ATMEL AT27C2048-90JI, AT27C2048-90JC, AT27C2048-70VI, AT27C2048-70VC, AT27C2048-70PI Datasheet

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ATMEL AT27C2048-90JI, AT27C2048-90JC, AT27C2048-70VI, AT27C2048-70VC, AT27C2048-70PI Datasheet

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 TSOP (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

RapidProgramming 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 programmable read only memory (OTP EPROM) organized 128K by 16 bits. It requires a single 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.

(continued)

Pin Configurations

 

PDIP Top View

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin Name

 

 

 

Function

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VPP

1

40

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

39

 

 

 

 

 

 

A0 - A16

 

 

 

 

Addresses

 

 

 

 

 

CE

 

 

 

PGM

 

 

 

 

 

 

 

 

 

 

O15

3

38

 

A16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O14

4

37

 

A15

 

 

O0 - O15

 

 

 

 

Outputs

 

 

 

 

 

O13

5

36

 

A14

 

 

 

 

 

 

 

 

 

 

 

O12

6

35

 

A13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O11

7

34

 

A12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O10

8

33

 

A11

 

 

CE

 

 

 

 

 

Chip Enable

 

 

 

 

O9

9

32

 

A10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O8

10

31

 

A9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

11

30

 

GND

 

 

OE

 

 

 

 

 

Output Enable

 

 

 

O7

12

29

 

A8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O6

13

28

 

A7

 

 

 

 

 

 

 

 

 

Program

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PGM

 

 

 

 

 

 

 

 

 

 

O5

14

27

 

A6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O4

15

26

 

A5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O3

16

25

 

A4

 

 

NC

 

 

 

 

 

No Connect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O2

17

24

 

A3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O1

18

23

 

A2

 

Note:

Both GND pins must be con-

 

 

O0

19

22

 

A1

 

 

 

20

21

 

A0

 

 

 

OE

 

 

 

 

 

 

 

nected.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLCC Top View

 

 

 

TSOP Top View

 

 

 

 

 

O13

O14

O15

 

CE

 

VPP

DC

VCC

 

PGM

A16

A15

A14

 

 

 

 

 

 

 

 

Type 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

5

4

 

3

2

1

44

43

42

41

40

 

 

A9

1

 

 

 

 

 

 

 

 

40

GND

 

 

 

 

 

 

 

A10

2

 

 

 

 

 

 

 

 

39

A8

 

 

O12

7

 

 

 

 

 

 

 

 

 

 

 

 

 

39

A13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A11

3

 

 

 

 

 

 

 

 

38

A7

 

 

O11

8

 

 

 

 

 

 

 

 

 

 

 

 

 

38

A12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A12

4

 

 

 

 

 

 

 

 

37

A6

 

 

O10

9

 

 

 

 

 

 

 

 

 

 

 

 

 

37

A11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A13

5

 

 

 

 

 

 

 

 

36

A5

 

 

O9

10

 

 

 

 

 

 

 

 

 

 

 

 

 

36

A10

A14

6

 

 

 

 

 

 

 

 

35

A4

 

 

O8

11

 

 

 

 

 

 

 

 

 

 

 

 

 

35

A9

A15

7

 

 

 

 

 

 

 

 

34

A3

 

 

GND

12

 

 

 

 

 

 

 

 

 

 

 

 

 

34

GND

A16

8

 

 

 

 

 

 

 

 

33

A2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PGM

9

 

 

 

 

 

 

 

 

32

A1

 

 

NC

13

 

 

 

 

 

 

 

 

 

 

 

 

 

33

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

10

 

 

 

 

 

 

 

 

31

A0

 

 

O7

14

 

 

 

 

 

 

 

 

 

 

 

 

 

32

A8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VPP

11

 

 

 

 

 

 

 

 

30

OE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O6

15

 

 

 

 

 

 

 

 

 

 

 

 

 

31

A7

CE

12

 

 

 

 

 

 

 

 

29

O0

 

 

O5

16

 

 

 

 

 

 

 

 

 

 

 

 

 

30

A6

O15

13

 

 

 

 

 

 

 

 

28

O1

 

 

O4

17

19

20

 

21

22

23

24

25

26

27

29

A5

O14

14

 

 

 

 

 

 

 

 

27

O2

 

 

 

 

18

 

28

 

 

O13

15

 

 

 

 

 

 

 

 

26

O3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O12

16

 

 

 

 

 

 

 

 

25

O4

 

 

 

 

O3

O2

O1

 

O0

 

OE

DC

A0

 

A1

A2

A3

A4

 

 

O11

17

 

 

 

 

 

 

 

 

24

O5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O10

18

 

 

 

 

 

 

 

 

23

O6

Note:

PLCC package pins 1 and 23

O9

19

 

 

 

 

 

 

 

 

22

O7

O8

20

 

 

 

 

 

 

 

 

21

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

are DON’T CONNECT.

AT27C2048

2-Megabit

(128K x 16) OTP EPROM

AT27C2048

0632B-A–06/97

1

Description

In read mode, the AT27C2048 typically consumes 15 mA. Standby mode supply current is typically less than 10 μA.

The AT27C2048 is available in industry standard JEDEC-approved one-time programmable (OTP) plastic PDIP, PLCC, and TSOP packages. The device features two-line control (CE, OE) to eliminate bus contention in high-speed systems.

With high density 128K word storage capability, the AT27C2048 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media.

Atmel’s AT27C2048 has additional features that 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 50 μs/word. 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 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

AT27C2048

 

 

 

Block Diagram

Absolute Maximum Ratings*

Temperature Under Bias

......................-55°C to +125°C

Storage Temperature............................

-65°C to +150°C

Voltage on Any Pin with

-2.0V to +7.0V(1)

Respect to Ground ...............................

Voltage on A9 with

- 2.0V to +14.0V(1)

Respect to Ground ............................

VPP Supply Voltage with

- 2.0V to +14.0V(1)

Respect to Ground .............................

 

 

AT27C2048

*NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Note: Maximum voltage is -0.6V dc which may undershoot to - 2.0V for pulses of less than 20 ns. Maximum output pin voltage is VCC + 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

IL

 

V

 

 

X(1)

 

Ai

 

 

X(1)

D

OUT

 

 

 

 

 

IL

 

 

 

 

 

 

 

 

 

 

 

Output Disable

 

X

VIH

 

 

X

 

 

X

 

 

X

High Z

Standby

V

 

 

 

X

 

 

X

 

 

X

 

 

X(5)

High Z

 

 

IH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rapid Program(2)

 

V

IL

V

IH

 

 

V

 

Ai

 

 

V

PP

D

IN

 

 

 

 

 

 

 

IL

 

 

 

 

 

 

 

PGM Verify

 

VIL

 

VIL

 

 

VIH

 

Ai

 

 

VPP

DOUT

PGM Inhibit

VIH

 

X

 

 

X

 

 

X

 

 

VPP

High Z

 

 

 

 

 

 

 

 

 

 

 

 

A9 = V

(3)

 

 

 

 

 

Product Identification(4)

 

V

 

 

 

V

 

 

X

 

A0 = V

 

H

 

V

 

Identification Code

 

IL

 

 

 

 

IH

or V

IL

CC

 

 

 

 

 

IL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A1 - A16 = VIL

 

 

 

 

Notes: 1. X can be VIL or VIH.

2.Refer to the Programming characteristics.

3.VH = 12.0 ± 0.5V.

4.Two identifier words 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 word and high (VIH) to select the Device Code word.

5.Standby VCC current (ISB) is specified with VPP = VCC. VCC > VPP will cause a slight increase in ISB.

3

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