PCA8550_06 Datasheet, PDF (1/12 Pages) Texas Instruments – NONVOLATILE 5-BIT REGISTER WITH I2C INTERFACE

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FEATURES
• 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
PCA8550
NONVOLATILE 5-BIT REGISTER
WITH I²C INTERFACE
SCPS050C – MARCH 1999 – REVISED MAY 2005
D, DB, OR PW PACKAGE
(TOP VIEW)
I²C SCL 1
I²C SDA 2
OVERRIDE 3
MUX IN A 4
MUX IN B 5
MUX IN C 6
MUX IN D 7
GND 8
16 VCC
15 WP
14 NON-MUXED OUT
13 MUX SELECT
12 MUX OUT A
11 MUX OUT B
10 MUX OUT C
9 MUX OUT D
DESCRIPTION/ORDERING INFORMATION
This 4-bit 1-of-2 multiplexer with I²C input interface is designed for 3-V to 3.6-V V_CC 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 V_CC level is passed.
The PCA8550 is characterized for operation from 0°C to 70°C.
T_A
0°C to 70°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
SOIC – D
Tube of 40
Reel of 2500
PCA8550D
PCA8550DR
SSOP – DB
Reel of 2000
PCA8550DBR
TSSOP – PW
Reel of 2000
PCA8550PWR
TOP-SIDE MARKING
PCA8550
(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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2005, Texas Instruments Incorporated