CAT9555WI-T1

CAT9555 2 16-bit I C and SMBus I/O Port with Interrupt Description The CAT9555 is a CMOS device that provides 16bit parallel 2 input/output port expansion for I C and SMBus compatible CAT9555 INT V 1 CC A1 SDA 1 I/O A0 A2 SCL 0.0 I/O I/O I/O A0 0.1 1.7 0.0 I/O I/O I/O I/O 0.2 1.6 0.1 1.7 I/O I/O I/O I/O 0.2 0.3 1.5 1.6 I/O I/O I/O I/O 0.3 1.5 0.4 1.4 I/O I/O I/O I/O 0.4 1.4 0.5 1.3 I/O I/O 0.5 1.3 I/O I/O 0.6 1.2 I/O I/O 0.7 1.1 V I/O SS 1.0 SOIC (W), TSSOP (Y) TQFN (HV6, HT6) (Top View) (Top View) Figure 1. Pin Configurations A0 I/O 1.0 8 BIT I/O A1 1.1 I/O 1.2 A2 INPUT/ I/O 1.3 OUTPUT I/O 1.4 WRITE pulse PORTS I/O 1.5 READ pulse I/O 1.6 I/O 2 1.7 I C/SMBUS CONTROL I/O 0.0 SCL I/O 8 BIT INPUT 0.1 FILTER I/O SDA 0.2 INPUT/ I/O 0.3 OUTPUT I/O WRITE pulse PORTS 0.4 I/O V 0.5 INT READ pulse I/O POWERON 0.6 V CC RESET I/O 0.7 V SS LP FILTER INT Note: All I/Os are set to inputs at RESET. Figure 2. Block Diagram