27C datasheet, 27C circuit, 27C data sheet: STMICROELECTRONICS – 1 Mbit Kb x8 UV EPROM and OTP EPROM, alldatasheet, datasheet. 27C 1 Mbit kb x8 UV Eprom and OTP Eprom. ± 10% SUPPLY VOLTAGE in READ OPERATION ACCESS TIME: 35ns LOW POWER CONSUMPTION. Date. 1) Reduce operating current change from 40mA to 30mA. 5/28/ 2) Eliminate Interactive Programming Mode. 3) Add 27C pin configuration.
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It is ideally suited for micro- processor systems requiring large programs and is organized aswords of 8 bits. The FDIP32W window ceramic frit-seal package and the LCCC32W leadless chip carrier package have a transparent lids which allow the user to ex- pose the chip to ultraviolet light to erase the bit pat- tern. A new pattern can then be written to the device by following the programming procedure.
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. Input or Output Voltage except A9. A single power sup- ply is required in the read mode.
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All inputs are TTL levels except for V. Read Mode The M27C 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 datassheet pins, indepen. Assuming that the ad- dresses are stable, the address access time t. Data datasheef available at the output after a delay.
E has been low and the addresses have been sta- ble for at least t. When in the standby mode, the outputs are in a high imped- ance state, independent of the G input.
Input Rise and Fall Times. Input and Output Timing Ref. AC Testing Load Circuit. Read Mode DC Characteristics.
Maximum DC voltage on Output is V. Read Mode AC Characteristics. Speed obtained with High Speed AC measurement conditions.
Full text of “IC Datasheet: 27C EPROM Data Sheet”
Address Valid to Output Valid. Chip Enable Low to Output Valid. Output Enable Low to Output Valid. Address Transition to Output Transition. Two Line Output Control Because EPROMs are usually used in larger memory arrays, this product features a 27v1001 line con- trol function which accommodates the use of mul- tiple memory connection. The two line control function allows: 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 datasyeet pins are only active darasheet data is required from a particular memory device. Search field Part name Part description.