27C64 64K 200ns CMOS EPROM – Datasheet

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The M27C64A is a 64Kbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one-time programmable). It is ideally suited for microprocessor systems requiring large programs and is organized as 8,192 by 8 bits. The PDIP28W has a transparent lid that allows the user to expose the chip to ultraviolet light to erase the bit pattern. A new pattern can then be written to the device by following the programming procedure. For applications where the content is programmed only on time and erasure is not required, the M27C64A is offered in the PLCC32 package.

27C64 Pinout

27C64 Pin Configuration

Pin NumberPin NoDescription
1VPPProgramming Supply
2A12 Address Input
3A7 Address Input
4A6 Address Input
5A5 Address Input
6A4 Address Input
7A3 Address Input
8A2 Address Input
9A1 Address Input
10A0 Address Input
11Q0 Data Output
12Q1 Data Output
13Q2 Data Output
14Vss Ground
15Q3 Data Output
16Q4 Data Output
17Q5 Data Output
18Q6 Data Output
19Q7 Data Output
20E Chip Enable
21A10 Address Input
22G/Vpp Output Enable/Program Supply
23A11 Address Input
24A9 Address Input
25A8 Address Input
26NCNo Connection
27P’Programming Pin
28Vcc Positive Power Supply

27C64 Key Features

  • 5V ± 10% Supply Voltage in reading Operation
  • Access Time: 100ns
  • Low Power “CMOS” Consumption:
    • Active Current 30mA
    • Standby Current 100µA
  • Programming Voltage: 12.5V ± 0.25V
  • High Speed Programming
    • (less than 1 minute)
  • Electronics Signature
    • Manufacturer Code: 9Bh
    • Device Code: 08h

You can download this datasheet for 27C64 64K 200ns CMOS EPROM – Datasheet from the link given below: