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PCA8550D 数据表(PDF) 1 Page - Texas Instruments |
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PCA8550D 数据表(HTML) 1 Page - Texas Instruments |
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1 / 12 page  www.ti.com FEATURES 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 I2C SCL I2C SDA OVERRIDE MUX IN A MUX IN B MUX IN C MUX IN D GND VCC WP NON-MUXED OUT MUX SELECT MUX OUT A MUX OUT B MUX OUT C MUX OUT D D, DB, OR PW PACKAGE (TOP VIEW) DESCRIPTION/ORDERING INFORMATION PCA8550 NONVOLATILE 5-BIT REGISTER WITH I2C INTERFACE SCPS050C – MARCH 1999 – REVISED MAY 2005 • EPIC™ (Enhanced-Performance Implanted CMOS) Submicron Process • Useful for Jumperless Configuration of PC Motherboard • Inputs Accept Voltages to 5.5 V • MUX OUT Signals are 2.5-V Outputs • NON-MUXED OUT Signal is a 3.3-V Output • Minimum of 1000 Write Cycles • Minimum of 10 Years Data Retention • Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages This 4-bit 1-of-2 multiplexer with I2C input interface is designed for 3-V to 3.6-V VCC operation. The PCA8550 is designed to multiplex four bits of data from parallel inputs or from I2C input data stored in a nonvolatile register. An additional bit of register output also is provided, which is latched to prevent changes in the output value during the write cycle. The factory default for the contents of the register is all low. These stored values can be read from, or written to, using the I2C bus. The ability to control writing to the register is provided by the write protect (WP) input. The override (OVERRIDE) input forces all the register outputs to a low. This device provides a fast-mode (400 kbit/s) or standard-mode (100 kbit/s) I2C serial interface for data input and output. The implementation is as a slave. The device address is specified in the I2C interface definition table. Both of the I2C Schmitt-trigger inputs (SCL and SDA) provide integrated pullup resistors and are 5-V tolerant. The PCA8550 requires a monotonic power-supply ramp at start-up in the region of 1.1 V to 2.5 V. The nonvolatile registers and I2C state machine initialize to their default states after this VCC level is passed. The PCA8550 is characterized for operation from 0 °C to 70°C. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING Tube of 40 PCA8550D SOIC – D Reel of 2500 PCA8550DR 0 °C to 70°C PCA8550 SSOP – DB Reel of 2000 PCA8550DBR TSSOP – PW Reel of 2000 PCA8550PWR (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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. EPIC is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 1999–2005, 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. |
类似零件编号 - PCA8550D |
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类似说明 - PCA8550D |
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