Nexperia USA Inc. 74HC4520D,118

Overview

74HC4520D,118 from Nexperia is a dual 4-bit synchronous binary counter IC with two independent clock inputs (1CP0/1CP1 and 2CP0/2CP1), asynchronous master reset (1MR/2MR), and buffered Q0–Q3 outputs per counter. It operates from 2.0 V to 6.0 V, supports dual-edge clocking (LOW-to-HIGH on CP0 when CP1 = HIGH; HIGH-to-LOW on CP1 when CP0 = LOW), and delivers propagation delays as low as 22 ns at VCC = 6.0 V - used in multistage synchronous counting and frequency division circuits.

For engineers reviewing the 74HC4520D,118 datasheet, 74HC4520D,118 pinout, 74HC4520D,118 application, or 74HC4520D,118 equivalent, this device is selected for precise 4-bit binary timing control where dual-clock flexibility, CMOS-level input compatibility, and -40 °C to +125 °C industrial temperature operation are required.

Technical Context

This IC integrates two fully independent 4-bit synchronous binary counters sharing no internal coupling - each advances only on its designated clock edge condition and resets asynchronously via dedicated MR pins. Its dual-clock architecture enables flexible clock enable or dual-phase counting without external logic.

Each counter's output stage provides buffered Q0–Q3 signals with guaranteed VOL ≤ 0.4 V at IO = 5.2 mA and VOH ≥ 5.2 V at VCC = 6.0 V, supporting direct interfacing to standard CMOS loads. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

74HC4520D,118 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads and 3.9 mm body width - surface-mount compatible with standard reflow profiles and IPC-compliant PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4520D,118, the 74HCT4520D,118 offers easier integration into mixed TTL-CMOS systems, while the SN74LV4040ADR trades dual-clock capability for deeper division and lower static current - making each optimal for distinct timing architecture priorities.

Availability

74HC4520D,118 is available at Aetrix Electronics and suitable for motor control timing, programmable logic sequencing, and frequency division requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for 74HC4520D,118 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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and sustainability.

The 74HC4520 belongs to Nexperia's HC logic family - engineered for low-power, high-noise-immunity digital control in industrial automation, automotive subsystems, and consumer electronics.

FAQ

What is the maximum clock frequency supported by 74HC4520D,118?

The 74HC4520D,118 supports up to 69 MHz at VCC = 6.0 V and CL = 50 pF, with typical propagation delay of 22 ns. At 4.5 V, maximum frequency drops to 58 MHz. Performance is specified across -40 °C to +125 °C, ensuring consistent timing in harsh environments.

Can 74HC4520D,118 be used with 3.3 V supply?

Yes - the 74HC4520D,118 is fully specified from 2.0 V to 6.0 V. At 3.3 V, VIH = 2.31 V (min), VIL = 1.09 V (max), and tpd ≈ 35 ns (max), enabling reliable operation in mixed-voltage 3.3 V/5 V systems without level shifters.

How does the dual-clock architecture work in practice?

Each counter advances on either CP0 rising edge (if CP1 = HIGH) or CP1 falling edge (if CP0 = LOW). This allows one pin to serve as clock and the other as enable - e.g., CP0 = system clock, CP1 = gated enable signal - eliminating external AND gates in enable-controlled counting.

Is there a carry-out signal available for cascading counters?

No - the 74HC4520D,118 does not provide explicit carry-out (RCO) or terminal-count outputs. Cascading requires external logic to detect Q0–Q3 = 1111 and drive the MR or CP inputs of the next stage, or use the Q3 output as a ÷16 strobe signal.