Nexperia USA Inc. 74HC4020D-Q100J

Overview

74HC4020D-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 14-stage binary ripple counter 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 ≤24 ns propagation delay at 6.0 V, and supports automotive ambient temperatures up to +125 °C. It is used in frequency division and timing control circuits within engine control units and body electronics.

For engineers reviewing the 74HC4020D-Q100 datasheet, 74HC4020D-Q100 pinout, 74HC4020D-Q100 application, or 74HC4020D-Q100 equivalent, key selection criteria include its CMOS-level input compatibility, 14-bit ripple count capability, SO16 package mechanical footprint, automotive-grade thermal robustness, and verified MR/CP timing margins per IEC 60134 limiting values.

Technical Context

This device implements a cascaded chain of 14 static toggle flip-flops, advancing only on the falling edge of CP. Each stage drives the next via internal ripple propagation, resulting in cumulative delay-e.g., Q13 exhibits ~210 ns max delay relative to CP at 2.0 V supply. The MR input overrides all stages asynchronously and forces all outputs LOW regardless of CP state.

Input clamp diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Output drive strength is specified at ±4.0 mA (VOH/VOL) under 4.5 V supply, supporting direct connection to standard CMOS loads without external buffering in most automotive sub-systems.

Key Specifications

Pinout & Package

74HC4020D-Q100 uses the plastic small outline package SOT109-1 (SO16) with 16 leads, 3.9 mm body width, and standard JEDEC MS-012 dimensions. Pin 1 index is marked by a beveled corner or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4020D-Q100, the 74HCT4020D-Q100 offers easier interfacing to 5 V TTL logic but sacrifices noise margin at low VCC, while SN74LV4020DR reduces supply flexibility and removes automotive qualification - making the original part optimal for new AEC-compliant designs requiring full voltage and thermal coverage.

Availability

74HC4020D-Q100 is available at Aetrix Electronics and suitable for engine control units, body electronics modules, infotainment clock trees, and ADAS sensor timing circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC4020D-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 specializing in high-performance, high-reliability logic, analog, and MOSFET solutions, with leadership in automotive-grade components and AEC-Q100 qualification capabilities.

The 74HC4020-Q100 belongs to Nexperia's automotive logic portfolio, designed specifically to replace discrete timing networks in safety-critical vehicle subsystems while meeting stringent EMC, thermal, and longevity requirements.

FAQ

What is the maximum clock frequency supported by the 74HC4020D-Q100?

The device supports up to 41.7 MHz at VCC = 6.0 V (fmax = 1/tpd_min = 1/24 ns), confirmed in Table 7 of the datasheet. At 4.5 V, fmax drops to 35.7 MHz (28 ns typical tpd), and at 2.0 V it falls to 7.1 MHz (140 ns max tpd). These values assume CL = 50 pF and operation within recommended conditions.

Can the 74HC4020D-Q100 be used with a 3.3 V supply?

Yes - the 74HC4020D-Q100 is fully specified down to 2.0 V, including VIH = 2.31 V (min) and VOL = 0.26 V (max) at VCC = 3.3 V per interpolated static characteristics. Its CMOS inputs ensure reliable switching with 3.3 V logic families, and propagation delay remains ≤35 ns (typical).

Is there a functional difference between Q0–Q13 outputs and missing Q1/Q2?

Q1 and Q2 are not brought out to pins - only Q0 and Q3–Q13 are buffered and available. This omission reduces pin count while preserving the full 14-bit count sequence internally; Q1 and Q2 remain accessible only as internal nodes and cannot drive external loads.

How does the master reset (MR) interact with the clock input (CP)?

MR is asynchronous and dominant: a HIGH on MR immediately clears all 14 flip-flops and forces Q0–Q13 LOW, irrespective of CP state or timing. No setup/hold time relative to CP is required, and the counter resumes counting from zero on the next valid CP falling edge after MR returns LOW.