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PCA9554 Dataheets PDF



Part Number PCA9554
Manufacturers Texas Instruments
Logo Texas Instruments
Description Remote 8-Bit I2C AND SMBus I/O Expander
Datasheet PCA9554 DatasheetPCA9554 Datasheet (PDF)

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community 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 • In.

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community 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) A1 A0 VCC SDA A1 A0 VCC SDA 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 P3 GND P4 P5 P3 GND P4 P5 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 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 .......


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