MC74AC125MELG

Overview

The MC74AC125MELG is a quad 3-state buffer manufactured by onsemi, utilizing high-performance silicon-gate CMOS technology. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an ambient operating temperature from -40°C to +85°C. The device features low enable inputs and outputs capable of sourcing or sinking up to 24 mA. Propagation delays are specified at 9 ns maximum at 3.3 V and 7 ns maximum at 5.0 V with a 50 pF load. Quiescent supply current is typically 8 µA at 5.5 V.

Feature Summary

• Quad 3-state buffering with low active-low enable inputs
• High-current output drivers supporting 24 mA source/sink capability
• Low quiescent power consumption typical of 8 µA

Applications

• Mobile applications requiring low power operation
• Consumer products utilizing battery-powered systems
• Computing equipment and peripherals
• Telecommunications infrastructure

Procurement Notes

Verify the specific MELG suffix against official ordering information to confirm package type and shipping configuration. Ensure compatibility with RoHS directives and lead-free manufacturing standards required for the target assembly process. Confirm moisture sensitivity level classifications prior to storage and handling.

Selection Notes

Select this component when designing circuits that require multiple buffered signals with independent control over output states. The AC logic family provides faster switching speeds compared to standard HC series devices while maintaining compatible pinouts. Evaluate thermal resistance values if operating near maximum junction temperature limits.

Part Context

This part belongs to the MC74AC125 family of logic buffers. It shares functional characteristics with other members like the MC74AC125DG but differs in packaging style. The MELG designation indicates a specific surface-mount package variant intended for automated assembly processes in modern electronics manufacturing.

Replacement Considerations

MC74AC125DG

FAQ

What is the function of the enable input?

The enable input controls the state of the outputs. When the enable input is low, the buffer functions normally. When high, the outputs enter a high-impedance state.

Does this device have TTL-compatible inputs?

No, the MC74AC125 does not have TTL-compatible inputs. Only the MC74ACT125 variant features TTL-compatible input thresholds.