 2004 Microchip Technology Inc. DS11107M-page 1
27C64
FEATURES
• High speed performance
- 120 ns access time available
CMOS Technology for low power consumption
- 20 mA Active current
- 100 µA Standby current
Factory programming available
Auto-insertion-compatible plastic packages
Auto ID aids automated programming
Separate chip enable and output enable controls
High speed “express” programming algorithm
Organized 8K x 8: JEDEC standard pinouts
- 28-pin Dual-in-line package
- 32-pin PLCC Package
- 28-pin SOIC package
- Tape and reel
Available for the following temperature ranges
- Commercial: 0°C to +70°C
- Industrial: -40°C to +85°C
DESCRIPTION
The Microchip Technology Inc. 27C64 is a CMOS 64K
bit (electrically) Programmable Read Only Memory.
The device is organized as 8K words by 8 bits (8K
bytes). Accessing individual bytes from an address
transition or from power-up (chip enable pin going low)
is accomplished in less than 120 ns. CMOS design and
processing enables this part to be used in systems
where reduced power consumption and high reliability
are requirements.
A complete family of packages is offered to provide the
most flexibility in applications. For surface mount appli-
cations, PLCC or SOIC packaging is available. Tape
and reel packaging is also available for PLCC or SOIC
packages.
PACKAGE TYPES
A6
A5
A4
A3
A2
A1
A0
NC
O0
A8
A9
A11
NC
OE
A10
CE
O7
O6
A7 A12 V NU Vcc PGM NC
O1 O2
V

N
U
O3 O4 O5
PP
SS
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
14 15 16 17 18 19 20
4 3 2 1
32 31 30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
V
V
PGM
NC
A8
A9
A11
OE
A10
CE
O7
O6
O5
O4
O3
PP
SS
CC
DIP/SOIC
PLCC
27
C
6
4
27
C
6
4
64K (8K x 8) CMOS EPROM
Obsolete Device