STMicroelectronics HCF4014BEY

Overview

HCF4014BEY from STMicroelectronics is a B-series CMOS 8-stage synchronous static shift register with parallel/serial input and serial output, featuring D-type master-slave flip-flops, three buffered outputs (Q6, Q7, Q8), and dual-mode control via PARALLEL/SERIAL CONTROL pin. It operates up to 12 MHz (typ.) at VDD = 10 V, supports 3–20 V supply range, and delivers ±2.4 mA output drive at VDD = 15 V for industrial logic interfacing.

For engineers reviewing the HCF4014BEY datasheet, HCF4014BEY pinout, HCF4014BEY application, or HCF4014BEY equivalent, key selection criteria include static operation capability, wide VDD tolerance (3–20 V), low input leakage (≤100 nA at 18 V), propagation delay ≤120 ns at 15 V, and compatibility with legacy 4000B-series timing and control systems.

Technical Context

The HCF4014BEY implements a fully static, edge-triggered 8-bit shift register using cascaded D-type master-slave flip-flops. Mode selection between serial shift-in and parallel jam-in is controlled synchronously on the rising edge of CLOCK, with PARALLEL/SERIAL CONTROL determining data path routing without internal latching delays.

It provides three dedicated buffered serial outputs (Q6, Q7, Q8) derived directly from internal register stages, enabling multi-tap serial monitoring. Output drive strength scales with VDD-IOH = –2.4 mA and IOL = +2.4 mA at 15 V-ensuring robust fan-out into standard CMOS loads across its full operating voltage range.

Key Specifications

Pinout & Package

Package: 16-pin plastic DIP (0.300" width), JEDEC MS-001, body dimensions 20.0 × 8.5 mm. Pin 16 = VDD, Pin 8 = VSS, all pins rated for –0.5 V to VDD + 0.5 V.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit static shift register applications.

Compared with CD4014BE and MC14014BDR2G, the HCF4014BEY uniquely combines DIP-16 packaging, 20 V absolute maximum rating, and 2.5 V noise margin at 15 V - making it the only choice for retrofitting high-voltage industrial panels with through-hole assembly.

Availability

HCF4014BEY is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy system data serialization, and multiplexed display driver interface requiring stable component supply and long-term obsolescence mitigation.

Supply support for HCF4014BEY 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 analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The HCF4014BEY belongs to ST's legacy 4000B-series CMOS logic family, engineered specifically for robust, wide-supply-voltage operation in industrial control, instrumentation, and repair-replacement contexts where reliability and pin compatibility are critical.

FAQ

Is HCF4014BEY compatible with 5 V microcontrollers?

Yes. The HCF4014BEY operates down to 3 V and meets standard 5 V CMOS logic thresholds: VIH = 3.5 V min and VIL = 1.5 V max at VDD = 5 V. Its outputs swing rail-to-rail (VOH = 4.95 V, VOL = 0.05 V), ensuring clean interfacing with 5 V MCUs without level translation.

What is the maximum capacitive load the outputs can drive?

The outputs are characterized with CL = 50 pF in the datasheet, and propagation delay increases linearly with load capacitance. For reliable operation beyond 50 pF, reduce clock frequency per the fCL derating curve - e.g., at 100 pF, max usable frequency drops to ~8 MHz at VDD = 10 V.

Does HCF4014BEY support asynchronous reset or clear?

No. The HCF4014BEY has no dedicated reset or clear input. State initialization must be performed via serial shifting of zeros or parallel jamming of known values using the existing PI1–PI8 inputs and CLOCK/PARALLEL-SERIAL CONTROL sequencing.

Can multiple HCF4014BEY devices be cascaded for longer registers?

Yes. Connect Q8 of one device to SERIAL IN of the next, synchronize all CLOCK and PARALLEL/SERIAL CONTROL lines, and assert parallel load only on the first device. Propagation delay accumulates linearly, so total tPHL for N devices is N × 120 ns (max at VDD = 15 V).