Nexperia USA Inc. 74HC4020D,652

Overview

74HC4020D,652 from Nexperia is a 14-stage binary ripple counter IC with asynchronous master reset (MR), clock input (CP), and 12 buffered outputs (Q0, Q3–Q13). It advances on the HIGH-to-LOW CP edge, operates from 2.0 V to 6.0 V, delivers ≤24 ns propagation delay at 6.0 V, and is rated for -40 °C to +125 °C in SO16 package - used in frequency division and timing control circuits for industrial PLCs and sensor interface modules.

For engineers reviewing the 74HC4020D,652 datasheet, 74HC4020D,652 pinout, 74HC4020D,652 application, or 74HC4020D,652 equivalent, this page provides verified functional identity, SO16 pin mapping, ripple counter timing behavior, supply voltage tolerance, and validated alternatives for clock division and time-delay designs requiring CMOS-level compatibility and high noise immunity.

Technical Context

This device implements a cascaded chain of 14 static toggle flip-flops, where each stage divides its input by two. The counter advances only on the falling edge of CP, and MR forces all outputs LOW asynchronously - independent of CP state. No internal synchronization logic is present; output transitions propagate sequentially through the chain.

Input clamp diodes enable safe interfacing to voltages exceeding VCC when current-limiting resistors are used. Output drive capability is ±4.0 mA at VCC = 4.5 V, with VOH ≥ 3.98 V and VOL ≤ 0.26 V under load - ensuring reliable TTL/CMOS interfacing across temperature ranges.

Key Specifications

Pinout & Package

74HC4020D,652 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or index area; the package is RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar binary ripple counter applications.

Compared with 74HC4020D,652, the 74HCT4020D,653 offers easier integration into TTL-dominated systems but sacrifices 2 V operation, while SN74HC4020N trades board space and thermal performance for mechanical serviceability - neither is pin-compatible with SO16 footprint constraints.

Availability

74HC4020D,652 is available at Aetrix Electronics and suitable for frequency division, time delay generation, control counter sequencing, and LED blink pattern control requiring stable component supply across industrial, instrumentation, and embedded control applications.

Supply support for 74HC4020D,652 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 high-volume, high-reliability logic, discrete, and MOSFET solutions - headquartered in Nijmegen, Netherlands, with manufacturing in Europe and Asia.

The 74HC4020 belongs to Nexperia's HC logic family, designed specifically for low-power, wide-supply-range digital timing functions in industrial automation, power management, and sensor interface subsystems.

FAQ

What is the maximum clock frequency supported by 74HC4020D,652?

The maximum operating frequency is 24 MHz at VCC = 6.0 V (fmax = 109 MHz typical, derated to 24 MHz worst-case over temperature and process variation). This limit arises from cumulative propagation delay across 14 cascaded stages - Q0 toggles at f_IN, Q13 at f_IN/8192, so input clock must allow full chain settling before next edge.

Can MR be held HIGH continuously to disable counting?

Yes - asserting MR HIGH forces all outputs (Q0, Q3–Q13) LOW and holds the counter in reset state regardless of CP activity. Counting resumes only after MR returns LOW and a subsequent HIGH-to-LOW CP transition occurs. No minimum MR pulse width is specified beyond standard timing margins.

Are all 14 counter stages accessible at the 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 omission reduces pin count while retaining full 14-bit division capability - Q3 represents the third stage, confirming the internal presence of Q1/Q2.

Does 74HC4020D,652 include Schmitt-trigger inputs?

No - the CP and MR inputs lack Schmitt-trigger action. Input thresholds are standard CMOS levels (VIH ≈ 0.7×VCC, VIL ≈ 0.3×VCC), making them susceptible to noise on slow-rising edges. External RC filtering or a dedicated Schmitt-trigger buffer (e.g., 74HC14) is recommended for noisy clock sources.