27C64 64K 200ns CMOS EPROM

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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.

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27C64 Pinout

27C64 Pin Configuration

Pin Number	Pin No	Description
1	VPP	Programming Supply
2	A12	Address Input
3	A7	Address Input
4	A6	Address Input
5	A5	Address Input
6	A4	Address Input
7	A3	Address Input
8	A2	Address Input
9	A1	Address Input
10	A0	Address Input
11	Q0	Data Output
12	Q1	Data Output
13	Q2	Data Output
14	Vss	Ground
15	Q3	Data Output
16	Q4	Data Output
17	Q5	Data Output
18	Q6	Data Output
19	Q7	Data Output
20	E	Chip Enable
21	A10	Address Input
22	G/Vpp	Output Enable/Program Supply
23	A11	Address Input
24	A9	Address Input
25	A8	Address Input
26	NC	No Connection
27	P’	Programming Pin
28	Vcc	Positive Power Supply