Nexperia USA Inc. 74HCT4017D-Q100J

Overview

74HCT4017D-Q100 from Nexperia is an automotive-grade 5-stage Johnson decade counter IC with 10 decoded outputs (Q0–Q9), dual-edge-triggered clock inputs (CP0 and CP1), asynchronous master reset (MR), and carry output Q5-9. It operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient range, and delivers propagation delays as low as 20 ns at VCC = 4.5 V. It is used in sequential timing control circuits such as LED chasers, divide-by-N counters, and automotive dashboard sequencers.

For engineers reviewing the 74HCT4017D-Q100 datasheet, 74HCT4017D-Q100 pinout, 74HCT4017D-Q100 application, or 74HCT4017D-Q100 equivalent, this device serves as a TTL-level-compatible decade counter for deterministic state sequencing, automotive lighting control, and modular timer design where precise decoded output timing and AEC-Q100 Grade 1 qualification are required.

Technical Context

The 74HCT4017D-Q100 implements a 5-flip-flop Johnson counter architecture with internal decoding logic that maps 5-bit ring states to 10 distinct active-HIGH decoded outputs. Its dual-clock interface enables flexible triggering: CP0 advances on LOW-to-HIGH while CP1 is LOW; CP1 advances on HIGH-to-LOW while CP0 is HIGH - enabling bidirectional cascade control without external logic.

It features automatic illegal-state recovery within ≤11 clocks, TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V), and a dedicated Q5-9 carry output that goes LOW during states 5–9 to drive CP0 of the next stage in multi-counter chains. The MR input is asynchronous and overrides all clock activity.

Key Specifications

Pinout & Package

74HCT4017D-Q100 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with gull-wing leads and standard JEDEC MS-012 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4017D-Q100 and SN74LV4017APWR, the 74HCT4017D-Q100 uniquely bridges legacy 5 V TTL systems and modern automotive AEC-Q100 requirements - offering guaranteed TTL-level compatibility, tighter propagation delay consistency over temperature, and validated high-temp reliability without sacrificing pinout or functional equivalence.

Availability

74HCT4017D-Q100 is available at Aetrix Electronics and suitable for automotive dashboard sequencing, LED chaser displays, and modular timer modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT4017D-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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions, with deep expertise in automotive qualification and manufacturing scalability.

The 74HCT4017D-Q100 belongs to Nexperia's automotive-qualified HC/HCT logic portfolio, designed specifically for deterministic timing, fault-tolerant sequencing, and seamless integration into AEC-Q100-compliant vehicle ECUs and human-machine interface subsystems.

FAQ

What is the maximum clock frequency supported by the 74HCT4017D-Q100?

The 74HCT4017D-Q100 supports a maximum clock frequency of 24 MHz at VCC = 4.5 V and Tamb = +125 °C, as specified in Table 7 (fmax = 20 MHz min, 24 MHz typ). This limit applies to both CP0 and CP1 inputs under recommended operating conditions with CL = 50 pF.

Can the 74HCT4017D-Q100 be cascaded to create a modulo-20 counter?

Yes - connect Q5-9 (pin 12) of the first device to CP0 (pin 14) of the second device. Q5-9 goes LOW during states 5–9, enabling the second counter only after the first reaches state 5. This yields exactly 20 unique decoded states (Q0–Q9 of both devices) with no gaps or overlaps.

Does the MR input require debouncing in automotive environments?

No - MR is fully asynchronous and internally synchronized to avoid metastability. However, in noisy environments, a 100 nF ceramic capacitor between MR and GND is recommended to suppress EMI-induced glitches, especially when MR is driven by mechanical switches or long harness traces.

How does the 74HCT4017D-Q100 handle illegal Johnson counter states?

The device includes internal auto-correction circuitry that detects invalid 5-bit states (e.g., due to power-up uncertainty or ESD upset) and restores valid Johnson sequence within ≤11 clock cycles - no external intervention or reset pulse is required for recovery.