STMicroelectronics HCF4094YM013TR

Overview

HCF4094YM013TR from STMicroelectronics is an automotive-grade 8-stage serial-in, parallel-out shift register with storage latch and 3-state outputs in SO-16 package. It operates up to 5 MHz at 10 V, supports 3–20 V supply range, features dual cascading serial outputs (QS on +CLK edge, Q'S on –CLK edge), and delivers ±2.4 mA output drive at 15 V for bus interfacing in automotive control modules.

For engineers reviewing the HCF4094YM013TR datasheet, HCF4094YM013TR pinout, HCF4094YM013TR application, or HCF4094YM013TR equivalent, key selection criteria include strobe-synchronized parallel latching, dual-edge serial cascade capability, AEC-Q100 qualification (-40 °C to +125 °C), and 3-state bus compatibility under wide VDD conditions.

Technical Context

The device implements two synchronized shift paths: one 8-bit shift register feeding an independent 8-bit storage latch, with parallel outputs enabled only when OUTPUT ENABLE is high. Strobe input controls transfer from shift register to latch on its high level - not edge-triggered - enabling synchronous data capture across multiple devices.

It provides two serial outputs: QS delivers shifted data on each positive clock edge (optimized for fast-rising clocks), while Q'S mirrors the same data on the subsequent negative edge (enabling reliable cascade with slow-rising clocks). Both outputs support daisy-chaining without external logic.

Key Specifications

Pinout & Package

Supplied in SO-16 (Small Outline, 16-pin) package with 1.27 mm pitch, 10.0 × 6.0 mm body, and gull-wing leads - compatible with standard reflow soldering and automated PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4094BE and SN74HC595DR, HCF4094YM013TR uniquely combines AEC-Q100 qualification, dual-edge serial outputs for robust cascading, and 3–20 V operation - making it the sole choice for automotive body electronics requiring guaranteed performance across battery voltage transients and thermal extremes.

Availability

HCF4094YM013TR is available at Aetrix Electronics and suitable for automotive body control units, industrial programmable logic controllers, and consumer remote control hubs requiring stable component supply across extended temperature and voltage ranges.

Supply support for HCF4094YM013TR 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

This device belongs to ST's HCF4000 series of high-voltage CMOS logic ICs, engineered specifically for automotive and industrial applications demanding wide supply range, latch-based data retention, and bus-compatible 3-state outputs.

FAQ

What is the function of the STROBE input?

The STROBE input is a level-sensitive control that transfers the current contents of the 8-bit shift register into the storage latch. When STROBE is high, data present in the shift stages is captured and held; outputs reflect this latched data only when OUTPUT ENABLE is also high. This decouples serial loading from parallel output timing, enabling precise synchronization across multiple cascaded devices.

Can HCF4094YM013TR operate at 3.3 V?

Yes - the device is specified for VDD = 3 V minimum per Table 5 (Recommended Operating Conditions). At 3.3 V, typical propagation delays increase to ~1.2 µs (vs. 190 ns at 15 V), and output drive drops to ±0.36 mA, but all logic functions remain fully operational and compliant with TTL/CMOS input thresholds. It is commonly used in mixed-voltage systems with 3.3 V controllers driving 12 V loads via external drivers.

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

QS outputs data on each positive clock edge, while Q'S outputs the identical data on the subsequent negative edge. This allows downstream devices to sample valid data using either edge - eliminating setup/hold violations caused by clock rise-time variations across PCB traces. In long daisy chains, designers can select the edge best matched to local clock slew rate without adding delay compensation circuitry.

Is OUTPUT ENABLE active-high or active-low?

OUTPUT ENABLE is active-high: when logic high, the Q1–Q8 outputs drive their latched values; when logic low, all eight outputs enter high-impedance state. This enables direct connection to shared data buses without external isolation logic. The pin has no internal pull-up or pull-down, so external biasing is required in floating-bus configurations to prevent undefined states during power-up or reset.