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Full text of “IC Datasheet: 27C EPROM Data Sheet” . several design innovations described in the M27C datasheet to improve programming effi- ciency. 27C Kilobit (64k X 8 Bit) CMOS EPROM. n Fast access time Speed options as fast ns n Low power consumption 20 µA typical CMOS standby current n. datasheet to improve programming efficiency and to provide adequate margin for reliability. Before starting the programming the internal MARGIN MODE circuit.

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The purpose of the bulk capacitor is to overcome the voltage drop caused by the inductive effects of PCB traces. Vcc must 27c521 applied simultaneously with or before Vpp and removed simultaneously or after Vpr. However, STMicroelectronics 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 M27C should be placed within 2. AC Measurement Conditions 10 Figure 7. Exposure to Ab- solute Maximum Rating conditions for extended periods may affect device reliability.

These are stress ratings only, and operation of the dataeheet at these, or any other conditions out- side those indicated in the Operating sections of this specification, is not implied. Ordering Information Scheme Example: Specifications mentioned in this publication are subject to change without notice. Drawing is not to scaie Table To activate the ES mode, the programming equipment must force Testing Input Output Waveform 10 Figure 8. Speed obtained with 27v512 Speed AC measurement conditions.


Package Mechanical Data 17 Figure For a list of available options speed, package, device, please contact your nearest ST Sales Of- etc. No license is granted 27c521 implication or othenwise under any patent or patent rights of STMicroelectronics. High Speed, see AC Characteristics section for further information.

Full text of ” IC Datasheet: Adtasheet Outline 17 Table Capacitance 10 Table 7. It should be noted that sunlight and some type of fluorescent lamps have wavelengths in the A range.

27C512 Datasheet PDF

Chip Enable E is the power control and should be used for device selection. Two identifier bytes may then be se- quenced from the device outputs by toggling ad- dress line AO from Vil to Vih. Minimum DC voltage on Input or Output is Program Inhibit Programming of multiple M27Cs in parallel with datasheft data is also easily accomplished.

STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. Then a sequence of 1 00 is program pulses are ap- plied to each byte until a correct verify occurs.

Full text of “IC Datasheet: 27C EPROM Data Sheet”

Output Enable G is the output control and should be used to gate data to the output pins, indepen- dent of device selection. Although only ‘O’s will be programmed, both ‘1 ‘s and ‘O’s can be present in the data word. LCC Connections 5 Figure 5. The verify is accomplished with G at V L.

This mode is intended for use by programming equipment to automatically match the device to be programmed with its corresponding programming algorithm. It is ideally suited for applica- tions 2c512 fast turn-around and pattern experi- mentation are important requirements and is organized as by 8 bits.


The magnitude of the transient current peaks is dependent on the capacitive and inductive loading of the device at the output. DIP Connections 5 Figure 4. Search the history of over billion web pages on the Internet.

27C512 – 27C512 512K EPROM Datasheet

The M27C is in the pro- g. The integrated dose i.

Package Outline 19 Table A new pattern can then be written to the datashete by following the programming procedure. Data is introduced by selectively program- ming ‘O’s into the desired bit locations.

Logic Diagram 4 Table 1. The levels required for the address and data in- puts are TTL. The two line control function allows: Vcc must be applied simultaneously with or before Vpp and removed simultaneously or after Vpp.

27C EPROM Technical Data

Designers should check that the operating conditions in their circuit match the measurement conditions when relying on the quoted parame- ters. Vqc is specified to be 6. Read Mode The M27C has two control functions, both of which must be logically active in order to obtain data at the outputs. The FDIP28W window ceramic frit-seal package has transparent lid which allows the user to ex- pose the chip to ultraviolet light to erase the bit pat- tern.