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PCF8575C Datasheet Preview

PCF8575C Datasheet

Remote 16-Bit I2C AND SMBus Low-Power I/O Expander

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PCF8575C
SCPS123F – MARCH 2005 – REVISED JANUARY 2015
PCF8575C Remote 16-Bit I2C AND SMBus Low-Power I/O Expander
with Interrupt Output
1 Features
1 I2C to Parallel-Port Expander
• Open-Drain Interrupt Output
• Low Standby-Current Consumption of
10 μA Maximum
• Compatible With Most Microcontrollers
• 400-kHz Fast I2C Bus
• Address by Three Hardware Address Pins for Use
of up to Eight Devices
• 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
– 200-V Machine Model
– 1000-V Charged-Device Model
2 Applications
• Telecom Shelters: Filter Units
• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Personal Electronics
• Industrial Automation
• Products with GPIO-Limited Processors
3 Description
This 16-bit I/O expander for the two-line bidirectional
bus (I2C) is designed for 4.5-V to 5.5-V VCC
operation.
The PCF8575C provides general-purpose remote I/O
expansion for most microcontroller families via the I2C
interface serial clock (SCL) and serial data (SDA).
The device features a 16-bit quasi-bidirectional
input/output (I/O) port (P07–P00, P17–P10), including
latched outputs with high-current drive capability for
directly driving LEDs. Each quasi-bidirectional I/O can
be used as an input or output without the use of a
data-direction control signal. At power on, the I/Os
are in 3-state mode. The strong pullup to VCC allows
fast-rising edges into heavily loaded outputs. This
device turns on when an output is written high and is
switched off by the negative edge of SCL. The I/Os
should be high before being used as inputs. After
power on, as all the I/Os are set to 3-state, all of them
can be used as inputs. Any change in setting of the
I/Os as either inputs or outputs can be done with the
write mode. If a high is applied externally to an I/O
that has been written earlier to low, a large current
(IOL) flows to GND.
Device Information(1)
PART NUMBER PACKAGE (PIN)
BODY SIZE
SSOP (24)
8.20 mm × 5.30 mm
QSOP (24)
8.65 mm × 3.90
PCF8575C
TVSOP (24)
SOIC (24)
5.00 mm × 4.50 mm
15.40 mm × 7.50 mm
TSSOP (24)
7.80 mm × 4.40 mm
QFN (24)
4.0 mm × 4.0 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
I2C or SMBus Master
(e.g. Processor)
SDA
SCL
INT
A0
A1
A2
GND
VCC
PCF8575C
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
Peripheral Devices
RESET, ENABLE,
or control inputs
INT or status
outputs
LEDs
Peripheral Devices
RESET, ENABLE,
or control inputs
INT or status
outputs
LEDs
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.




etcTI

PCF8575C Datasheet Preview

PCF8575C Datasheet

Remote 16-Bit I2C AND SMBus Low-Power I/O Expander

No Preview Available !

PCF8575C
SCPS123F – MARCH 2005 – REVISED JANUARY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration................................................... 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 .................................................. 4
6.5 Electrical Characteristics.......................................... 5
6.6 I2C Interface Timing Requirements.......................... 5
6.7 Switching Characteristics......................................... 6
6.8 Typical Characteristics .............................................. 6
7 Parameter Measurement Information .................. 8
8 Detailed Description ............................................ 11
8.1 Overview ................................................................. 11
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 13
8.4 Device Functional Modes........................................ 15
9 Application and Implementation ........................ 17
9.1 Application Information............................................ 17
9.2 Typical Application ................................................. 17
10 Power Supply Recommendations ..................... 20
10.1 Power-On Reset Requirements ........................... 20
11 Layout................................................................... 22
11.1 Layout Guidelines ................................................. 22
11.2 Layout Example .................................................... 23
12 Device and Documentation Support ................. 24
12.1 Trademarks ........................................................... 24
12.2 Electrostatic Discharge Caution ............................ 24
12.3 Glossary ................................................................ 24
13 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
Changes from Revision E (October 2007) to Revision F
Page
• Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table,
Typical Characteristics, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1
• Deleted Ordering Information table. ....................................................................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: PCF8575C
Copyright © 2005–2015, Texas Instruments Incorporated


Part Number PCF8575C
Description Remote 16-Bit I2C AND SMBus Low-Power I/O Expander
Maker etcTI
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