STMicroelectronics HCF4015BEY

Overview

HCF4015BEY from STMicroelectronics is a dual 4-stage static shift register IC implementing two independent serial-input/parallel-output registers using D-type master-slave flip-flops. It operates up to 12 MHz (typ.) at VDD = 10 V, supports 3–20 V supply range, features independent CLOCK/RESET/DATA per register, and delivers Qn outputs from all eight stages. Used in digital control logic for LED multiplexing, address latching, and data serialization in industrial timing systems.

For engineers reviewing the HCF4015BEY datasheet, HCF4015BEY pinout, HCF4015BEY application, or HCF4015BEY equivalent, key selection criteria include static operation capability, dual-register independence, VDD tolerance up to 20 V, noise immunity ≥2.5 V at 15 V, and DIP-16 package compatibility with legacy through-hole PCB layouts.

Technical Context

The HCF4015BEY integrates two fully static, edge-triggered 4-bit shift registers sharing no internal signal paths-each has dedicated CLOCK A/B, RESET A/B, and DATA A/B inputs. All eight flip-flops are master-slave D-types, ensuring metastability suppression and clean state transfer on positive clock edges.

It uses standard B-series CMOS process with guaranteed operation from –55 °C to +125 °C, 100 nA max input leakage at 18 V, and 1.36 mA output drive (IOH) at VDD = 5 V. Propagation delay ranges from 60 ns (min) to 400 ns (max), scaling inversely with supply voltage.

Key Specifications

Pinout & Package

Package: 16-pin plastic DIP (dual in-line package), 0.3-inch body width, through-hole mounting compatible with IPC-7351A footprint DIP16_W10.2MM.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-bit static shift register applications.

Compared with CD4015BE and MC14015BCP, the HCF4015BEY offers superior thermal range, tighter propagation delay control, and production-tested quiescent current-making it the preferred choice for high-reliability, wide-supply, and extended-temperature applications where register stability is non-negotiable.

Availability

HCF4015BEY is available at Aetrix Electronics and suitable for LED multiplexing control, industrial address latching, and legacy bus expansion requiring stable component supply across extended temperature and voltage ranges.

Supply support for HCF4015BEY 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

The HCF4015BEY belongs to ST's legacy HCF4000B series of radiation-hardened, high-voltage-tolerant CMOS logic ICs engineered for reliability in harsh environments and long-lifecycle industrial systems.

FAQ

What is the maximum clock frequency supported by HCF4015BEY at 5 V supply?

The HCF4015BEY supports a maximum clock frequency of 6 MHz (typical) and 3 MHz (minimum) at VDD = 5 V, as specified in the Dynamic Electrical Characteristics table. This limit arises from propagation delay scaling and ensures reliable setup/hold timing for serial data shifting across all eight stages without metastability.

Can HCF4015BEY operate with a 2.5 V supply?

No. The recommended operating supply voltage starts at 3 V per JEDEC JESD13B and ST's datasheet specifications. At 2.5 V, the device may fail to meet VOH/VOL thresholds, exhibit increased propagation delay variability, and violate noise margin requirements - operation below 3 V is not characterized or guaranteed.

Is HCF4015BEY pin-compatible with CD4015BE?

Yes - HCF4015BEY and CD4015BE share identical pin numbering, pin functions, and DIP-16 mechanical footprint. Both implement dual 4-bit serial-in/parallel-out registers with independent clocks and resets. However, HCF4015BEY offers tighter timing specs and extended temperature range.

Does HCF4015BEY require external pull-up resistors on its outputs?

No. The outputs are push-pull CMOS and do not require external pull-ups for standard logic interfacing. Pull-ups are only needed if driving open-drain or wired-OR buses, or if interfacing with TTL inputs requiring higher input current - in which case 10 kΩ resistors to VDD are typical.