Datasheet

1
FEATURES
4
5
GND
P3
3
P2 SCL
6
2
SDAP1
7
1
P0
V
CC
8
DGKPACKAGE
(TOP VIEW)
GND
P3
5
4
SCLP2
3 6
P1
2
SDA
7
V
CC
8
1
P0
B2B1
C2C1
D2D1
A2A1
YZP PACKAGE
(BOTTOMVIEW)
Seemechanicaldrawingsfordimensions.
4
5
GND
P3
3
P2 SCL
6
2
SDAP1
7
1
P0
V
CC
8
DPACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
PCA9536
www.ti.com ....................................................................................................................................................... SCPS125F – APRIL 2006 – REVISED AUGUST 2008
REMOTE 4-BIT I
2
C AND SMBus I/O EXPANDER WITH CONFIGURATION REGISTERS
2
• Available in the Texas Instruments NanoFree™ • No Glitch on Power Up
Package
• Power-Up With All Channels Configured as
• Low Standby Current Consumption of Inputs
1 µ A Max
• Noise Filter on SCL/SDA Inputs
• I
2
C to Parallel Port Expander
• Latched Outputs With High-Current Drive
• Operating Power-Supply Voltage Range of Maximum Capability for Directly Driving LEDs
2.3 V to 5.5 V
• Latch-Up Performance Exceeds 100 mA Per
• 5-V Tolerant I/O Ports JESD 78, Class II
• 400-kHz Fast I
2
C Bus • ESD Protection Exceeds JESD 22
• Input/Output Configuration Register – 2000-V Human-Body Model (A114-A)
• Polarity Inversion Register – 200-V Machine Model (A115-A)
• Internal Power-On Reset – 1000-V Charged-Device Model (C101)
This 4-bit I/O expander for the two-line bidirectional bus (I
2
C) is designed for 2.3-V to 5.5-V V
CC
operation. It
provides general-purpose remote I/O expansion for most microcontroller families via the I
2
C interface [serial clock
(SCL), serial data (SDA)].
The PCA9536 features 4-bit Configuration (input or output selection), Input Port, Output Port, and Polarity
Inversion (active high or active low) registers. At power on, the I/Os are configured as inputs with a weak pullup
to V
CC
. However, the system master can enable the I/Os as either inputs or outputs by writing to the I/O
configuration bits. If no signals are applied externally to the PCA9536, the voltage level is 1, or high, because of
the internal pullup resistors. The data for each input or output is stored in the corresponding Input Port or Output
Port register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All
registers can be read by the system master.
The system master can reset the PCA9536 in the event of a timeout or other improper operation by utilizing the
power-on reset feature, which puts the registers in their default state and initializes the I
2
C/SMBus state machine.
The device ' s outputs (latched) have high-current drive capability for directly driving LEDs. It has low current
consumption.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2 NanoFree is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006 – 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.