onsemi MC74LCX07MEL

Overview

MC74LCX07MEL from onsemi is a low-voltage CMOS hex buffer with six independent open-drain outputs and 5 V-tolerant inputs, operating from 1.65 V to 5.5 V supply. It delivers 24 mA sink capability at 3.0 V, features near-zero static supply current (10 µA), and supports wired-OR/AND logic functions in industrial bus interface and level-shifting applications.

For engineers reviewing the MC74LCX07MEL datasheet, pinout, applications, or equivalent options, key selection considerations include open-drain output configuration, 5.5 V input tolerance, propagation delay ≤3.3 ns at 3.3 V, LVTTL/LVCMOS compatibility, and SOIC-14 package suitability for mixed-voltage system interfacing.

Technical Context

The MC74LCX07MEL implements six identical non-inverting buffer stages, each with high-impedance TTL-compatible inputs and open-drain NMOS outputs. Its VIH/VIL thresholds scale with VCC (e.g., VIH = 0.65×VCC at 1.65–1.95 V), enabling robust operation across 1.65–5.5 V supply ranges.

Input protection includes 5.5 V absolute maximum rating and ±50 mA DC output sink/source capability. The device supports tri-state behavior only via external pull-up configuration - no internal enable control - and requires all unused inputs tied to GND or VCC per datasheet guidance.

Key Specifications

Pinout & Package

MC74LCX07MEL is packaged in a 14-lead SOIC (Case 751A), with 1.27 mm pitch, 8.75 mm × 3.9 mm body, and Pb-free/Green compliance. Pin 1 is index-marked; pin 7 is GND; pin 14 is VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex open-drain buffer applications.

Compared with SN74LVC07APWR and 74AHC1G07SE-7, the MC74LCX07MEL uniquely combines 1.65 V minimum supply, 5.5 V input tolerance, and 10 µA max ICC in a single hex buffer - making it irreplaceable for ultra-low-power, mixed-voltage industrial control interfaces where both voltage flexibility and leakage sensitivity are design-critical.

Availability

MC74LCX07MEL is available at Aetrix Electronics and suitable for I²C level translation, GPIO interrupt aggregation, LED driver interface, and legacy system glue logic requiring stable component supply across automotive, industrial, and embedded computing programs.

Supply support for MC74LCX07MEL 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74LCX07MEL belongs to the LCX low-voltage CMOS logic family, designed specifically for mixed-supply-system interfacing with emphasis on voltage tolerance, low power, and noise immunity in harsh industrial environments.

FAQ

What is the maximum input voltage the MC74LCX07MEL can safely accept?

The MC74LCX07MEL supports DC input voltages from −0.5 V to +6.5 V, with a recommended operating range up to 5.5 V. This 5 V-tolerant input specification allows direct connection to 5 V logic sources even when powered from lower supplies like 1.8 V or 3.3 V, eliminating external level-shifting components in mixed-voltage designs.

Does the MC74LCX07MEL have built-in pull-up resistors on its outputs?

No, the MC74LCX07MEL does not include internal pull-up resistors. Its outputs are true open-drain NMOS structures that require external pull-up resistors to establish HIGH logic levels. The value of the pull-up resistor must be selected based on bus capacitance, required rise time, and sink current - typically 1 kΩ to 10 kΩ for I²C or general-purpose use.

Can the MC74LCX07MEL operate at 1.65 V supply while driving a 5 V pull-up?

Yes, the MC74LCX07MEL is fully specified to operate from 1.65 V to 5.5 V and supports 5 V-tolerant inputs and outputs. When powered at 1.65 V, its outputs remain compatible with 5 V pull-ups because the open-drain architecture isolates VCC from the output node - the HIGH level is defined solely by the external pull-up voltage, not VCC.

What is the propagation delay of the MC74LCX07MEL at 3.3 V supply?

At VCC = 3.0–3.6 V and TA = −40°C to +125°C, the MC74LCX07MEL exhibits a maximum propagation delay (tPLZ/tPZL) of 3.3 ns. This low latency supports high-speed signal routing in real-time control loops and fast peripheral handshaking, such as in SPI-based sensor interfaces or memory-mapped I/O expansion.

Is the MC74LCX07MEL RoHS compliant and lead-free?

Yes, the MC74LCX07MEL is RoHS compliant and Pb-free, as confirmed in the official onsemi datasheet (Rev. 16, July 2024). The "G" suffix in ordering codes (e.g., MC74LCX07DR2G) explicitly denotes Pb-free packaging, and the device meets halogen-free and BFR-free requirements per JEDEC J-STD-609.