PCA9555 Expander Datasheet

PCA9555 Datasheet, PDF, Equivalent


Part Number

PCA9555

Description

Remote 16-bit I2C and SMBus I/O Expander

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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PCA9555
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PCA9555
SCPS131I – AUGUST 2005 – REVISED APRIL 2019
PCA9555 Remote 16-bit I2C and SMBus I/O Expander with Interrupt Output and
Configuration Registers
1 Features
1 Low Standby-Current Consumption of 1 μA Max
• I2C to Parallel Port Expander
• Open-Drain Active-Low Interrupt Output
• 5-V Tolerant I/O Ports
• Compatible With Most Microcontrollers
• 400-kHz Fast I2C Bus
• Address by Three Hardware Address Pins for Use
of up to Eight Devices
• Polarity Inversion Register
• Latched Outputs With High-Current Drive
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 Applications
• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Personal Electronics
• Industrial Automation Equipment
• Products with GPIO-Limited Processors
3 Description
This 16-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 PCA9555 consists of two 8-bit Configuration
(input or output selection), Input Port, Output Port,
and Polarity Inversion (active high or active low
operation) registers. At power on, the I/Os are
configured as inputs. 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SSOP (24) DB
8.20 mm × 5.30 mm
SSOP (24) DBQ
8.65 mm × 3.90 mm
PCA9555
TVSOP (24) DGV
SOIC (24) DW
5.00 mm x 4.40 mm
15.4 mm x 7.50 mm
SSOP (24) PW
7.80 mm x 4.40 mm
VQFN (24) RGE
4.00 mm x 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Block Diagram
1
INT
Interrupt
Logic
PCA9555
LP Filter
A0
A1
A2
SCL
SDA
21
2
3
22
23
Input
Filter
I2C Bus
Control
Shift
Register
16 Bits
I/O
Port
P07−P00
P17−P10
VCC
GND
24
12
Power-On
Reset
1
Write Pulse
Read Pulse
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.

PCA9555
PCA9555
SCPS131I – AUGUST 2005 – REVISED APRIL 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Thermal Information .................................................. 5
6.6 Electrical Characteristics........................................... 6
6.7 I2C Interface Timing Requirements.......................... 6
6.8 Switching Characteristics .......................................... 7
6.9 Typical Characteristics .............................................. 8
7 Parameter Measurement Information ................ 11
8 Detailed Description ............................................ 13
8.1 Overview ................................................................. 13
8.2 Functional Block Diagram ....................................... 13
8.3 Device Features ...................................................... 14
8.4 Device Functional Modes........................................ 15
8.5 Programming........................................................... 16
9 Application and Implementation ........................ 23
9.1 Application Information............................................ 23
9.2 Typical Application ................................................. 23
10 Power Supply Recommendations ..................... 25
10.1 Power-On Reset Errata......................................... 25
11 Layout................................................................... 26
11.1 Layout Guidelines ................................................. 26
11.2 Layout Example .................................................... 26
12 Device and Documentation Support ................. 27
12.1 Receiving Notification of Documentation Updates 27
12.2 Community Resources.......................................... 27
12.3 Trademarks ........................................................... 27
12.4 Electrostatic Discharge Caution ............................ 27
12.5 Glossary ................................................................ 27
13 Mechanical, Packaging, and Orderable
Information ........................................................... 27
4 Revision History
Changes from Revision H (April 2019) to Revision I
Page
• Changed the I2C Interface Timing Requirements table.......................................................................................................... 6
Changes from Revision G (March 2018) to Revision H
Page
• Changed the Device Information table ................................................................................................................................... 1
• Added the DW package to the Thermal Information table ..................................................................................................... 5
Changes from Revision F (June 2014) to Revision G
Page
• Added the Applications list .................................................................................................................................................... 1
• Removed the Thermal Information from the Absolute Maximum Ratings.............................................................................. 4
• Added Storage temperature range to the Absolute Maximum Ratings.................................................................................. 4
• Changed the Handling Ratings table to the ESD Ratings table ............................................................................................. 4
• Added the Thermal Information table .................................................................................................................................... 5
• Changed From: "VCC must be lowered to below 0.2 V" To: VCC must be lowered to 0 V" in the Power-On Reset section. 14
• Added the Design Requirements section ............................................................................................................................ 24
• Added the Application Curves section ................................................................................................................................. 25
• Added the Layout section .................................................................................................................................................... 26
Changes from Revision E (May 2008) to Revision F
Page
• Added Interrupt Errata section.............................................................................................................................................. 15
• Added Power-On Reset Errata section. ............................................................................................................................... 25
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Product Folder Links: PCA9555
Copyright © 2005–2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity PCA9555 SCPS131I – AUGUST 200 5 – REVISED APRIL 2019 PCA9555 Remote 16-bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Reg isters 1 Features •1 Low Standby-Cur rent Consumption of 1 μA Max • I2C t o Parallel Port Expander • Open-Drain Active-Low Interrupt Output • 5-V To lerant I/O Ports • Compatible With Mo st Microcontrollers • 400-kHz Fast I2 C Bus • Address by Three Hardware Add ress Pins for Use of up to Eight Device s • Polarity Inversion Register • L atched Outputs With High-Current Drive Capability for Directly Driving LEDs Latch-Up Performance Exceeds 100 mA P er 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 Mode l (C101) 2 Applications • Servers • Routers (Telecom Switching Equipment) • Personal Computers • Personal Electronics • Industrial Automation Equipment • Products with GPIO-L.
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