CAT9554 Port Datasheet

CAT9554 Datasheet PDF, Equivalent


Part Number

CAT9554

Description

8-Bit I2C and SMBus I/O Port

Manufacture

Catalyst Semiconductor

Total Page 16 Pages
PDF Download
Download CAT9554 Datasheet PDF


CAT9554
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CAT9554, CAT9554A
8-bit I2C and SMBus I/O Port with Interrupt
FEATURES
I 400kHz I2C bus compatible*
I 2.3V to 5.5V operation
I Low stand-by current
I 5V tolerant I/Os
I 8 I/O pins that default to inputs at power-up
I High drive capability
I Individual I/O configuration
I Polarity inversion register
I Active low interrupt output
I Internal power-on reset
I No glitch on power-up
I Noise filter on SDA/SCL inputs
I Cascadable up to 8 devices
I Industrial temperature range
I RoHS-compliant 16-lead SOIC and TSSOP, and
16-pad TQFN (4 x 4 mm) packages
APPLICATIONS
I White goods (dishwashers, washing machines)
I Handheld devices (cell phones, PDAs, digital
cameras)
I Data Communications (routers, hubs and
servers)
DESCRIPTION
The CAT9554 and CAT9554A are CMOS devices that
provide 8-bit parallel input/output port expansion for I2C
and SMBus compatible applications. These I/O
expanders provide a simple solution in applications
where additional I/Os are needed: sensors, power
switches, LEDs, pushbuttons, and fans.
The CAT9554/9554A consist of an input port register, an
output port register, a configuration register, a polarity
inversion register and an I2C/SMBus-compatible serial
interface.
Any of the eight I/Os can be configured as an input or
output by writing to the configuration register. The system
master can invert the CAT9554/9554A input data by
writing to the active-high polarity inversion register.
The CAT9554/9554A features an active low interrupt
output which indicates to the system master that an input
state has changed.
The device’s extended addressing capability allows up
to 8 devices to share the same bus. The CAT9554A is
identical to the CAT9554 except the fixed part of the I2C
slave address is different. This allows up to 16 of devices
(eight CAT9554 and eight CAT9554A) to be connected
on the same bus.
For Ordering Information details, see page 15.
BLOCK DIAGRAM
A0
A1
A2
SCL
SDA
INPUT
FILTER
I2C/SMBUS
CONTROL
8-BIT
WRITE pulse
READ pulse
INPUT/
OUTPUT
PORTS
VCC
VSS
POWER-ON
RESET
NOTE: ALL I/Os ARE SET TO INPUTS AT RESET
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I2C Bus Protocol.
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
LP
FILTER
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7 VCC
INT
Doc. No. 25088, Rev. B

CAT9554
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CAT9554, CAT9554A
PIN CONFIGURATION
SOIC (W)
TSSOP (Y)
A0
A1
A2
I/O0
I/O1
I/O2
I/O3
VSS
1
2
3
4
5
6
7
8
16 VCC
15 SDA
14 SCL
13 INT
12 I/O7
11 I/O6
10 I/O5
9 I/O4
PIN DESCRIPTION
SOIC / TSSOP
1
2
3
4-7
8
9-12
13
14
15
16
TQFN
15
16
1
2-5
6
7-10
11
12
13
14
TQFN (HV4)
A1 A0 VCC SDA
A2 1
I/O0 2
I/O1 3
I/O2 4
12 SCL
11 INT
10 I/O7
9 I/O6
I/O3 VSS I/O4 I/O5
4 x 4 mm
Top View
PIN NAME
A0
A1
A2
I/O0-3
VSS
I/O4-7
INT
SCL
SDA
VCC
FUNCTION
Address Input 0
Address Input 1
Address Input 2
Input/Output Port 0 to Input/Output Port 3
Ground
Input/Output Port 4 to Input/Output Port 7
Interrupt Output (open drain)
Serial Clock
Serial Data
Power Supply
ABSOLUTE MAXIMUM RATINGS(1)
VCC with Respect to Ground ............... 0.5V to +6.5V
Voltage on Any Pin with
Respect to Ground ........................ 0.5V to +5.5V
DC Current on I/O0 to I/O7 ........................................... +50 mA
DC Input Current ............................................. +20 mA
VCC Supply Current ............................................ 85mA
VSS Supply Current .......................................... 100mA
Package Power Dissipation
Capability (TA = 25°C) ................................... 1.0W
Junction Temperature ..................................... +150°C
Storage Temperature ........................ -65°C to +150°C
RELIABILITY CHARACTERISTICS
Symbol
Parameter
Reference Test Method
Min Units
VZAP(2)
ESD Susceptibility
JEDEC Standard JESD 22
2000
Volts
ILTH(2)(3)
Latch-up
JEDEC Standard 17
100 mA
Notes:
(1) Stresses above those listed under Absolute Maximum Ratingsmay cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this
specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.
(2) This parameter is tested initially and after a design or process change that affects the parameter.
(3) Latch-up protection is provided for stresses up to 100 mA on address and data pins from -1V to VCC +1V.
Doc. No. 25088, Rev. B
2
© 2006 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice


Features www.DataSheet4U.com CAT9554, CAT9554A 8 -bit I2C and SMBus I/O Port with Interr upt FEATURES I 400kHz I2C bus compatibl e* I 2.3V to 5.5V operation I Low stand -by current I 5V tolerant I/Os I 8 I/O pins that default to inputs at power-up I High drive capability I Individual I /O configuration I Polarity inversion r egister I Active low interrupt output I Internal power-on reset I No glitch on power-up I Noise filter on SDA/SCL inp uts I Cascadable up to 8 devices I Indu strial temperature range I RoHS-complia nt 16-lead SOIC and TSSOP, and DESCRIP TION The CAT9554 and CAT9554A are CMOS devices that provide 8-bit parallel inp ut/output port expansion for I2C and SM Bus compatible applications. These I/O expanders provide a simple solution in applications where additional I/Os are needed: sensors, power switches, LEDs, pushbuttons, and fans. The CAT9554/9554 A consist of an input port register, an output port register, a configuration register, a polarity inversion register and an I2C/SMBus-compat.
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