Rainbow Electronics AT27C2048 - Manual

1
Features
• Fast Read Access Time - 55 ns
• Low Power CMOS Operation
– 100 µA Maximum Standby
– 35 mA Maximum Active at 5 MHz
• JEDEC Standard Packages
– 40-Lead 600 mil PDIP
– 44-Lead PLCC
– 40-Lead VSOP (10 mm x 14 mm)
• Direct Upgrade from 512K-bit and 1M-bit (AT27C516 and AT27C1024) EPROMs
• 5V
±
10% Power Supply
• High Reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latchup Immunity
• Rapid™ Programming Algorithm - 50 µs/word (typical)
• CMOS and TTL Compatible Inputs and Outputs
• Integrated Product Identification Code
• Commercial and Industrial Temperature Ranges
Description
The AT27C2048 is a low-power, high performance 2,097,152-bit one-time program-
mable read only memory (OTP EPROM) organized 128K by 16 bits. It requires a sin-
gle 5V power supply in normal read mode operation. Any word can be accessed in
less than 55 ns, eliminating the need for speed-reducing WAIT states. The by-16
organization makes this part ideal for high-performance 16 and 32 bit microprocessor
systems.
VSOP Top View
Type 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
A9
A10
A11
A12
A13
A14
A15
A16
PGM
VCC
VPP
CE
O15
O14
O13
O12
O11
O10
O9
O8
GND
A8
A7
A6
A5
A4
A3
A2
A1
A0
OE
O0
O1
O2
O3
O4
O5
O6
O7
GND
PDIP Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VPP
CE
O15
O14
O13
O12
O11
O10
O9
O8
GND
O7
O6
O5
O4
O3
O2
O1
O0
OE
VCC
PGM
A16
A15
A14
A13
A12
A11
A10
A9
GND
A8
A7
A6
A5
A4
A3
A2
A1
A0
PLCC Top View
Note: PLCC package pins 1 and 23
are DON’T CONNECT.
7
8
9
10
11
12
13
14
15
16
17
39
38
37
36
35
34
33
32
31
30
29
O12
O11
O10
O9
O8
GND
NC
O7
O6
O5
O4
A13
A12
A11
A10
A9
GND
NC
A8
A7
A6
A5
6 5 4 3 2 1
44 43 42 41 40
18 19 20 21 22 23 24 25 26 27 28
O3 O2 O1 O0 OE DC A0 A1 A2 A3 A4
O13 O14 O15 CE VPP DC VCC PGM A16 A15 A14
2-Megabit
(128K x 16)
OTP EPROM
AT27C2048
Rev. 0632C–10/98
Note: Both GND pins must be connected.
Pin Configurations
Pin Name Function
A0 - A16 Addresses
O0 - O15 Outputs
CE Chip Enable
OE Output Enable
PGM Program Strobe
NC No Connect
DC Don’t Connect
(continued)