27C512A
512K (64K x 8) CMOS EPROM
FEATURES
PACKAGE TYPES
TSOP
• High speed performance
OE/VPP
A11
A9
1
2
3
4
5
6
7
28 A10
27 CE
26 D7
25 D6
24 D5
23 D4
22 D3
• CMOS Technology for low power consumption
- 25 mA Active current
A8
A13
A14
VCC
- 30 µA 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
27C512A
A15
A12
8
9
21 VSS
20 D2
19 D1
18 D0
17 A0
16 A1
15 A2
A7 10
A6 11
A5 12
A4 13
A3 14
PLCC
5
29
28
27
26
25
24
23
22
21
A6
A5
A4
A3
A2
A1
A0
NC
O0
A8
A9
- 28-pin SOIC package
6
7
A11
NC
OE/VPP
A10
CE
- 28-pin TSOP package
8
9
- 28-pin VSOP package
10
11
12
13
- Tape and reel
O7
O6
• Data Retention > 200 years
• Available for the following temperature ranges
- Commercial:
- Industrial:
0˚C to +70˚C
DIP/SOIC
-40˚C to +85˚C
-40˚C to +125˚C
- Automotive:
A15
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
A14
A13
A8
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
VSS
2
3
DESCRIPTION
4
5
A9
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.
6
A11
OE/VPP
A10
CE
7
8
9
10
11
12
13
14
O7
O6
O5
O4
O3
VSOP
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.
OE/VPP
A11
A9
A8
A13
A14
22
23
24
25
26
27
A10
CE
O7
O6
O5
O4
O3
VSS
O2
O1
O0
A0
21
20
19
18
17
16
15
14
13
12
11
10
9
28
1
VCC
A15
27C512A
2
3
4
5
6
7
A12
A7
A6
A5
A4
A3
A1
A2
8
1996 Microchip Technology Inc.
DS11173E-page 1
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