28C011T 1 Megabit (128K x 8-Bit) EEPROM VCC High Voltage Generator VSS I/O0 I/O7 RDY/Busy RES I/O Buffer and Input Latch OE CE Control Logic Timing WE RES A0 28C011T Y Decoder Y Gating X Decoder Memory Array A6 Address Buffer and Latch A7 A16 Data Latch Memory Logic Diagram FEATURES: DESCRIPTION: • 128k x 8-bit EEPROM • RAD-PAK® radiation-hardened against natural space radiation • Total dose hardness: - > 100 krad (Si), depending upon space mission • Excellent Single Event Effects: - No Latchup > 120 MeV/mg/cm2 - SEU > 90 MeV/mg/cm2 read mode • Package: - 32-pin RAD-PAK® flat package - 32-pin Rad-Tolerant flat package - JEDEC-approved byte-wide pinout • High speed: - 120, 150, and 200 ns maximum access times available • High endurance: - 10,000 erase/write (in Page Mode), - 10 year data retention • Page write mode: - 1 to 128 bytes • Low power dissipation - 20 mW/MHz active (typical) - 110 µ W standby (maximum) Maxwell Technologies’ 28C011T high-density 1 Megabit (128K x 8-Bit) EEPROM microcircuit features a greater than 100 krad (Si) total dose tolerance, depending upon space mission. The 28C011T is capable of in-system electrical byte and page programmability. It has a 128-byte 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 28C010T, hardware data protection is provided with the RES pin, in addition to noise protection on the WE signal and write inhibit on power on and off. 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, RAD-PAK® provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Class S. 11.10.03 REV 10 (858) 503-3300- Fax: (858) 503-3301 - www.maxwell.com All data sheets are subject to change without notice 1 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM TABLE 1. 28C011T PINOUT DESCRIPTION PIN SYMBOL DESCRIPTION 12-5, 27, 26, 23, 25, 4, 28, 3, 31, 2 A0-A16 24 OE Output Enable 22 CE Chip Enable 29 WE Write Enable 32 VCC Power Supply 16 VSS Ground 1 RDY/BUSY 30 RES Address Ready/Busy Reset TABLE 2. 28C011T ABSOLUTE MAXIMUM RATINGS Supply Voltage (Relative to VSS) Input Voltage (Relative to VSS) SYMBOL MIN VCC -0.6 VIN -0.5 1 MAX UNITS +7.0 V +7.0 V Operating Temperature Range TOPR -55 +125 °C Storage Temperature Range TSTG -65 +150 °C Memory PARAMETER 1. VIN min = -3.0V for pulse width < 50ns. TABLE 3. DELTA LIMITS PARAMETER VARIATION ICC1 ±10% ICC2 ±10% ICC3A ±10% ICC3B ±10% TABLE 4. 28C011T RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Input Voltage RES_PIN Operating Temperature Range SYMBOL MIN MAX UNITS VCC 4.5 5.5 V VIL -0.31 0.8 V VIH 2.2 VCC +0.3 VH VCC -0.5 VCC +1 TOPR -55 +125 °C 1. VIL min = -1.0V for pulse width < 50 ns 11.10.03 REV 10 All data sheets are subject to change without notice 2 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM TABLE 5. 28C011T CAPACITANCE (TA = 25 ° C, f = 1 MHZ) PARAMETER Input Capacitance: VIN = 0V 1 Output Capacitance: VOUT = 0V 1 SYMBOL MIN MAX UNITS CIN -- 6 pF COUT -- 12 pF 1. Guaranteed by design. TABLE 6. 28C011T DC ELECTRICAL CHARACTERISTICS (VCC = 5V ± 10%, TA = -55 TO +125 ° C, UNLESS OTHERWISE SPECIFIED) PARAMETER TEST CONDITION Input Leakage Current SYMBOL MIN MAX UNITS VCC = 5.5V, VIN = 5.5V 1, 2, 3 IIL -- 21 µA Output Leakage Current VCC = 5.5V, VOUT = 5.5V/0.4V 1, 2, 3 ILO -- 2 µA Standby VCC Current CE = VCC 1, 2, 3 ICC1 -- 20 µA ICC2 -- 1 mA mA CE = VIH Operating VCC Current IOUT = 0mA, Duty = 100%, Cycle = 1µ s at VCC = 5.5V 1, 2, 3 ICC3A -- 15 IOUT = 0mA, Duty = 100%, Cycle = 150ns at VCC = 5.5V 1, 2, 3 ICC3B -- 50 1, 2, 3 VIL -- 0.8 VIH 2.2 -- VH VCC -0.5 -- VOL -- 0.4 VOH 2.4 -- Input Voltage RES_PIN Output Voltage IOL = 2.1 mA 1, 2, 3 IOH = -0.4 mA Memory SUBGROUPS V V 1. ILI on RES = 100 uA max. TABLE 7. 28C011T AC ELECTRICAL CHARACTERISTICS FOR READ OPERATION 1 (VCC = 5V + 10%, TA = -55 TO +125 ° C) PARAMETER SYMBOL SUBGROUPS Address Access Time CE = OE = VIL, WE = VIH -120 -150 -200 tACC 9, 10, 11 Chip Enable Access Time OE = VIL, WE = VIH -120 -150 -200 tCE MIN UNITS ns ---- 120 150 200 ns 9, 10, 11 ---- 11.10.03 REV 10 MAX 120 150 200 All data sheets are subject to change without notice 3 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM TABLE 7. 28C011T AC ELECTRICAL CHARACTERISTICS FOR READ OPERATION 1 (VCC = 5V + 10%, TA = -55 TO +125 ° C) PARAMETER SYMBOL SUBGROUPS Output Enable Access Time CE = VIL, WE = VIH -120 -150 -200 tOE 9, 10, 11 Output Hold to Address Change CE = OE = VIL, WE = VIH -120 -150 -200 tOH MIN MAX ns 0 0 0 75 75 100 ns 9, 10, 11 0 0 0 Output Disable to High-Z 2 CE = VIL, WE = VIH -120 -150 -200 CE = OE = VIL, WE = VIH -120 -150 -200 UNITS ---ns 9, 10, 11 tDF RES to Output Delay3 CE = OE = VIL, WE = VIH -120 -150 -200 tRR 50 50 60 0 0 0 300 350 450 Memory tDFR 0 0 0 ns 9, 10, 11 ---- 400 450 650 1. Test conditions: Input pulse levels - 0.4V to 2.4V; input rise and fall times < 20ns; output load - 1 TTL gate + 100pF (including scope and jig); reference levels for measuring timing - 0.8V/1.8V. 2. tDF and tDFR are defined as the time at which the output becomes an open circuit and data is no longer driven. 3. Guaranteed by design. TABLE 8. 28C011T AC ELECTRICAL CHARACTERISTICS FOR PAGE/BYTE ERASE AND BYTE WRITE OPERATIONS (VCC = 5V + 10%, TA = -55 TO +125 ° C) SYMBOL SUBGROUPS Address Setup Time -120 -150 -200 tAS 9, 10, 11 Chip Enable to Write Setup Time (WE controlled) -120 -150 -200 tCS PARAMETER 11.10.03 REV 10 MIN 1 MAX 0 0 0 ---- 0 0 0 ---- UNITS ns 9, 10, 11 ns All data sheets are subject to change without notice 4 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM TABLE 8. 28C011T AC ELECTRICAL CHARACTERISTICS FOR PAGE/BYTE ERASE AND BYTE WRITE OPERATIONS (VCC = 5V + 10%, TA = -55 TO +125 ° C) PARAMETER Write Pulse Width CE controlled -120 -150 -200 WE controlled -120 -150 -200 SYMBOL SUBGROUPS MIN 1 MAX 200 250 350 ---- 200 250 350 ---- 150 150 200 ---- 75 100 150 ---- 10 10 10 ---- 0 0 0 ---- 0 0 0 ---- 0 0 0 ---- 0 0 0 ---- 0 0 0 ---- UNITS 9, 10, 11 ns tCW tWP tAH Data Setup Time -120 -150 -200 tDS Data Hold Time -120 -150 -200 tDH Chip Enable Hold Time (WE controlled) -120 -150 -2000 tCH Write Enable to Write Setup Time (CE controlled) -120 -150 -200 tWS Write Enable Hold Time (CE controlled) -120 -150 -200 tWH Output Enable to Write Setup Time -120 -150 -200 tOES Output Enable Hold Time -120 -150 -200 tOEH 11.10.03 REV 10 ns 9, 10, 11 Memory Address Hold Time -120 -150 -200 ns 9, 10, 11 ns 9, 10, 11 9, 10, 11 ns ns 9, 10, 11 ns 9, 10, 11 ns 9, 10, 11 ns 9, 10, 11 All data sheets are subject to change without notice 5 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM TABLE 8. 28C011T AC ELECTRICAL CHARACTERISTICS FOR PAGE/BYTE ERASE AND BYTE WRITE OPERATIONS (VCC = 5V + 10%, TA = -55 TO +125 ° C) SUBGROUPS Write Cycle Time2 -120 -150 -200 tWC 9, 10, 11 Data Latch Time -120 -150 -200 tDL Byte Load Window -120 -150 -200 tBL Byte Load Cycle -120 -150 -200 tBLC Time to Device Busy -120 -150 -200 tDB Write Start Time3 -120 -150 -200 tDW RES to Write Setup Time -120 -150 -200 tRP VCC to RES Setup Time4 -120 -150 -200 tRES MIN 1 MAX ---- 10 10 10 250 300 400 ---- 100 100 200 ---- 0.55 0.55 0.95 30 30 30 100 120 170 ---- 150 150 250 ---- 100 100 200 ---- 1 1 3 ---- UNITS ms ns 9, 10, 11 µs 9, 10, 11 µs 9, 10, 11 Memory SYMBOL PARAMETER ns 9, 10, 11 ns 9, 10, 11 µs 9, 10, 11 µs 9, 10, 11 1. Use this device in a longer cycle than this value. 2. tWC must be longer than this value unless polling techniques or RDY/BUSY are used. This device automatically completes the internal write operation within this value. 3. Next read or write operation can be initiated after tDW if polling techniques or RDY/BUSY are used. 4. Gauranteed by design. 11.10.03 REV 10 All data sheets are subject to change without notice 6 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM TABLE 9. 28C011T MODE SELECTION 1 PARAMETER CE OE WE I/O RES RDY/BUSY Read VIL VIL VIH DOUT VH High-Z Standby VIH X X High-Z X High-Z Write VIL VIH VIL DIN VH High-Z --> VOL Deselect VIL VIH VIH High-Z VH High-Z Write Inhibit X X VIH -- X -- X VIL X -- X -- Data Polling VIL VIL VIH Data Out (I/O7) VH VOL Program X X X High-Z VIL High-Z 1. X = Don’t care. FIGURE 1. READ TIMING WAVEFORM Memory 11.10.03 REV 10 All data sheets are subject to change without notice 7 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM FIGURE 2. BYTE WRITE TIMING WAVEFORM(1) (WE CONTROLLED) Memory 11.10.03 REV 10 All data sheets are subject to change without notice 8 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM FIGURE 3. BYTE WRITE TIMING WAVEFORM (2) (CE CONTROLLED) Memory 11.10.03 REV 10 All data sheets are subject to change without notice 9 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM FIGURE 4. PAGE WRITE TIMING WAVEFORM(1) (WE CONTROLLED) Memory 11.10.03 REV 10 All data sheets are subject to change without notice 10 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM FIGURE 5. PAGE WRITE TIMING WAVEFORM(2) (CE CONTROLLED) Memory FIGURE 6. DATA POLLING TIMING WAVEFORM 11.10.03 REV 10 All data sheets are subject to change without notice 11 ©2003 Maxwell Technologies All rights reserved. 1 Megabit (128K x 8-Bit) EEPROM 28C011T FIGURE 7. SOFTWARE DATA PROTECTION TIMING WAVEFORM(1) (IN PROTECTION MODE) FIGURE 8. SOFTWARE DATA PROTECTION TIMING WAVEFORM(2) (IN NON-PROTECTION MODE) Memory EEPROM APPLICATION NOTES This application note describes the programming procedures for the EEPROM modules and with details of various techniques to preserve data protection. Automatic Page Write Page-mode write feature allows 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 30µ s for the second byte. In the same manner each additional byte of data can be loaded within 30µ s. In case CE and WE are kept high for 100 µ s after data input, EEPROM enters erase and write mode automatically and only the input data are written into the EEPROM. 11.10.03 REV 10 All data sheets are subject to change without notice 12 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM WE, CE Pin Operation 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 EEPROM is set to read mode during a write cycle, an inversion of the last byte of data to be loaded outputs 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 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. 11.10.03 REV 10 All data sheets are subject to change without notice 13 ©2003 Maxwell Technologies All rights reserved. Memory 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 high during read and programming because it doesn’t provide a latch function. 1 Megabit (128K x 8-Bit) EEPROM 28C011T 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 20ns 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 RES should be kept at VSS level when VCC is turned on or off. The EEPROM breaks off programming operation when RES become 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. 3. Software Data Protection 11.10.03 REV 10 All data sheets are subject to change without notice 14 ©2003 Maxwell Technologies All rights reserved. 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. 1 Megabit (128K x 8-Bit) EEPROM 28C011T 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. 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 11.10.03 REV 10 All data sheets are subject to change without notice 15 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM Memory 32-PIN RAD-PAK® FLAT PACKAGE DIMENSION SYMBOL MIN NOM MAX A 0.117 0.130 0.143 b 0.015 0.017 0.022 c 0.004 0.005 0.009 D -- 0.820 0.830 E 0.404 0.410 0.416 E1 -- -- 0.440 e 0.050BSC L 0.350 0.370 0.390 Q 0.021 0.033 0.036 S1 0.005 0.027 -- N 32 Note: All dimensions in inches 11.10.03 REV 10 All data sheets are subject to change without notice 16 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM Memory 28C011T 32-PIN RAD-TOLERANT FLAT PACKAGE DIMENSION SYMBOL MIN NOM MAX A 0.078 0.087 0.096 b 0.015 0.017 0.022 c 0.004 0.005 0.009 D -- 0.820 0.830 E 0.404 0.410 0.416 E1 -- -- 0.426 e 0.050BSC L 0.390 0.400 0.410 S1 0.005 0.027 -- N 32 Note: All dimensions in inches. 11.10.03 REV 10 All data sheets are subject to change without notice 17 ©2003 Maxwell Technologies All rights reserved. 1 Megabit (128K x 8-Bit) EEPROM 28C011T Important Notice: 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 11.10.03 REV 10 All data sheets are subject to change without notice 18 ©2003 Maxwell Technologies All rights reserved. 28C011T 1 Megabit (128K x 8-Bit) EEPROM Product Ordering Options Model Number 28C011T XX F X -XX Option Details Feature 12 = 120 ns 15 = 150 ns 20 = 200 ns Screening Flow Monolithic S = Maxwell Class S B = Maxwell Class B I = Industrial (testing @ -55°C, +25°C, +125°C) E = Engineering (testing @ +25°C) Package F = Flat Pack Radiation Feature RP = RAD-PAK® package RT = No Radiation Guarentee CLass E and I Only RT1 = Guaranteed to 10 krad at die level RT2 = Guaranteed to 25 krad at die level RT4 = Guaranteed to 40 krad at Base Product Nomenclature 1 Megabit (128k x 8-bit) EEPROM 11.10.03 REV 10 All data sheets are subject to change without notice Memory Access Time 19 ©2003 Maxwell Technologies All rights reserved.