ATMEL AT27C400-90TI, AT27C400-90TC, AT27C400-90RI, AT27C400-70PC, AT27C400-15TI Datasheet

...
0 (0)
ATMEL AT27C400-90TI, AT27C400-90TC, AT27C400-90RI, AT27C400-70PC, AT27C400-15TI Datasheet

Features

Fast Read Access Time - 70 ns

Word-wide or Byte-wide Configurable

4 Megabit Flash and Mask ROM Compatible

Low Power CMOS Operation

100 μA Maximum Standby

50 mA Maximum Active at 5 MHz

Wide Selection of JEDEC Standard Packages

40-Lead 600 mil PDIP

40-Lead SOIC (SOP)

48-Lead TSOP (12 mm x 20 mm)

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 AT27C400 is a low-power, high-performance 4,194,304-bit one-time programmable read only memory (OTP EPROM) organized as either 256K by 16 or 512K by 8 bits. It requires a single 5V power supply in normal read mode operation. Any word can be accessed in less than 70 ns, eliminating the need for speed-reducing WAIT states. The by-16 organization makes this part ideal for high-performance 16and 32bit microprocessor systems.

Pin Configurations

 

Pin Name

Function

 

 

 

 

A0 - A17

Addresses

 

 

 

 

O0 - O15

Outputs

 

 

 

 

O15/A-1

Output/Address

 

 

 

 

 

 

 

 

 

 

 

Byte Mode/

 

BYTE/VPP

 

Program Supply

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chip Enable

 

CE

 

 

 

 

Output Enable

 

OE

 

NC

No Connect

 

 

 

 

 

 

Note: Both GND pins must be connected.

PDIP Top View

 

 

 

 

SOIC (SOP)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A17

1

40

A8

 

 

 

 

 

A17

 

1

40

 

A8

A7

2

39

A9

 

 

 

 

 

A7

 

2

39

 

A9

A6

3

38

A10

 

 

 

 

 

A6

 

3

38

 

A10

A5

4

37

A11

 

 

 

 

 

A5

 

4

37

 

A11

A4

5

36

A12

 

 

 

 

 

A4

 

5

36

 

A12

 

 

 

 

 

 

 

A3

6

35

A13

 

 

 

 

 

A3

 

6

35

 

A13

A2

7

34

A14

 

 

 

 

 

A2

 

7

34

 

A14

A1

8

33

A15

 

 

 

 

 

A1

 

8

33

 

A15

A0

9

32

A16

 

 

 

 

 

A0

 

9

32

 

A16

CE

10

31

BYTE/VPP

 

 

 

 

CE

 

10

31

 

BYTE/VPP

GND

11

30

GND

 

 

 

 

 

GND

 

11

30

 

GND

OE

12

29

015/A-1

 

 

 

 

 

OE

 

12

29

 

015/A-1

O0

13

28

O7

 

 

 

 

 

O0

 

13

28

 

O7

O8

14

27

O14

 

 

 

 

 

O8

 

14

27

 

O14

O1

15

26

O6

 

 

 

 

 

O1

 

15

26

 

O6

O9

16

25

O13

 

 

 

 

 

O9

 

16

25

 

O13

O2

17

24

O5

 

 

 

 

 

O2

 

17

24

 

O5

O10

18

23

O12

 

 

 

 

 

O10

 

18

23

 

O12

O3

19

22

O4

 

 

 

 

 

O3

 

19

22

 

O4

 

 

 

 

 

 

 

 

 

 

 

O11

20

21

VCC

 

 

 

 

 

O11

 

20

21

 

VCC

 

 

 

 

 

TSOP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A15

1

 

 

 

 

 

48

 

A16

 

 

 

 

 

A14

2

 

 

 

 

 

47

 

BYTE/VPP

 

 

 

 

 

A13

3

 

 

 

 

 

46

 

GND

 

 

 

 

 

A12

4

 

 

 

 

 

45

 

015/A-1

 

 

 

 

 

A11

5

 

 

 

 

 

44

 

I/O7

 

 

 

 

 

A10

6

 

 

 

 

 

43

 

O14

 

 

 

 

 

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

 

 

 

 

 

NC

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AT27C400

4-Megabit

(256K x 16 or

512K x 8) OTP EPROM

AT27C400

Preliminary

0844A-A–7/97

1

Description (Continued)

The AT27C400 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 AT27C400 is logically regarded as x16 (word-wide), but read in the bytewide mode, then with A-1 = VIL the lower 8 bits of the 16-bit word are selected and with A-1 = VIH the upper 8 bits of the 16-bit word are selected.

In read mode, the AT27C400 typically consumes 15 mA. Standby mode supply current is typically less than 10 μA.

The AT27C400 is available in industry standard JEDEC-approved one-time programmable (OTP) PDIP, SOIC (SOP), and TSOP packages. The device features two-line control (CE, OE) to eliminate bus contention in high-speed systems.

With high density 256K word or 512K byte storage capability, the AT27C400 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media.

Atmel’s AT27C400 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

AT27C400

 

 

 

AT27C400

Block Diagram

Absolute Maximum Ratings*

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

*NOTICE:

Stresses beyond those listed under “Absolute Maxi-

 

 

mum Ratings” may cause permanent damage to the

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

 

device. This is a stress rating only and functional

 

 

operation of the device at these or any other condi-

Voltage on Any Pin with

 

tions beyond those indicated in the operational sec-

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

 

tions of this specification is not implied. Exposure to

 

 

absolute maximum rating conditions for extended

Voltage on A9 with

 

periods may affect device reliability.

 

 

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

Note: 1.

Minimum voltage is -0.6V dc which undershoot to -

 

VPP Supply Voltage with

 

2.0V for pulses of less than 20 ns. Maximum output

 

pin voltage is VCC + 0.75V dc which may overshoot to

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

 

+7.0V for pulses of less than 20 ns.

 

 

Integrated UV Erase Dose...................7258 W •sec/cm2

 

 

 

 

 

Operating Modes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outputs

 

 

 

Mode/Pin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ai

 

 

 

 

 

 

O0 - O7

O8 - O14

O15/A-1

CE

OE

 

 

BYTE/VPP

Read Word-wide

 

V

 

V

IL

X(1)

 

 

V

IH

D

OUT

D

OUT

D

OUT

 

 

IL

 

 

 

 

 

 

 

 

 

 

Read Byte-wide Upper

 

V

 

V

IL

X(1)

 

 

V

IL

D

OUT

High Z

V

IH

 

 

IL

 

 

 

 

 

 

 

 

 

 

 

 

Read Byte-wide Lower

 

V

 

V

IL

X(1)

 

 

V

IL

D

OUT

High Z

V

IL

 

 

IL

 

 

 

 

 

 

 

 

 

 

 

 

Output Disable

 

X(1)

 

VIH

X(1)

 

 

X

 

 

High Z

 

 

 

Standby

 

V

 

X(1)

X(1)

 

 

X(5)

 

 

High Z

 

 

 

 

 

IH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rapid Program(2)

 

VIL

 

VIH

Ai

 

 

VPP

 

 

DIN

 

 

 

PGM Verify

 

X

 

VIL

Ai

 

 

VPP

 

 

DOUT

 

 

 

PGM Inhibit

 

V

 

V

IH

X(1)

 

 

V

PP

 

 

High Z

 

 

 

 

 

IH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A9 = V

(3)

 

 

 

 

 

 

 

Identificatio

 

 

 

Product Identification(4)

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

VIL

 

VIL

A0 = VIH or VIL

 

VIH

 

 

 

n

 

 

 

 

 

 

 

 

 

 

 

A1 - A17 = VIL

 

 

 

 

 

 

 

Code

 

 

 

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 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

Loading...
+ 7 hidden pages