79LV0408RT2FI-20

79LV0408 Low Voltage 4 Megabit (512k x 8-bit) EEPROM CE 1 RS E R /B WE OE A0-16 128K x 8 128K x 8 128K x 8 128K x 8 CE 2 CE 3 CE 4 I/O0-7 Logic Diagram Memory FEATURES: • Four 128k x 8-bit EEPROMs MCM • RAD-PAK® radiation-hardened against natural space radiation • Total dose hardness: - > 100 krad (Si), depending upon space mission • Excellent Single Event Effects - SEL > 120 MeV/mg/cm2 - SEU > 90 MeV/mg/cm2 read mode - SEU = 18 MeV/mg/cm2 write mode • Package: • - 40 pin RAD-PAK® flat pack • - 40 pin X-Ray PakTM flat pack • - 40 pin Rad-Tolerant flat pack • High speed: -200 and 250 ns access times available • Data Polling and Ready/Busy signal • Software data protection • Write protection by RES pin • High endurance - 10,000 erase/write (in Page Mode), - 10 year data retention • Page write mode: 1 to 128 byte page • Low power dissipation - 88 mW/MHz active mode - 440 µ W standby mode DESCRIPTION: Maxwell Technologies’ 79LV0408 multi-chip module (MCM) memory features a greater than 100 krad (Si) total dose tolerance, depending upon space mission. Using Maxwell Technologies’ patented radiation-hardened RAD-PAK® MCM packaging technology, the 79LV0408 is the first radiationhardened 4 Megabit MCM EEPROM for space applications. The 79LV0408 uses four 1 Megabit high-speed CMOS die to yield a 4 Megabit product. The 79LV0408 is capable of in-system electrical Byte and Page programmability. It has a 128 bytes Page Programming function to make its erase and write operations faster. It also features Data Polling and a Ready/ Busy signal to indicate the completion of erase and programming operations. In the 79LV0408, hardware data protection is provided with the RES pin, in addition to noise protection on the WE signal. Software data protection is implemented using the JEDEC optional standard algorithm. Maxwell Technologies' patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or space mission. In a GEO orbit, the RAD-PAK® package provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Maxwell Technologies self-defined Class K. 01.11.05 Rev 7 All data sheets are subject to change without notice 1 (858) 503-3300 - Fax: (858) 503-3301- www.maxwell.com ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM 79LV0408 DESCRIPTION TABLE 1. 79LV0408 PIN DESCRIPTION PIN 16-9, 32-31, 28, 30, 8, 33, 7, 36, 6 17-19, 22-26 29 2, 3, 39, 38 34 1, 27, 40 4, 20, 21, 37 5 35 SYMBOL A0 to A16 Address Input I/O0 to I/O7 OE CE1-4 WE VCC VSS RDY/BUSY RES Data Input/Output Output Enable Chip Enable 1 through 4 Write Enable Power Supply Ground Ready/Busy Reset Memory TABLE 2. 79LV0408 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Input Voltage Package Weight Thermal Resistance ( RP Package) Operating Temperature Range Storage Temperature Range SYMBOL VCC VIN RP RT Tjc TOPR TSTG -55 -65 MIN -0.6 -0.51 MAX 7.0 7.0 23 10 7.3 125 150 ° C/W °C °C UNIT V V Grams 1. VIN MIN = -3.0V FOR PULSE WIDTH VOL High-Z --VOL High-Z 01.11.05 Rev 7 All data sheets are subject to change without notice 6 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM FIGURE 1. READ TIMING WAVEFORM 79LV0408 Memory 01.11.05 Rev 7 All data sheets are subject to change without notice 7 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM FIGURE 2. BYTE WRITE TIMING WAVEFORM(1) (WE CONTROLLED) 79LV0408 Memory 01.11.05 Rev 7 All data sheets are subject to change without notice 8 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM FIGURE 3. BYTE WRITE TIMING WAVEFORM (2) (CE CONTROLLED) 79LV0408 Memory 01.11.05 Rev 7 All data sheets are subject to change without notice 9 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM FIGURE 4. PAGE WRITE TIMING WAVEFORM(1) (WE CONTROLLED) 79LV0408 Memory 01.11.05 Rev 7 All data sheets are subject to change without notice 10 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM FIGURE 5. PAGE WRITE TIMING WAVEFORM(2) (CE CONTROLLED) 79LV0408 Memory FIGURE 6. DATA POLLING TIMING WAVEFORM 01.11.05 Rev 7 All data sheets are subject to change without notice 11 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM 79LV0408 FIGURE 7. SOFTWARE DATA PROTECTION TIMING WAVEFORM(1) (IN PROTECTION MODE) FIGURE 8. SOFTWARE DATA PROTECTION TIMING WAVEFORM(2) (IN NON-PROTECTION MODE) Memory Toggle Bit Waveform EEPROM APPLICATION NOTES This application note describes the programming procedures for each EEPROM module (four in each MCM) and details of various techniques to preserve data protection. Automatic Page Write Page-mode write feature allows from 1 to 128 bytes of data to be written into the EEPROM in a single write cycle, and allows the undefined data within 128 bytes to be written corresponding to the undefined address (A0 to A6). Loading the first byte of data, the data load window opens 30 µ s for the second byte. In the same manner each additional byte of data can be loaded within 30 µ s. In case CE and WE are kept high for 100 µ s after data input, the EEPROM enters erase and write mode automatically and only the input data are written into the EEPROM. 01.11.05 Rev 7 All data sheets are subject to change without notice 12 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM WE CE Pin Operation 79LV0408 During a write cycle, addresses are latched by the falling edge of WE or CE, and data is latched by the rising edge of WE or CE. Data Polling Data Polling function allows the status of the EEPROM to be determined. If the EEPROM is set to read mode during a write cycle, an inversion of the last byte of data to be loaded output is from I/O 7 to indicate that the EEPROM is performing a write operation. RDY/Busy Signal RDY/Busy signal also allows a comparison operation to determine the status of the EEPROM. The RDY/Busy signal has high impedance except in write cycle and is lowered to VOL after the first write signal. At the-end of a write cycle, the RDY/Busy signal changes state to high impedance. RES Signal When RES is LOW, the EEPROM cannot be read and programmed. Therefore, data can be protected by keeping RES low when VCC is switched. RES should be kept high during read and programming because it doesn’t provide a latch function. Memory Data Protection To protect the data during operation and power on/off, the EEPROM has the internal functions described below. 1. Data Protection against Noise of Control Pins (CE, OE, WE) during Operation. 01.11.05 Rev 7 All data sheets are subject to change without notice 13 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM 79LV0408 During readout or standby, noise on the control pins may act as a trigger and turn the EEPROM to programming mode by mistake. To prevent this phenomenon, the EEPROM has a noise cancellation function that cuts noise if its width is 20 ns or less in programming mode. Be careful not to allow noise of a width of more than 20ns on the control pins. 2. Data Protection at VCC on/off Memory When VCC is turned on or off, noise on the control pins generated by external circuits, such as CPUs, may turn the EEPROM to programming mode by mistake. To prevent this unintentional programming, the EEPROM must be kept in unprogrammable state during VCC on/off by using a CPU reset signal to RES pin. RES should be kept at VSS level when VCC is turned on or off. The EEPROM breaks off programming operation when RES becomes low, programming operation doesn’t finish correctly in case that RES falls low during programming operation. RES should be kept high for 10 ms after the last data input. 10mS min 3. Software Data Protection The software data protection function is to prevent unintentional programming caused by noise generated by external circuits. In software data protection mode, 3 bytes of data must be input before write data as follows. These bytes can switch the nonprotection mode to the protection mode. 01.11.05 Rev 7 All data sheets are subject to change without notice 14 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM 79LV0408 Software data protection mode can be canceled by inputting the following 6 bytes. Then, the EEPROM turns to the non-protection mode and can write data normally. However, when the data is input in the canceling cycle, the data cannot be written. Memory 01.11.05 Rev 7 All data sheets are subject to change without notice 15 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM 79LV0408 Pin #1 ID Memory 40 PIN RAD-PAK® PACKAGE DIMENSIONS SYMBOL MIN A b c D E E1 E2 E3 e L Q S1 N 0.380 0.214 0.005 0.248 0.013 0.006 -0.985 -0.890 0.000 DIMENSION NOM 0.274 0.015 0.008 0.850 0.995 -0.895 0.050 0.040 BSC 0.390 0.245 0.038 40 0.400 0.270 -MAX 0.300 0.022 0.010 0.860 1.005 1.025 --- F40-01 Note: All dimensions in inches 16 01.11.05 Rev 7 All data sheets are subject to change without notice ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM 79LV0408 Memory 40 PIN X-RAY-PAKTM FLAT PACKAGE DIMENSIONS SYMBOL MIN A b c D E E2 E3 e L Q S1 N 0.340 0.050 -0.248 0.013 0.006 0.840 0.985 --DIMENSION NOM 0.274 0.015 0.008 0.850 0.995 0.785 0.105 0.040 BSC 0.350 0.065 0.035 40 0.400 0.075 -MAX 0.300 0.022 0.010 0.860 1.005 --- NOTE: All Dimensions in Inches 01.11.05 Rev 7 All data sheets are subject to change without notice 17 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM 79LV0408 Memory 40 PIN RAD-TOLERANT FLAT PACKAGE DIMENSIONS SYMBOL MIN A b c D E E1 E2 E3 e L Q S1 N 0.380 0.190 0.005 0.202 0.013 0.006 -0.985 -0.890 0.000 DIMENSION NOM 0.224 0.015 0.008 0.850 0.995 -0.895 0.050 0.040 BSC 0.390 0.220 0.038 40 0.400 0.270 -MAX 0.246 0.022 0.010 0.860 1.005 1.025 --- NOTE: All Dimensions in Inches 01.11.05 Rev 7 All data sheets are subject to change without notice 18 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM Important Notice: 79LV0408 These data sheets are created using the chip manufacturers published specifications. Maxwell Technologies verifies functionality by testing key parameters either by 100% testing, sample testing or characterization. The specifications presented within these data sheets represent the latest and most accurate information available to date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no responsibility for the use of this information. Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems without express written approval from Maxwell Technologies. Any claim against Maxwell Technologies. must be made within 90 days from the date of shipment from Maxwell Technologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts. Memory Product Ordering Options 01.11.05 Rev 7 All data sheets are subject to change without notice 19 ©2005 Maxwell Technologies All rights reserved. Low Voltage 4 Megabit (512k x 8-bit) EEPROM MCM 79LV0408 Model Number 79LV0408 XX F X -XX Feature Access Time Option Details 20 = 200 ns 25 = 250 ns Screening Flow Multi Chip Module (MCM)1 K = Maxwell Self-Defined Class K H = Maxwell Self-Defined Class H I = Engineering (testing @-55°C, +25°C and +125°C) E = Engineering (testing @ +25°C Memory Package F = Flat Pack Radiation Feature RP = RAD-PAK® package RT1 = Guaranteed to 10 krad at die level RT2 = Guaranteed to 25 krad at die level RT4 = Guaranteed to 40 krad at die level XP = X-Ray Pak 4 Megabit (512k x 8-bit) EEPROM MCM Base Product Nomenclature 1) Products are manufactured and screened to Maxwell Technologies self-defined Class H and Class K flows. 01.11.05 Rev 7 All data sheets are subject to change without notice 20 ©2005 Maxwell Technologies All rights reserved.