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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For a list of available options speed, package, device, please contact your nearest ST Sales Of- etc. Exposure to Ab- solute Maximum Rating conditions for extended periods may affect device reliability. Testing Input Output Waveform 10 Figure 8. Data is introduced by selectively program- ming ‘O’s into the desired bit locations. The associated transient voltage peaks can be suppressed by complying with the two line output control and by properly selected decoupling capacitors.
Logic Diagram 4 Table 1. The M27C should be placed within 2.
Drawing is not to scaie Table Search the history of over billion web pages on the Internet. The bulk capacitor should be located near the power supply connection point. Package Outline 19 Table Full text of ” IC Datasheet: This can be achieved with STMicroelectronics M27C due to several design innovations described in the M27C datasheet to improve programming effi- ciency and to provide adequate margin for reliabil- ity. Specifications mentioned in this publication are subject to change without notice.
Operating Modes 6 Table 3. Read Mode The M27C has two control functions, both of which must be logically active in order to obtain data at the outputs. The M27C is in the pro- g. Ice, has three seg- ments that are of interest to the system designer: High Speed, see AC Characteristics section for further information.
LCC Connections 5 Figure 5. The levels required for the address and data in- puts are TTL. Package Mechanical Data 17 Figure Two identifier bytes may then be se- quenced from the device outputs by toggling ad- dress line AO from Vil to Vih.
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 integrated dose i. A single power supply is required in theread mode.
dtasheet Minimum DC voltage on Input or Output is 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. 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.
STMicroelectronics products are not authorized for use as critical components in life support devices or systems without 2c512 written approval of STMicroelectronics.
Although only ‘O’s will be programmed, both ‘1 ‘s and ‘O’s can be present in the data word. DIP Connections Figure 5. A new pattern can then be written to the device by following the programming procedure.
(PDF) 27C512 Datasheet download
AC Measurement Conditions 10 Figure 7. This publication supersedes and replaces all information previously supplied.
The magnitude of the transient current peaks is dependent on the capacitive and inductive loading of the device at the output. A high level E input inhibits the other M27C51 2s from being pro- grammed.
27C512 – 27C512 512K EPROM Datasheet
Drawing is not to scaie. It is recommended that a 0. Ordering Information Scheme Example: Vcc must be applied simultaneously with or before Vpp and removed simultaneously or after Vpp. Output Enable G is the output control and should be used to gate data to the output pins, indepen- dent of device selection.
DIP Connections 5 Figure 4.
(Datasheet) 27C pdf – K-Bit CMOS EPROM (1-page)
Speed obtained with High Speed AC measurement conditions. 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.
Some lamps have a filter on their tubes which should be removed before erasure. Signal Names 4 Figure 3. datashset
The verify is accomplished with G at V L. This ensures that daasheet deselect- ed 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. All other address lines must be held at Vil during Electronic Signa- ture mode.
Full text of “IC Datasheet: 27C EPROM Data Sheet”
Package Outline 17 Table This mode is intended for use by programming equipment to automatically match the device to be programmed with its corresponding programming algorithm. The data to be programmed is applied to 8 bits in parallel to the data output pins. 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. Program Verify A verify read should be performed datashewt the pro- datzsheet bits to determine that they were correct ly programmed.