STMicroelectronics M74HC4094YRM13TR

Overview

M74HC4094YRM13TR from STMicroelectronics is an automotive-grade 8-bit serial-in/parallel-out (SIPO) shift latch register with 3-state outputs, fabricated in silicon gate C2MOS technology. It features f_MAX = 80 MHz (typ.) at V_CC = 6 V, I_CC ≤ 4 μA (max.) at 25 °C, and operates across V_CC = 2–6 V. Used in automotive dashboard LED drivers and industrial PLC I/O expansion modules where cascaded data latching and low-power operation are required.

For engineers reviewing the M74HC4094YRM13TR datasheet, M74HC4094YRM13TR pinout, M74HC4094YRM13TR application, or M74HC4094YRM13TR equivalent, this device supports high-speed serial-to-parallel conversion with strobe-controlled latching, 3-state output buffering, and AEC-Q100 qualified operation for harsh-temperature environments.

Technical Context

The device integrates an 8-bit shift register and an 8-bit latch stage, with serial data shifted on the rising edge of CLOCK and transferred to QS' on the subsequent falling edge. The STROBE input controls latching of shift register contents into the output latch on its falling edge, enabling synchronized parallel output updates.

Outputs Q1–Q8 are driven through a 3-state buffer enabled by OE; when OE is low, all outputs enter high-impedance state. Input protection includes CDM = 1 kV, HBM = 2 kV, and MM = 200 V ESD robustness, supporting reliable operation in noisy automotive and industrial settings.

Key Specifications

Pinout & Package

Package: SO16 (Small Outline, 16-pin), 3.9 mm × 9.9 mm body, ECOPACK® compliant, automotive-grade moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC595PWR and 74LV4094PW,118, the M74HC4094YRM13TR uniquely delivers AEC-Q100 Grade 2 qualification, QS'-enabled daisy-chain precision, and sub-4 μA quiescent current-making it the sole choice for automotive instrument clusters and mission-critical industrial controllers requiring guaranteed parametric stability across −40 °C to +125 °C.

Availability

M74HC4094YRM13TR is available at Aetrix Electronics and suitable for automotive dashboard lighting, industrial PLC I/O expansion, and medical diagnostic equipment UI requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for M74HC4094YRM13TR 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 analog, mixed-signal, power, and microcontroller solutions for automotive, industrial, and consumer markets.

The M74HC4094 belongs to ST's high-reliability HC logic family, engineered specifically for automotive and industrial applications demanding extended temperature operation, robust ESD tolerance, and long-term supply assurance.

FAQ

What is the maximum clock frequency supported by M74HC4094YRM13TR at 3.3 V?

At V_CC = 3.3 V, the maximum clock frequency is 48 MHz (min.) and 66 MHz (typ.), per Table 7 of the datasheet. This is derived from AC characterization at −40 °C to +85 °C with CL = 50 pF and input tr/tf ≤ 15 ns. Operation above 66 MHz is not guaranteed and may result in setup/hold violations or metastability.

Can M74HC4094YRM13TR be used without connecting the QS' pin?

Yes - QS' is optional for non-cascaded configurations. When unused, QS' should be left floating or terminated to V_CC/GND via ≥10 kΩ resistor to prevent noise coupling. QS remains fully functional for single-device operation or basic daisy-chaining where only one serial output is needed.

Does the STROBE input require a minimum pulse width at −40 °C?

Yes - at −40 °C and V_CC = 2 V, the minimum STROBE pulse width is 95 ns (low or high), per Table 7. At V_CC = 6 V and −40 °C, it reduces to 16 ns. Failure to meet this spec risks incomplete latching or metastable output states due to insufficient internal node charging.

Is the SO16 package RoHS and REACH compliant?

Yes - the SO16 package carries ECOPACK®2 certification, confirming full compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Lead finish is matte tin, and halogen content is below 900 ppm total, verified per JEDEC J-STD-709B.