Nexperia USA Inc. 74HCT4017D,653

Overview

74HCT4017D,653 from Nexperia is a TTL-level-compatible 5-stage Johnson decade counter IC with 10 decoded active-HIGH outputs (Q0–Q9), one carry output (Q5-9, active LOW), dual edge-triggered clock inputs (CP0: LOW-to-HIGH; CP1: HIGH-to-LOW), and asynchronous master reset (MR, active HIGH). It operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C, and delivers 46 ns typical propagation delay at 4.5 V/50 pF - used in sequential LED drivers, divide-by-N timing circuits, and industrial state machines.

For engineers reviewing the 74HCT4017D,653 datasheet, 74HCT4017D,653 pinout, 74HCT4017D,653 application, or 74HCT4017D,653 equivalent, this device serves as a robust, temperature-hardened decade counter for discrete logic control where precise decoded output sequencing and asynchronous reset are required - especially in legacy TTL-interfaced systems and low-complexity timing subsystems.

Technical Context

The 74HCT4017D,653 implements a 5-flip-flop Johnson counter architecture with internal decoding logic that maps the 10-state ring to individual Q0–Q9 outputs. Its dual-clock interface enables flexible triggering: CP0 advances on rising edge when CP1 = LOW; CP1 advances on falling edge when CP0 = HIGH - supporting both synchronous and cascaded configurations.

Automatic illegal-state recovery corrects invalid codes within ≤11 clocks. The Q5-9 output goes LOW during states 5–9, enabling direct carry chaining without external logic. Inputs include clamp diodes for overvoltage tolerance, and MR forces Q0 = HIGH and Q1–Q9 = LOW regardless of clock state.

Key Specifications

Pinout & Package

74HCT4017D,653 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 - compatible with automated SMT placement and reflow profiles per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4017D,653 and CD4017BE, the 74HCT4017D,653 uniquely balances TTL compatibility, industrial temperature range, and hardware carry support - making it optimal for new designs requiring robust, drop-in replaceability in 5 V logic ecosystems.

Availability

74HCT4017D,653 is available at Aetrix Electronics and suitable for industrial timer modules, automotive lighting sequencers, LED display controllers, and legacy system upgrades requiring stable component supply across extended temperature ranges.

Supply support for 74HCT4017D,653 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, reliable logic, analog, and discrete components - focused on efficiency, miniaturization, and automotive-grade quality.

The 74HCT4017D,653 belongs to Nexperia's 74HCT logic family, engineered specifically for TTL-compatible interfacing in industrial and automotive applications where robustness, wide temperature operation, and deterministic timing are mandatory.

FAQ

What is the function of the Q5-9 output?

The Q5-9 output is an active-LOW carry signal that goes LOW during counter states 5 through 9. It is designed to drive the CP0 input of a downstream 74HCT4017D,653 for cascading decade counters into larger modulus counters (e.g., modulo-100). This eliminates external combinational logic and ensures synchronized carry propagation.

Can CP0 and CP1 be used simultaneously?

No - simultaneous assertion of valid transitions on both CP0 and CP1 violates the functional table and may cause unpredictable or extra counting. The device requires CP1 = LOW when using CP0 (rising edge), and CP0 = HIGH when using CP1 (falling edge). Cross-coupling these clocks without proper gating risks metastability.

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

MR is fully asynchronous and overrides all clock activity: when MR = HIGH, the counter immediately resets to state Q0 (Q0 = HIGH, Q1–Q9 = LOW, Q5-9 = HIGH), regardless of CP0 or CP1 state or transitions. No clock edge is required - reset occurs within tPHL (≤69 ns at 4.5 V) after MR assertion.

Is the 74HCT4017D,653 suitable for driving LEDs directly?

Yes - each decoded output (Q0–Q9) sources or sinks up to ±4 mA at VCC = 4.5 V while maintaining VOH ≥ 3.98 V and VOL ≤ 0.33 V. This is sufficient to drive low-current indicator LEDs (e.g., 2 mA @ 1.8 V VF) with a series resistor, though high-brightness or multiplexed arrays require external drivers.