NM24C05U

NM24C04U/NM24C05U – 4K-Bit Serial EEPROM 2-Wire Bus Interface August 1999 NM24C04U/NM24C05U 4K-Bit Serial EEPROM 2-Wire Bus Interface General Description The NM24C04U/05U devices are 4K (4,096) bit serial interface CMOS EEPROMs (Electrically Erasable Programmable ReadOnly Memory). These devices fully conform to the Standard I2C™ 2-wire protocol which uses Clock (SCL) and Data I/O (SDA) pins to synchronously clock data between the "master" (for example a microprocessor) and the "slave" (the EEPROM device). In addition, the serial interface allows a minimal pin count packaging designed to simplify PC board layout requirements and offers the designer a variety of low voltage and low power options. NM24C05U incorporates a hardware "Write Protect" feature, by which, the upper half of the memory can be disabled against programming by connecting the WP pin to VCC. This section of memory then effectively becomes a ROM (Read-Only Memory) and can no longer be programmed as long as WP pin is connected to VCC. Fairchild EEPROMs are designed and tested for applications requiring high endurance, high reliability and low power consumption for a continuously reliable non-volatile solution for all markets. Functions I I2C™ compatible interface I 4,096 bits organized as 512 x 8 I Extended 2.7V – 5.5V operating voltage I 100 KHz or 400 KHz operation I Self timed programming cycle (6ms typical) I "Programming complete" indicated by ACK polling I NM24C05U: Memory "Upper Block" Write Protect pin Features I The I2C™ interface allows the smallest I/O pincount of any EEPROM interface I 16 byte page write mode to minimize total write time per byte I Typical 200µA active current (ICCA) I Typical 1µA standby current (ISB) for "L" devices and 0.1µA standby current for "LZ" devices I Endurance: Up to 1,000,000 data changes I Data retention greater than 40 years Block Diagram VCC VSS WP H.V. GENERATION TIMING &CONTROL START STOP LOGIC CONTROL LOGIC SLAVE ADDRESS REGISTER & COMPARATOR E2PROM ARRAY SDA SCL XDEC A2 A1 WORD ADDRESS COUNTER R/W YDEC CK DIN DATA REGISTER DOUT I2C™ is a registered trademark of Philips Electronics N.V. DS800008-1 © 1999 Fairchild Semiconductor Corporation NM24C04U/NM24C05U Rev. C.1 1 www.fairchildsemi.com NM24C04U/NM24C05U – 4K-Bit Serial EEPROM 2-Wire Bus Interface Connection Diagrams Dual-in-Line Package (N), SO Package (M8), and TSSOP Package (MT8) NC A1 A2 VSS 1 2 3 4 8 7 VCC NC SCL SDA DS800008-2 NM24C04U 6 5 Top View See Package Number N08E, M08A, and MTC08 Pin Names A1,A2 VSS SDA SCL NC VCC Device Address Inputs Ground Serial Data I/O Serial Clock Input No Connection Power Supply Dual-in-Line Package (N), SO Package (M8), and TSSOP Package (MT8) NC A1 A2 VSS 1 2 3 4 8 7 VCC WP SCL SDA DS800008-3 NM24C05U 6 5 Top View See Package Number N08E, M08A, and MTC08 Pin Names NC A1,A2 VSS SDA SCL WP VCC No Connection Device Address Inputs Ground Serial Data I/O Serial Clock input Write Protect Power Supply 2 NM24C04U/NM24C05U Rev. C.1 www.fairchildsemi.com NM24C04U/NM24C05U – 4K-Bit Serial EEPROM 2-Wire Bus Interface Ordering Information NM 24 C XX U F LZ E XX Package Letter N M8 MT8 None V E Blank L LZ Description 8-pin DIP 8-pin SOIC 8-pin TSSOP 0 to 70°C -40 to +125°C -40 to +85°C 4.5V to 5.5V 2.7V to 5.5V 2.7V to 5.5V and