1996 Microchip Technology Inc. DS11173E-page 1
27C512A

FEATURES

• High speed performance
• CMOS Technology for low power consumption
- 25 mA Active current
- 30

m

A Standby current
• Factory programming available
• Auto-insertion-compatible plastic packages
• Auto ID aids automated programming
• High speed express programming algorithm
• Organized 64K x 8: JEDEC standard pinouts
- 28-pin Dual-in-line package
- 32-pin PLCC Package
- 28-pin SOIC package
- 28-pin TSOP package
- 28-pin VSOP package
- Tape and reel
• Data Retention > 200 years
• Available for the following temperature ranges
- Commercial: 0˚C to +70˚C
- Industrial: -40˚C to +85˚C
- Automotive: -40˚C to +125˚C

DESCRIPTION

The Microchip Technology Inc. 27C512A is a CMOS
512K bit electrically Programmable Read Only Memory
(EPROM). The device is organized into 64K words by
8 bits (64K bytes). Accessing individual bytes from an
address transition or from power-up (chip enable pin
going low) is accomplished in less than 90 ns. This
very high speed device allows the most sophisticated
microprocessors to run at full speed without the need
for WAIT states. 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, VSOP, TSOP or SOIC packaging is
available. Tape or reel packaging is also available for
PLCC or SOIC packages.

PACKAGE TYPES
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
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
VSS


VCC
A14
A13
A8
A9
A11
OE/VPP
A10
CE
O7
O6
O5
O4
O3


A6
A5
A4
A3
A2
A1
A0
NC
O0
A8
A9
A11
NC
OE/VPP
A10
CE
O7
O6
A7 A12 A15 NU Vcc A14 A13
O1 O2
V NU
O3 O4 O5
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
OE/VPP
A11
A9
A8
A13
A14
VCC

A15
A12
A7
A6
A5
A4
A3
A10
CE
D7
D6
D5
D4
D3

VSS
D2
D1
D0
A0
A1
A2
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
A10
CE
21
20
19
VSS
O2
14
13
12
OE/VPP
A11
A9
A8
22
23
24
A15
A12
A7
1
2
3
4
5
25
26
27
28
6
7
A13
A14
VCC
A6
A5
A4
A3
O7
O6
O5
O4
O3
O1
O0

A0
A1
A2
18
17
16
15
11
10
9
8
TSOP
27C512A
PLCC
DIP/SOIC
VSOP
27C512A
27C512A
27C512A

512K (64K x 8) CMOS EPROM

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