CAT93C66

CAT93C66 4 kb Microwire Serial CMOS EEPROM Description The CAT93C66 is a 4 kb CMOS Serial EEPROM device which is organized as either 256 registers of 16 bits (ORG pin at VCC) or 512 registers of 8 bits (ORG pin at GND). Each register can be written (or read) serially by using the DI (or DO) pin. The device features sequential read and self−timed internal write with auto−clear. On−chip Power−On Reset circuitry protects the internal logic against powering up in the wrong state. Features High Speed Operation: 2 MHz 1.8 V to 5.5 V Supply Voltage Range Selectable x8 or x16 Memory Organization: CAT93C66 Sequential Read Software Write Protection Power−up Inadvertent Write Protection Low Power CMOS Technology 1,000,000 Program/Erase Cycles 100 Year Data Retention Industrial Temperature Ranges 8−lead SOIC Package This Device is Pb−Free, Halogen Free/BFR Free, and RoHS Compliant VCC www.onsemi.com SOIC−8 V SUFFIX CASE 751BD PIN CONFIGURATION (Top View) CS 1 SK 2 DI 3 DO 4 8 VCC 7 NC 6 ORG 5 GND SOIC (V) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. ORG CS CAT93C66 DO SK DI GND Figure 1. Functional Symbols CAT93C66 Selectable Organization: When the ORG pin is connected to VCC, the x16 organization is selected. When it is connected to ground, the x8 organization is selected. If the ORG pin is left unconnected, then an internal pull−up device will select the x16 org...