STMicroelectronics HCF4094M013TR

Overview

HCF4094M013TR from STMicroelectronics is an 8-stage CMOS serial-in, parallel-out shift-and-store bus register with 3-state outputs, designed for bus-oriented digital control systems. It features synchronous serial cascading via dual-edge-triggered QS/Q'S outputs, operates up to 5 MHz at 10 V, supports 3–20 V supply range, and delivers symmetrical output drive (±3.2 mA at 10 V) in SO-16 package for industrial and automotive remote control holding registers.

For engineers reviewing the HCF4094M013TR datasheet, HCF4094M013TR pinout, HCF4094M013TR application, or HCF4094M013TR equivalent, key selection criteria include its dual serial output timing (QS on +CLK, Q'S on –CLK), strobe-controlled latch-to-output propagation (100–580 ns), 3-state bus interface capability, and extended temperature operation from –55 °C to +125 °C.

Technical Context

The HCF4094 implements a two-stage pipeline: an 8-bit shift register followed by an independent 8-bit storage latch, both controlled by separate CLOCK and STROBE inputs. Data advances on each positive clock edge; latching into the output register occurs only when STROBE is high.

Its dual serial outputs enable daisy-chaining without external logic: QS provides data one stage earlier on the rising edge, while Q'S delivers the same data on the falling edge-enabling robust cascading under varying clock slew rates. All 8 parallel outputs are individually buffered and 3-state enabled via OUTPUT ENABLE.

Key Specifications

Pinout & Package

Supplied in a 16-pin Small Outline (SO-16) package with standard 1.27 mm pitch, gull-wing leads, and JEDEC MS-012AC mechanical outline (D = 10.0 mm, E = 6.0 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4094BE and 74HC595, the HCF4094M013TR uniquely combines SO-16 packaging, –55 °C to +125 °C qualification, dual-edge serial outputs, and 3–20 V operation-making it the only choice for ruggedized, bus-oriented industrial and automotive control registers requiring deterministic timing and wide supply flexibility.

Availability

HCF4094M013TR is available at Aetrix Electronics and suitable for industrial remote I/O, automotive body control modules, and consumer appliance UI subsystems requiring stable component supply across extended temperature and voltage ranges.

Supply support for HCF4094M013TR 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, delivering intelligent power, sensing, connectivity, and microcontroller solutions for industrial, automotive, and consumer markets.

The HCF4094 belongs to ST's legacy high-voltage CMOS logic family, engineered specifically for robust serial-to-parallel conversion in electrically noisy, thermally demanding environments where reliability trumps raw speed.

FAQ

What is the minimum pulse width required on the STROBE input?

The minimum STROBE high pulse width is 70 ns at VDD = 15 V, 80 ns at VDD = 10 V, and 200 ns at VDD = 5 V, as specified in Table 7. Shorter pulses risk incomplete transfer from shift register to storage latch, causing missing or corrupted parallel outputs.

Can HCF4094M013TR drive LEDs directly?

Yes - each Q1–Q8 output can sink up to 6.8 mA (at VDD = 15 V) or source –3.2 mA (at VDD = 10 V), sufficient for low-current indicator LEDs with appropriate series resistors. For higher-current loads, external drivers are recommended.

How does the dual serial output (QS and Q'S) improve cascading reliability?

QS delivers data on the rising clock edge, while Q'S delivers identical data on the falling edge. This allows downstream devices to sample valid data regardless of whether the clock signal has fast rise/slow fall or slow rise/fast fall characteristics - eliminating setup/hold violations in long daisy chains.

Is OUTPUT ENABLE compatible with open-drain microcontroller pins?

Yes - OUTPUT ENABLE is CMOS-compatible with logic-high thresholds scaling with VDD (VIH ≥ 7 V at VDD = 10 V). An open-drain MCU pin pulled up to VDD can directly drive it; no level-shifting is needed, provided the MCU's pull-up voltage matches the HCF4094's VDD.