EEPROMs MN63121 1K-Bit EEPROM Overview The MN63121 is a 1K-bit EEPROM supporting serial I/O and operating on a single power supply with a voltage between 1.8 and 5.5 V. It provides the following pins for easy interfacing to microprocessors or microcontrollers: chip select (CS), serial clock (SCK), data input (DI), data output (DO), reset (RESET), and busy (RDY/BUSY). It includes a built-in timer for use in automatically erasing and writing data during data update operations. The memory organization is 64 × 16 bits. The chip indicates the end of a write operation with either the RDY/ BUSY pin or the state of the DO pin after the status output mode has been set. Conversion of peripheral circuits to CMOS realizes great reductions in power consumption. Use of floating gate memory cells and a built-in error correction circuit ensures reliable operation for 105 write cycles. Pin Assignment CS 1 8 VCC SCK 2 7 RDY/BUSY DI 3 6 RESET DO 4 5 GND ( TOP VIEW ) DIP008-P-0300A Features Memory organization: 64 × 16 bits Floating gate memory cells Function blocking erroneous writes Low power consumption - Reads: max. 6.6 mW for VCC = 3.3 V - Standby: max. 66 µW for VCC = 3.3 V Built-in self-timer for use in automatically erasing and writing Built-in error correction circuit that guarantees 105 write cycles 10-year data preservation period Applications Keyless entry systems, cordless telephones, storage for recognition and adjustment data for terminals, etc. 1 MN63121 EEPROMs 5 8 VCC GND Block Diagram Memory array Address decoder 64 × 16 Error correction circuit Data register CS 1 2 Mode decode logic Clock generator RDY/BUSY 7 SCK 6 2 4 RESET Output buffer 3 DO DI EEPROMs MN63121 Pin Descriptions Pin No. 1 Symbol CS Pin Name Chip select input 2 SCK Serial clock input 3 DI Data input 4 DO Data output 6 RESET Reset input 7 RDY/BUSY Busy output Electrical Characteristics VCC=1.8 to 5.5V, Ta=–10˚C to +70˚C 2 to 3 V Operation 5 V Operation Parameter Symbol Test Conditions Unit min max min max VCC 1.8 3.3 4.5 5.5 V Input leakage current at "L" level ILIL –10 10 –10 10 µA Input leakage current at "H" level ILIH –10 10 –10 10 µA Output leakage current ILO — 10 — 10 µA Input voltage at "L" level VIL – 0.1 0.7 V Power supply voltage Input voltage at "H" level VCC power supply current ICC ISB (during standby) VCC 0.8 × VCC VCC +0.3 SCK=250kHz — 2.0 — — SCK=1MHz — — — 3.0 CS, SCK, DI, — 20 — 30 µA IOL=400 µA — 0.3 — — V IOL=2.1mA — — — 0.45 — — — — 2.4 — VIH (during operation) VCC power supply current – 0.1 0.2 × 3.0 VCC +0.3 V mA RESET="H" Other pins open Output voltage for "L" level (during reads) VOL Output voltage for "H" level (during reads) VOH VCC IOH=–10 µA – 0.3 IOH=–400 µA — V Function Descriptions Orders READ Code 10101000 Address A0A1A2A3A4A500 Data D0 –D7D8–D15 Read from address indicated with pins A0 –A5 WRITE 10100100 A0A1A2A3A4A500 D0 –D7D8–D15 Write to address indicated with pins A0 –A5 EWEN 10100011 xxxxxxxx –––– Enable erase/write EWDS 10100000 xxxxxxxx –––– Disable erase/write BUSYFG 00xxxxxx 0(busy) Function Status output busy flag 1(ready) ENFG 10101001 ECCFG 10xxxxxx 0(enable) Status output write enable flag 1(disable) 01xxxxxx 0(non-correction) Status output ECC flag 1(correction) Note: x means "don't care". 3 MN63121 EEPROMs Package Dimensions (Unit:mm) 1 4 4 2.54 0.50±0.10 3.30±0.20 0.70 min. 3.45±0.30 4.80 max. 9.60±0.40 0.70±0.10 1.30±0.10 SEATING PLANE 5° 0° to 1 5 6.40±0.20 8 7.62±0.20 +0.20 0.25 –0.05 DIP008-P-0300A