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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Capacitance 10 Table 7.
The magnitude of the transient current peaks is dependent on the capacitive and inductive loading of the device at the output.
For a list of available darasheet speed, package, device, please contact your nearest ST Sales Of- etc. The verify is accomplished with G at V L.
A high level E input inhibits the other M27C51 2s from being pro- grammed. Two identifier bytes may then be se- quenced from the device outputs by toggling ad- dress line AO from Vil to Vih. A single power supply is required in theread mode.
27C512 – 27C512 512K EPROM Datasheet
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 recommended erasure procedure for the M27C51 2 is exposure to short wave ultraviolet light which has wavelength A. Signal Names 4 Figure 3. To activate the ES mode, the datahseet equipment must force The two line control function allows: This mode is intended for use by programming equipment to automatically match the device to be programmed with its corresponding programming algorithm.
STMicroelectronics products are not authorized for use as critical components in 27512 support devices or systems without express written approval of STMicroelectronics.
27C EPROM Technical Data
Vcc must be applied simultaneously with or before Vpp and removed simultaneously or after Vpp. Minimum DC voltage on Input or Output is It is recommended that a 0. Specifications mentioned in this publication are subject to change without notice. DIP Connections Figure 5. Full text of ” IC Datasheet: The M27C should be placed within 2. The purpose of the bulk capacitor is to overcome the voltage drop caused by the inductive effects of PCB traces.
A new pattern can then be written to the device by following the programming procedure. It should be noted that sunlight and some type of fluorescent lamps have wavelengths in the A range.
Research shows that constant exposure to room level fluorescent lighting could erase a typical M27C in about 3 years, while it would take ap- 27c5122 1 week to cause erasure when ex- posed to direct sunlight.
Drawing is not to scaie Table Operating Modes 6 Table 3. The levels required for the address and data in- puts are TTL. Then a sequence of dagasheet 00 is program pulses are ap- plied to each byte until a correct verify occurs.
No license is granted by implication or othenwise under any patent or patent datsaheet of STMicroelectronics. Ice, has three seg- ments that are of interest to the system designer: Output Enable G is the output control and should be used to gate data to the output pins, indepen- dent of device selection.
This publication supersedes and replaces all information previously supplied. LCC Connections 5 Figure 5. All other address lines must be held at Vil during Electronic Signa- ture mode.
Vcc must be applied simultaneously with or before Vpp and removed simultaneously or after Vpr. The bulk capacitor should be located near the power supply adtasheet point. Package Outline 19 Table Package Outline 17 Table