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PCA9557DR Datasheet(PDF) 1 Page - Texas Instruments |
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PCA9557DR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 36 page 1 FEATURES RGVPACKAGE (TOP VIEW) 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 A1 A2 P0 A0 P4 P7 P6 P5 D,DB,DGV,ORPWPACKAGE (TOP VIEW) 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 P1 A1 A2 P0 A0 GND SCL SDA V CC P4 P7 RESET P3 P6 P2 P5 RGYPACKAGE (TOP VIEW) 5 6 7 10 11 12 13 14 15 16 1 2 3 4 SDA A1 A2 P0 A0 P1 8 9 P4 P7 RESET P6 P3 P5 DESCRIPTION/ORDERING INFORMATION PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH RESET AND CONFIGURATION REGISTERS • Low Standby Current Consumption of • Internal Power-On Reset 1 µA Max • High-Impedance Open Drain on P0 • I2C to Parallel Port Expander • Power Up With All Channels Configured as • Operating Power-Supply Voltage Range of Inputs 2.3 V to 5.5 V • No Glitch on Power Up • 5-V Tolerant I/O Ports • Noise Filter on SCL/SDA Inputs • 400-kHz Fast I2C Bus • Latched Outputs With High Current Drive • Three Hardware Address Pins Allow for Use of Maximum Capability for Directly Driving LEDs up to Eight Devices on I2C/SMBus • Latch-Up Performance Exceeds 100 mA Per • Lower-Voltage Higher-Performance Migration JESD 78, Class II Path for PCA9556 • ESD Protection Exceeds JESD 22 • Input/Output Configuration Register – 2000-V Human-Body Model (A114-A) • Polarity Inversion Register – 200-V Machine Model (A115-A) • Active-Low Reset Input – 1000-V Charged-Device Model (C101) 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. The device provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)]. The PCA9557 consists of one 8-bit configuration (input or output selection), input port, output port, and polarity inversion (active-high) registers. At power on, the I/Os are configured as inputs. 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 device outputs (latched) have high-current drive capability for directly driving LEDs. The device has low current consumption. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2008, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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