NXP Semiconductors 74HC4020DB,112

Overview

74HC4020DB,112 from Nexperia is a 14-stage binary ripple counter IC with asynchronous master reset (MR), clock input (CP) triggered on HIGH-to-LOW transition, and 12 buffered outputs (Q0, Q3–Q13). It operates from 2.0 V to 6.0 V, delivers propagation delay as low as 11 ns at VCC = 6.0 V, and supports industrial temperature range (−40 °C to +125 °C). It is used in frequency division and time-delay circuits requiring precise cascaded timing.

For engineers reviewing the 74HC4020DB,112 datasheet, 74HC4020DB,112 pinout, 74HC4020DB,112 application, or 74HC4020DB,112 equivalent, this page provides verified functional identity, SO16 package mapping, validated 16-pin terminal roles, confirmed 14-bit ripple counting behavior, and real-world selection guidance against functionally aligned alternatives.

Technical Context

This device implements a synchronous-cascade–compatible 14-bit binary counter using static CMOS toggle flip-flops. Each stage advances only on the falling edge of CP, and MR forces all outputs LOW asynchronously-regardless of CP state. The output buffer architecture ensures fan-out capability while maintaining rail-to-rail logic levels across supply voltages.

Input clamp diodes enable safe interfacing with signals exceeding VCC when current-limiting resistors are used. The design complies with JESD7A (2.0–6.0 V) and JEDEC standards for latch-up immunity (>100 mA), ESD robustness (HBM >2000 V, CDM >1000 V), and thermal stability up to +125 °C ambient.

Key Specifications

Pinout & Package

74HC4020DB,112 is supplied in SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4020DB,112, the 74HC4060PW,118 integrates clock generation at the cost of trigger flexibility, while CD4020BE trades speed and drive strength for broader voltage compatibility and lower quiescent current-making each suitable for distinct system-level trade-offs.

Availability

74HC4020DB,112 is available at Aetrix Electronics and suitable for frequency division, time delay, control sequencing, and LED timing applications requiring stable component supply across automotive under-hood, industrial automation, and consumer electronics programs.

Supply support for 74HC4020DB,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 logic, analog, and MOSFET solutions, with manufacturing rooted in process innovation and automotive-grade reliability.

The 74HC4020 belongs to Nexperia's 74HC logic family-designed for low-power, high-noise-immunity digital control in industrial, computing, and communications infrastructure where predictable timing and robust operation are critical.

FAQ

What is the maximum clock frequency supported by 74HC4020DB,112?

The 74HC4020DB,112 supports a maximum clock frequency of 109 MHz at VCC = 6.0 V and CL = 15 pF, or 35 MHz at VCC = 6.0 V with CL = 50 pF. This is defined by the shortest allowable CP pulse width (9 ns min) and propagation delay through the first stage (11 ns typ). Operation beyond these limits risks metastability or skipped counts due to ripple accumulation.

Can MR be held HIGH continuously to disable counting?

Yes-asserting MR HIGH forces all outputs (Q0, Q3–Q13) LOW regardless of CP activity and holds the counter in reset state. This is an asynchronous, level-sensitive function. To resume counting, MR must be returned LOW before the next CP falling edge; no minimum deassertion time is required per datasheet.

Is 74HC4020DB,112 pin-compatible with 74HCT4020DB variants?

Yes-74HC4020DB,112 and 74HCT4020DB share identical SO16 pinout, terminal functions, and DC/AC electrical characteristics except for input voltage thresholds: 74HC uses CMOS-level inputs (VIH ≈ 0.7×VCC), while 74HCT uses TTL-compatible inputs (VIH = 2.0 V min). Swapping requires verifying source logic family compatibility.

Does this device require external pull-up or pull-down resistors on unused outputs?

No-unused outputs (e.g., Q1–Q2, not provided on this part) are not present; all 12 outputs (Q0, Q3–Q13) are internally buffered and may be left unconnected without risk. However, CP and MR inputs must not float: CP should be pulled HIGH or driven actively; MR should be pulled LOW via ≥10 kΩ resistor if not actively controlled.