M34C00MN

M34C00 3 x 128 bit Serial I²C Bus EEPROM For ee-Tags PRELIMINARY DATA s Two-Wire I2C Serial Interface Supports 400 kHz Protocol 2.5 V to 5.5 V Single Supply Voltage 384-bit EEPROM divided in three areas: – 128 bits of non-erasable memory – 128 bits of standard EEPROM – 128 bits that can be permanently Writeprotected (to behave as ROM) s s 8 1 SO8 (MN) 150 mil width TSSOP8 (DW) 169 mil width s s s s Self-Timed Program Cycle Enhanced ESD/Latch-Up Protection More than 1 Million Erase/Write Cycles More than 40 Year Data Retention DESCRIPTION The M34C00 is a 384-bit serial EEPROM. The bottom third of the memory area (from location 00h to 0Fh) can be Write-protected using a specially designed software Write-protection mechanism. By sending the device a specific sequence, the first 128 bits of the memory become permanently Write-protected. Care must be taken when using this sequence as its effect cannot be reversed. The top third of the memory area (from location 20h to 2Fh) is already configured to give the functional equivalence of a non-erasable memory. That is, it is initialized to all 1s (FFh), and the user is able to reset any number of those 1s to 0; but there is no mechanism for the user to set a 0 back to a 1. The M34C00 is a 384-bit electrically erasable programmable memory (EEPROM), organized as 48 x 8 bits. Figure 1. Logic Diagram VCC SCL M34C00 SDA Table 1. Signal Names SDA SCL VCC VSS Serial Data Serial Clock Supply Voltage Ground VSS AI03394 August 2001 ...