STMicroelectronics M74HC192RM13TR

Overview

M74HC192RM13TR from STMicroelectronics is a high-speed CMOS synchronous up/down decade counter in TSSOP-16 package, featuring dual clock inputs (UP/DOWN), asynchronous parallel load (active-low LOAD), active-high CLEAR, and complementary carry/borrow outputs for cascading. It operates from 2V to 6V, delivers 55 MHz max clock frequency at 6V, and supports presettable divide-by-n counting in industrial timing and digital control systems.

For engineers reviewing the M74HC192RM13TR datasheet, M74HC192RM13TR pinout, M74HC192RM13TR application, or M74HC192RM13TR equivalent, this device is selected for precise bidirectional counting, ripple-free cascaded counter chains, and low-power synchronous logic in embedded instrumentation and programmable logic interfaces.

Technical Context

The M74HC192RM13TR implements a fully synchronous 4-bit binary-coded decimal (BCD) counter with edge-triggered UP and DOWN clocks, where counting direction is determined solely by which clock input receives the rising edge while the other remains HIGH. All state changes occur simultaneously on the active clock edge, eliminating ripple propagation delays across stages.

It integrates asynchronous functions: active-HIGH CLEAR resets all Q outputs to LOW; active-LOW LOAD enables parallel data entry (A–D) independent of clock activity. Carry (active-LOW) and Borrow (active-LOW) outputs provide standardized cascade signaling for multi-digit up/down counting without external logic.

Key Specifications

Pinout & Package

TSSOP-16 (Thin Shrink Small Outline Package), 4.4 mm × 5.0 mm body, 0.65 mm pitch, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous up/down decade counter applications.

Compared with SN74HC192N and CD74HC192M, the M74HC192RM13TR offers superior thermal efficiency and PCB area savings in TSSOP-16, making it optimal for compact, thermally constrained industrial modules requiring high-reliability surface-mount assembly.

Availability

M74HC192RM13TR is available at Aetrix Electronics and suitable for digital panel meters, programmable logic controller counter modules, and industrial timer/sequencer designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for M74HC192RM13TR 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 microcontrollers, power management ICs, analog chips, and discrete components for automotive, industrial, and consumer markets.

The M74HC192 belongs to ST's legacy HC logic family - engineered for robustness, wide supply range, and interoperability with TTL and CMOS systems in industrial control and instrumentation applications.

FAQ

What is the minimum pulse width required on COUNT UP and COUNT DOWN inputs?

At VCC = 6 V, the minimum high- and low-time for COUNT UP/DOWN inputs is 17 ns each (tW(H)/tW(L)). At VCC = 4.5 V, it is 25 ns; at VCC = 2 V, it increases to 125 ns. These values ensure reliable edge detection and prevent metastability in synchronous state transitions.

Can M74HC192RM13TR operate reliably at 3.3 V supply?

Yes - the device is fully specified from 2 V to 6 V. At 3.3 V, it guarantees VIH ≥ 2.31 V, VIL ≤ 1.09 V, tPLH/tPHL ≤ 48 ns (max), and fMAX ≥ 24 MHz (min), meeting requirements for mixed-voltage 3.3 V systems interfacing with 74HC-level logic.

How does the CARRY output behave during an UP count from 9 to 0?

The CARRY output asserts a clean, active-LOW pulse (typically 16–19 ns wide at VCC = 6 V) precisely on the rising edge that causes the transition from 9 to 0. The pulse width and timing are guaranteed across temperature and voltage, enabling reliable synchronization of downstream counters.

Is there any setup or hold time requirement for DATA inputs relative to LOAD?

Yes: at VCC = 6 V, the minimum setup time (ts) is 16 ns and minimum hold time (th) is 0 ns. This means DATA A–D must be stable at least 16 ns before LOAD goes LOW; no hold time is required after LOAD assertion, simplifying parallel load timing in FPGA- or MCU-driven systems.