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74HC245D,652

74HC245D,652 Description

The 74HC245D,652 is an 8-bit bidirectional transceiver from Nexperia's 74HC series, designed for surface-mount applications. Operating within a 2V to 6V supply range, it features non-inverting data transmission and reception, making it ideal for voltage-level translation and bus interfacing. Packaged in a 20-pin SOIC (Small Outline Integrated Circuit) tube, this device is RoHS3 compliant and adheres to REACH environmental standards. Although marked as obsolete, it remains a reliable choice for legacy designs requiring robust signal buffering and bidirectional communication.

74HC245D,652 Features

• Bidirectional 8-bit transceiver with non-inverting logic for seamless data flow control.
• Wide voltage range (2V–6V), compatible with TTL and CMOS logic levels.
• High output current (7.8mA sink/source), enabling direct drive of LEDs or low-power loads.
• Low power consumption typical of HC-series CMOS technology.
• 20-pin SOIC package for compact PCB layouts in space-constrained designs.
• Moisture Sensitivity Level (MSL) 1, suitable for extended storage without dry packing.
• Robust ESD protection, enhancing reliability in noisy environments.

74HC245D,652 Applications

This transceiver excels in bidirectional data bus buffering, particularly in:

• Microcontroller/microprocessor systems for interfacing peripherals with mixed voltage levels.
• Industrial automation where noise immunity and signal integrity are critical.
• Communication modules (UART, SPI) requiring voltage translation between 3.3V and 5V devices.
• Legacy equipment maintenance, offering drop-in compatibility for obsolete designs.
• Embedded systems with multi-master buses (e.g., I²C) needing direction control.

Conclusion of 74HC245D,652

The 74HC245D,652 provides a cost-effective, high-performance solution for bidirectional data transfer, combining wide voltage compatibility, high drive capability, and compact packaging. While newer alternatives exist, its proven reliability in noise-prone environments and legacy system support ensures continued relevance. Engineers valuing simplicity, compliance (RoHS3), and low-power operation will find it a pragmatic choice for buffering and level-shifting tasks.

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