INTEGRATED CIRCUITS DATA SHEET PCF8575 Remote 16-bit I/O expander for I2C-bus Product specification Supersedes data of 1999 Feb 25 File under Integrated Circuits, IC12 1999 Apr 07
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus CONTENTS 1 FEATURES 2 GENERAL DESCRIPTION 3 ORDERING INFORMATION 4 BLOCK DIAGRAM 5 PINNING 6 CHARACTERISTICS OF THE I2C-BUS 6.1 6.2 6.3 6.4 Bit transfer START and STOP conditions System configuration Acknowledge 7 FUNCTIONAL DESCRIPTION 7.1 7.2 7.3 7.4 7.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus 1 PCF8575 FEATURES • Operating supply voltage 2.5 to 5.5 V • Low standby current consumption of 10 µA maximum • I2C-bus to parallel port expander • 400 kbits/s FAST I2C-bus • Open-drain interrupt output The device consists of a 16-bit quasi-bidirectional port and an I2C-bus interface. The PCF8575 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus 4 PCF8575 BLOCK DIAGRAM handbook, full pagewidth INT A0 A1 A2 SCL SDA 1 INTERRUPT LOGIC LP FILTER PCF8575 21 2 3 22 23 INPUT FILTER I2C-BUS CONTROL P00 to P07 4 to 11 SHIFT REGISTER 16 BITS I/O PORT P10 to P17 13 to 20 WRITE pulse VDD VSS 24 12 READ pulse POWER-ON RESET MGL537 Fig.1 Block diagram.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus 5 PCF8575 PINNING SYMBOL PIN DESCRIPTION INT 1 interrupt output (active LOW) A1 2 address input 1 A2 3 address input 2 P00 4 quasi-bidirectional I/O 00 P01 5 quasi-bidirectional I/O 01 P02 6 P03 handbook, halfpage INT 1 24 VDD quasi-bidirectional I/O 02 A1 2 23 SDA 7 quasi-bidirectional I/O 03 A2 3 22 SCL P04 8 quasi-bidirectional I/O 04 P00 4 21 A0 P05 9 quasi-bidirectional I/O 05
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus 6 CHARACTERISTICS OF THE I2C-BUS 6.4 The I2C-bus is for bidirectional, 2-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor when connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy. 6.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus PCF8575 handbook, full pagewidth SDA SDA SCL SCL S P START condition STOP condition MBC622 Fig.4 Definition of START and STOP conditions. SDA SCL MASTER TRANSMITTER / RECEIVER SLAVE TRANSMITTER / RECEIVER SLAVE RECEIVER MASTER TRANSMITTER MASTER TRANSMITTER / RECEIVER MBA605 Fig.5 System configuration.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus 7 7.1 PCF8575 FUNCTIONAL DESCRIPTION Quasi-bidirectional I/Os The PCF8575’s 16 ports (see Fig.7) are entirely independent and can be used either as input or output ports. Input data is transferred from the ports to the microcontroller in the READ mode (see Fig.10). Output data is transmitted to the ports in the WRITE mode (see Fig.9).
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Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus 7.3 Reading from a port (input mode) 7.5 All ports programmed as input should be set to logic 1. To read, the master (microcontroller) first addresses the slave device after it receives the interrupt. By setting the last bit of the byte containing the slave address to logic 1 the read mode is entered. The data bytes that follow on the SDA are the values on the ports.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus handbook, full pagewidth VDD MICROCOMPUTER PCF8575 PCF8575 (1) PCF8575 (2) PCF8575 (8) INT INT INT INT MGL544 Fig.12 Application of multiple PCF8575s with interrupt.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus PCF8575 8 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134); note 1. SYMBOL PARAMETER MIN. MAX. UNIT VDD supply voltage −0.5 +6.5 V IDD supply current − ±100 mA ISS supply current − ±100 mA VI input voltage VSS − 0.5 VDD + 0.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus SYMBOL IL2 PARAMETER leakage current on all other signal pins PCF8575 CONDITIONS MIN. TYP. MAX. UNIT VI = VDD or VSS −10 − +10 µA Input SCL; input/output SDA IOL LOW-level output current VOL = 0.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus PCF8575 11 I2C-BUS TIMING CHARACTERISTICS See Fig.13 and note 1. SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT − 400 − 50 ns 1.3 − µs START condition set-up time 0.6 − µs tHD;STA START condition hold time 0.6 − µs tLOW SCL LOW time 1.3 − µs tHIGH SCL HIGH time 0.6 − µs tr SCL and SDA rise time note 3 20 + 0.1Cb 300 ns tf SCL and SDA fall time note 3 20 + 0.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus PCF8575 12 DEVICE PROTECTION handbook, full pagewidth INT A1 A2 P00 P01 P02 P03 P04 P05 P06 P07 VSS VDD 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 substrate VSS MGR789 Fig.14 Device protection diagram.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus PCF8575 13 PACKAGE OUTLINE SSOP24: plastic shrink small outline package; 24 leads; body width 5.3 mm D SOT340-1 E A X c HE y v M A Z 24 13 Q A2 A (A 3) A1 pin 1 index θ Lp L 1 12 bp e detail X w M 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) θ mm 2.0 0.21 0.05 1.80 1.65 0.25 0.38 0.25 0.20 0.09 8.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus • Use a double-wave soldering method comprising a turbulent wave with high upward pressure followed by a smooth laminar wave. 14 SOLDERING 14.1 Introduction to soldering surface mount packages • For packages with leads on two sides and a pitch (e): This text gives a very brief insight to a complex technology.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus 14.5 PCF8575 Suitability of surface mount IC packages for wave and reflow soldering methods SOLDERING METHOD PACKAGE REFLOW(1) WAVE HLQFP, HSQFP, HSOP, SMS not suitable(2) suitable PLCC(3), suitable suitable SO recommended(3)(4) LQFP, QFP, TQFP not SQFP not suitable SSOP, TSSOP, VSO not suitable suitable recommended(5) suitable Notes 1. All surface mount (SMD) packages are moisture sensitive.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus PCF8575 15 DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications.
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus NOTES 1999 Apr 07 21 PCF8575
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus NOTES 1999 Apr 07 22 PCF8575
Philips Semiconductors Product specification Remote 16-bit I/O expander for I2C-bus NOTES 1999 Apr 07 23 PCF8575
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