BR9040F-WE2 ROHM

BR9010-W / F-W / FV-W / RFV-W / RFVM-W / BR9020-W / F-W / FV-W / Memory IC RFV-W / RFVM-W / BR9040-W / F-W / FV-W / RFV-W / RFVM-W 1k, 2k, 4k, bit EEPROMs for direct connection to serial ports BR9010-W / BR9010F-W / BR9010FV-W / BR9010RFV-W / BR9010RFVM-W BR9020-W / BR9020F-W / BR9020FV-W / BR9020RFV-W / BR9020RFVM-W BR9040-W / BR9040F-W / BR9040FV-W / BR9040RFV-W / BR9040RFVM-W The BR90XX series are serial EEPROMs that can be connected directly to a serial port and can be erased and written electrically. Writing and reading is perfomed in word units, using four types of operation commands. Communication occurs through CS, SK, DI, and DO pins, WC pin control is used to initiate a write disabled state, enabling these EEPROMs to be used as one-time ROMs. During writing operation is checked via the internal status check. z z Application z z General-Purpose z Features 1) BR9010-W / F-W / FV-W / RFV-W / RFVM-W (1k bit) : 64 words 16bit BR9020-W / F-W / FV-W / RFV-W / RFVM-W (2k bit) : 128words 16bit BR9040-W / F-W / FV-W / RFV-W / RFVM-W (4k bit) : 256words 16bit 2) Single power supply. 3) Serial data I/O. 4) Self-timed programming cycle with auto-erase. 5) Low supply current. Active (5V) : 2mA (max.) Standby (5V) : 3 A (max.) (CMOS INPUT) 6) Noise filter on the SK pin. Write protection when the supply is low. 7) Write protection by WC pin. 8) Space Saving DIP8/SOP8/SSOP-B8/MSOP8pin Packages. 9) 100,000 erase/ write cycles endurance. 10) Provide 10 years of date retention. 11) Easy connection to serial port. 12) FFFFh stored in all address on shipped. 1/14 BR9010-W / F-W / FV-W / RFV-W / RFVM-W / BR9020-W / F-W / FV-W / Memory IC RFV-W / RFVM-W / BR9040-W / F-W / FV-W / RFV-W / RFVM-W zz zz Block diagram R / B CS Command decode Power supply Control voltage detector Clock generation High voltage WC Write disable SK generator 6bitBR9010 6bitBR9010 Address Address 1,024bit BR9010 7bitBR9020 7bitBR9020 Command buffer decoder 8bitBR9040 8bitBR9040 2,048bit BR9020 DI register 4,096bit BR9040 EEPROM Data R / W array 16bit register amplifier 16bit DO z z Terminal Function z z Pin No. Pin name Function BR90xxF-W/FV-W BR90xx-W/RFV-W/RFVM-W 1 3 Chip Select Input CS 2 4 Serial Date Clock Input SK 3 Serial Date Input (Op code, address) 5 DI 4 6 DO Serial Date Output 5 7 GND Ground (0V) 6 8 Write Control Input WC 7 1 READY/ BUSY Status Output R / B 8 2 VCC Power Supply 2/14