NXP Semiconductors 74HC4520PW-Q100J

Overview

74HC4520PW-Q100 from Nexperia is a dual 4-bit synchronous binary counter IC with two independent clock inputs (nCP0, nCP1), buffered Q0–Q3 outputs per counter, and asynchronous master reset (nMR). It operates from 2.0 V to 6.0 V, supports automotive-grade temperature range (−40 °C to +125 °C), and advances on either LOW-to-HIGH nCP0 (with nCP1 HIGH) or HIGH-to-LOW nCP1 (with nCP0 LOW). It is used in multistage synchronous counting and frequency division circuits within automotive body control modules.

For engineers reviewing the 74HC4520PW-Q100 datasheet, 74HC4520PW-Q100 pinout, 74HC4520PW-Q100 application, or 74HC4520PW-Q100 equivalent, key selection criteria include edge-triggering flexibility (dual-clock edge sensitivity), AEC-Q100 Grade 1 qualification, TSSOP16 package thermal performance, and CMOS-level input compatibility for low-power automotive timing chains.

Technical Context

This device implements two independent 4-bit synchronous binary counters sharing no internal coupling-each has dedicated clock inputs (nCP0/nCP1), reset (nMR), and outputs (nQ0–nQ3). Clocking logic enables either input to serve as active clock while the other acts as enable, supporting asymmetric timing control without external gating.

Its dual-edge-trigger architecture allows precise phase-aligned or staggered counting across cascaded stages. The asynchronous nMR asserts independently of clock edges, ensuring deterministic reset under fault conditions-critical for automotive fail-safe timing subsystems requiring guaranteed state recovery.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-lead, 4.4 mm body width, 0.65 mm pitch - designed for automated assembly and thermal reliability in automotive environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-bit synchronous counter applications.

Compared with 74HC4520D-Q100, the PW variant saves 35 % board area and improves thermal dissipation in compact ECUs; compared with 74HCT4520PW-Q100, the HC version delivers 30 % higher noise immunity in electrically noisy powertrain zones.

Availability

74HC4520PW-Q100 is available at Aetrix Electronics and suitable for automotive body control units, engine management systems, and ADAS camera synchronization requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC4520PW-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 delivering high-performance, reliable logic, discrete, and MOSFET solutions with focus on automotive, industrial, and mobile markets.

The 74HC4520-Q100 belongs to Nexperia's automotive-qualified logic family, engineered specifically for robust timing, counting, and signal conditioning in harsh-temperature electronic control units.

FAQ

What clock edge configurations does the 74HC4520PW-Q100 support?

The device supports two distinct edge-triggering modes: counter advances on the LOW-to-HIGH transition of nCP0 when nCP1 is HIGH, and on the HIGH-to-LOW transition of nCP1 when nCP0 is LOW. Either nCP0 or nCP1 may serve as the primary clock input, with the other functioning as an edge-sensitive enable-enabling flexible timing control without external logic.

Can the 74HC4520PW-Q100 operate reliably at 2.0 V supply?

Yes-it is fully specified down to 2.0 V supply voltage, with propagation delay of 240 ns (max) and guaranteed CMOS-level input thresholds at that rail. This supports operation during automotive cold-crank conditions where battery voltage drops below 6 V, maintaining functional counting behavior in safety-critical subsystems.

How does the asynchronous master reset (nMR) behave during clock transitions?

nMR is asynchronous and active HIGH: asserting it forces all eight outputs (1Q0–1Q3, 2Q0–2Q3) LOW immediately, irrespective of nCP0 or nCP1 states or transitions. The reset takes effect within 150 ns (max) at VCC = 2.0 V and 30 ns (max) at VCC = 6.0 V-ensuring deterministic state clearing for fail-safe system initialization.

Is the TSSOP16 package (SOT403-1) compatible with standard reflow profiles?

Yes-the SOT403-1 package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature tolerance up to 260 °C. Its 0.65 mm pitch and exposed pad-free construction ensure compatibility with standard stencil printing and convection reflow processes used in automotive electronics manufacturing.