FM24C256FYYX

FM24C256 256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect June 2000 FM24C256 256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect General Description The FM24C256/C256L/C256LZ devices are 256 Kbits CMOS nonvolatile electrically erasable memory. These devices offer the designer different low voltage and low power options. They conform to all requirements in the Extended IIC 2-wire protocol. Furthermore, they are designed to minimize device pin count and simplify PC board layout requirements. The entire memory array can be write disabled (Write Protection) by connecting the WP pin to VCC. Functional address lines allow up to eight devices on the same bus, for up to a total of 2 Mbit address space. The IIC communication protocol uses CLOCK (SCL) and DATA I/O (SDA) lines to synchronously clock data between the master (for example a microprocessor) and the slave EEPROM device(s). Fairchild EEPROMs are designed and tested for applications requiring high endurance, high reliability, and low power consumption. Features I Extended Operating Voltages — C256: 4.5V - 5.5V — C256L: 2.7V - 5.5V — C256LZ: 2.7V - 5.5V I Low Power CMOS — 1mA active current typical — C256/C256L: 10µA standby current typical — C256LZ: less than 1µA standby current I 2-wire IIC serial interface I 64 byte page write mode I Max write cycle time of 6ms byte/page I 40 years data retention I Endurance: 100,000 data changes I Hardware write protect for entire array I Schmitt trigger inputs for noise suppression I Electrostatic discharge protection > 4000V I 8-pin DIP and 8-pin SO (150 mil) packages. Contact factory for CSP package availability Block Diagram VCC WP SDA START STOP LOGIC CONTROL LOGIC SLAVE ADDRESS REGISTER & COMPARATOR LOAD A2 A1 A0 WORD ADDRESS COUNTER INC E2PROM ARRAY WRITE LOCKOUT START CYCLE H.V. GENERATION TIMING &CONTROL SCL XDEC R/W YDEC CK DIN DATA REGISTER DOUT DS800023-1 © 2000 Fairchild Semiconductor International FM24C256 rev. B.3 1 www.fairchildsemi.com FM24C256 256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect Connection Diagram Dual-In-Line Package (N) and 8-Pin SO Package (M8) A0 A1 A2 VSS 1 2 FM24C256 3 4 6 5 SCL SDA DS800023-2 8 7 VCC WP Top View See Package Number N08E and M08A Pin Names A0, A1, A2 VSS SDA SCL WP VCC Device Address Input Ground Data I/O Clock Input Write Protect Power Supply 2 FM24C256 rev. B.3 www.fairchildsemi.com FM24C256 256 KBit 2-Wire Bus Interface Serial EEPROM with Write Protect Ordering Information Commercial Temperature Range: 0° to +70°C Part Number FM24C256YYX FM24C256LYYX FM24C256LZYYX FM24C256FYYX FM24C256FLYYX FM24C256FLZYYX 400KHz 4.5V - 5.5V 2.7V - 5.5V 1µA max 100KHz Clock Frequency VCC 4.5V - 5.5V 2.7V - 5.5V Standby Current 10µA typical 1µA max 10µA typical Industrial Temperature Range: -40° to +85°C Part Number FM24C256EYYX FM24C256LEYYX FM24C256LZEYYX FM24C256FEYYX FM24C256FLEYYX FM24C256FLZEYYX 400KHz 4.5V - 5.5V 2.7V - 5.5V 1µA max 100KHz Clock Frequency VCC 4.5V - 5.5V 2.7V - 5.5V Standby Current 10µA typical 1µA max 10µA typical FM 24 C XX F LZ E YY X Letter Blank X Package N M8 Blank E Blank L LZ Blank F 256 C Interface 24 FM Description Tube Tape and Reel 8-pin DIP 8-pin SO8 0 to 70°C -40 to +85°C 4.5V to 5.5V 2.7V to 5.5V 2.7V to 5.5V and