X24321 Datasheet (data sheet) PDF





X24321 Datasheet, 400 KHz 2-Wire Serial E2PROM

X24321   X24321  

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32K X24321 400 KHz 2-Wire Serial E2PROM 4K x 8 Bit FEATURES • • • • • • • • • 1.8V to 3.6 V, 2.5V to 5.5V and 4.5V to 5.5V Power Supply Operation Low Power CMOS —Acti ve Read Current Less Than 1mA —Active Write Current Less Than 3mA —Standby Current Less Than 1µA 400KHz Fast Mod e 2-Wire Serial Interface —Down to 1. 8V —Schmitt Trigger Input Noise Suppr ession —Output Slope Control for Grou nd Bounce Noise Elimination Internally Organized 4K x 8 Bit 32 Byte Page Write Mode —Minimizes Total Write Time Per Byte Hardware Write Protect Bidirectio nal Data Transfer Protocol Self-Timed W rite Cycle —Typical Write Cycle Time of 5ms High Reliability

X24321 Datasheet, 400 KHz 2-Wire Serial E2PROM

X24321   X24321  
—Endurance: 1,000,000 Cycles —Data Retention: 100 Years 8-Lead SOIC DESCR IPTION The X24321 is a CMOS Serial E2PR OM Memory, internally organized 4K x 8. The device features a serial interface and software protocol allowing operati on on a simple two wire bus. The bus op erates at 400KHz all the way down to 1. 8V. Three device select inputs (S0–S2 ) allow up to eight devices to share a common two wire bus. Hardware Write Pro tection is provided through a Write Pro tect (WP) input pin on the X24321. When the WP pin is HIGH, the upper quadrant of the Serial E2PROM array is protecte d against any nonvolatile write attempt s. Xicor Serial E2PROM Memories are des igned and tested for applications requi ring extended endurance. Inherent data retention is greater than 100 years. F UNCTIONAL DIAGRAM SERIAL E2PROM DATA A ND ADDRESS (SDA) DATA REGISTER Y DECOD E LOGIC COMMAND DECODE AND CONTROL LOGI C SCL PAGE DECODE LOGIC S2 S1 S0 DEV ICE SELECT LOGIC WRITE PROTECT LOGIC E 2PROM ARRAY 4K x 8 WP WRITE VOLTAGE C ONTROL 7040 FM 01 ©Xicor, 1995, 1996 Patents Pending 7040 3/27/97 T0/C0/D0 S H 1 Characteristics subject to change without notice X24321 PIN DESCRIPTION S Serial Clock (SCL) The SCL input is u sed to clock all data into and out of t he device. Serial Data (SDA) SDA is a bidirectional pin us








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