PCA9557PWR

Product Summary

The PCA9557PWR is a silicon CMOS circuit which provides parallelinput/output expansion for SMBus and I2C applications. The PCA9557PWR consists of an 8-bit input port register, 8-bit output portregister, and an I2C/SMBus interface. It has low currentconsumption and a high impedance open drain output pin, I/O0. The system master can enable the PCA9557PWR’s I/O as either input or output by writing to the configuration register.

Parametrics

PCA9557PWR absolute maximum ratings: (1)DC supply voltage, VDD: -0.5 to 6.0V; (2)DC input voltage, Vi: VSS-0.5 to 5.5V; (3)DC input current, Ii: ±25MA; (4)Maximum allowed input current through protection; (5)diode, IIHL(max): ±400μA; (6)DC voltage on an I/O as an input other than I/O0, VI/O: VSS-0.5 to 5.5V; (7)DC voltage on I/O0 as an input, II/OI/O0: VSS-0.5V; (8)DC input current, II/OI/O0: -20mA ; (9)DC output current on an I/O, IDD: 85mA ; (10)DC supply current, ISS: 100mA ; (11)Total power dissipation, Ptot: 200mW ; (12)Storage temperature range, Tstg: -65 to +150℃ ; (13)Operating ambient temperature, Tamb: -40 to +85℃.

Features

PCA9557PWR features: (1)Lower voltage, higher performance migration path for the PCA9556; (2)8 general purpose input/output expander/collector; (3)Input/output configuration register; (4)Active HIGH polarity inversion register; (5)I2C and SMBus interface logic; (6)Internal power-on reset; (7)Noise filter on SCL/SDA inputs; (8)Active LOW reset input; (9)3 address pins allowing up to 8 devices on the I2C/SMBus; (10)High impedance open drain on I/O0; (11)No glitch on power-up; (12)Power-up with all channels configured as inputs; (13)Low standby current; (14)Operating power supply voltage range of 2.3 V to 5.5 V; (15)5 V tolerant inputs/outputs; (16)0 to 400 kHz clock frequency; (17)ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101; (18)Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA.

Diagrams