STMicroelectronics M74HC133B1R

Overview

M74HC133B1R from STMicroelectronics is a high-speed CMOS 13-input NAND gate in a 16-pin plastic DIP package, featuring tPD = 14 ns (typ.) at VCC = 6 V, symmetrical output drive (|IOH| = IOL = 4 mA min), and wide supply range (2–6 V). It serves as a single-stage multi-input logic combiner in address decoding, bus arbitration, and enable control circuits for industrial microcontroller peripherals.

For engineers reviewing the M74HC133B1R datasheet, M74HC133B1R pinout, M74HC133B1R application, or M74HC133B1R equivalent, key selection criteria include input count (13), propagation delay symmetry (tPLH ≅ tPHL), noise immunity (VNIH/VNIL ≥ 28% VCC), and compatibility with legacy 74-series logic families.

Technical Context

The M74HC133 implements a single 13-input NAND function using silicon gate C2MOS technology, with seven internal logic stages including buffered output to enhance noise rejection and output stability. All inputs integrate ESD and transient voltage protection circuits, enabling robust operation in noisy industrial environments.

It operates across -55°C to +125°C with rail-to-rail input/output voltage tolerance (VI, VO = 0 to VCC) and supports fast edge rates (tr/tf ≤ 400 ns at VCC = 6 V), making it suitable for synchronous logic interfacing where fan-in depth exceeds standard 2–8 input gates.

Key Specifications

Pinout & Package

Package: Plastic DIP-16 (0.300" width), JEDEC MS-001, body dimensions 20.0 × 8.5 × 3.3 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-input NAND logic applications.

Compared with SN74HC133N and 74VHC133N, M74HC133B1R offers the widest supply range (2–6 V), highest noise immunity (28% VCC), and guaranteed operation to +125°C-making it optimal for thermally demanding, multi-voltage industrial designs where reliability outweighs marginal speed gains.

Availability

M74HC133B1R is available at Aetrix Electronics and suitable for memory decoding, bus arbitration, industrial I/O enable, and legacy system interface applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for M74HC133B1R 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, designing and manufacturing analog, MCU, power, and logic devices for industrial, automotive, and consumer markets.

The M74HC133 belongs to the high-speed CMOS logic family optimized for low-power, noise-immune digital interfacing in harsh-environment control systems and retro-compatibility with 74-series architectures.

FAQ

What is the maximum operating frequency supported by M74HC133B1R?

The M74HC133B1R does not specify a maximum clock frequency in its datasheet because it is a combinational logic device-not a sequential element. Its usable toggle rate is determined by propagation delay: at VCC = 6 V, tPD = 14 ns (typ.), supporting reliable operation up to ~35 MHz in feedback-free gating applications. For clocked systems, ensure setup/hold margins exceed tPLH/tPHL plus trace delays.

Can M74HC133B1R drive LED indicators directly?

No. While the output can sink/source up to 4 mA, driving even low-current LEDs (typically requiring ≥2 mA at 1.8–2.2 V forward voltage) would violate VOL/VOH specifications under load. The output voltage swing collapses below logic thresholds when loaded beyond 20 µA in high/low states per datasheet test conditions. Use a discrete transistor or dedicated LED driver for indicator applications.

Is M74HC133B1R compatible with 3.3 V microcontroller GPIOs?

Yes. With VIH(min) = 1.5 V at VCC = 2 V and 3.15 V at VCC = 4.5 V, the M74HC133B1R accepts 3.3 V logic-high signals reliably when powered at 3.3 V or 5 V. Its input threshold scales with VCC, ensuring clean recognition of 3.3 V outputs without level shifters-provided VCC is set to match the host system's supply or is ≥3.3 V.

Does M74HC133B1R require external pull-up or pull-down resistors on unused inputs?

Yes. Unused inputs must be tied HIGH or LOW-floating CMOS inputs cause increased ICC, erratic output behavior, and potential latch-up. The datasheet explicitly warns against leaving inputs unconnected. For 13-input NAND, tying unused pins to VCC (for logic HIGH) or GND (for logic LOW) ensures predictable Y output and prevents shoot-through current in the input stage.