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M27V512-200B6TR Folha de dados(PDF) 3 Page - STMicroelectronics |
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M27V512-200B6TR Folha de dados(HTML) 3 Page - STMicroelectronics |
3 / 16 page 3/16 M27V512 Two Line Output Control Because EPROMs are usually used in larger memory arrays, the product features a 2 line con- trol function which accommodates the use of mul- tiple memory connection. The two line control function allows: a. the lowest possible memory power dissipation, b. complete assurance that output bus contention will not occur. For the most efficient use of these two control lines, E should be decoded and used as the prima- ry device selecting function, while G should be made a common connection to all devices in the array and connected to the READ line from the system control bus. This ensures that all deselect- ed memory devices are in their low power standby mode and that the output pins are only active when data is required from a particular memory device. Table 2. Absolute Maximum Ratings (1) Note: 1. Except for the rating ”Operating Temperature Range”, stresses above those listed in the Table ”Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating condi- tions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant qua- lity documents. 2. Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than 20ns. Maximum DC voltage on Output is VCC +0.5V with possible overshoot to VCC +2V for a period less than 20ns. 3. Depends on range. Table 3. Operating Modes Note: X = VIH or VIL,VID = 12V ± 0.5V. Table 4. Electronic Signature Symbol Parameter Value Unit TA Ambient Operating Temperature (3) –40 to 125 °C TBIAS Temperature Under Bias –50 to 125 °C TSTG Storage Temperature –65 to 150 °C VIO (2) Input or Output Voltage (except A9) –2 to 7 V VCC Supply Voltage –2 to 7 V VA9 (2) A9 Voltage –2 to 13.5 V VPP Program Supply Voltage –2 to 14 V Mode E GVPP A9 Q0-Q7 Read VIL VIL X Data Out Output Disable VIL VIH X Hi-Z Program VIL Pulse VPP XData In Program Inhibit VIH VPP X Hi-Z Standby VIH X X Hi-Z Electronic Signature VIL VIL VID Codes Identifier A0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 Hex Data Manufacturer’s Code VIL 001 000 00 20h Device Code VIH 001 111 01 3Dh |
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