STMicroelectronics M74HC4017B1R

Overview

M74HC4017B1R from STMicroelectronics is a high-speed CMOS decade counter/divider with 10 decoded outputs, a carry output, clock enable, and master clear. It operates from 2V to 6V, delivers 21 ns typical propagation delay at 6V, supports 4 mA output drive, and features symmetrical output impedance and balanced tPLH/tPHL. It is used in sequential LED drivers, timing sequencers, and low-power industrial control logic.

For engineers reviewing the M74HC4017B1R datasheet, M74HC4017B1R pinout, M74HC4017B1R application, or M74HC4017B1R equivalent, key selection criteria include decoded output count (10), active-HIGH reset, active-LOW clock enable, carry output polarity (active LOW), and DIP-16 package compatibility with legacy 74-series layouts.

Technical Context

The M74HC4017B1R implements a 5-stage Johnson counter architecture that generates ten mutually exclusive decoded outputs (Q0–Q9), each asserted for exactly one clock cycle in sequence. Its carry output (COUT) transitions HIGH after Q9 deasserts, enabling cascaded multi-decade counting when paired with CKEN.

It uses silicon gate C2MOS technology for low static current (4 µA max at 25°C) and high noise immunity (VNIH/VNIL = 28% VCC min). All inputs include ESD and transient voltage protection, and timing is edge-triggered on the LOW-to-HIGH clock transition with setup/hold times specified down to 3 ns at 6V.

Key Specifications

Pinout & Package

Package: Plastic DIP-16 (0.300" width), JEDEC MS-001, body dimensions 20.0 × 8.5 mm, lead pitch 2.54 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HC4017E and SN74HC4017N, the M74HC4017B1R offers the highest verified maximum clock frequency (29 MHz) and lowest quiescent current (4 µA), making it optimal for timing-critical, energy-constrained industrial sequencers requiring long-term reliability.

Availability

M74HC4017B1R is available at Aetrix Electronics and suitable for LED chaser sequencers, industrial timer modules, automotive dashboard indicators, and appliance cycle controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for M74HC4017B1R 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The M74HC4017B1R belongs to ST's high-speed CMOS logic family, engineered for pin compatibility with legacy 74-series devices while delivering lower power, higher noise immunity, and extended temperature operation.

FAQ

What is the function of the COUT pin on the M74HC4017B1R?

The COUT (Carry Output) pin is active LOW and transitions HIGH only after Q9 goes LOW, signaling completion of the 10-count cycle. It is designed to drive the CKEN input of a cascaded M74HC4017B1R stage, enabling multi-digit counting without external logic. Its timing is guaranteed relative to Q9 with tPHL ≤ 50 ns at 6 V.

Can the M74HC4017B1R operate from a 3.3 V supply?

Yes - the M74HC4017B1R is fully specified for VCC = 2 V to 6 V, including 3.3 V operation. At 3.3 V, it delivers tPD ≈ 33 ns (typ.), VOH ≥ 3.13 V (at IO = −4 mA), and VOL ≤ 0.33 V (at IO = 4 mA), ensuring interoperability with 3.3 V logic families without level translation.

How does the CLEAR input interact with the clock signal?

The CLEAR input is asynchronous and active HIGH: asserting it immediately forces all Q0–Q9 LOW and resets the internal Johnson counter to its initial state (Q0 = HIGH on next valid clock edge). It overrides all clock and CKEN activity, and minimum pulse width is 6 ns at VCC = 6 V.

Is the M74HC4017B1R RoHS compliant and halogen-free?

Yes - the M74HC4017B1R (DIP-16 package, order code B1R) is manufactured per STMicroelectronics' standard RoHS-compliant process and meets IEC 61249-2-21:2011 for halogen-free materials. The device carries the "E" suffix in compliance marking and is rated for lead-free soldering at 260°C peak.