ATMEL AT27C800-15TI, AT27C800-15TC, AT27C800-12RC, AT27C800-12PI, AT27C800-12PC Datasheet

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Features

Read Access Time - 100 ns

Word-wide or Byte-wide Configurable

8-Megabit Flash and Mask ROM Compatable

Low Power CMOS Operation

-100 μA Maximum Standby

-50 mA Maximum Active at 5 MHz

Wide Selection of JEDEC Standard Packages

-42-Lead 600 mil Cerdip and PDIP

-44-Lead SOIC (SOP)

-48-Lead TSOP (12 mm x 20 mm)

5V ± 10% Power Supply

High Reliability CMOS Technology

-2,000 ESD Protection

-200 mA Latchup Immunity

RapidTM Programming Algorithm - 50 μs/word (typical)

CMOS and TTL Compatible Inputs and Outputs

Integrated Product Identification Code

Commercial and Industrial Temperature Ranges

Description

The AT27C800 is a low-power, high performance 8,388,608-bit UV erasable programmable read only memory (EPROM) organized as either 512K by 16 or 1024K by 8 bits. It requires a single 5V power supply in normal read mode operation. Any word can be accessed in less than 100 ns, eliminating the need for speed-reducing WAIT states. The x16 organization makes this part ideal for high-performance 16and 32-bit

microprocessor systems.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(continued)

Pin Configurations

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin Name

 

Function

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A0 - A18

 

Addresses

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O0 - O15

 

Outputs

 

 

CDIP, PDIP Top View

 

 

 

 

SOIC (SOP)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O15/A-1

 

Output/Address

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte Mode/

 

 

A18

1

42

 

NC

 

 

NC

 

1

44

 

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BYTE/VPP

 

 

A17

2

41

 

A8

 

 

A18

 

2

43

 

NC

 

 

Program Supply

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A7

3

40

 

A9

 

 

A17

 

3

42

 

A8

 

 

 

 

 

 

 

 

 

 

 

 

A6

4

39

 

A10

 

 

 

 

A7

 

4

41

 

A9

CE

 

 

 

Chip Enable

 

 

 

A5

5

38

 

A11

 

 

 

 

A6

 

5

40

 

A10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A4

6

37

 

A12

 

 

 

 

A5

 

6

39

 

A11

OE

 

 

 

Output Enable

 

 

 

 

 

 

 

 

 

 

A3

7

36

 

A13

 

 

 

 

A4

 

7

38

 

A12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A2

8

35

 

A14

 

 

 

 

A3

 

8

37

 

A13

NC

 

 

 

No Connect

 

 

 

A1

9

34

 

A15

 

 

 

 

A2

 

9

36

 

A14

 

 

 

 

 

 

A0

10

33

 

A16

 

 

 

 

A1

 

10

35

 

A15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TSOP

 

 

 

CE

 

 

BYTE/VPP

 

 

 

 

A0

 

11

34

 

A16

 

 

 

 

 

 

GND

12

31

 

GND

 

 

 

 

 

 

 

 

12

33

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CE

 

 

 

 

BYTE/VPP

 

 

 

 

Type 1

 

 

 

OE

 

13

30

 

O15/A-1

 

 

GND

 

13

32

 

GND

 

 

 

 

 

 

 

O0

14

29

 

O7

 

 

 

 

 

 

 

 

14

31

 

O15/A-1

 

 

 

 

 

 

 

 

 

 

 

OE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O8

15

28

 

O14

 

 

 

O0

 

15

30

 

O7

 

 

 

 

 

 

 

 

 

 

 

 

O1

16

27

 

O6

 

 

 

O8

 

16

29

 

O14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A15

1

 

48

 

A16

 

O9

17

26

 

O13

 

 

 

O1

 

17

28

 

O6

 

 

 

 

 

 

 

 

A14

2

 

47

 

BYTE/VPP

 

O2

18

25

 

O5

 

 

 

O9

 

18

27

 

O13

 

 

 

 

 

 

 

 

A13

3

 

46

 

GND

O10

19

24

 

O12

 

 

 

O2

 

19

26

 

O5

 

 

 

 

 

 

 

A12

4

 

45

 

O15/A-1

 

O3

20

23

 

O4

 

 

O10

 

20

25

 

O12

 

 

 

 

 

 

 

 

A11

5

 

44

 

O7

O11

21

22

 

VCC

 

 

 

O3

 

21

24

 

O4

 

 

 

 

 

 

 

A10

6

 

43

 

O14

 

 

 

 

 

 

 

 

 

 

 

O11

 

22

23

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

A9

7

 

42

 

O6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A8

8

 

41

 

O13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

9

 

40

 

O5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

10

 

39

 

O12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

11

 

38

 

O4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

12

 

37

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

13

 

36

 

O11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

14

 

35

 

O3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

15

 

34

 

O10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A18

16

 

33

 

O2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A17

17

 

32

 

O9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A7

18

 

31

 

O1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A6

19

 

30

 

O8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A5

20

 

29

 

O0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A4

21

 

28

 

OE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3

22

 

27

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A2

23

 

26

 

CE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A1

24

 

25

 

A0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AT27C800

8-Megabit

(512K x 16 or

1024K x 8)

UV Erasable

EPROM

AT27C800

Preliminary

1

ATMEL AT27C800-15TI, AT27C800-15TC, AT27C800-12RC, AT27C800-12PI, AT27C800-12PC Datasheet

The AT27C800 can be organized as either word-wide or

byte-wide. The organization is selected via the BYTE/VPP

pin. When BYTE/VPP is asserted high (VIH), the word-wide organization is selected and the O15/A-1 pin is used for O15 data output. When BYTE/VPP is asserted low (VIL),the byte wide organization is selected and the O15/A-1 pin is used for the address pin A-1. When the AT27C800 is logically regarded as x16 (word-wide), but read in the bytewide mode, then with A-1=VIL the lower eight bits of the 16 bit word are selected with A-1 =VIH the upper 8 bits of the 16-bit word are selected.

In read mode, the AT27C800 typically consumes 15 mA. Standby mode supply current is typically less than 10 μA.

The AT27C800 is available in industry standard JEDECapproved one-time programmable (OTP)PDIP, SOIC (SOP), and TSOP as well as UV erasable windowed Cerdip packages. The device features two-line control(CE,OE) to eliminate bus contention in high-speed systems.

With high density 512K word or 1024K-bit storage capability, the AT27C800 allows firmware to be to be stored reliably and to be accessed by the system without the delays of mass storage media.

Atmel’s AT27C800 has additional features that ensure high quality and efficient production use. The RapidTM Programming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 50μs/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 equipment and voltages.

Erasure Characteristics

The entire memory array of the AT27C800 is erased (all outputs read as VOH) after exposure to ultraviolet light at a wavelength of 2,537Å. Complete erasure is assured after a minimum of 20 minutes of exposure using 12,000 μW/cm2 intensity lamps spaced one inch away from the chip. Minimum erase time for lamps at other intensity ratings can be calculated from the minimum integrated erasure dose of 15 W.sec/cm2. To prevent unintentional erasure, an opaque label is recommended to cover the clear window on any UV erasable EPROM that will be subjected to continuous flourescent indoor lighting or sunlight.

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.

Block Diagram

2

AT27C800

 

 

 

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)

with 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 ..........................

Integrated UV Erase Dose...............

7258 W •sec/cm2

 

 

AT27C800

*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: 1. Minimum 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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outputs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode\Pin

 

 

 

 

 

 

 

Ai

 

 

 

 

 

 

O0-O7

O8-O14

O15/A-1

CE

OE

 

 

BYTE/VPP

Read Word-wide

 

V

IL

 

V

X(1)

 

 

V

IH

D

OUT

D

OUT

D

OUT

 

 

 

 

IL

 

 

 

 

 

 

 

 

Read Byte-wide Upper

 

V

IL

 

V

X(1)

 

 

V

D

OUT

High Z

V

IH

 

 

 

 

IL

 

 

 

 

 

IL

 

 

 

 

 

 

Read Byte-wide Lower

 

V

IL

 

V

X(1)

 

 

V

D

OUT

High Z

V

IL

 

 

 

 

IL

 

 

 

 

 

IL

 

 

 

 

 

 

Output Disable

X(1)

 

V

X(1)

 

 

X

 

 

High Z

 

 

 

 

 

 

 

 

 

IH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standby

 

V

 

 

X(1)

X(1)

 

 

X(5)

 

 

High Z

 

 

 

 

 

IH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rapid Program(2)

 

V

IL

 

V

Ai

 

 

V

PP

 

 

D

IN

 

 

 

 

 

 

 

IH

 

 

 

 

 

 

 

 

 

 

 

PGM Verify

 

X

 

VIL

Ai

 

 

VPP

 

 

DOUT

 

 

 

PGM Inhibit

 

V

 

 

 

V

X(1)

 

 

V

PP

 

 

High Z

 

 

 

 

 

IH

 

IH

 

 

 

 

 

 

 

 

 

 

 

 

Product Identification(4)

 

V

IL

 

V

A9 = V

(3)

 

V

IH

 

Identification Code

 

 

 

 

 

IL

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A0 = VIH or VIL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A1 - A18 = VIL

 

 

 

 

 

 

 

 

 

 

 

 

 

Notes: 1. X can be VIL or VIH.

2.Refer to the programming characteristics tables in this data sheet.

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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