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27256 EPROM DATASHEET PDF

Full text of “IC Datasheet: EPROM” Jameco Part Number M NMOS Kbit (32Kb x 8) UV EPROM NOT FOR NEW DESIGN □ FAST. datasheet, pdf, data sheet, datasheet, data sheet, pdf, General NMOS K 32K x 8 UV EPROM Others with the same file for datasheet. (EPROM). The device is organized as 32K words by 8 bits (32K bytes). Accessing individual bytes from an address transition or from power-up (chip enable pin.

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perom For the STMi- croelectronics M, these two identifier bytes are given below. It is recommended that a 1 j. Some lamps have a filter on their tubes which should be re- moved before erasure.

Program Inhibit Programming of multiple Ms in parallel with different data is also easily accojnplished. All other address lines must be held at Vil during Electronic Signature mode. The two line control function allows: Full text of ” IC Datasheet: The magnitude of the transient current peaks is dependent on the capacitive and inductive loading of the device at the output.

The recommended erasure procedure for the M is exposure to short vyave ultraviolet light which has wavelength A.

27256 – 27256 256K EPROM Datasheet

The only way to change a “0” to a “1 ” is by ultraviolet light erasure. Output Enable G is the output control and should be used to gate data to the output pins, rprom pendent of device selection. Up to 25 one-millisecond pulses per byte are provided for before the over program pulse is applied.

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Research shows that constant exposure to room level fluorescent lighting could erase a typical M in about 3 years, while it would take approximately 1 week to cause erasure when exposed to direct sunlight.

Except for the rating “Operating Temperature Range”, stresses above those listed in the Table “Absolute Maximum Sprom may cause permanent damage to the device. Vcc must be applied simultaneously with or before Vpp and removed simultaneously or after Vpp. Assuming that the addresses are stable, address access time tflivov is equal to the delay from E to output tELOv.

When in the standby mode, the outputs are in a high impedance state, independent of the G input. The M should be placed within 2. This publication supersedes and replaces all information previously supplied. The data to be pro- grammed is applied 8 bits in parallel to the data output pins.

Datasneet purpose of the bulk capacitor is to overcome the voltage drop caused by the inductive effects of RGB traces. Chip Enable E is the power control and should be used for device selection.

Datasheet(PDF) – Intel Corporation

For further information on any datasheett of this device, please contact STMicroelectronics Sales Office nearest to you. Program Verify A verify should be performed on the programmed bits to determine that they were correctly pro- grammed.

The integrated dose i. Although only “Os” will datasueet programmed, both “1 s” and “Os” can be present in the data word. However, STMicroeiectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use.

The levels required forthe address and data inputs are TTL. This ensures that all deselected 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. The supply current, Ice, has three segments that are of interest to the system designer: It should be noted that sunlight and some type of fluorescent lamps have datasheeh in the A range.

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Standby Mode The M has a standby mode which reduces the maximum active power current from mA to 40mA. Search the history of over billion web pages on the Internet.

Programming reliability is also ensured as the incremental program margin of each byte is continually monitored to determine when it has been successfully programmed.

The associated transient voltage peaks can be sup- pressed by complying with the two line output control and by properly selected decoupling ca- pacitors.

A single 5V power supply is required in the read mode. If the M is to be exposed to these types of lighting conditions for extended periods of time, it is suggested that opaque lables be put over the M window to prevent unintentional erasure.

Specifications mentioned in this publication are subject to change without notice. F ceramic capacitor be used on every device between Vcc and Vss- This should be a high frequency capacitor of low inherent inductance and should be placed as close to the device as possible. It is organized as