The PCA9509 is a bidirectional level translating I2C-bus/SMBus repeater supporting voltage levels from 1.35 V to 5.5 V. It provides bidirectional buffering for SDA and SCL lines, extending the I2C bus capacitance up to 400 pF and enabling multiple master operations. The device features internal pull-up sources on port A, overvoltage-tolerant ports B, lock-up free operation, and the ability to interface with standard and fast-mode I2C devices. It is ideal for low-voltage systems requiring reliable bus translation and extension, with optional system control via an enable pin.
Voltage level translation from port A (1.35 V to Vcc) — 1.0 V to 5.5 V
Supports bidirectional buffering for SDA and SCL lines
Capacitance handling up to 400 pF on port B
Overvoltage-tolerant port B (up to 5.5 V)
Internal pull-up current source on port A
Lock-up free operation with internal current sensing
Operation voltage Vccia > 0.8 V, Vccp > 2.5 V
Clock frequency: 0 Hz to 400 kHz (system dependent)
Package options: SO8, TSSOP8, XQFN8
ESD protection: >2000 V HBM, >1000 V CDM
Power supply: 1.35 V to Vcc — 1.0 V on port A, 3.0 V to 5.5 V on port B
Temperature range: –40°C to +85°C
Device features active HIGH enable, high-impedance when unpowered
Buy the Buy NXP PCA9509GM125 Level Translating I2C Bus Repeater Online
Purchase the NXP PCA9509GM125 online to ensure reliable voltage level translation for your I2C and SMBus systems. This high-quality bus repeater supports voltage levels from 1.35 V to 5.5 V, providing bidirectional buffering and capacitive extension up to 400 pF. It features internal pull-up sources on port A, overvoltage-tolerant port B, lock-up free operation, and a system control enable pin. Ideal for low-voltage applications and multiple master configurations, it guarantees robust and safe communication between different voltage domains in your electronic system.
Get NXP PCA9509GM125 today—designed for reliable bus translation with bidirectional buffering and overvoltage tolerance.
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