STMicroelectronics M74HC04B1R

Overview

M74HC04B1R from STMicroelectronics is a high-speed CMOS hex inverter in DIP14 package, delivering tPD = 8 ns (typ.) at VCC = 6 V, ICC ≤ 1 μA (max.) at TA = 25 °C, and operating across 2 V to 6 V supply range. It provides six independent inverting buffers with symmetrical |IOH| = IOL = 4 mA (min.) at VCC = 4.5 V, used in digital logic level translation and signal conditioning in industrial control panels.

For engineers reviewing the M74HC04B1R datasheet, M74HC04B1R pinout, M74HC04B1R application, or M74HC04B1R equivalent, key selection criteria include its -55 °C to +125 °C temperature rating, DIP14 through-hole compatibility with legacy 74-series designs, noise immunity (VNIH/VNIL ≥ 28% VCC), and ESD robustness (CDM 1 kV, HBM 2 kV).

Technical Context

The M74HC04B1R implements six independent CMOS inverter gates using silicon gate C2MOS technology, with three-stage internal buffering to enhance noise immunity and output stability. Each input includes integrated protection circuits against static discharge and transient overvoltage.

It operates as a true TTL-compatible logic inverter with L→H and H→L transitions defined by VIH ≥ 3.15 V and VIL ≤ 1.35 V at VCC = 4.5 V, and guarantees balanced propagation delays (tPLH ≈ tPHL) across all six channels under CL = 50 pF loading.

Key Specifications

Pinout & Package

DIP14 (Dual In-line Package, 14-pin, 0.3" wide body, through-hole mounting) with 0.1" pin pitch and standard JEDEC outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter applications.

Compared with SN74HC04N and MC74HC04AD, the M74HC04B1R uniquely combines full industrial temperature range, higher HBM ESD rating, and ST's C2MOS process for lower static current-making it optimal for thermally demanding, manually assembled, or field-deployed equipment.

Availability

M74HC04B1R is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, test instrumentation, and legacy system upgrades requiring stable component supply across extended temperature ranges.

Supply support for M74HC04B1R 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The M74HC04B1R belongs to ST's high-speed CMOS logic family, engineered specifically for robust, low-power digital interfacing in harsh-environment applications where reliability across extreme temperatures and noise resilience are critical.

FAQ

What is the maximum capacitive load the M74HC04B1R can drive reliably?

The M74HC04B1R is characterized for CL = 50 pF in AC specifications, with tPLH/tPHL values specified under that condition. While it can drive higher capacitance, propagation delay increases linearly beyond 50 pF; for loads >100 pF, output transition time exceeds 25 ns at VCC = 6 V, and simultaneous switching of all six gates may require local decoupling to prevent ground bounce.

Can M74HC04B1R operate at 3.3 V supply voltage?

Yes - the device is fully specified from VCC = 2 V to 6 V. At 3.3 V, VIH = 2.31 V (min.), VIL = 0.99 V (max.), VOH = 3.15 V (min. at IO = –4 mA), and VOL = 0.33 V (max. at IO = 4 mA), meeting 3.3 V LVTTL and most 3.3 V CMOS interface requirements without level-shifting circuitry.

Is M74HC04B1R RoHS compliant and lead-free?

Yes - the M74HC04B1R uses ST's ECOPACK®-compliant DIP14 package, which is lead-free and RoHS 2011/65/EU compliant. The device carries the "ECOPACK2" marking per ST's environmental program, with no exemptions applied; Pb-free soldering profiles up to 260 °C peak are supported.

Does M74HC04B1R support hot-swap or live-insertion?

No - the device lacks bus-hold or powered-off protection circuitry. Applying input signals while VCC is unpowered or ramping may forward-bias internal protection diodes, causing excessive current flow. Always ensure VCC is stable before applying logic signals, especially in backplane or modular systems where sequencing cannot be guaranteed.