ATMEL AT27C020-70TC, AT27C020-70PI, AT27C020-70PC, AT27C020-70JI, AT27C020-70JC Datasheet

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ATMEL AT27C020-70TC, AT27C020-70PI, AT27C020-70PC, AT27C020-70JI, AT27C020-70JC Datasheet

Features

Fast Read Access Time - 55 ns

Low Power CMOS Operation

100 μA max. Standby

25 mA max. Active at 5 MHz

JEDEC Standard Packages

32-Lead 600-mil PDIP

32-Lead PLCC

32-Lead TSOP

5V ± 10% Supply

High-Reliability CMOS Technology

2,000V ESD Protection

200 mA Latchup Immunity

RapidProgramming Algorithm - 100 μs/byte (typical)

CMOS and TTL Compatible Inputs and Outputs

Integrated Product Identification Code

Commercial and Industrial Temperature Ranges

Description

The AT27C020 is a low-power, high performance 2,097,152-bit one-time programmable read only memory (OTP EPROM) organized as 256K by 8 bits. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 55 ns, eliminating the need for speed reducing WAIT states on high performance microprocessor systems.

In read mode, the AT27C020 typically consumes 8 mA. Standby mode supply current is typically less than 10 μA.

Pin Configurations

 

 

 

 

PLCC Top View

 

 

 

 

 

 

 

 

 

 

A12

A15

 

A16

VPP

VCC

 

PGM

A17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin Name

 

Function

 

 

 

 

4

3

2

1

32

31

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A7

5

 

 

 

 

 

 

 

 

 

29

A14

 

 

 

 

A0 - A17

 

Addresses

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A6

6

 

 

 

 

 

 

 

 

 

28

A13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A5

7

 

 

 

 

 

 

 

 

 

27

A8

 

 

 

 

O0 - O7

 

Outputs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A4

8

 

 

 

 

 

 

 

 

 

26

A9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3

9

 

 

 

 

 

 

 

 

 

25

A11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A2

10

 

 

 

 

 

 

 

 

 

24

 

 

 

 

 

 

CE

 

Chip Enable

 

 

 

 

 

 

 

 

 

 

 

 

OE

 

 

 

 

 

 

 

 

 

A1

11

 

 

 

 

 

 

 

 

 

23

A10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A0

12

 

 

 

 

 

 

 

 

 

22

 

 

 

 

 

 

 

OE

 

Output Enable

 

 

 

 

 

 

 

 

 

 

 

 

CE

 

 

 

 

 

 

 

 

 

O0

13

 

 

 

 

 

 

 

 

 

21

07

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

15

16

17

18

19

20

 

 

 

 

 

 

 

PGM

 

Program Strobe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

01

02

 

GND

03

04

05

06

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PDIP Top View

 

 

 

 

TSOP Top View

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type 1

 

 

 

 

 

 

 

 

 

VPP

 

 

1

32

 

VCC

 

A11

1

 

 

 

 

 

 

 

 

 

 

 

32

 

 

 

 

 

 

A16

 

 

2

31

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PGM

 

 

 

 

 

 

 

 

 

 

 

 

 

OE

 

 

 

A15

 

 

3

30

 

A17

 

A9

2

 

 

 

 

 

 

 

 

 

 

 

31

A10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A12

 

 

4

29

 

A14

 

A8

3

 

 

 

 

 

 

 

 

 

 

 

30

CE

 

 

 

A7

 

 

5

28

 

A13

 

A13

4

 

 

 

 

 

 

 

 

 

 

 

29

07

 

 

 

 

A6

 

 

6

27

 

A8

 

A14

5

 

 

 

 

 

 

 

 

 

 

 

28

06

 

 

 

 

A5

 

 

7

26

 

A9

 

A17

6

 

 

 

 

 

 

 

 

 

 

 

27

05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PGM

7

 

 

 

 

 

 

 

 

 

 

 

26

04

 

 

 

 

A4

 

 

8

25

 

A11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

8

 

 

 

 

 

 

 

 

 

 

 

25

03

 

 

 

 

A3

 

 

9

24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OE

 

 

VPP

9

 

 

 

 

 

 

 

 

 

 

 

24

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A2

 

 

10

23

 

A10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A16

10

 

 

 

 

 

 

 

 

 

 

 

23

02

 

 

 

 

A1

 

 

11

22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CE

 

 

A15

11

 

 

 

 

 

 

 

 

 

 

 

22

01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A0

 

 

12

21

 

07

 

 

 

 

A12

12

 

 

 

 

 

 

 

 

 

 

 

21

O0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O0

 

 

13

20

 

06

 

 

 

 

A7

13

 

 

 

 

 

 

 

 

 

 

 

20

A0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O1

 

 

14

19

 

05

 

 

 

 

A6

14

 

 

 

 

 

 

 

 

 

 

 

19

A1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O2

 

15

18

 

04

 

 

 

 

A5

15

 

 

 

 

 

 

 

 

 

 

 

18

A2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

16

17

 

03

 

 

 

 

A4

16

 

 

 

 

 

 

 

 

 

 

 

17

A3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AT27C020

2-Megabit

(256K x 8)

OTP EPROM

AT27C020

Rev. 0570C-B–12/97

1

The AT27C020 is available in a choice of industry standard JEDEC-approved one-time programmable (OTP) plastic PDIP, PLCC, and TSOP packages. All devices feature twoline control (CE, OE) to give designers the flexibility to prevent bus contention.

With 256K byte storage capability, the AT27C020 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media.

Atmel’s 27C020 have additional features to ensure high quality and efficient production use. The RapidProgramming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 100 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.

Block Diagram

System Considerations

Switching between active and standby conditions via the Chip Enable pin 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 0.1 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 4.7 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.

2

AT27C020

 

 

 

 

 

 

AT27C020

 

 

 

Absolute Maximum Ratings*

 

 

 

 

 

 

*NOTICE:

Stresses beyond those listed under “Absolute

Temperature Under Bias.......................-55°C to +125°C

 

 

Maximum Ratings” may cause permanent

Storage Temperature............................-65°C to +150°C

 

damage to the device. This is a stress rating

 

 

only and functional operation of the device at

Voltage on Any Pin with

 

these or any other conditions beyond those

Respect to Ground ............................... -2.0V to +7.0V(1)

 

indicated in the operational sections of this

 

 

specification is not implied. Exposure to abso-

Voltage on A9 with

 

lute maximum rating conditions for extended

 

periods may affect device reliability.

Respect to Ground ............................ -2.0V to +14.0V(1)

 

 

Note: 1.

Minimum voltage is -0.6V DC which may

VPP Supply Voltage with

 

undershoot to -2.0V for pulses of less than 20

 

ns. Maximum output pin voltage is VCC +

Respect to Ground ............................. -2.0V to +14.0V(1)

 

0.75V DC which may overshoot to +7.0V for

 

 

 

 

pulses of less than 20 ns.

 

 

 

 

Operating Modes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode/Pin

CE

 

OE

 

PGM

Ai

 

 

VPP

Outputs

Read

 

V

 

V

IL

 

X(1)

Ai

 

 

X

D

OUT

 

 

IL

 

 

 

 

 

 

 

 

 

 

 

 

Output Disable

 

X

 

VIH

 

X

X

 

 

X

High Z

Standby

 

VIH

 

X

 

X

X

 

 

X

High Z

Rapid Program(2)

 

V

 

V

 

 

 

V

IL

Ai

 

 

V

D

IN

 

 

IL

 

IH

 

 

 

 

 

 

PP

 

 

PGM Verify

 

VIL

 

VIL

 

VIH

Ai

 

 

VPP

DOUT

PGM Inhibit

 

VIH

 

X

 

X

X

 

 

VPP

High Z

 

 

 

 

 

 

 

 

 

 

 

 

A9 = V (3)

 

 

 

 

 

Product Identification(4)

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

V

 

V

IL

 

X

A0 = V

IH

or V

IL

X

Identification Code

 

 

IL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A1 - A17 = VIL

 

 

 

 

Notes: 1. X can be VIL or VIH.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.Refer to Programming Characteristics.

3.VH = 12.0 ± 0.5V.

4.Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled low (VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.

3

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