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  • PCF8575C Remote 16-Bit I2C AND SMBus Low-Power I/O Expander with Interrupt Output

    • SCPS123F March   2005  – January 2015 PCF8575C

      PRODUCTION DATA.  

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  • PCF8575C Remote 16-Bit I2C AND SMBus Low-Power I/O Expander with Interrupt Output
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
      1. 8.2.1 Simplified Block Diagram of Device
      2. 8.2.2 Simplified Schematic Diagram of Each P-Port Input/Output
    3. 8.3 Feature Description
      1. 8.3.1 I2C Interface
      2. 8.3.2 Interface Definition
      3. 8.3.3 Address Reference
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Minimizing ICC When I/Os Control LEDs
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power-On Reset Requirements
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DGV|24
    • MPDS533A
  • PW|24
    • MPDS363A
  • DBQ|24
    • MPDS211A
  • RGE|24
    • MPQF124G
  • DW|24
    • MPDS174A
  • DB|24
    • MPDS509
Thermal pad, mechanical data (Package|Pins)
  • RGE|24
    • QFND024AD
Orderable Information
  • scps123f_oa
  • scps123f_pm
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    • Expanded reading width
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DATA SHEET

PCF8575C Remote 16-Bit I2C AND SMBus Low-Power I/O Expander with Interrupt Output

1 Features

  • 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
PCF8575C SSOP (24) 8.20 mm × 5.30 mm
QSOP (24) 8.65 mm × 3.90
TVSOP (24) 5.00 mm × 4.50 mm
SOIC (24) 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.
key_graphic.gif

4 Revision History

Changes from E Revision (October 2007) to F Revision

  • 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.Go
  • Deleted Ordering Information table.Go

5 Pin Configuration

po_cps121.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME NO.
DB, DBQ, DGV,
DW, AND PW		 RGE
INT 1 22 I Interrupt output. Connect to VCC through a pullup resistor.
A1 2 23 I Address input 1. Connect directly to VCC or ground. Pullup resistors are not needed.
A2 3 24 I Address input 2. Connect directly to VCC or ground. Pullup resistors are not needed.
P00 4 1 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P01 5 2 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P02 6 3 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P03 7 4 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P04 8 5 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P05 9 6 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P06 10 7 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P07 11 8 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
GND 12 9 — Ground
P10 13 10 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P11 14 11 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P12 15 12 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P13 16 13 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P14 17 14 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P15 18 15 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P16 19 16 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
P17 20 17 I/O P-port input/output. Open-drain design structure. Connect to VCC through a pullup resistor.
A0 21 18 I Address input 0. Connect directly to VCC or ground. Pullup resistors are not needed.
SCL 22 19 I Serial clock line. Connect to VCC through a pullup resistor
SDA 23 20 I/O Serial data line. Connect to VCC through a pullup resistor.
VCC 24 21 — Supply voltage

 
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