STMicroelectronics M74HCT08RM13TR

Overview

M74HCT08RM13TR from STMicroelectronics is a high-speed CMOS quad 2-input AND gate in TSSOP-14 package, featuring 13 ns typical propagation delay at VCC = 4.5 V, ±4 mA symmetrical output drive, TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and 1 µA max quiescent ICC at 25°C. It interfaces HCMOS systems with TTL/NMOS logic in industrial control and digital signal routing.

For engineers reviewing the M74HCT08RM13TR datasheet, M74HCT08RM13TR pinout, M74HCT08RM13TR application, or M74HCT08RM13TR equivalent, key selection factors include guaranteed 4.5–5.5 V operation, -55°C to +125°C extended temperature range, balanced tPLH/tPHL delays, 38 pF power dissipation capacitance, and TSSOP-14 footprint compatibility with space-constrained PCB layouts.

Technical Context

The M74HCT08RM13TR implements four independent AND gates using silicon gate C2MOS technology with buffered outputs, delivering high noise immunity and stable switching across its full operating temperature range. Its input protection circuits guard against ESD and transient overvoltage, while symmetrical output impedance ensures matched rise/fall times.

Designed for direct interfacing between HCMOS and legacy TTL/NMOS systems, it meets VIH/VIL thresholds compatible with TTL logic families and maintains consistent DC output voltage levels (VOH ≥ 4.18 V, VOL ≤ 0.26 V at IO = ±4 mA) under load across -55°C to +125°C.

Key Specifications

Pinout & Package

TSSOP-14 (Thin Shrink Small Outline Package), 4.9 mm × 6.4 mm body, 0.65 mm pitch, 14-lead surface-mount package with exposed pad not present; RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input AND gate applications.

Compared with SN74HCT08PW and 74VHC08FT, the M74HCT08RM13TR provides superior TTL interface margin and extended temperature support (-55°C to +125°C), making it optimal for legacy-system upgrades and high-reliability industrial deployments where input threshold compatibility is non-negotiable.

Availability

M74HCT08RM13TR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical diagnostic equipment timing, and test & measurement signal conditioning requiring stable component supply across long product lifecycles.

Supply support for M74HCT08RM13TR 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 M74HCT08RM13TR belongs to ST's HCT logic family, engineered specifically for seamless 5 V TTL-to-CMOS interfacing in mission-critical industrial and automotive control systems.

FAQ

What is the maximum operating junction temperature for M74HCT08RM13TR?

The device is rated for operation up to +125°C ambient temperature, and its absolute maximum junction temperature is 150°C. Thermal derating begins at 65°C per the 500 mW → 300 mW linear derating curve (10 mW/°C), requiring appropriate PCB copper area and airflow in high-density layouts.

Does M74HCT08RM13TR support mixed-voltage operation (e.g., 3.3 V inputs with 5 V VCC)?

No - the input voltage range is specified as 0 to VCC. With VCC = 5 V, inputs must remain within 0–5 V. Applying 3.3 V logic signals is acceptable since they fall within the valid VIH (≥2.0 V) and VIL (≤0.8 V) thresholds, but externally applied voltages exceeding VCC are prohibited and may damage internal protection diodes.

Can M74HCT08RM13TR drive a 50 pF capacitive load at 10 MHz without signal degradation?

Yes - AC specifications are characterized at CL = 50 pF and input tr/tf = 6 ns. At 10 MHz (100 ns period), the 13 ns typical tPD and 22 ns max tPLH/tPHL leave >70 ns setup/hold margin, and the 4 mA output drive ensures adequate slew rate (dV/dt ≈ 80 V/µs) to charge/discharge 50 pF within specification limits.

Is there a lead-free and RoHS-compliant version of this part?

Yes - M74HCT08RM13TR is manufactured in full compliance with RoHS Directive 2011/65/EU and REACH regulations. The TSSOP-14 package uses matte tin (Sn) lead finish, and the device carries the "E" suffix in ST's internal marking to denote lead-free construction, verified per JEDEC J-STD-020 moisture sensitivity and JESD22-A112 solderability standards.