AT27C520-70
器件描述：512K 64K x 8 Multiplexed Addresses/ Outputs OTP EPROM
器件厂商：ATMEL [ATMEL Corporation]
文件大小：126.06KB，共10页
Sponsor by e络盟器件资料摘要：
1
512K (64K x 8)
Multiplexed
Addresses/
Outputs
OTP EPROM
AT27C520
Features
• 8-Bit Multiplexed Addresses/Outputs
• Fast Read Access Time - 70 ns
• Low Power CMOS Operation
– 20 mA max. Active at 5 MHz
• 20-Lead TSSOP Package
• 20-Lead SOIC Package
• 28-Lead TSOP Package
• 5V ± 10% Supply
• High Reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latchup Immunity
• Rapid
™
Programming Algorithm - 50 µs/byte (typical)
• CMOS and TTL Compatible Inputs and Outputs
• Integrated Product Identification Code
• Commercial and Industrial Temperature Range
Description
The AT27C520 is a low-power, high performance 524,288 bit one-time programmable
read only memory (OTP EPROM) organized 64K by 8 bits. It incorporates latches for
the 8 lower order address bits to multiplex with the 8 data bits. This minimizes system
chip count, reduces cost, and simplifies the design of multiplexed bus systems. It
requires only one 5V power supply in normal read mode operation. Any byte can be
accessed in less than 70 ns, eliminating the need for speed reducing WAIT states on
high performance microprocessor systems.
Atmel’s scaled CMOS technology provides high speed, lower active power consump-
tion, and significantly faster programming. Power consumption is typically only 8 mA
in Active Mode.
The AT27C520 is available in 173 mil, 20-pin TSSOP; 300 mil, 20-pin SOIC; and 28-
pin TSOP, one-time programmable (OTP) plastic packages.
Rev. 0752C-C–01/98
Pin Configurations
Pin Name Function
A8 - A15 Addresses
AD0 - AD7 Addresses/Outputs
OE /V
PP
Output Enable/V
PP
ALE Address Latch Enable
SOIC Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE/VPP
A15
A13
A11
A9
AD0
AD2
AD4
AD6
GND
VCC
ALE
A14
A12
A10
A8
AD1
AD3
AD5
AD7
(continued)
TSOP Top View
22
23
24
25
26
27
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
A10
NC
NC
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
NC
NC
A9
A8
NC
NC
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
NC
NC
AD0
28
1
TSSOP Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A10
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
A9
A8
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
AD0
512K (64K x 8)
Multiplexed
Addresses/
Outputs
OTP EPROM
AT27C520
Features
• 8-Bit Multiplexed Addresses/Outputs
• Fast Read Access Time - 70 ns
• Low Power CMOS Operation
– 20 mA max. Active at 5 MHz
• 20-Lead TSSOP Package
• 20-Lead SOIC Package
• 28-Lead TSOP Package
• 5V ± 10% Supply
• High Reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latchup Immunity
• Rapid
™
Programming Algorithm - 50 µs/byte (typical)
• CMOS and TTL Compatible Inputs and Outputs
• Integrated Product Identification Code
• Commercial and Industrial Temperature Range
Description
The AT27C520 is a low-power, high performance 524,288 bit one-time programmable
read only memory (OTP EPROM) organized 64K by 8 bits. It incorporates latches for
the 8 lower order address bits to multiplex with the 8 data bits. This minimizes system
chip count, reduces cost, and simplifies the design of multiplexed bus systems. It
requires only one 5V power supply in normal read mode operation. Any byte can be
accessed in less than 70 ns, eliminating the need for speed reducing WAIT states on
high performance microprocessor systems.
Atmel’s scaled CMOS technology provides high speed, lower active power consump-
tion, and significantly faster programming. Power consumption is typically only 8 mA
in Active Mode.
The AT27C520 is available in 173 mil, 20-pin TSSOP; 300 mil, 20-pin SOIC; and 28-
pin TSOP, one-time programmable (OTP) plastic packages.
Rev. 0752C-C–01/98
Pin Configurations
Pin Name Function
A8 - A15 Addresses
AD0 - AD7 Addresses/Outputs
OE /V
PP
Output Enable/V
PP
ALE Address Latch Enable
SOIC Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE/VPP
A15
A13
A11
A9
AD0
AD2
AD4
AD6
GND
VCC
ALE
A14
A12
A10
A8
AD1
AD3
AD5
AD7
(continued)
TSOP Top View
22
23
24
25
26
27
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
A10
NC
NC
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
NC
NC
A9
A8
NC
NC
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
NC
NC
AD0
28
1
TSSOP Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A10
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
A9
A8
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
AD0