I/O Expander. PCA9554 Datasheet

PCA9554 Expander. Datasheet pdf. Equivalent

Part PCA9554
Description Remote 8-Bit I2C AND SMBus I/O Expander
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PCA9554
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PCA9554
SCPS128C – JULY 2006 – REVISED JUNE 2014
PCA9554 Remote 8-Bit I2C AND SMBus I/O Expander With Interrupt Output and
Configuration Registers
1 Features
1 I2C to Parallel Port Expander
• Open-Drain Active-Low Interrupt Output
• Operating Power-Supply Voltage Range of 2.3 V
to 5.5 V
• 5-V Tolerant I/Os
• 400-kHz Fast I2C Bus
• Three Hardware Address Pins Allow up to Eight
Devices on the I2C/SMBus
• Input/Output Configuration Register
• Polarity Inversion Register
• Internal Power-On Reset
• Power-Up With All Channels Configured as Inputs
• No Glitch On Power Up
• Latched Outputs With High-Current Drive
Maximum Capability for Directly Driving LEDs
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
2 Description
This 8-bit I/O expander for the two-line bidirectional
bus (I2C) is designed for 2.3-V to 5.5-V VCC
operation. It provides general-purpose remote I/O
expansion for most microcontroller families via the I2C
interface [serial clock (SCL), serial data (SDA)].
The PCA9554 consists of one 8-bit Configuration
(input or output selection), Input, Output, and Polarity
Inversion (active high or active low) registers. At
power on, the I/Os are configured as inputs with a
weak pullup to VCC. 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 PCA9554 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
I2C/SMBus state machine.
The PCA9554 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SSOP (16)
6.20 mm × 5.30 mm
PCA9554
VQFN (16)
4.00 mm × 4.00 mm
QFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
DB, DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
RGV PACKAGE
(TOP VIEW)
RGT PACKAGE
(TOP VIEW)
A0
A1
A2
P0
P1
P2
P3
GND
1
2
3
4
5
6
7
8
16 VCC
15 SDA
14 SCL
13 INT
12 P7
11 P6
10 P5
9 P4
16 15 14 13
A2 1
12 SCL
P0 2
11 INT
P1 3
10 P7
P2 4
9 P6
567 8
16 15 14 13
A2 1
12 SCL
P0 2
11 INT
P1 3
10 P7
P2 4
9 P6
567 8
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



PCA9554
PCA9554
SCPS128C – JULY 2006 – REVISED JUNE 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Description ............................................................. 1
3 Revision History..................................................... 2
4 Description (Continued) ........................................ 3
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 Handling Ratings....................................................... 4
6.3 Recommended Operating Conditions....................... 4
6.4 Electrical Characteristics........................................... 5
6.5 I2C Interface Timing Requirements........................... 6
6.6 Switching Characteristics .......................................... 6
6.7 Typical Characteristics .............................................. 7
7 Parameter Measurement Information ................ 10
8 Detailed Description ............................................ 13
8.1 Functional Block Diagram ....................................... 13
8.2 Device Functional Modes........................................ 14
8.3 Programming........................................................... 15
9 Application And Implementation........................ 21
9.1 Typical Application ................................................. 21
10 Power Supply Recommendations ..................... 23
10.1 Power-On Reset Errata......................................... 23
11 Device and Documentation Support ................. 24
11.1 Trademarks ........................................................... 24
11.2 Electrostatic Discharge Caution ............................ 24
11.3 Glossary ................................................................ 24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 24
3 Revision History
Changes from Revision B (August 2008) to Revision C
Page
• Added Interrupt Errata section.............................................................................................................................................. 15
• Added Power-On Reset Errata section. ............................................................................................................................... 23
2 Submit Documentation Feedback
Product Folder Links: PCA9554
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