Datasheet

www.ti.com
PCA9545A
4-CHANNEL I
2
C AND SMBus SWITCH
WITH INTERRUPT LOGIC AND RESET FUNCTIONS
SCPS147C – OCTOBER 2005 – REVISED OCTOBER 2006
TERMINAL FUNCTIONS
NO.
NAME DESCRIPTION
DGV, DW, PW, GQN AND
RGW
AND RGY ZQN
1 19 A2 A0 Address input 0. Connect directly to V
CC
or ground.
2 20 A1 A1 Address input 1. Connect directly to V
CC
or ground.
Active-low reset input. Connect to V
CC
through a pullup
3 1 B3 RESET
resistor, if not used.
Active-low interrupt input 0. Connect to V
CC
through a
4 2 B1 INT0
pullup resistor.
5 3 C2 SD0 Serial data 0. Connect to V
CC
through a pullup resistor.
6 4 C1 SC0 Serial clock 0. Connect to V
CC
through a pullup resistor.
Active-low interrupt input 1. Connect to V
CC
through a
7 5 D3 INT1
pullup resistor.
8 6 D1 SD1 Serial data 1. Connect to V
CC
through a pullup resistor.
9 7 E2 SC1 Serial clock 1. Connect to V
CC
through a pullup resistor.
10 8 E1 GND Ground
Active-low interrupt input 2. Connect to V
CC
through a
11 9 E3 INT2
pullup resistor.
12 10 E4 SD2 Serial data 2. Connect to V
CC
through a pullup resistor.
13 11 D2 SC2 Serial clock 2. Connect to V
CC
through a pullup resistor.
Active-low interrupt input 3. Connect to V
CC
through a
14 12 D4 INT3
pullup resistor.
15 13 C3 SD3 Serial data 3. Connect to V
CC
through a pullup resistor.
16 14 C4 SC3 Serial clock 3. Connect to V
CC
through a pullup resistor.
Active-low interrupt output. Connect to V
CC
through a pullup
17 15 B2 INT
resistor.
18 16 B4 SCL Serial clock line. Connect to V
CC
through a pullup resistor.
19 17 A4 SDA Serial data line. Connect to V
CC
through a pullup resistor.
20 18 A3 V
CC
Supply power
3
Submit Documentation Feedback