Nexperia USA Inc. 74HC4017BQ,115

Overview

74HC4017BQ,115 from Nexperia is a CMOS 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 - operating from 2.0 V to 6.0 V supply, specified for -40 °C to +125 °C, with propagation delay as low as 18 ns at VCC = 6.0 V and CL = 50 pF. It serves as a sequential state generator in timing, counting, and LED sequencing circuits.

For engineers reviewing the 74HC4017BQ,115 datasheet, 74HC4017BQ,115 pinout, 74HC4017BQ,115 application, or 74HC4017BQ,115 equivalent, this device supports precise decade division, cascaded counter expansion, asynchronous reset-driven pulse generation, and TTL/CMOS-level interface flexibility depending on variant selection.

Technical Context

The 74HC4017BQ implements a 5-stage Johnson counter architecture that auto-corrects illegal states within ≤11 clocks. Its dual-clock input logic enables flexible triggering: CP0 advances on LOW-to-HIGH while CP1 = LOW; CP1 advances on HIGH-to-LOW while CP0 = HIGH - preventing spurious counts during cascading.

Carry output Q5-9 goes LOW during states 5–9, enabling direct drive of CP0 on the next stage. MR is asynchronous and active-HIGH, forcing Q0 = HIGH and all other outputs LOW regardless of clock phase - critical for deterministic initialization in timer and sequencer designs.

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, 16-terminal no-lead thermal-enhanced quad flat layout with exposed thermal pad (GND-connected recommended).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT4017BQ,115 and CD4017BE, the 74HC4017BQ,115 offers optimal balance of speed, low-voltage operation, thermal efficiency, and modern robustness - making it preferred for new SMT designs requiring sub-20 ns timing and -40 °C to +125 °C reliability.

Availability

74HC4017BQ,115 is available at Aetrix Electronics and suitable for LED sequencers, industrial timer modules, and cascaded counter arrays requiring stable component supply across automotive, industrial automation, and embedded instrumentation programs.

Supply support for 74HC4017BQ,115 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, reliable logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC4017BQ belongs to Nexperia's HC logic family - engineered for low-power, high-noise-immunity decade counting in space-constrained, thermally demanding applications.

FAQ

What is the difference between 74HC4017BQ and 74HCT4017BQ?

The 74HC4017BQ features CMOS-level inputs (VIH ≥ 70% VCC), supporting 2.0–6.0 V operation, while the 74HCT4017BQ has TTL-compatible inputs (VIH = 2.0 V min) and operates strictly at 4.5–5.5 V. Both share identical pinout, function, and timing - choice depends on host system voltage and logic family.

Can 74HC4017BQ drive LEDs directly?

Yes - each decoded output (Q0–Q9) sources up to 4.0 mA at VCC = 4.5 V and sinks up to 4.0 mA, sufficient to illuminate standard 2 mA LEDs with series resistors. For higher brightness or multiple LEDs, add buffer transistors or dedicated drivers.

How does the Q5-9 carry output work in cascading?

Q5-9 goes LOW only during count states 5 through 9. When wired to CP0 of a second 74HC4017BQ, it delivers five clock pulses per decade - advancing the second counter once every ten counts of the first, enabling clean 100-state sequences without race conditions.

Is the thermal pad on the DHVQFN16 package electrically connected?

No - the exposed thermal pad (terminal 1 index area) is not internally connected to any signal. It must be soldered and tied to PCB GND for thermal performance, but has no electrical function. Do not leave it floating in production assemblies.