PCA9516APW,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9516APW,118 is a CMOS integrated circuit designed for I2C-bus and SMBus systems. It functions as a five-channel bidirectional hub repeater that buffers both data (SDAn) and clock (SCLn) lines to extend bus capacitance limits. The device supports Standard-mode and Fast-mode operations with a maximum clock frequency of 400 kHz. It operates within a supply voltage range of 2.3 V to 3.6 V and features 5.5 V tolerant inputs. Key electrical parameters include a propagation delay of up to 150 ns at 2.7 V and 120 ns at 3.6 V, a typical operating current of 4.7 mA, and a total power dissipation of 300 mW. The component is housed in a TSSOP16 package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Five-channel bidirectional buffering capability for expanding I2C-bus topology
• Lock-up free operation utilizing specific low voltage level offsets between input and output stages
• Supports arbitration and clock stretching across the repeater without functional degradation
• Powered-off high-impedance state prevents interference when the device is not active

Signal Buffers, Repeaters, Splitters Applications

• Extending I2C-bus segments beyond standard 400 pF capacitance limits
• Interfacing buses operating at different voltage levels, such as 3.3 V and 5 V
• Isolating slow-speed (100 kHz) buses from fast-speed (400 kHz) network segments

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering suffix ,118 corresponds to the TSSOP16 package variant. Confirm the temperature range covers -40 °C to +85 °C for industrial applications. Ensure the datasheet revision matches the required specifications for signal integrity and timing constraints.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires dividing an I2C bus into multiple segments while maintaining a single repeater delay per transition. It is suitable for designs needing voltage translation between 3.3 V and 5 V domains without external logic. Note that series connection of multiple PCA9516A units is prohibited by design.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9516APW,118 belongs to the PCA951xA family of I2C hubs manufactured by NXP Semiconductors. It serves as a signal buffer and repeater specifically engineered to overcome the capacitance limitations inherent in standard I2C protocols. The 'PW' designation indicates the Thin Shrink Small Outline Package (TSSOP16), distinguishing it from the SO16 variant.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers: PCA9516AD,118.