PCA9515ADP/G-T

Signal Buffers, Repeaters, Splitters Overview

The PCA9515ADP/G-T is a CMOS integrated circuit designed for I2C-bus and SMBus systems. It functions as a dual-channel, bidirectional buffer that extends bus length and device count by buffering SDA and SCL lines, supporting up to two buses of 400 pF capacitance. The device operates with a supply voltage range of 2.3 V to 3.6 V and features 5.5 V tolerant I/O pins. It accommodates Standard-mode (100 kHz) and Fast-mode (400 kHz) devices, supports arbitration and clock stretching, and includes an active HIGH enable input. The component is housed in an 8-lead TSSOP package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Dual-channel bidirectional buffering for I2C and SMBus extension
• Lock-up free operation with open-drain inputs/outputs
• Supports mixed-voltage buses and multiple masters
• Active HIGH repeater enable input with internal pull-up

Signal Buffers, Repeaters, Splitters Applications

• Extending I2C bus length beyond standard capacitance limits
• Isolating high-speed (400 kHz) buses from low-speed (100 kHz) segments
• Connecting 3.3 V master devices to 5 V slave peripherals
• System management bus (SMBus) signal buffering

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product data sheet to confirm package type and tape/reel specifications. Ensure the revision level matches the design requirements, as NXP may update documentation without changing the base part number. Cross-reference the pinout diagram with the target PCB footprint to prevent assembly errors during integration.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires extending I2C bus capacitance beyond 400 pF or isolating distinct bus segments. It is suitable for applications involving mixed operating voltages between 2.3 V and 5.5 V. Designers must ensure external pull-up resistors are provided on both sides of the repeater, as the device does not integrate them internally. Avoid cascading multiple PCA9515A units in series.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9515A belongs to NXP Semiconductors' family of I2C-bus repeaters and buffers. This series includes variants such as the PCA9515D and PCA9515T, which share similar core functionality but differ in package styles like SO8 or HWSON8. The ADP suffix specifically denotes the TSSOP8 plastic thin shrink small outline package variant within this product line.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Direct substitutes include other PCA9515A variants with different packages, such as PCA9515AD (SO8) or PCA9515ATP (HWSON8). Verify pin compatibility and electrical characteristics before substitution. Other manufacturers offer functionally similar I2C repeaters, but pinouts and voltage tolerances must be validated against the datasheet.