ATMEL AT27C020-70TC, AT27C020-70PI, AT27C020-70PC, AT27C020-70JI, AT27C020-70JC Datasheet

Features

• Fast Read Access Time - 55 ns

• Low Power CMOS Operation

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

• JEDEC Standard Packages

– 32-Lead 600-mil PDIP
– 32-Lead PLCC
– 32-Lead TSOP

• 5V ± 10% Supply

• High-Reliability CMOS Technology

– 2,000V ESD Protection
– 200 mA Latchup Immunity

™

• Rapid

• CMOS and TTL Compatible Inputs and Outputs

• Integrated Product Identification Code

• Commercial and Industrial Temperature Ranges

Programming Algorithm - 100 µs/byte (typical)

AT27C020

2-Megabit
(256K x 8)
OTP EPROM

Description

The AT27C020 is a low-power, high performance 2,097,152-bit one-time programma­ble read only memory (OTP EPROM) organized as 256K by 8 bits. It requires only
one 5V power su pply in normal re ad mode o peration. Any by te can b e acces sed in
less than 55 ns, elimi nating th e need for speed redu cing WA IT states on high perfo r­mance microprocessor systems.

In read mode, the AT27C020 typ ical ly con su mes 8 mA . Stan dby mode supply current

µ

is typically less than 10

Pin Configurations

Pin Name Function

A0 - A17 Addresses
O0 - O7 Outputs
CE
OE
PGM

VPP

A16
A15
A12

A7
A6
A5
A4
A3
A2
A1

A0
O0
O1
O2

GND

Chip Enable
Output Enable
Program Strobe

PDIP Top View

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

A.

PLCC Top View

A12

A15

A16

VPP

VCC

PGM

A17

432

1

323130

29

A14

28

A13

27

A8

26

A9

25

A11

24

OE

23

A10

22

CE

21

07

02

030405

GND

06

O0

5

A7

6

A6

7

A5

8

A4

9

A3

10

A2

11

A1

12

A0

13

14151617181920

01

TSOP Top Vi ew

Type 1

32

VCC

31

PGM

30

A17

29

A14

28

A13

27

A8

26

A9

25

A11

24

OE

23

A10

22

CE

21

07

20

06

19

05

18

04
03

17

A11

A13
A14
A17

PGM

VCC

VPP

A16
A15
A12

1
2

A9

3

A8

4
5
6
7
8
9
10
11
12
13

A7

14

A6

15

A5

16

A4

OE

32

A10

31

CE

30

07

29

06

28

05

27

04

26

03

25

GND

24

02

23

01

22

O0

21

A0

20

A1

19

A2

18

A3

17

AT27C020

Rev. 0570C-B–12/97

1

The AT27C020 is available in a choice of industry standard
JEDEC-approved one -time program mable (OTP) plasti c
PDIP, PLCC, and TSOP packages. All devices feature two­line control (CE
vent bus contention.

With 256K byte storage capability, the AT27C020 allows
firmware to be stored reliably and to be accessed by the
system without the delays of mass storage media.

Atmel’s 27C020 have additional features to ensure high
quality and efficient production use. The Rapid
ming Algorithm reduces the time required to program the
part and guarantees reliable programming. Programming
time is typically only 100 µs/byte. The Integrated Product
Identification Code electronic ally identi fies the devic e and
manufacturer. This feature is used by industry standard
programmin g equip ment to se lect th e prope r prog rammi ng
algorithms and voltages.

, OE) to give desig ners the f lexib ility to pre-

™

Program-

Block Diagram

System Considerations

Switching between active and standby conditions via the
Chip Enable pin may prod uce tr ans ie nt v olt age excur sions.
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 frequ enc y,
low inherent inductance, ceramic capacitor should be uti­lized for each device. This capacitor shoul d 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

AT27C020

Absolute Maximum Ratings*

AT27C020

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

*NOTICE: Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent

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

damage to the device. This is a stress rating
only and functional operation of the device at

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

(1)

(1)

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 vo lta ge is -0.6V DC which may

VPP Supply Voltage with

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

(1)

undershoot to -2.0V for pulses of less than 20
ns. Maximum output pin voltage is V

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

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

Notes: 1. X can be VIL or V

2. Refer to Programming Characteristics.

3. VH = 12.0 ± 0.5V.

4. Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled
low (V

(4)

IH.

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

IL

IH

V

IL

IL

IH

V

IL

V

IL

IH

XXXXHigh Z

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

A9 = V

(3)

H

A0 = VIH or V
A1 - A17 = V

IL
IL

+

CC

PP

PP

PP

PP

Outputs

OUT

D

IN

D

OUT

High Z

X Identification Code

3

DC and AC Operating Conditions for Read Operation

-55 -70 -90 -12 -15

AT27C020

Operating Temperature
(Case)

V

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

CC

Com. 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C
Ind. -40°C - 85C -40°C - 85C -40°C - 85C -40°C - 85C -40°C - 85C

DC and Operating Characteristics for Read Operation

Symbol Parameter Condition Min Max Units

I

LI

I

LO

(2)

I

PP

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

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

Input Load Current VIN = 0V to V
Output Leakage Current V

(1)

V

Read/Standby Current V

PP

(1)

V

Standby Current

CC

= 0V to V

OUT

= V

PP

CC

I

(CMOS), CE = VCC ± 0.3V 100 µA

SB1

I

(TTL), CE = 2.0 to V

SB2

VCC Active Current f = 5 MHz, I

(Com., Ind.) ±1.0 µA

CC

(Com., Ind.) ±5.0 µA

CC

±10 µA

+ 0.5V 1.0 mA

CC

= 0 mA, CE = V

OUT

IL

25 mA
Input Low Voltage -0.6 0.8 V
Input High Voltage 2.0 VCC + 0.5 V
Output Low Voltage I

= 2.1 mA 0.4 V

OL

Output High Voltage IOH = -400 µA2.4V

2. VPP may be connected directly to VCC except during programming. The supply current would then be the sum of I

CC

and IPP.

AC Characteristics for Read Operation

-55 -70 -90 -12 -15

Symbol Parameter

(3)

t
t

t

t

ACC

CE

OE

DF

(2)

(2)(3)

(4)(5)

Address to Output Delay
CE to Output Delay OE = V

OE to Output Delay CE = V
OE or CE High

toOutputFloat,
whichever occurred first

Output Hold

t

OH

fromAddress, CE
or OE,whichever
occurred first

Note: 1. 2, 3, 4, 5. See AC Waveforms for Read Operation diagram.

4

AT27C020

Condition Min Max Min Max Min Max Min Max Min Max

CE=OE

= V

IL

IL

IL

55 70 90 120 150 ns
55 70 90 120 150 ns

20 30 35 35 40 ns

18 20 20 30 40 ns

77000ns

AT27C020

Units

AT27C020

AC Waveforms for Read Operation

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 t

3. OE may be delayed up to t

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.

- tOE after the address is valid without impact on t

ACC

Input Test Waveforms and Measurement Levels

(1)

CE.

.

ACC

Output Test Load

(1)

For -55 devices on ly:

3.0V

AC

DRIVING

LEVELS

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

t

R

1.5V

0.0V

AC
MEASUREMENT
LEVEL

For -70,-90,-12,-15 devices only:

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

t

R

Note: 1. CL = 100 pF including jig

Pin Capacitance

f = 1 MHz, T = 25°C

C

IN

C

OUT

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

(1)

Typ Max Units Conditions

48pFV
812pFV

capacitance except -55
devices where CL = 30 pF.

= 0V

IN

= 0V

OUT

5

Programming Waveforms

(1)

Notes: 1. The Input Timing reference is 0.8V for VIL and 2.0V for VIH.

2. tOE and t

3. When programming the AT27C020, a 0.1 µF capacitor is required across V

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

DFP

DC Programming Characteristics

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

Symbol Parameter Test Conditions

I

LI

V

IL

V

IH

V

OL

V

OH

I

CC2

I

PP2

V

ID

Input Load Current VIN = VIL, V
Input Low Level -0.6 0.8 V
Input High Level 2.0 V
Output Low Voltage IOL = 2.1 mA 0.4 V
Output High Voltage IOH = -400 µA2.4 V
VCC Supply Current (Program and Verify) 40 mA
VPP Supply Current CE = PGM = V
A9 Product Identification Voltage 11.5 12.5 V

IH

and ground to suppress voltage transients.

PP

Limits

±

10

+ 1.0 V

CC

IL

20 mA

UnitsMin Max

µ

A

6

AT27C020

AC Programming Characteristics

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

Symbol Parameter Test Condition

(1)

AT27C020

Limits

UnitsMin Max

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

2. This parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven

3. Program Pulse width tolerance is 100 µs ± 5%.

Address Setup Time

2
CE Setup Time 2
OE Setup Time 2
Data Setup Time 2
Address Hold Time 0
Data Hold Time 2
OE High to Output Float Delay

(2)

Input Rise and Fall Times:

(10% to 90%) 20 ns.

Input Pulse Levels:

0.45V to 2.4V
0 130 ns

Input Timing Reference Level:

VPP Setup Time 2
V

Set up Time 2

CC

PGM Program Pulse Width

(3)

Output Timing Reference Level:

0.8V to 2.0V

0.8V to 2.0V

95 105
Data Valid from OE 150 ns
VPP Pulse Rise Time During

Programming

must be applied simultaneously or before V

CC

— see timing diagram.

and removed simultaneously or after VPP.

PP

50 ns

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

Atmel’s 27C020 Integrated Product Identification Code

Pins

Codes

A0 O7 O6 O5 O4 O3 O2 O1 O0
Manufacturer 000011110 1E
Device Type 110000110 86

Hex Data

7

Rapid Programming Algorithm

A 100 µs PGM pulse width is used to program. The
address is set to the first location. V

is raised to 13.0V. Each address is first programmed

V

PP

with one 100 µs PGM
verification / reprogramming loop is executed for each
address. In the even t a byte fails to pass verifi cation, up to
10 successive 100 µs pulses are applied with a verification
after each pulse. If the byte fails to verify after 10 pulses
have been applied, the part is cons idered failed. After the
byte verifies properly, the next address is selected until all
have been checked. V

5.0V. All bytes are read again and compared with the or igi­nal data to determine if the device passes or fails.

pulse without verification. Then a

is then lowered to 5.0V and VCC to

PP

is raised to 6.5V and

CC

8

AT27C020

Ordering Information

(mA)

t

ACC

(ns)

I

CC

Active Standby

AT27C020

Ordering Code Package Operation Range

55 25 0.1 AT27C020-55JC

AT27C020-55PC
AT27C020-55TC

25 0.1 AT27C020-55JI

AT27C020-55PI
AT27C020-55TI

70 25 0.1 AT27C020-70JC

AT27C020-70PC
AT27C020-70TC

25 0.1 AT27C020-70JI

AT27C020-70PI
AT27C020-70TI

90 25 0.1 AT27C020-90JC

AT27C020-90PC
AT27C020-90TC

25 0.1 AT27C020-90JI

AT27C020-90PI
AT27C020-90TI

120 25 0.1 AT27C020-12JC

AT27C020-12PC
AT27C020-12TC

32J
32P6
32T

32J
32P6
32T

32J
32P6
32T

32J
32P6
32T

32J
32P6
32T

32J
32P6
32T

32J
32P6
32T

Commercial

(0°C to 70°C)

Industrial

(-40°C to 85°C)

Commercial

(0°C to 70°C)

Industrial

(-40°C to 85°C)

Commercial

(0°C to 70°C)

Industrial

(-40°C to 85°C)

Commercial

(0°C to 70°C)

25 0.1 AT27C020-12JI

AT27C020-12PI
AT27C020-12TI

150 25 0.1 AT27C020-15JC

AT27C020-15PC
AT27C020-15TC

25 0.1 AT27C020-15JI

AT27C020-15PI
AT27C020-15TI

32J
32P6
32T

32-Lead,Plastic J-Leaded Chip Carrier (PLCC)
32-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)
32-Lead, Plastic Thin Small Outline Package (TSOP)

Package Type

32J
32P6
32T

32J
32P6
32T

32J
32P6
32T

Industrial

(-40°C to 85°C)

Commercial

(0°C to 70°C)

Industrial

(-40°C to 85°C)

9