Rainbow Electronics AT27C1024 User Manual

Features

•

Fast Read Access Time - 45 ns

•

Low-Power CMOS Operation

– 100 µA max. Standby
– 30 mA max. Active at 5 MHz

•

JEDEC Standard Packages

– 40-Lead 600-mil PDIP
– 44-Lead PLCC
– 40-Lead VSOP (10 mm x 14 mm)

•

Direct Upgrade from 512K (AT27C516) EPRO M

±±±±

•

5V

10% Power Supply

•

High-Reliability CMOS Technology

– 2000V ESD Protection
– 200 mA Latchup Immunity

•

Rapid™ Programming Algorithm - 100 µs/word (typical)

•

CMOS and TTL Compatible Inputs and Outputs

•

Integrated Product Identification Code

•

Commercial, Industrial and Automotive Temperature Ranges

AT27C1024

1-Megabit
(64K x 16)
OTP EPROM

Description

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

(continued)

Pin Configurations

Pin Name Function

A0 - A15 Addresses
O0 - O15 Outputs
CE
OE Output En able
PGM
NC No Connect

Note: Both GND pins must be connected.

Chip Enable

Program Strobe

VSOP Top View

Type 1

PDIP Top View

1

VPP

O15
O14
O13
O12
O11
O10

GND

CE

O9
O8

O7
O6
O5
O4
O3
O2
O1
O0
OE

40

2

39

3

38

4

37

5

36

6

35

7

34

8

33

9

32

10

31

11

30

12

29

13

28

14

27

15

26

16

25

17

24

18

23

19

22

20

21

VCC
PGM
NC
A15
A14
A13
A12
A11
A10
A9
GND
A8
A7
A6
A5
A4
A3
A2
A1
A0

AT27C1024

A10
A11
A12
A13
A14
A15

PGM

VCC
VPP

O15
O14
O13
O12
O11
O10

1

A9

2
3
4
5
6
7
8

NC

9
10
11
12

CE

13
14
15
16
17
18
19

O9

20

O8

40

GND

39

A8

38

A7

37

A6

36

A5

35

A4

34

A3

33

A2

32

A1

31

A0

30

OE

29

O0

28

O1

27

A2

26

O3

25

O4

24

O5

23

O6

22

O7

21

GND

PLCC Top View

O13

O14

O15CEVPPNCVCC

65432

7

O12

8

O11

9

O10

10

O9

11

O8

12

GND

13

NC

14

O7

15

O6

16

O5

17

O4

1819202122232425262728

O3O2O1

O0

1

NC

OE

PGMNCA15

4443424140

A0A1A2A3A4

A14

39
38
37
36
35
34
33
32
31
30
29

A13
A12
A11
A10
A9
GND
NC
A8
A7
A6
A5

Rev. 0019J–07/98

1

nization m ake t his p art id eal fo r high -per form ance 16- an d
32-bit microprocessor systems.

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

The AT27C1024 is available in industry standard J EDEC­approved one- time progra mmable (OTP) pl astic PDIP,
PLCC, and VSOP packages. The device features two-line
control (CE
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.

Atmel’s 27C1024 have additional features to ensure high
quality and efficient production use. The Rapid
ming Algori thm reduc es the time require d to prog ram the
part and guarantees reliable programming. Programming
time is typically only 100 µs/word. The Integrated Product
Identification Code electronica lly identifi es the devic e and
manufacturer. This feature is used by industry standard

, OE) to eliminate bus conte ntion in high-sp eed

™

Program-

Block Diagram

programming eq uipme nt to sele ct the prop er program ming
algorithms and voltages.

System Considerations

Switching between active and standby conditions via the
Chip Enable pin may produ ce tra ns ien t vo ltag e ex cu rs i ons .
Unless accommodated by the system design, these tran­sients may exceed data sheet limits, resulting in device
non-conforma nce. At a min imum, a 0. 1 µF high fr equency ,
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 4.7 µF 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.

and Ground terminals of the device, as

CC

and Ground

CC

2

AT27C1024

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 A9 with

Respect to Ground .....................................-2.0V to + 14.0V

AT27C1024

*NOTICE: Stresses beyond those listed under “Abso lute Maxi-

mum 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 condi-

(1)

(1)

tions 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.

VPP Supply Voltage with

Respect to Ground ......................................-2.0V to + 14.0V

(1)

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

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

V

CC

Operating Modes

Mode/Pin CE OE PGM Ai V

Read V

IL

Output Disable X V
Standby V
Rapid Program

(2)

PGM Verify V
PGM Inhibit V

Product Identification

(4)

IH

V

IL

IL

IH

V

IL

V

IL

IH

XX X X

V

IH

V

IL

XX X V

V

IL

(1)

X

Ai X D

XXXHigh Z

V

IL

V

IH

X

Ai V
Ai V

H

or VIL

IH

(3)

A9 = V

A0 = V

A1 - A15 = V

IL

Notes: 1. X can be VIL or VIH.

2. Refer to Progra mming Characteristics.
= 12.0 ± 0.5V.

3. V

H

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 (V

) to select the Manufacturer’s Identification word and high (VIH) to select the Device Code word.

IL

5. Standby V

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

CC

> VPP will cause a slight increase in ISB.

CC

V

PP

(5)

PP

PP

PP

CC

Outputs

OUT

High Z

D

IN

D

OUT

High Z

Identification Code

3

DC and AC Operating Conditions for Read Operation

AT27C1024

-45 -55 -70 -90 -12 -15

°

C - 70°C0

°

C - 85°C-40

Operating
Temp. (Case)

Com. 0°C - 70°C0
Ind. -40°C - 85°C-40
Auto. -40°C - 125°C-40

V

Power Supply 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10%

CC

°

C - 70°C0

°

C - 85°C-40

°

C - 70°C0

°

C - 85°C-40

°

C - 70°C0

°

C - 85°C-40

°

C - 125°C-40

°

C - 70°C

°

C - 85°C

°

C - 125°C

DC and Operating Characteristics for Read Operation

Symbol Parameter Condition Min Max Units

I

LI

Input Load Current VIN = 0V to V

CC

Com., Ind.
Auto.
Com., Ind.

I

LO

(2)

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

Output Leakage Current V

(1))

V

Read/Standby Current VPP = V

PP

(1)

V

Standby Current

CC

VCC Active Current f = 5 MHz, I

= 0V to V

OUT

(CMOS), CE = V

I

SB1

I

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

SB2

CC

OUT

CC

±

0.3V 100 µA

CC

= 0 mA, CE = V

Auto.

IL

Input Low Voltage -0.6 0.8 V
Input High Voltage 2.0 V
Output Low Voltage IOL = 2.1 mA 0.4 V
Output High Voltage I

= -400 µA2.4V

OH

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

2. VPP may be connected directly to VCC, except d uring p r og r amming. The supply current w o ul d th en be the sum of ICC and IPP..

±

1µA

±

5µA

±

5µA

±

10 µA

10 µA

30 mA

+ 0.5 V

CC

AC Characteristics for Read Operation

-45 -55 -70 -90 -12 -15

Symbol Parameter Condition

t
t
t

t

t

ACC

CE

OE

DF

OH

(3)

(2)

(2)(3)

(4)(5)

Address to Output Delay CE = OE = V
CE to Output Delay OE = V
OE to Output Delay CE = V

IL

IL

OE or CE High to Output Float, whichever
occurred first

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

Note: 2, 3, 4, 5. - see AC Waveforms for Read Operation.

4

AT27C1024

Min Max Min Max Min Max Min Max Min Max Min Max

IL

777000 ns

AT27C1024

Units

45 55 70 90 120 150 ns
45 55 70 90 120 150 ns
20 25 25 30 35 50 ns

20 25 25 30 30 40 ns