STMicroelectronics M74HC164RM13TR

Overview

M74HC164RM13TR from STMicroelectronics is a high-speed CMOS 8-bit serial-in, parallel-out (SIPO) shift register in TSSOP-14 package, operating from 2V to 6V supply, with 62 MHz max clock frequency (typ. at VCC = 6V), 4 µA max quiescent current at 25°C, and asynchronous active-low master clear. It enables serial-to-parallel data conversion in microcontroller I/O expansion and LED matrix drivers.

For engineers reviewing the M74HC164RM13TR datasheet, M74HC164RM13TR pinout, M74HC164RM13TR application, or M74HC164RM13TR equivalent, key selection criteria include propagation delay symmetry (tPLH ≅ tPHL), dual-input NAND logic for serial data enable control, wide voltage range compatibility, and TSSOP-14 footprint suitability for space-constrained PCBs.

Technical Context

The M74HC164RM13TR implements an edge-triggered, synchronous SIPO architecture with dual serial data inputs (A and B) whose NAND output enters QA on each rising clock edge. Its asynchronous CLEAR input forces all Q outputs low independently of clock or data state.

It features symmetrical output drive capability (|IOH| = IOL = 4 mA min), high noise immunity (VNIH/VNIL = 28% VCC min), and balanced propagation delays optimized for timing-critical serial data latching across industrial and embedded control interfaces.

Key Specifications

Pinout & Package

Package: TSSOP-14 (4.9 × 6.4 mm, 0.65 mm pitch), RoHS-compliant, surface-mount, moisture-sensitive level 1 (MSL1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC164DR and 74LVC164APW,118, the M74HC164RM13TR uniquely balances 2–6 V operation, 62 MHz speed, and TSSOP-14 compactness-making it optimal for mixed-voltage, space-constrained, and medium-speed serial expansion tasks.

Availability

M74HC164RM13TR is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller I/O expanders, industrial PLC output modules, and consumer appliance control panels requiring stable component supply and long-term manufacturability.

Supply support for M74HC164RM13TR 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The M74HC164 belongs to ST's high-speed HC logic family, engineered for robust performance across extended temperature ranges (-55°C to +125°C) and demanding industrial control applications.

FAQ

Can M74HC164RM13TR operate reliably at 5.5 V?

Yes. The device is fully specified from 2 V to 6 V, with all DC and AC parameters guaranteed across this range. At 5.5 V, VOH remains ≥5.3 V (IO = –4 mA), VOL ≤0.33 V (IO = 4 mA), and fMAX exceeds 50 MHz - confirming robust operation within 5 V system margins.

What happens if both A and B inputs are left floating?

Leaving A or B floating violates the absolute maximum rating for VI (–0.5 V to VCC + 0.5 V) and risks undefined logic states due to internal protection diode conduction. Per datasheet guidance, unused inputs must be tied HIGH (e.g., via 10 kΩ pull-up) or connected together to ensure predictable NAND behavior and avoid increased ICC.

Is the CLEAR input truly asynchronous and glitch-free?

Yes. The CLEAR signal propagates directly to all flip-flop reset inputs without clock dependency. Test data shows tPHL(CLR→Q) = 17 ns (typ. at VCC = 6 V), with no minimum pulse width violation down to 9 ns - confirming reliable, race-free reset even during clock transitions or data changes.

Does M74HC164RM13TR support hot insertion or live swapping?

No. The device lacks Ioff protection or power-off isolation; applying VCC before GND or inserting while powered risks latch-up or excessive IIK current. For hot-swap applications, external series resistors (≥100 Ω) and controlled power sequencing are required per ST Application Note AN2012.