Rainbow Electronics AT27LV512A User Manual

Features

•

Fast Read Access Time - 70 ns

•

Dual Voltage Range Operation

– Low Voltage Power Supply Range, 3. 0V to 3.6V

or Standard 5V ± 10% Supply Range

•

Compatible with JEDEC Standard AT27C512R

•

Low Power CMOS Operation

– 20 µA max. (less than 1 µA typical) Standby for VCC = 3.6V
– 29 mW max. Active at 5 MHz for VCC = 3.6V

•

JEDEC Standard Packages

– 32-Lead PLCC
– 28-Lead 330-mil SOIC
– 28-Lead TSOP

•

High Reliability CMOS Technology

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

•

Rapid™ Programming Algorithm - 100 µs/b y te (typic al)

•

CMOS and TTL Compatible Inputs and Outputs

– JEDEC Standard for LVTTL

•

Integrated Product Identification Code

•

Commercial and Industrial Temperature Ranges

Description

The AT27LV512A is a high performance, low power, low voltage 524,288-bit one-time
programmable re ad only memory (OTP EP ROM) organized as 64 K by 8 bits. It
requires only one suppl y in t he ran ge of 3. 0V to 3. 6V in norma l rea d mode o perat ion,
making it ideal for fast, portable systems using battery power.

(continued)

512K (64K x 8)
Low Voltage
OTP EPROM

AT27LV512A

Pin Configurations

Pin Name Function

A0 - A15 Addresses
O0 - O7 Outputs
CE

OE

/VPP

NC No Connect

PLCC Top View

A7
432

5

A6

6

A5

7

A4

8

A3

9

A2

10

A1

11

A0

12

NC

13

O0

14151617181920

O1

Note: PLCC Package Pins 1 and 17
are DON’T CONNECT.

Chip Enable
Output Enable/

Program Supply

A12

A15NCVCC

1

323130

O2

O3O4O5

NC

GND

A14

A13

29
28
27
26
25
24
23
22
21

A8
A9
A11
NC
OE/VPP
A10
CE
O7
O6

OE/VPP

A11

A13
A14

VCC

A15
A12

SOIC Top View

A15
A12

GND

A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2

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

28

VCC

27

A14

26

A13

25

A8

24

A9

23

A11

22

OE/VPP

21

A10

20

CE

19

O7

18

O6

17

O5

16

O4

15

O3

TSOP Top View

Type 1

1
2
3

A9

4

A8

5
6
7
8
9
10

A7

11

A6

12

A5

13

A4

14

A3

28

A10

27

CE

26

O7

25

O6

24

O5

23

O4

22

O3

21

GND

20

O2

19

O1

18

O0

17

A0

16

A1

15

A2

Rev. 0607B–10/98

1

Atmel’s innovative desi gn techniques provide fast sp eeds
that rival 5V parts while keepi ng the lo w power con sump­tion of a 3.3V supply. At V

= 3.0V, any byte c an be

CC

accessed in less than 70 ns. With a typical power dissipa­tion of only 18 mW at 5 MHz and V

= 3.3V, the

CC

AT27LV512A consumes less than one fifth the power of a
standard 5V EPROM.

Standby mode supply current is typically less than 1 µA at

3.3V.
The AT27LV512A is availa ble in in dus try stan dard J EDE C-

approved one-time programmable (OTP) plastic PLCC,
SOIC, and TSOP pac kages. All devices featu re two-line
control (CE

, OE) to give designers the flexibility to prevent

bus contention.
The AT27LV512A operating with V

at 3.0V produces TTL

CC

level outputs that are compatible with standard TTL logic
devices operating at V

= 5.0V. The device is also capa-

CC

ble of standard 5-volt operation making it ideally suited for
dual supply range systems or card products that are plug­gable in both 3-volt and 5-volt hosts.

Atmel’s AT27LV512A has additional features to ensure
high quality and eff icie nt produc tion use. Th e Rapid™ Pro­gramming Algorithm reduces the time required to program
the part and guarantees reliable programming. Program-

ming time is typically only 100 µs/byte. The Integrated
Product Identific ation Code electr onically identifi es the
device and manufacturer. This feature is used by i ndustry
standard programming equipment to sele ct the prope r pro­gramming algori thms an d voltag es. The AT 27LV51 2A pro­grams exactly the same way as a standard 5V AT27C512R
and uses the same programming equipment.

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-conforman ce. At a mini mum, a 0.1 µF 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 4.7 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

Block Diagram

2

AT27LV512A

Absolute Maximum Ratings*

Temperature Under Bias.................................. -40°C to +85°C

Storage Temperature..................................... -65°C to +125°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

AT27LV512A

*NOTICE: Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam­age to the de vic e. T his is a stres s r ating o nly an d
functional opera tion of the device at these or any

(1)

(1)

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 reli abi li ty

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 be exceeded if certain precautions are observed (consult application notes) and which may

V

CC

overshoot to +7.0 volts for pulses of less than 20 ns.

Operating Modes

Mode \ Pin CE OE/V

(2)

Read
Output Disable
Standby
Rapid Program
PGM Inhibit

(2)

(2)

(3)

(3)

Product Identification

Notes: 1 . X can be V

(3)(5)

or VIH.

IL

V

IL

V

IL

V

IH

V

IL

V

IH

V

IL

2. Read, output disable, and standby modes require, 3.0V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.

3. Refer to Programming C haracteri stics. Programming modes require V

4. VH = 12.0 ± 0.5V.

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

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

IL

PP

V

IL

V

IH

XXV

V

PP

V

PP

V

IL

Ai V

Ai V

(1)

X

Ai V

XV

A9 = V

(4)

H

A0 = VIH or VIL

A1 - A15 = V

= 6.5V.

CC

IL

CC

CC

V

CC

CC

CC

CC

V

CC

Outputs

(2)

(2)

(2)

(3)

(3)

(3)

D

OUT

High Z
High Z
D

IN

High Z

Identification Code

3

DC and AC Operating Conditions for Read Operation

AT27LV512A

-70 -90 -12 -15

Operating Temperature
(Case)

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

3.0V to 3.6V 3.0V to 3.6V 3.0V to 3.6V 3.0V to 3.6V

Power Supply

V

CC

5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10%

DC and Operating Characteristics for Read Operation

Symbol Parameter Condition Min Max Units
VCC = 3.0V to 3.6V

I

LI

I

LO

(2)

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

V

= 4.5V to 5.5V

CC

I

LI

I

LO

(2)

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

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

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

(1)

V

Read/Standby Current VPP = V

PP

(1)

V

Standby Current

CC

= 0V to V

OUT

CC

I

(CMOS), CE = V

SB1

I

(TTL), CE = 2.0 to VCC + 0.5V 100 µA

SB2

VCC Active Current f = 5 MHz, I

CC

CC

CC

= 0 mA, CE = V

OUT

0.3V 20 µA

±

IL

±1 µA
±5 µA

10 µA

8mA
Input Low Voltage -0.6 0.8 V
Input High Voltage 2.0 VCC + 0.5 V
Output Low Voltage IOL = 2.0 mA 0.4 V
Output High Voltage IOH = -2.0 mA 2.4 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

= 0V to V

OUT

CC

I

(CMOS), CE = VCC ± 0.3V 100 µA

SB1

I

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

SB2

VCC Active Current f = 5 MHz, I

CC

CC

= 0 mA, CE = V

OUT

IL

±1 µA
±5 µA

10 µA

20 mA
Input Low Voltage -0.6 0.8 V
Input High Voltage 2.0 VCC + 0.5 V
Output Low Voltage IOL = 2.1 mA 0.4 V
Output High Voltage IOH = -400 µA2.4V

2. OE/VPP may be con nected di rect ly to VCC, except du ring progr a mming. Th e su pply curre nt w ould th en be th e sum o f ICC and
.

I

PP

4

AT27LV512A