Atmel AT27C040 Datasheet

4Mb (512K x 8) OTP, EPROM

Features

 Fast read access time – 70ns

 Low-power CMOS operation

 100μA max standby
 30mA max active at 5MHz

 JEDEC standard packages

 32-lead PDIP
 32-lead PLCC

 5V 10% supply

 High-reliability CMOS technology

 2000V ESD protection
 200mA latchup immunity

 Rapid programming algorithm – 100μs/byte (typical)

 CMOS- and TTL-compatible inputs and outputs

 Industrial temperature range

 Green (Pb/halide-free) packaging option

Atmel AT27C040

DATASHEET

1. Description

The Atmel® AT27C040 is a low-power, high-performance, 4,194,304-bit, One-Time
Programmable, Read-Only Memory (OTP EPROM) organized as 512K by 8 bits. The
AT27C040 requires only one 5V power supply in normal Read mode operation. Any
byte can be accessed in less than 70ns, eliminating the need for speed reducing wait
states on high-performance microprocessor systems.

The Atmel scaled CMOS technology provides low active power consumption and fast
programming. Power consumption is typically 8mA in active mode and less than 10μA
in standby mode.

The AT27C040 is available in a choice of industry standard, JEDEC-approved, PDIP
and PLCC packages. The device features two-line control (
contention in high-speed systems.

The AT27C040 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 100μs/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.

CE, OE) to eliminate bus

0189J–EPROM–10/2012

2. Pin Configurations and Pinouts

A

Pin
Name

V

PP

A0 - A

O0 - O

Function

Peak to Peak Voltage

Address Inputs

18

Outputs

7

GND Ground

CE Chip Enable

OE Output Enable

V

CC

Device Power Supply

PP

16

15

12

7

6

5

4

3

2

1

0

0

1

2

32-lead PDIP

Top view

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

V
A
A
A
A
A
A
A
OE
A
CE
O
O
O
O
O

CC

18

17

14

13

8

9

11

10

7

6

5

4

3

32-lead PLCC

Top view

A12A15A16VPPVCCA18A

4

3

2

1

5

A

7

6

A

6

7

A

5

8

A

4

9

A

3

10

A

2

11

A

1

12

A

0

13

O

0

14151617181920

2

O1O

323130

3O4O5O6

O

GND

17

29

28

27

26

25

24

23

22

21

A
A
A
A
A
OE
A
CE
O

14

13

8

9

11

10

V
A
A
A

A
A
A
A
A
A

7

A

A
O
O
O

GND

3. Switching Considerations

Switching between active and standby conditions via the Chip Enable (CE) pin may produce transient voltage
excursions. Unless accommodated by the system design, these transients may exceed datasheet limits, resulting in
device nonconformance. At a minimum, a 0.1μF, high-frequency, low inherent inductance, ceramic capacitor should be
utilized for each device. This capacitor should be connected between the V
close to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards with large
EPROM arrays, a 4.7μF bulk electrolytic capacitor should be utilized, again connected between the V
terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to
the array.

4. Block Diagram

V

CC

GND

V

PP

OE

CE

– A

0

Address

Inputs

18

OE, CE, and

Program Logic

Y Decoder

X Decoder

Data Outputs

– O

O

0

7

Output

Buffers

Y-Gating

Cell Matrix

Identification

and ground terminals of the device — as

CC

and ground

CC

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

2

5. Absolute maximum ratings*

Temperature under bias-55°C to +125°C

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

Voltage on any pin with

respect to ground. . . . . . . . . . . . . . . . . .-2.0V to +7.0V

Voltage on A

with

9

respect to ground . . . . . . . . . . . . . . . .-2.0V to +14.0V

V

supply voltage with

PP

respect to ground. . . . . . . . . . . . . . . . .-2.0V to +14.0V

6. Elelectrical Characteristics

6.1 DC and AC characteristics

Table 6-1. Operating modes

Mode/Pin CE OE Ai V

Read V

Output Disable X V

Standby V

Rapid Program

(2)

PGM Verify X V

PGM Inhibit V

Product Identification

(4)

IL

IH

V

IL

IH

V

IL

*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.

PP

V

IL

IH

Ai X

X X High Z

(1)

Outputs

D

OUT

X X X High Z

V

IH

IL

V

IH

V

IL

Ai V

Ai V

X V

A9 = V

(3)

H

A0 = VIH or VIL
A

– A18 = V

1

IL

PP

PP

PP

D

D

OUT

High Z

X Identification Code

IN

Notes: 1. X can be VIL or VIH.

2. Refer to programming characteristics.

3. V

= 12.0 ± 0.5V.

H

4. Two identifier bytes may be selected. All Ai inputs are held low (V
which is toggled low (V
code byte.

), except A9, which is set to VH, and A0,

) to select the manufacturer’s identification byte and high (VIH) to select the device

IL

IL

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

3

6.2 DC and AC Operating Conditions for Read Operation

Atmel AT27C040-70 Atmel AT27C040-90

Industrial Operating Temperature (Case) -40°C to 85°C -40°C to 85°C

VCC Power Supply 5V 10% 5V  10%

6.3 DC and Operating Characteristics for Read Operation

Symbol Parameter Condition Min Max Units

I

I

I

I

I

V

V

V

V

LI

LO

PP1

SB

CC

(2)

IL

IH

OL

OH

Input Load Current VIN = 0V to V

Output Leakage Current V

(1)

V

Read/Standby Current VPP = V

PP

(1)

V

Standby Current

CC1

= 0V to V

OUT

I

(CMOS), CE = VCC  0.3V 100 μA

SB1

I

(TTL), CE = 2.0 to V

SB2

VCC Active Current f = 5MHz, I

Input Low Voltage -0.6 0.8 V

Input High Voltage 2.0 V

Output Low Voltage IOL = 2.1mA 0.4 V

Output High Voltage IOH = -400μA 2.4 V

Notes: 1. VCC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP.

2. V

may be connected directly to VCC, except during programming. The supply current would then be the

PP

sum of I

and IPP.

CC

6.4 AC Characteristics for Read Operation

CC

CC

CC

= 0mA, CE = V

OUT

1 μA

5 μA

10 μA

+ 0.5V 1 mA

CC

IL

30 mA

+ 0.5 V

CC

Atmel AT27C040

-70 -90

Symbol Parameter Condition

t

ACC

t

CE

t

OE

t

DF

t

OH

(1)

(1)

(1)

(1)

Address to Output Delay

CE to Output Delay OE = V

OE to Output Delay CE = V

OE or CE High to Output Float; whichever occurred first. 20 20 ns

Output Hold from Address, CE or OE; whichever occurred
first.

CE = OE
= V

Note: 1. See AC waveforms for read operation.

Min Max Min Max

IL

IL

IL

70 90 ns

70 90 ns

30 35 ns

Units

0 0 ns

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

4

Figure 6-1. AC Waveforms for Read Operation

A

(1)

ddress

Address Valid

CE

t

CE

t

OE

OE

Output

High Z

t

ACC

Output

Valid

t

DF

t

OH

Notes: 1. Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless

otherwise specified.

2.

OE may be delayed up to tCE – tOE after the falling edge of CE without impact on tCE.

3.

OE may be delayed up to t

– tOE after the address is valid without impact on t

ACC

ACC

.

4. This parameter is only sampled, and is not 100% tested.

5. Output float is defined as the point when data is no longer driven.

Figure 6-2. Input Test Waveforms and Measurement Levels

2.40V

AC

Driving

Levels

0.45V

2.00

0.80

AC
Measurement
Level

Figure 6-3. Output Test Load

1.3V

(1N914)

3.3K

OUTPUT

PIN

CL

Table 6-2. Pin Capacitance

(1)

f = 1MHz, T = 25

°C

Symbol Typ Max Units Conditions

C

IN

C

OUT

4 8 pF VIN = 0V

8 12 pF V

OUT

= 0V

Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

5

Figure 6-4. Programming Waveforms

A

(1)

ddress

Data

V

PP

V

CC

CE

OE

V

V

V

V

13.0V

5.0V

6.5V

5.0V

V

V

V

V

Program

IH

IL

t

AS

IH

IL

t

PRT

IH

IL

IH

IL

t

DS

Address Stable

Data In

t

VPS

t

VCS

t

PW

t

DH

t

OES

t

OE

(Verify)

Data Out

Valid

t

DFP

t

AH

Read

Notes: 1. The input timing reference is 0.8V for VIL and 2.0V for VIH.

2. t

3. When programming the AT27C040, a 0.1μF capacitor is required across V

OE

and t

are characteristics of the device, but must be accommodated by the programmer.

DFP

and ground to suppress

PP

spurious voltage transients.

Table 6-3. DC Programming Characteristics

TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V.

Limits

Symbol Parameter Test Conditions

I

LI

V

V

V

V

I

CC2

I

PP2

V

IL

IH

OL

OH

ID

Input Load Current V

= VIL, V

IN

IH

Input Low Level -0.6 0.8 V

Input High Level 2.0 V

Output Low Voltage IOL = 2.1mA 0.4 V

Output High Voltage I

= -400μA 2.4 V

OH

VCC Supply Current (Program And Verify) 40 mA

VPP Supply Current CE = V

IL

A9 Product Identification Voltage 11.5 12.5 V

UnitsMin Max

10 μA

+ 0.7 V

CC

20 mA

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

6

Table 6-4. AC Programming Characteristics

TA = 25  5°C, VCC = 6.5  0.25V, VPP = 13.0  0.25V

Symbol Parameter Test Conditions

Limits

(1)

UnitsMin Max

t

AS

t

OES

t

DS

t

AH

t

DH

t

DFP

t

VPS

t

VCS

t

PW

t

OE

t

PRT

Address Setup Time

2 μs

OE Setup Time 2 μs

Input rise and fall times:

Data Setup Time 2 μs

(10% to 90%) 20ns

Address Hold Time 0 μs

Data Hold Time 2 μs

OE High to Output Float Delay

(2)

Vpp Setup Time 2 μs

Vcc Setup Time 2 μs

CE Program Pulse Width

Data Valid from OE

(3)

(2)

VPP Pulse Rise Time During
Programming

Input pulse levels:

0.45V to 2.4V

Input timing reference level:

0.8V to 2.0V

Output timing reference level:

0.8V to 2.0V

0 130 ns

95 105 μs

150 ns

50 ns

Notes: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously with or after VPP.

2. This parameter is only sampled, and is not 100% tested. Output float is defined as the point where data is no
longer driven. See timing diagram.

3. Program pulse width tolerance is 100μs 5%.

Table 6-5. Atmel AT27C040 Integrated Product Identification Code

Pins

Codes

O

0

O

7

O

6

5

O

O

4

O

3

O

2

O

1

Hex DataA

0

Manufacturer 0 0 0 0 1 1 1 1 0 1E

Device Type 1 0 0 0 0 1 0 1 1 0B

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

7

7. Rapid programming algorithm

A 100μs CE pulse width is used to program. The address is set to the first location. VCC is raised to 6.5V and VPP is
raised to 13.0V. Each address is first programmed with one 100μs
verification/reprogramming loop is executed for each address. In the event a byte fails to pass verification, up to ten
successive 100μs pulses are applied with a verification after each pulse. If the byte fails to verify after ten pulses have
been applied, the part is considered failed. After the byte verifies properly, the next address is selected until all have been
checked. V
determine if the device passes or fails.

Figure 7-1. Rapid Programming Algorithm

is then lowered to 5.0V and VCC to 5.0V. All bytes are read again and compared with the original data to

PP

Program One 100μs Pulse

Increment

Address

CE pulse without verification. Then a

Start

ADDR = First Location

VCC = 6.5V

V

= 13.0V

PP

No

Last

ADDR?

Increment

Address

No

Last

ADDR?

Yes

Yes

ADDR = First Location

X = 0

Pass Fail

Program One 100μs Pulse

Verif y

Byte

= 6.5V

V

CC

= 13.0V

V

PP

Compare

All Bytes

to Original

Data

Pass

Fail

No

Increment

X = 10?

Yes

Device

Failed

Device

Passed

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

8

8. Ordering Information

Green Package Option (Pb/Halide-free)

ICC (mA)

Atmel Ordering Code Package t

AT27C040-70JU 32J

AT27C040-70PU 32P6

AT27C040-90JU 32J

AT27C040-90PU 32P6

(ns)

ACC

70 30 0.1 Matte Tin

90 30 0.1 Matte Tin

Lead Finish Operation RangeActive Standby

Industrial

(-40C to 85C)

Industrial

(-40C to 85C)

Package Type

32J 32-lead, plastic, J-leaded Chip Carrier (PLCC)

32P6 32-lead, 0.600" wide, plastic, Dual Inline (PDIP)

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

9

9. Package information

9.1 32J — 32-lead PLCC

1.14(0.045) X 45°

E1 E

D1

D

D2

PIN NO. 1
IDENTIFIER

1.14(0.045) X 45°

B

e

0.51(0.020)MAX

45° MAX (3X)

Notes: 1. This package conforms to JEDEC reference MS-016, Variation AE.

2. Dimensions D1 and E1 do not include mold protrusion.
Allowable protrusion is .010"(0.254mm) per side. Dimension D1
and E1 include mold mismatch and are measured at the extreme
material condition at the upper or lower parting line.

3. Lead coplanarity is 0.004" (0.10mm) maximum.

0.318(0.0125)

0.191(0.0075)

E2

B1

A2

A1

A

COMMON DIMENSIONS

(Unit of measure = mm)

SYMBOL

A 3.175 – 3.556

A1 1.524 – 2.413

A2 0.381 – –

D 12.319 – 12.573

D1 11.354 – 11.506 Note 2

D2 9.906 – 10.922

E 14.859 – 15.113

E1 13.894 – 14.046 Note 2

E2 12.471 – 13.487

B 0.660 – 0.813

B1 0.330 – 0.533

e 1.270 TYP

MIN

NOM

MAX

NOTE

10/04/01

Package Drawing Contact:
[e-mail]

TITLE

32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC)

Atmel AT27C040 [DATASHEET]

DRAWING NO.

32J

0189J–EPROM–10/2012

REV.

B

10

9.2 32P6 — 32-lead PDIP

j

32

1

D

BASE
PLANE

SEATING
PLANE

A1

.015

GAGE

PLANE

E

ZZ

C

L

eC

Lead Detail

Notes:

1. Dimensions D and E1 do not include mold Flash or
Protrusion. Mold Flash or Protrusion shall not exceed

0.25 mm (0.010").

eA

eB

17

E1

16

e

b2

b

0.10mC

See
Lead Detail

Symbol Min. Nom. Max. Note

A - - 4.826

A1 0.381 - -

b 0.356 - 0.558

c

b2 1.041 - 1.651

c 0.203 - 0.381

D 41.783 - 42.291 Note 1

E 15.240 - 15.875

E1 13.462 - 13.970 Note 1

L 3.048 - 3.556

e 2.54 BSC

eA 15.24 BSC

eB - - 17.78

eC 0.000 - 1.524

COMMON DIMENSIONS

(UNIT OF MEASURE=MM)

A

-C-

L

Package Drawing Contact:
[e-mail]

TITLE

32P6, 32-lead, 0.600”/15.24 mm Wide Plastic Dual

Inline Package (PDIP)

GPC

PLU

DRAWING NO. REV.

32P6 C

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

11/28/11

11

10. Revision History

Doc. Rev. Date Comments

0189J 10/2012

0189I 04/2011

0189H 12/2007 Datasheet revision.

Update 32P6 package outline drawing.

Update template and Atmel logo.

Remove TSOP package.

Add lead finish to ordering information.

Atmel AT27C040 [DATASHEET]

0189J–EPROM–10/2012

12

Atmel Corporation

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San Jose, CA 95110

USA

Tel: (+1) [phone]
Fax: (+1) [phone]

www.atmel.com

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HONG KONG

Tel: [phone]

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Business Campus

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GERMANY

Tel: [phone]
Fax: [phone]

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Tokyo 141-0032

JAPAN

Tel: (+81) (3) 6417-0300
Fax: (+81) (3) 6417-0370

Fax: [phone]

© 2012 Atmel Corporation. All rights reserved. / Rev.: 0189J–EPROM–10/2012

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