Datasheet
DB,DGV,DW,ORPWPACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A0
A1
A2
P0
P1
P2
P3
GND
V
CC
SDA
SCL
INT
P7
P6
P5
P4
RGVPACKAGE
(TOP VIEW)
16
6 8
2
10
P7
P5
4
3
1
75
12
11
9
131415
SDA
A0
A1
P6
INT
SCL
P3
GND
P4
A2
P0
P1
P2
RGTPACKAGE
(TOP VIEW)
16
6 8
2
10
P7
P5
4
3
1
75
12
11
9
131415
SDA
A0
A1
P6
INT
SCL
P3
GND
P4
A2
P0
P1
P2
V
CC
V
CC
PCA9534
www.ti.com
SCPS124F – SEPTEMBER 2006 – REVISED JUNE 2010
REMOTE 8-BIT I
2
C AND SMBus LOW-POWER I/O EXPANDER
WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
Check for Samples: PCA9534
1
FEATURES
• Low Standby Current Consumption of • Polarity Inversion Register
1 mA Max
• Internal Power-On Reset
• I
2
C to Parallel Port Expander
• Power-Up With All Channels Configured as
• Open-Drain Active-Low Interrupt Output Inputs
• Operating Power-Supply Voltage Range of • No Glitch on Power Up
2.3 V to 5.5 V
• Noise Filter on SCL/SDA Inputs
• 5-V Tolerant I/O Ports
• Latched Outputs With High-Current Drive
• 400-kHz Fast I
2
C Bus Maximum Capability for Directly Driving LEDs
• Three Hardware Address Pins Allow up to • Latch-Up Performance Exceeds 100 mA Per
Eight Devices on the I
2
C/SMBus JESD 78, Class II
• Allows Up to 16 Devices on the I
2
C/SMBus • ESD Protection Exceeds JESD 22
When Used in Conjunction with the PCA9534A
– 2000-V Human-Body Model (A114-A)
See Table 1 for I
2
C Expander offerings
– 200-V Machine Model (A115-A)
• Input/Output Configuration Register
– 1000-V Charged-Device Model (C101)
DESCRIPTION/ORDERING INFORMATION
This 8-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 PCA9534 consists of one 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity
Inversion (active high or active low) register. At power on, the I/Os are configured as inputs. However, the
system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for
each input or output is kept in the corresponding Input or Output 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 PCA9534 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 PCA9534 open-drain interrupt (INT) output is activated when any input state differs from its corresponding
input port register state and is used to indicate to the system master that an input state has changed.
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.
UNLESS OTHERWISE NOTED this document contains
Copyright © 2006–2010, Texas Instruments Incorporated
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.