AT27C520-90SC

AT27C520-90SC Datasheet

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.

Part	Datasheet
AT27C520-90SC	AT27C520-90SC (pdf)

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• 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 • 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 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. continued Pin Configurations Pin Name Function A8 - A15 Addresses AD0 - AD7 Addresses/Outputs OE /VPP Output Enable/Program Supply Address Latch Enable 512K 64K x 8 Multiplexed Addresses/ Outputs OTP EPROM AT27C520 SOIC Top View OE/VPP 1 A15 2 A13 3 A11 4 A9 5 AD0 6 AD2 7 AD4 8 AD6 9 GND 10 20 VCC 19 ALE 18 A14 17 A12 16 A10 15 A8 14 AD1 13 AD3 12 AD5 11 AD7 TSSOP Top View A10 1 A12 2 A14 3 ALE 4 VCC 5 OE/VPP 6 A15 7 A13 8 A11 9 A9 10 20 A8 19 AD1 18 AD3 17 AD5 16 AD7 15 GND 14 AD6 13 AD4 12 AD2 11 AD0 The AT27C520 is available in 173 mil, 20-pin TSSOP 300 mil and, 20-pin SOIC one-time programmable OTP plastic packages. With 64K byte storage capability, the AT27C520 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media. Atmel's 27C520 has additional features to ensure high quality and efficient production use. The Rapid Programming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 50 µs/byte. The Integrated Product Identification Code electronically identifies the device and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages. System Considerations Switching under active conditions may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a µF high frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the VCC and Ground terminals of the device, as close to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a µF bulk electrolytic capacitor should be utilized, again connected between the VCC and Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array. Block Diagram VCC GND OE/VPP ALE OE, ALE, AND PROGRAM LOGIC OUTPUT BUFFERS LATCHES AD7 - AD0 A15 - A8 Y DECODER Y-GATING X DECODER 8 CELL MATRIX IDENTIFICATION Ordering Information tACC ns 70 ICC mA Active Ordering Code AT27C520-70SC AT27C520-70XC AT27C520-70SI AT27C520-70XI AT27C520-90SC AT27C520-90XC AT27C520-90SI AT27C520-90XI AT27C520 Package 20S 20X 20S 20X 20S 20X 20S 20X Operation Range Commercial 0°C to 70°C Industrial -40°C to 85°C Commercial 0°C to 70°C Industrial -40°C to 85°C Package Type 20-Lead, Wide, Plastic Gull-Wing Small Outline SOIC 20-Lead, Wide, Thin Shrink Small Outline TSSOP Packaging Information 20S, 20-Lead, Wide, Plastic Gull Wing Small Outline Dimensions in Inches and Millimeters PIN 1 0 REF 20X, 20-Lead, Wide, Thin Super Small Outline Package TSSOP Dimensions in Millimeters and Inches PIN 1 ID 0 REF 8 AT27C520 AT27C520 Atmel Headquarters Atmel Operations Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600 Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759 Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686677 FAX 44 1276-686697 Atmel Rousset Zone Industrielle 13106 Rousset Cedex, France TEL 33 4 42 53 60 00 FAX 33 4 42 53 60 01 Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon, Hong Kong TEL 852 27219778 FAX 852 27221369 Japan Atmel Japan K.K. Tonetsu Shinkawa Bldg., 9F 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581 Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732 e-mail Web Site BBS 1- 408 436-4309 Atmel Corporation Atmel Cor poration makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s website. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual proper ty of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others. Printed on recycled paper.

PDF Datasheet Preview

• 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
• 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

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.
continued

Pin Configurations

Pin Name Function

A8 - A15 Addresses

AD0 - AD7 Addresses/Outputs

OE /VPP Output Enable/Program Supply

Address Latch Enable
512K 64K x 8 Multiplexed Addresses/ Outputs OTP EPROM

AT27C520

SOIC Top View

OE/VPP 1 A15 2 A13 3 A11 4 A9 5 AD0 6 AD2 7 AD4 8 AD6 9 GND 10
20 VCC 19 ALE 18 A14 17 A12 16 A10 15 A8 14 AD1 13 AD3 12 AD5 11 AD7

TSSOP Top View

A10 1 A12 2 A14 3 ALE 4 VCC 5 OE/VPP 6 A15 7 A13 8 A11 9

A9 10
20 A8 19 AD1 18 AD3 17 AD5 16 AD7 15 GND 14 AD6 13 AD4 12 AD2 11 AD0

The AT27C520 is available in 173 mil, 20-pin TSSOP 300 mil and, 20-pin SOIC one-time programmable OTP plastic packages.

With 64K byte storage capability, the AT27C520 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media.

Atmel's 27C520 has additional features to ensure high quality and efficient production use. The Rapid Programming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 50 µs/byte. The Integrated Product Identification Code electronically identifies the device and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages.

System Considerations

Switching under active conditions may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a µF high frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the VCC and Ground terminals of the device, as close to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a µF bulk electrolytic capacitor should be utilized, again connected between the VCC and Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array.

Block Diagram

VCC GND

OE/VPP ALE

OE, ALE, AND PROGRAM LOGIC

OUTPUT BUFFERS

LATCHES

AD7 - AD0 A15 - A8

Y DECODER

Y-GATING

X DECODER 8

CELL MATRIX

IDENTIFICATION
Ordering Information
tACC ns 70

ICC mA Active
Ordering Code AT27C520-70SC AT27C520-70XC AT27C520-70SI AT27C520-70XI AT27C520-90SC AT27C520-90XC AT27C520-90SI AT27C520-90XI

AT27C520

Package 20S 20X 20S 20X 20S 20X 20S 20X

Operation Range Commercial 0°C to 70°C Industrial
-40°C to 85°C Commercial 0°C to 70°C Industrial
-40°C to 85°C

Package Type
20-Lead, Wide, Plastic Gull-Wing Small Outline SOIC
20-Lead, Wide, Thin Shrink Small Outline TSSOP

Packaging Information
20S, 20-Lead, Wide, Plastic Gull Wing Small Outline Dimensions in Inches and Millimeters

PIN 1
0 REF
20X, 20-Lead, Wide, Thin Super Small Outline Package TSSOP Dimensions in Millimeters and Inches

PIN 1 ID
0 REF 8

AT27C520

AT27C520

Atmel Headquarters

Atmel Operations

Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600

Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759

Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686677 FAX 44 1276-686697

Atmel Rousset Zone Industrielle 13106 Rousset Cedex, France TEL 33 4 42 53 60 00 FAX 33 4 42 53 60 01

Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon, Hong Kong TEL 852 27219778 FAX 852 27221369

Japan Atmel Japan K.K. Tonetsu Shinkawa Bldg., 9F 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581

Fax-on-Demand North America 1- 800 292-8635

International 1- 408 441-0732
e-mail

Web Site

BBS 1- 408 436-4309

Atmel Corporation Atmel Cor poration makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s website. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual proper ty of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems.

Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others.

Printed on recycled paper.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AT27C520-90SC Datasheet file may be downloaded here without warranties.

Datasheet ID: AT27C520-90SC 518947