AT27C800
Features
• Read Access Time - 100 ns
• Word-wide or Byte-wide Configurable
• 8-Megabit Flash and Mask ROM Compatable
• Low Power CMOS Operation
- 100 µA Maximum Standby
- 50 mA Maximum Active at 5 MHz
• Wide Selection of JEDEC Standard Packages
- 42-Lead 600 mil Cerdip and PDIP
- 44-Lead SOIC (SOP)
- 48-Lead TSOP (12 mm x 20 mm)
• 5V ± 10% Power Supply
• High Reliability CMOS Technology
- 2,000 ESD Protection
8-Megabit
(512K x 16 or
1024K x 8)
UV Erasable
EPROM
- 200 mA Latchup Immunity
• RapidTM Programming Algorithm - 50 µs/word (typical)
• CMOS and TTL Compatible Inputs and Outputs
• Integrated Product Identification Code
• Commercial and Industrial Temperature Ranges
Description
The AT27C800 is a low-power, high performance 8,388,608-bit UV erasable program-
mable read only memory (EPROM) organized as either 512K by 16 or 1024K by 8
bits. It requires a single 5V power supply in normal read mode operation. Any word
can be accessed in less than 100 ns, eliminating the need for speed-reducing WAIT
states. The x16 organization makes this part ideal for high-performance 16- and 32-bit
AT27C800
Preliminary
(continued)
microprocessor systems.
Pin Configurations
Pin Name
A0 - A18
O0 - O15
O15/A-1
Function
Addresses
Outputs
CDIP, PDIP Top View
SOIC (SOP)
Output/Address
A18
A17
A7
1
2
3
4
5
6
7
8
9
42 NC
NC
A18
A17
A7
1
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
NC
Byte Mode/
Program Supply
41 A8
2
NC
BYTE/VPP
40 A9
3
A8
A6
39 A10
38 A11
37 A12
36 A13
35 A14
34 A15
33 A16
32 BYTE/VPP
31 GND
30 O15/A-1
29 O7
4
A9
A5
A6
5
A10
A11
A12
A13
A14
A15
A16
BYTE/VPP
GND
O15/A-1
O7
CE
OE
NC
Chip Enable
Output Enable
No Connect
A4
A5
6
A3
A4
7
A2
A3
8
A1
A2
9
A0 10
CE 11
GND 12
OE 13
O0 14
O8 15
O1 16
O9 17
O2 18
O10 19
O3 20
O11 21
A1
10
11
12
13
14
15
16
17
18
19
20
21
22
A0
CE
GND
OE
O0
TSOP
Type 1
28 O14
27 O6
O8
O14
O6
26 O13
25 O5
O1
A15
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
A16
BYTE/VPP
GND
O15/A-1
O7
O9
O13
O5
A14
A13
A12
A11
A10
A9
2
24 O12
23 O4
O2
3
O10
O3
O12
O4
4
22 VCC
5
O11
VCC
6
O14
O6
7
A8
8
O13
O5
NC
NC
NC
NC
NC
NC
NC
A18
A17
A7
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
O12
O4
VCC
O11
O3
O10
O2
O9
O1
A6
O8
0801A-A
A5
O0
A4
OE
A3
GND
CE
A2
A1
A0
1