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CAT24C321P-28TE13 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT24C321P-28TE13 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 12 page 9-1 24C1601 BLOCK CAT24C321/322(32K), CAT24C641/642(64K) Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer DESCRIPTION The CAT24CXXX is a single chip solution to three popular functions of EEPROM memory, precision reset controller and watchdog timer. The 24C321/322(32K) and 24C641/642(64K) feature a I2C Serial CMOS EEPROM. Catalyst's advanced CMOS technology sub- stantially reduces device power requirements. The 24CXXX features a 32-byte page and is available in 8-pin DIP or 8-pin SOIC packages. The reset function of the 24CXXX protects the system during brown out and power up/down conditions. During system failure the watchdog timer feature protects the microcontroller with a reset signal. 24CXXX features active low reset on pin 2 and active high reset on pin 7. 24C321/641 features watchdog timer on the SDA line. 24C322/642 does not feature the watchdog timer func- tion. Pin Name Function SDA Serial Data/Address RESET/ RESET Reset I/O SCL Clock Input Vcc Power Supply DC Do not Connect VSS Ground WP Write Protect PIN FUNCITONS PIN CONFIGURATION 24C321/322* 24C641/642* BLOCK DIAGRAM *All products offered in P and J packages Advanced FEATURES © 1998 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice s Watchdog Timer on SDA for 24C321/641 s Programmable Reset Threshold s 400 KHz I2C Bus Compatible s 2.7 to 6 Volt Operation s Low Power CMOS Technology s 32 - Byte Page Write Buffer s Built-in inadvertent write protection — VCC Lock Out s Active High or Low Reset Outputs — Precision Power Supply Voltage Monitoring — 5V, 3.3V and 3V options s 1,000,000 Program/Erase Cycles s 100 Year Data Retention s 8-Pin DIP or 8-Pin SOIC s Commercial, Industrial and Automotive Temperature Ranges Doc. No. 25083-00 12/98 DC VCC RESET SCL SDA RESET WP VSS DOUT ACK SENSE AMPS SHIFT REGISTERS CONTROL LOGIC WORD ADDRESS BUFFERS START/STOP LOGIC E2PROM VCC EXTERNAL LOAD COLUMN DECODERS XDEC DATA IN STORAGE HIGH VOLTAGE/ TIMING CONTROL VSS WP SDA RESET Controller High Precision Vcc Monitor STATE COUNTERS SLAVE ADDRESS COMPARATORS SCL Only for 24C321/641 RESET/ RESET WATCHDOG |
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