Nexperia USA Inc. 74HC4520PW,112

Overview

74HC4520PW,112 from Nexperia is a dual 4-bit synchronous binary counter IC with two independent clock inputs (nCP0 and nCP1), asynchronous master reset (nMR), and buffered Q0–Q3 outputs per counter. It operates from 2.0 V to 6.0 V, supports both rising-edge (nCP0) and falling-edge (nCP1) counting modes, and is rated for -40 °C to +125 °C operation in TSSOP16 packaging. It is used in multistage synchronous counting and frequency division circuits.

For engineers reviewing the 74HC4520PW,112 datasheet, 74HC4520PW,112 pinout, 74HC4520PW,112 application, or 74HC4520PW,112 equivalent, this page delivers verified functional behavior, timing constraints, package-specific pin mapping, real-world use cases, and validated alternative parts - all grounded in Nexperia's Rev. 7 (2 April 2024) product data sheet.

Technical Context

This device implements two independent 4-bit synchronous binary counters sharing no internal coupling - each advances only on its designated clock edge (LOW-to-HIGH on nCP0 when nCP1 = HIGH, or HIGH-to-LOW on nCP1 when nCP0 = LOW). The asynchronous nMR input forces all eight outputs (1Q0–1Q3, 2Q0–2Q3) LOW regardless of clock state.

It uses standard CMOS logic levels (74HC variant), features input clamp diodes enabling overvoltage-tolerant interfacing, and meets JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards. Propagation delay ranges from 22 ns (VCC = 6.0 V) to 360 ns (VCC = 2.0 V) for nCP0/nCP1 → Q transitions.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, body width 4.4 mm, lead pitch 0.65 mm, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4520PW,112, both alternatives lack dual independent 4-bit sections and edge-selectable clocking - making them unsuitable for synchronized multistage counting or mixed-edge signal conditioning, despite shared counter functionality.

Availability

74HC4520PW,112 is available at Aetrix Electronics and suitable for industrial control systems, programmable logic interfaces, frequency synthesis modules, and test equipment requiring stable component supply across extended temperature ranges.

Supply support for 74HC4520PW,112 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 specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74HC4520 belongs to Nexperia's HC-series logic family, designed for robust, low-power digital signal routing and timing control in noise-sensitive industrial environments.

FAQ

Can 74HC4520PW,112 operate reliably at 3.3 V?

Yes. The 74HC4520PW,112 is fully specified from 2.0 V to 6.0 V. At VCC = 3.3 V, VIH(min) = 2.31 V and VIL(max) = 1.32 V per Table 6, ensuring clean logic thresholds with standard 3.3 V CMOS drivers. Propagation delay is ~35 ns (typ), supporting >20 MHz operation.

What happens if both nCP0 and nCP1 are HIGH simultaneously?

Per the function table (Table 3), when nCP0 = H and nCP1 = H, the counter holds its state regardless of transitions - no advance occurs. This condition is electrically safe and results in zero-count behavior until one clock input returns LOW (for nCP1) or transitions LOW-to-HIGH (for nCP0).

Is the TSSOP16 package RoHS compliant and lead-free?

Yes. Nexperia confirms the 74HC4520PW,112 (SOT403-1) meets RoHS Directive 2011/65/EU and is lead-free, with homogeneous material compliance verified per IEC 62321. The package uses matte tin (Sn) termination finish and complies with JEDEC J-STD-020 moisture sensitivity level 1.

How is the asynchronous reset synchronized across both counters?

Each counter has its own dedicated nMR pin (pin 7 for counter 1, pin 15 for counter 2). To synchronize reset, both pins must be driven by the same logic signal. No internal coupling exists - external wiring ensures simultaneous assertion, avoiding inter-counter skew.