 counter stages accessible at the package pins?

No - only Q0 and Q3 through Q13 are buffered and exposed (12 outputs total); Q1 and Q2 are internal and not available externally. This matches the standard HEF4020B pinout and avoids routing congestion while retaining full 14-bit division capability via Q13 (2¹³ = 8192).