Datasheet AT27C1024-45JU Specification

Features

• Fast read access time – 45ns

• Low-power CMOS operation

– 100µA max standby

– 30mA max active at 5MHz

• JEDEC standard packages

– 40-lead PDIP

– 44-lead PLCC

• Direct upgrade from 512K (Atmel

®

AT27C516) EPROM

• 5V ± 10% power supply

• High-reliability CMOS technology

– 2000V ESD protection

– 200mA latchup immunity

• Rapid

programming algorithm – 100µs/word (typical)

• CMOS- and TTL-compatible inputs and outputs

• Integrated product identification code

• Industrial and automotive temperature ranges

• Green (Pb/halide-free) packaging option

1. Description

The Atmel AT27C1024 is a low-power, high-performance 1,048,576-bit, one-time pro­grammable, read-only memory (OTP EPROM) organized as 64K by 16 bits. It requires only
one 5V power supply in normal read mode operation. Any word can be accessed in less
than 45ns, eliminating the need for speed reducing WAIT states. The x16 organization
makes this part ideal for high-performance, 16- and 32-bit microprocessor systems.

1Mb (64K x 16)
One-time
Programmable
Read-only Memory

Atmel AT27C1024

In read mode, the AT27C1024 typically consumes 15mA. Standby mode supply current is
typically less than 10µA.

The AT27C1024 is available in industry-standard, JEDEC-approved, one-time programma­ble (OTP) PDIP and PLCC packages. The device features two-line control (CE, OE) to
eliminate bus contention in high-speed systems.

With high-density, 64K word storage capability, the AT27C1024 allows firmware to be
stored reliably and to be accessed by the system without the delays of mass storage media.

The AT27C1024 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/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.

0019N–EPROM–4/11

2. Pin configurations

44-lead PLCC

Pin name Function

A0 - A15 Addresses

O0 - O15 Outputs

CE Chip enable

OE Output enable

PGM Program strobe

NC No connect

Note: Both GND pins must be

connected.

O12
O11
O10

O9
O8

GND

NC

O7
O6
O5
O4

Top view

O13

O14

O15CEVPPNCVCC

65432

7
8
9
10
11
12
13
14
15
16
17

1819202122232425262728

O3O2O1

O0

OE

PGMNCA15

1

4443424140

A0A1A2A3A4

NC

40-lead PDIP

Top view

A14

39
38
37
36
35
34
33
32
31
30
29

A13
A12
A11
A10
A9
GND
NC
A8
A7
A6
A5

VPP

CE
O15
O14
O13
O12
O11
O10

O9

O8

GND

O7

O6

O5

O4

O3

O2

O1

O0

OE

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

40

VCC

39

PGM

38

NC

37

A15

36

A14

35

A13

34

A12

33

A11

32

A10

31

A9

30

GND

29

A8

28

A7

27

A6

26

A5

25

A4

24

A3

23

A2

22

A1

21

A0

3. 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 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 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 4.7µF 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.

Figure 3-1. Block diagram

2

Atmel AT27C1024

0019N–EPROM–4/11

4. Absolute maximum ratings*

Atmel AT27C1024

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 A9 with

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

VPP supply voltage with

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

Note: 1. Minimum voltage is -0.6V DC, which may undershoot to -2.0V for pulses of less than 20ns. Maximum output pin voltage is

V

+ 0.75V DC, which may overshoot to +7.0V for pulses of less than 20ns.

CC

5. DC and AC characteristics

Table 5-1. Operating modes

Mode/Pin CE OE PGM Ai V

Read V

Output disable X V

Standby V

Rapid program

(2)

PGM verify V

PGM inhibit V

Product identification

Notes: 1. X can be V

(4)

or VIH.

IL

2. Refer to programming characteristics.

= 12.0 ± 0.5V.

3. V

H

4. Two identifier words may be selected. All Ai inputs are held low (V
gled low (V

5. Standby V

) to select the manufacturer’s identification word and high (VIH) to select the device code word.

IL

current (ISB) is specified with VPP = VCC. V

CC

IL

IH

V

IL

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

(1)

(1)

(1)

V

IL

IH

(1)

X

X X X High Z

XX X X

V

IH

V

IL

V

IL

V

IH

XX X V

V

IL

X

not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.

PP

Ai X D

(5)

Ai V

Ai V

(3)

A9 = V

A0 = V

A1 - A15 = V

> VPP will cause a slight increase in ISB.

CC

H

or VIL

IH

IL

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

IL

PP

PP

PP

V

CC

Outputs

OUT

High Z

D

IN

D

OUT

High Z

Identification code

Table 5-2. DC and AC operating conditions for read operation

Operating temp. (case)

power supply 5V ±10% 5V ±10%

V

CC

0019N–EPROM–4/11

Atmel AT27C1024

-45 -70

Ind. -40C - 85C -40C - 85C

Auto.

3

Table 5-3. DC and operating characteristics for read operation

Symbol Parameter Condition Min Max Units

I

LI

I

LO

(2)

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

Notes: 1. V

Input load current VIN = 0V to V

Output leakage current V

(1))

V

read/standby current VPP = V

PP

(1)

V

standby current

CC

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 I

must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP.

CC

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

2. V

PP

I

.

PP.

Table 5-4. AC characteristics for read operation

Ind. ±1µA

CC

Auto. ±5µA

Ind. ±5µA

= 0V to V

OUT

(CMOS), CE = V

I

SB1

(TTL), CE = 2.0 to VCC + 0.5V 1 mA

I

SB2

= -400µA 2.4 V

OH

CC

= 0mA, CE = V

OUT

CC

Auto. ±10 µA

10 µA

± 0.3V 100 µA

CC

IL

30 mA

+ 0.5 V

CC

Atmel AT27C1024

-45 -70

Symbol Parameter Condition

t

t

t

t

t

ACC

CE

OE

DF

OH

(1)

(1)

(1)

(1)

Address to output delay CE = OE = V

CE to output delay OE = V

OE to output delay CE = V

OE or CE high to output float,
whichever occurred first

Output hold from address, CE or OE,
whichever occurred first

Note: 1. See AC waveforms for read operation.

Min Max Min Max

IL

IL

IL

45 70 ns

45 70 ns

20 25 ns

Units

20 25 ns

77 ns

4

Atmel AT27C1024

0019N–EPROM–4/11

Atmel AT27C1024

Figure 5-1. AC waveforms for read operation

(1)

Notes: 1. Timing measurement reference level is 1.5V for -45. Input AC drive levels are VIL = 0.0V and VIH = 3.0V. Timing measure-

ment reference levels for all other speed grades are V
V

= 2.4V.

IH

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

2.

OE may be delayed up to t

3.

- tOE after the address is valid without impact on t

ACC

= 0.8V and VOH = 2.0V. Input AC drive levels are VIL = 0.45V and

OL

.

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.

Table 5-5. Pin capacitance

f = 1MHz, T = 25°C

(1)

Symbol Typ Max Units Conditions

C

IN

C

OUT

410pFV

812pFV

IN

OUT

= 0V

= 0V

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

Figure 5-2. Input test waveforms and measurement levels

For -45 devices only:

tR, tF < 5ns (10% to 90%)

For -70 devices only:

t

, tF < 20 ns (10% to 90%)

R

0019N–EPROM–4/11

5

Figure 5-3. Output test load

Note: 1. C

= 100pF including jig capacitance, except -45 devices, where CL = 30pF.

L

Figure 5-4. Programming waveforms

(1)

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

and t

2. t

OE

3. When programming the Atmel AT27C1024, a 0.1µF capacitor is required across V

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

DFP

and ground to suppress sputious volt-

PP

age transients.

6

Atmel AT27C1024

0019N–EPROM–4/11

Table 5-6. DC programming characteristics

TA = 25 ± 5°C, V

= 6.5 ± 0.25V, VPP = 13.0 ± 0.25V

CC

Atmel AT27C1024

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

Input low level -0.6 0.8 V

Input high level 2.0 V

Output low voltage I

Output high voltage I

VCC supply current (program and verify) 50 mA

VPP supply current CE = PGM = V

A9 product identification voltage 11.5 12.5 V

= VIL, V

IN

OL

OH

IH

= 2.1mA 0.4 V

= -400µA 2.4 V

Table 5-7. AC programming characteristics

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

Symbol Parameter Test conditions

t

AS

t

CES

t

OES

t

DS

t

AH

t

DH

t

DFP

t

VPS

t

VCS

t

PW

t

OE

t

PRT

Notes: 1. V

Address setup time

CE setup time 2 µs

OE setup time 2 µs

Input rise and fall times
(10% to 90%) 20ns

Data setup time 2 µs

Address hold time 0 µs

Data hold time 2 µs

OE high to output float delay

(2)

VPP setup time 2 µs

Input pulse levels

0.45V to 2.4V

Input timing reference level

0.8V to 2.0V

VCC setup time 2 µs

PGM program pulse width

(3)

Output timing reference level

0.8V to 2.0V

Data valid from OE 150 ns

VPP pulse rise time during programming 50 ns

must be applied simultaneously with or before VPP and removed simultaneously with or after VPP.

CC

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 100µsec 5%.

UnitsMin Max

±10 µA

+ 0.1 V

CC

IL

30 mA

Limits

(1)

UnitsMin Max

2µs

0 130 ns

95 105 µs

Table 5-8. The Atmel AT27C1024 integrated product identification code

Codes

Manufacturer 0 0 0 0 0 1 1 1 1 0 001E

Device type 1 0 1 1 1 1 0 0 0 1 00F1

0019N–EPROM–4/11

Pins

Hex

dataA0 O15-O8 O7 O6 O5 O4 O3 O2 O1 O0

7

6. Rapid programming algorithm

A 100µs PGM 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 word fails to pass verification, up to 10
successive 100µs pulses are applied with a verification after each pulse. If the word fails to verify after 10 pulses have been
applied, the part is considered failed. After the word verifies properly, the next address is selected until all have been
checked. VPP is then lowered to 5.0V and VCC to 5.0V. All words are read again and compared with the original data to
determine if the device passes or fails.

Figure 6-1. Rapid programming algorithm

PGM pulse without verification. Then a

8

Atmel AT27C1024

0019N–EPROM–4/11

7. Ordering information

Green Package (Pb/halide-free)

I

(mA)

t

ACC

(ns)

45 30 0.1

70 30 0.1

CC

Atmel ordering code Package Lead finish Operation rangeActive Standby

AT27C1024-45JU
AT27C1024-45PU

AT27C1024-70JU
AT27C1024-70PU

44J

40P6

44J

40P6

Matte tin
Matte tin

Matte tin
Matte tin

Atmel AT27C1024

Industrial

(-40C to 85C)

Industrial

(-40C to 85C)

44J 44-lead, plastic, J-leaded chip carrier (PLCC)

40P6 40-lead, 0.600" wide, plastic, dual inline package (PDIP)

0019N–EPROM–4/11

Package type

9

8. Packaging information

44J – PLCC

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-018, Variation AC

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" (0.102mm) maximum

PIN NO. 1

IDENTIFIER

E1 E

D1

D

1.14(0.045) X 45°

0.318(0.0125)

0.191(0.0075)

NOM

D2/E2

MAX

B1

A2

A1

A

COMMON DIMENSIONS
(Unit of Measure = mm)

SYMBOL

A 4.191 – 4.572

A1 2.286 – 3.048

A2 0.508 – –

D 17.399 – 17.653

D1 16.510 – 16.662 Note 2

E 17.399 – 17.653

E1 16.510 – 16.662 Note 2

D2/E2 14.986 – 16.002

B 0.660 – 0.813

B1 0.330 – 0.533

e 1.270 TYP

MIN

NOTE

10

Package Drawing Contact:
[e-mail]

Atmel AT27C1024

TITLE

44J, 44-lead, Plastic J-leaded chip carrier (PLCC)

DRAWING NO.

44J

0019N–EPROM–4/11

10/04/01

REV.

B

40P6 – PDIP

PIN

1

E1

A1

B

REF

E

B1

C

L

SEATING PLANE

A

Atmel AT27C1024

D

e

COMMON DIMENSIONS

0º ~ 15º

eB

Notes: 1. This package conforms to JEDEC reference MS-011, Variation AC.

2. Dimensions D and E1 do not include mold Flash or Protrusion.
Mold Flash or Protrusion shall not exceed 0.25mm (0.010").

SYMBOL

A – – 4.826

A1 0.381 – –

D 52.070 – 52.578 Note 2

E 15.240 – 15.875

E1 13.462 – 13.970 Note 2

B 0.356 – 0.559

B1 1.041 – 1.651

L 3.048 – 3.556

C 0.203 – 0.381

eB 15.494 – 17.526

e 2.540 TYP

(Unit of Measure = mm)

MIN

NOM

MAX

NOTE

09/28/01

Package Drawing Contact:

[e-mail]

TITLE

40P6, 40-lead (0.600"/15.24mm Wide) Plastic Dual
Inline Package (PDIP)

DRAWING NO.

40P6

REV.

B

0019N–EPROM–4/11

11

9. Revision history

Doc. Rev. Date Comments

0019N 04/2011 Remove VSOP package

0019M 12/2007

Add lead finish to ordering information

12

Atmel AT27C1024

0019N–EPROM–4/11

Atmel Corporation

2325 Orchard Parkway

San Jose, CA 95131

USA

Tel: (+1) [phone]

Fax: (+1) [phone]

www.atmel.com

Atmel Asia Limited

Unit 01-5 & 16, 19F

BEA Tower, Millennium City 5

418 Kwun Tong Road

Kwun Tong, Kowloon

HONG KONG

Tel: [phone]

Atmel Munich GmbH

Business Campus

Parkring 4

D-85748 Garching b. Munich

GERMANY

Tel: [phone]

Fax: [phone]

Atmel Japan

9F, Tonetsu Shinkawa Bldg.

1-24-8 Shinkawa

Chuo-ku, Tokyo 104-0033

JAPAN

Tel: (+81) (3) 3523-3551

Fax: (+81) (3) 3523-7581

Fax: [phone]

© 2011 Atmel Corporation. All rights reserved. / Rev.: 0019N–EPROM–4/11

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