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M27C4002-15XN6X Datasheet(PDF) 3 Page - STMicroelectronics |
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M27C4002-15XN6X Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 18 page 3/18 M27C4002 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 qual- ity 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 withpossibleovershoot toVCC +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 Note: Outputs Q15-Q8 are set to '0'. 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 G A9 VPP Q15-Q0 Read VIL VIL X VCC or VSS Data Out Output Disable VIL VIH X VCC or VSS Hi-Z Program VIL Pulse VIH X VPP Data In Verify VIH VIL X VPP Data Out Program Inhibit VIH VIH X VPP Hi-Z Standby VIH XX VCC or VSS Hi-Z Electronic Signature VIL VIL VID VCC Codes Identifier A0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 Hex Data Manufacturer’s Code VIL 00100000 20h Device Code VIH 01000100 44h DEVICE OPERATION The operating modes of the M27C4002 are listed in the Operating Modes table. A single power sup- ply is required in the read mode. All inputs are TTL levels except for VPP and 12V on A9 for Electronic Signature. Read Mode The M27C4002 has two control functions, both of which must be logically active in order to obtain data at the outputs. Chip Enable (E) is the power control and should be used for device selection. Output Enable (G) is the output control and should be used to gate data to the output pins, indepen- dent of device selection. Assuming that the ad- dresses are stable, the address access time (tAVQV) is equal to the delay from E to output (tELQV). Data is available at the output after a delay of tGLQV from the falling edge of G, assuming that E has been low and the addresses have been sta- ble for at least tAVQV-tGLQV. |
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