onsemi

MC74HC125ADTR2

MC74HC125ADTR2 Description

The MC74HC125ADTR2 from onsemi is a high-performance quad buffer/line driver with 3-state outputs, designed for surface-mount applications. Part of the 74HC series, this IC features non-inverting logic and operates within a 2V to 6V supply range, making it versatile for mixed-voltage environments. Packaged in a 14-TSSOP tape-and-reel (TR) format, it is optimized for automated assembly processes. With 4 independent buffers, each capable of delivering 7.8mA output current (both high and low), this device ensures robust signal integrity in digital systems. Although marked as Obsolete, it remains a reliable choice for legacy designs due to its REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating.

MC74HC125ADTR2 Features

• Quad Non-Inverting Buffers: Four independent 1-bit buffers with 3-state outputs for bus-oriented applications.
• Wide Voltage Range (2V–6V): Compatible with TTL and CMOS logic levels, enabling flexible system integration.
• High Output Drive (7.8mA): Ensures strong signal transmission even under moderate loads.
• Surface-Mount TSSOP-14 Package: Compact footprint ideal for space-constrained PCB designs.
• 3-State Outputs: Allows multiple devices to share a common bus without contention.
• Low Power Consumption: HC-series CMOS technology minimizes static power dissipation.
• Automotive-Grade Reliability: Suitable for industrial and automotive applications (though obsolete, legacy stock may still meet stringent requirements).

MC74HC125ADTR2 Applications

• Bus Interface Circuits: Isolates and drives signals in shared-bus architectures (e.g., I²C, SPI).
• Data Communication Systems: Buffers data lines in UART/RS-232 interfaces to prevent signal degradation.
• Industrial Control Logic: Interfaces between low-power microcontrollers and higher-current peripherals.
• Legacy System Maintenance: Replaces older 74LS125 equivalents in upgrades due to superior HC-series performance.
• Test Equipment: Provides signal conditioning in prototyping and debugging setups.

Conclusion of MC74HC125ADTR2

The MC74HC125ADTR2 excels in applications demanding signal isolation, level shifting, or bus driving with minimal power overhead. Its high noise immunity and output current capability make it a pragmatic choice for legacy designs, despite its obsolete status. Engineers valuing onsemi’s proven HC-series quality and TSSOP packaging efficiency will find this IC a cost-effective solution for buffering and line-driving tasks in industrial, automotive, and communication systems. For new designs, consider verifying alternative active parts while leveraging existing stock for maintenance or phased upgrades.