Part Number Description Max frequency (kHz) I2C Adress Vcc Range(V) Interrupt 5V-to lerant I/O Output type max I/O voltage tolerance Number of I/Os Standby Current Max Output device current Default POR Output State Hardware Reset input Configuration Registers I/O Pull-Up Cross Reference Pin/Package
































































AT9555 400 0100xxx 2.3~5.5 Totem-Pole 5.5V 16 0.25μA 10mA Hi-Z Input 100kΩ PCA9555 CAT9555 TSSOP24 QFN24
AT9554A 400 0111xxx 2.3~5.5 Totem-Pole 5.5V 8 0.25μA 10mA Hi-Z Input 100kΩ PCA9554A TSSOP16 QFN16 SOP16(W)
AT9554 400 0100xxx 2.3~5.5 Totem-Pole 5.5V 8 0.25μA 10mA Hi-Z Input 100kΩ PCA9554 CAT9554 TSSOP16 QFN16 SOP16(W)
AT9557 400 2.3~5.5 Open-Drain 5.5V 8 0.25μA 10mA Hi-Z Input PCA9557 TSSOP16 QFN16
AT1116 400 11101xx 2.3~5.5 Totem-Pole 5.5V 16 0.25μA 10mA Hi-Z Input TCA1116 TSSOP24 QFN24
AT8574 100 0100xxx 2.3~5.5 Quasi-Output 5.5V 8 2.5μA 25mA Hi-Z Input Weak PU PCF8574 SOP16L SOP16L(W)
AT8574A 100 0111xxx 2.3~5.5 Quasi-Output 5.5V 8 2.5μA 25mA Hi-Z Input Weak PU PCF8574A SOP16L
AT8575 400 0100xxx 2.3~5.5 Quasi-Output 5.5V 16 2.5μA 25mA Hi-Z Input Weak PU PCF8575 TSSOP24 QFN24
AT8575C 400 0100xxx 2.3~5.5 Quasi-Output 5.5V 16 2.5μA 25mA Hi-Z Input Weak PU PCF8575C TSSOP24 QFN24
AT9530 400 1100xxx 2.3~5.5 Open-Drain 5.5V 2 1.9μA 25mA Hi-Z Input PCA9530 SOP8 MSOP8
AT9531 400 1100xxx 2.3~5.5 Open-Drain 5.5V 8 1.9μA 25mA Hi-Z Input PCA9531 LP3944 TSSOP16 QFN16
AT9532 400 1100xxx 2.3~5.5 Open-Drain 5.5V 16 2.1μA 25mA Hi-Z Input PCA9532 LP3943 CAT9532 TSSOP24 QFN24
AT9533 400 1100010 1100011 2.3~5.5 Open-Drain 5.5V 4 1.9μA 25mA Hi-Z Input PCA9533 SOP8 MSOP8
AT9534 400 2.3~5.5 Open-Drain 5.5V 8 0.25μA 25mA PCA9534 SO16
AT9535 400 2.3~5.5 Open-Drain 5.5V 16 0.25μA 25mA PCA9535 SO24
AT9539 400 11101xx 2.3~5.5 Totem-Pole 5.5V 16 0.25μA 10mA Hi-Z Input PCA9539 TSSOP24 QFN24
AT9550 400 1100xxx 2.3~5.5 Open-Drain 5.5V 2 1.9μA 25mA Hi-Z Input PCA9550 SOP8 MSOP8
AT9551 400 1100xxx 2.3~5.5 Open-Drain 5.5V 8 1.9μA 25mA Hi-Z Input PCA9551 TSSOP16 QFN16
AT9552 400 1100xxx 2.3~5.5 Open-Drain 5.5V 16 2.1μA 25mA Hi-Z Input PCA9552 TSSOP24 QFN24
AT9553 400 1100010 1100011 2.3~5.5 Open-Drain 5.5V 4 1.9μA 25mA PCA9553 SOP8 MSOP8
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