CAT1023 CATALYST [Catalyst Semiconductor], CAT1023 Datasheet - Page 14

• Manufacturer Part Number: CAT1023
• Description: Catalyst Semiconductor
• Manufacturer: CATALYST [Catalyst Semiconductor]

12
i
2
c a n d s m b u s i / o p o r t e x p a n d e r s
CAT9554 / CAT9554A —
CAT9555 —
Features
Features
CAT9534 / CAT9535
8-bit / 16-bit I
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low stand-by current
0 to 400 kHz clock frequency
2.3 V to 5.5 V operation
5 V tolerant I/Os
2.3V to 5.5V operation
-40°C to +85°C operation
400kHz I
5V tolerant I/Os
2
C bus compatible
16-bit I
V CC
2
V SS
SDA
SCL
C and SMBus Low Power I/O Port expander with Interrupt
A0
A1
A2
V DD
2
C and SMBus I/O Port Expander with Interrupt
NOTE: ALL I/Os ARE SET TO INPUTS AT RESET
GND
8-bit I
V DD
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drive LEDs by sinking 25mA current
active low interrupt output
cascadable up to 8 devices-16
high drive capability
devices (CAT9555)
SDA
SCL
INT
2
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FILTER
C and SMBus I/O Port Expander with Interrupt
INPUT
active low interrupt output
internal power-on reset
noise filter on SCL/SDA inputs
POWER-ON
RESET
SCL
SDA
INT
A2
A1
A0
CAT9535
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V
I 2 C/SMBUS
CONTROL
DD
individual I/O configuration
internal power-on reset
noise filter on SDA/SCL inputs
V SS
Package Information
I/O 0. 0
I/O 0. 1
I/O 0. 2
I/O 0. 3
I/O 0. 4
I/O 0. 5
I/O 0. 6
I/O 0. 7
I/O 1. 0
I/O 1. 1
I/O 1. 3
I/O 1. 4
I/O 1. 5
I/O 1. 6
I/O 1. 7
I/O 1. 2
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16-pin SOIC & 16-pin TSSOP (CAT9534),24-pin SOIC (CAT9535)
16-pad TQFN (4 x 4 mm) (CAT9534),24-pin TQFN (4x4mm) (CAT9535)
pin compatible with PCA9534
WRITE pulse
READ pulse
ALARM
2 k
SUBSYSTEM 3
8-BIT
NUMERIC
KEYPAD
Timer
INT
SUBSYSTEM 1
OUTPUT
INPUT/
PORTS
Package Information
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Controlled Switch
16-pin SOIC (CAT9554),24-pin SOIC (CAT9555)
16-pin TSSOP (CAT9554),24-pin TSSOP (CAT9555)
16-pad TQFN (4 x 4 mm) (CAT9554),24-pin TQFN
pin compatible with PCA9554/9554A and PCA9555
(4x4mm) (CAT9555)
ENABLE
FILTER
LP
SUBSYSTEM 2
RESET
A
B
V DD
V CC
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
Applications
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RAID systems
servers
test equipment
fan control
TM