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 magnitude of the transient current peaks is dependent on the capacitive and inductive loading of the device at the output.
Operating Modes 6 Table 3. Research shows that constant exposure to room level fluorescent lighting could erase a typical M27C in about 3 years, while it would take ap- proximately 1 week to cause erasure when ex- posed to direct sunlight. The levels required for the address and data in- puts are TTL.
Package Outline 17 Table It should be noted that sunlight and some type of fluorescent lamps have wavelengths in the A range. 27c52
The two line control function allows: The verify is accomplished with G at V L. DIP Connections 5 Figure 4. DIP Connections Figure 5.
27C512 – 27C512 512K EPROM Datasheet
LCC Connections 5 Figure 5. 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 d evices in the array and connected to the READ line from dztasheet system control bus. All other address lines must be held at Vil during Electronic Signa- ture mode.
Vqc is specified to be 6. Full text of ” IC Datasheet: Minimum DC voltage on Input or Output is It is recommended that a 0.
(Datasheet) 27C pdf – K-Bit CMOS EPROM (1-page)
High Speed, see AC Characteristics section for further information. A single power supply is catasheet in theread mode. Some lamps have a filter on their tubes which should be removed before erasure. Package Outline 19 Table If the M27C is to be exposed to these types of lighting conditions for extended periods of time, it is suggested that UV EPROM opaque labels be put over the M27C window to prevent unintentional erasure.
Drawing is not to scaie. Ratasheet high level E input inhibits the other M27C51 2s from being pro- grammed. Drawing is not to scaie Table Data is introduced by selectively program- ming ‘O’s into the desired bit locations. Speed obtained with High Speed AC measurement conditions. Testing Input Output Waveform 10 Figure 8.
This mode is intended for use by programming equipment to automatically match the device to be programmed with its dahasheet programming datashret. Exposure to Ab- solute Maximum Rating conditions for extended satasheet may affect device reliability. Output Enable G is the output control and should be used to gate data to the output pins, indepen- dent of device selection. Ice, has three seg- ments that are of interest to the system designer: Two identifier bytes may then be se- quenced from the device outputs by toggling ad- dress line AO from Vil to Vih.
The integrated dose datahseet. The purpose of the bulk capacitor is to overcome the voltage drop caused by the inductive effects of PCB traces. The M27C should be placed within 2. The data to be programmed is applied to 8 bits in parallel to the data output pins.
These are stress ratings only, and operation of the device at these, or any other conditions out- side those indicated in the Operating sections of this specification, is not implied. The FDIP28W window datashedt frit-seal package has transparent lid which allows datasheeet user to ex- pose the chip to ultraviolet light to erase the bit pat- tern.
Signal Names 4 Figure 3. Chip Enable E is the power control and should be used for device selection. Program Inhibit Programming of multiple M27Cs in parallel with different data is also easily accomplished.
This publication supersedes and replaces all information previously supplied. The associated transient voltage peaks can be suppressed by complying with the two line output control and by properly selected decoupling capacitors. The bulk capacitor should be located near the power supply connection point. Capacitance 10 Table 7.
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