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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To activate the ES mode, the programming equipment must force This can be achieved with STMicroelectronics M27C due to several design innovations described datasjeet the M27C datasheet to improve programming effi- ciency and to provide adequate margin for reliabil- ity.

27C Datasheet PDF –

Capacitance 10 Table 7. Logic Diagram 4 Table 1. Some lamps have a filter on their tubes which should be datasheeet before erasure. Program Verify A verify read should be performed on the pro- grammed bits to determine that they were correct ly programmed.

27C512 – 27C512 512K EPROM Datasheet

It is ideally suited for applica- tions where fast turn-around and pattern experi- mentation are important requirements and is organized as by 8 bits. The integrated dose i.

A single power supply is required in theread mode. Vcc must be applied simultaneously with or before Vpp and removed simultaneously or after Vpp.

27C EPROM Datasheet

Ice, has three seg- ments that are of interest to the system designer: Operating Modes 6 Table 3. The parameters in the DC and AC Characteristic tables that follow are de- rived from tests performed under the Measure- ment Conditions summarized in the relevant tables.


Specifications mentioned in this publication are subject to change without notice. Two identifier bytes may then be se- quenced from the device outputs by toggling ad- dress line AO from Vil to Vih.

This publication supersedes and replaces all information previously supplied. Signal Names 4 Figure 3.

27C512 Datasheet

The M27C is in the pro- g. DIP Connections Figure 5. Ordering Information Scheme Example: Speed obtained with High Speed AC measurement conditions. The associated transient voltage peaks can be suppressed by complying with the two line output dagasheet and by properly selected decoupling capacitors.

All other address lines must be held at Vil during Electronic Signa- ture mode. These are stress ratings only, and operation of the device dtasheet these, or any other conditions out- side those indicated in the Operating sections of this specification, is not implied.

Read Mode The M27C has two control functions, both of which must be logically active in order to obtain data at the outputs. Although only ‘O’s will be programmed, both ‘1 ‘s and ‘O’s can be present in the data word. Output Enable G is the datassheet control and should be used to gate data to the output pins, indepen- dent of device selection.

The purpose of the bulk capacitor is to overcome the voltage drop caused by the inductive effects of PCB traces. High Speed, see AC Characteristics section for further information. Package Outline 19 Table The verify is accomplished with G at V L. Vcc must be 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. Vqc is specified 72c512 be 6.

DIP Connections 5 Figure 4. Testing Input Output Waveform 10 Figure 8. Minimum DC voltage on Input or Output is Research shows that constant exposure 72c512 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. 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 27×512 in the array and connected to the READ line from the system control bus.

Then a sequence datasheett 1 00 is program pulses are ap- plied to each byte until a correct verify occurs.