ATMEL AT27LV256A-70TI, AT27LV256A-70TC, AT27LV256A-70RI, AT27LV256A-70RC, AT27LV256A-70JI Datasheet

AT27LV256A

256K (32K x 8)
Low Voltage
OTP
CMOS EPROM

Features

0547A

Fast Read Access Ti me - 70 ns

•

Dual Voltage Range Operation

•

Low Voltage Power Supply Ran ge , 3. 0V to 3. 6V
or Standard 5V ± 10% Supply Range

Pin Compatible with JEDEC Standard AT27C256

•

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 Reliabili ty C MOS Te ch nology

•

2,000V ESD Protection
200 mA Latchup Imm un ity

RapidProgramming Algo rith m - 100 µs/byte (typical )

•

CMOS and TTL Compatible Inputs and Outputs

•

JEDEC Standard for LVTTL

Integrated Produc t Ide nti fication Code

•

Commercial and Industrial Temperature Ranges

•

Description

The AT27LV256A is a high performance, low power, low voltage 262,144 bit one-time
programmable read only memory (OTP EPROM) organized as 32K by 8 bits. It re­quires only one supply in the range of 3.0V to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using battery power.

Atmel’s innovative design techniques provide fast speeds that rival 5V parts while
keeping the low power consumption of a 3.3V supply. At V
accessed in less than 70 ns. With a typical power dissipation of only 18 mW at 5 MHz
and V
ard 5V EPROM.

Pin Configurations

Pin Name Function

A0 - A14 Addresses
O0 - O7 Outputs
CE Chip Enable
OE Output Enable
NC No Connect

= 3.3V, the AT27LV256A consumes less than one fifth the power of a stand-

CC

SOIC Top View

PLCC Top View

= 3.0V, any byte can be

CC

(continued)

AT27LV256A

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

TSOP Top View

Type 1

3-75

Description (Continued)

Standby mode supply current is typically less than 1 µA at

3.3V.
The AT27LV256A is available in industry standard

JEDEC-approved one-time programmable (OTP) plastic
PLCC, SOIC and TSOP packages . All devices feature
two-line control (
prevent bus contention.

The AT27LV256A operating with V
TTL level outputs that are compatible with standard TTL
logic devices operating at V
capable 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 AT27LV256A has additional features to ensure
high quality and efficient production use. The Rapid
gramming Algorithm reduces the time required to program
the part and guarantees reliable programming. Program­ming time i s typically only 100 µs/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. The AT27LV256A
programs exactly the same way as a standard 5V
AT27C256R and uses the same programming equipment.

CE, OE) to give designers the flexibility to

at 3.0V produces

CC

= 5.0V. The device is also

CC



Pro-

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 data sheet limits, resulting in de­vice non-conformance. At a minimum, 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
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 4.7 µF bulk electrolytic
capacitor should be utilized, again connected between the

and Ground terminals. This capacitor should be posi-

V

CC

tioned as close as possible to the point where the power
supply is connected to the array.

and Ground terminals of

CC

3-76 AT27LV256A

AT27LV256A

Block Diagram

Absolute Maximum Ra ti ngs *

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

VPP Supply Voltage with

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

*NOTICE: Stresses beyond those listed unde r “Absolu te Maxi-

mum Ratings” may cause permanent da ma ge to th e de vice .
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.

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 V
ceeded if certain precautions are observed (consult
application notes) and which may overshoot to +7.0
volts for pulses of less than 20 ns.

+ 0.75V dc which may be ex-

CC

(1)

(1)

(1)

Operating Modes

Mode \ Pin

(2)

Read
Output Disable
Standby

(2)

Rapid Program
PGM Verify
Optional PGM Verify
PGM Inhibit

Product Identification

Notes: 1. X can be VIL or VIH.

2. Read, output disable, and standby modes require,

3.0V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.

3. Refer to Programming Characteristi cs. Programming
modes require VCC = 6.5V.

(2)

(3)

(3)

(3)

(3)

(3, 5)

CE OE Ai V
V
V
V
V

X

V
V

V

IL
IL

IH

IL

(1)

IL

IH

IL

V

V

X

V

V
V

V

V

IL
IH

(1)

IH
IL
IL
IH

A0 = VIH or VIL

IL

A1 - A14 = V

Ai V

(1)

X

(1)

X

Ai V
Ai V
Ai V

(1)

X

A9 = VH

(4)

IL

4. VH = 12.0 ± 0.5V.

5. Two identi fier bytes may be selected. Al l Ai in puts
are held low (VIL), except A9 which is set to VH and A0
which is togg le d low (V
fication byte and high (V

PP
CC

V

CC

V

CC
PP
PP
CC

V

PP

V

CC

V

CC

(2)

V

CC

(2)

V

CC

(2)

V

CC

(3)

V

CC

(3)

V

CC

(3)

V

CC

(3)

V

CC

(3)

V

CC

) to select the Manufacturer’s Identi-

IL

) to select the Dev ice Code byte.

IH

Outputs

D

OUT

High Z
High Z
D

IN

D

OUT

D

OUT

High Z
Identification

Code

3-77

DC and AC Operating Conditions f or Read Operation

AT27LV256A

-70 -90 -12 -15

Operating Temperature
(Case)

V

Power Supply

CC

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
5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10%

DC and Operating Charact er istics for Read Operation

Symbol Parameter Condition Min Max Units

VCC = 3.0V to 3.6V

I

LI

I

LO

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

VCC = 4.5V to 5.5V

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

(2)

(1)

VPP

Read/Standby Current VPP = V

(1)

VCC

Standby Current

VCC Active Current

= 0V to V

OUT

I

(CMOS), CE = VCC ± 0.3V

SB1

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

I

SB2

f = 5 MHz, I
CE = V

IL

CC

CC

OUT

CC

= 0 mA,

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

±1 µA
±5 µA

10 µA
20 µA

100 µA

8mA

I

LI

I

LO

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

Notes: 1. VCC must be applied simultaneously with or before

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

(2)

(1)

VPP

Read/Standby Current VPP = V

(1)

VCC

Standby Current

VCC Active Current

= 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

f = 5 MHz, I
CE = V

IL

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 µA 2.4 V

, and removed simultane ou sl y wit h or af ter

V

PP

.

V

PP

3-78 AT27LV256A

CC

OUT

±1 µA

CC

±5 µA

10 µA

= 0 mA,

may be connecte d di rectly to VCC, except during

2. V

PP

programming. The supply current woul d then be the su m

and IPP.

of I

CC

20 mA

AT27LV256A

AC Characteristics for Read Operation (V

Symbol Parameter Condition

(3)

t

ACC

t

CE

(2, 3)

t

OE

(4, 5)

t

DF

t

OH

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

Address to Output Delay CE = OE = V

(2)

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

IL
IL

(1)

AC Waveforms for Re ad O peration

= 3.0V to 3.6V and 4.5V to 5.5V)

CC

AT27LV256A

-70 -90 -12 -15

Min Max Min Max Min Max Min Max

IL

70 90 120 150 ns
70 90 120 150 ns
50 50 50 60 ns

40 40 40 50 ns

0 0 0 0 ns

Units

Notes: 1. Timing measurement referenc es are 0. 8V and 2.0V.

Input AC drive levels are 0.45V and 2.4V, unless
otherwise specified.
OE may be delayed up to t

2.
CE without impact on t

of
OE may be delayed up to t

3.

address is valid with ou t impa ct on t

- tOE after the falling edge

CE

.

CE

- tOE after the

ACC

ACC

.

4. This parameter is on ly sampl ed and is not 100% tested.

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

3-79

Input Test Waveform a nd Mea sur ement Level

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

Output Test Load

Note: CL = 100 pF including
jig capaci tance.

Pin Capacitance (f = 1 MHz, T = 25°C)

(1)

Typ Max Units Conditions

C

IN

C

OUT

Note: 1. Typical values for no mi na l su pp ly voltage. This parameter is only samp le d an d is not 100% tested.

48pFV
812pFV

= 0V

IN
OUT

= 0V

3-80 AT27LV256A

AT27LV256A

Programming Wavef or ms

(1)

Notes: 1. The Input Timing Reference is 0. 8V for VIL and 2.0V

.

for V

IH

and t

2. t

OE

must be accommodated by the programmer.

are characteristics of the device but

DFP

DC Programming Characteristics

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

Symbol Parameter

I

LI

V

IL

V

IH

V

OL

V

OH

I

CC2

I

PP2

V

ID

Input Load Current VIN = VIL, V
Input Low Lev el -0.6 0.8 V
Input High Level 2.0 VCC + 0.5 V
Output Low Voltage IOL = 2.1 mA 0.4 V
Output High Volta ge I
VCC Supply Current (Program and Verify) 25 mA
VPP Current CE = V
A9 Product Identi fication Voltage 11.5 12.5 V

3. When programming the AT27LV256A a 0.1 µF capacitor is
required across V
voltage transients.

Test
Conditions

IH

= -400 µA2.4V

OH

IL

and ground to suppress spurious

PP

Limits

Min

Max

±10 µA

25 mA

Units

3-81

AC Programming Characteristics

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

Sym­bol Parameter

Address Setup Time 2 µs

t

AS

OE Setup Time 2 µs

t

OES

Data Setup Time 2 µs

t

DS

Address Hold Time 0 µs

t

AH

Data Hold Time 2 µs

t

DH

OE High to

t

DFP

Output Floa t Delay
VPP Setup Time 2 µs

t

VPS

VCC Setup Time 2 µs

t

VCS

CE Program Pulse Width

t

PW

Data Valid from OE

t

OE

VPP Pulse Rise Time

t

PRT

During Programming

*AC Conditions of Test:

Input Rise and Fa ll Times (10% to 90%)...........20 ns

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

Test
Conditions*

(2)

(3)

(2)

(1)

Limits

Min Max

0130ns

95 105 µs

150 ns

50 ns

Units

Rapid Programming Algor ithm

A 100 µs CE pulse width is used to program. The address
is set to the first location. V
raised to 13.0V. Each address is first programmed with
one 100 µs

CE pulse without verification. Then a verifica­tion / reprogramming loop is executed for each address.
In the event a byte fails to pass verification, 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 considered failed. After the byte
verifies properly, the next address is selected until all have
been checked. V

is then lowered to 5.0V and VCC to

PP

5.0V. All bytes are read again and compar ed with the
original data to determine if the device passes or fails.

is raised to 6.5V and VPP is

CC

Notes: 1. VCC must be applied simultaneou sl y or before V

and removed simultan eously or aft e r VPP.

2. This parameter is only sampl ed 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 100 µsec ± 5%.

PP

Atmel’s 27LV256 A Inte grated
Product Identification Code

Pins

Codes

Manufacturer0000111101E
Device Type 1100011008C
Note: 1. The AT27LV256A has the same Product Identification

A0 O7 O6 O5 O4 O3 O2 O1 O0

Code as the AT27C256R. Both are programming
compatible.

(1)

Hex

Data

3-82 AT27LV256A

AT27LV256A

Ordering Information

t

ACC

(ns)

70 8 0.02 AT27LV256A-70JC 32J Commercial

90 8 0.02 AT27LV256A-90JC 32J Commercial

120 8 0.02 AT27LV256A-12JC 32J Commercial

150 8 0.02 AT27LV256A-15JC 32J Commercial

I

(mA)

CC

Active Standby

8 0.02 AT27LV256A-70JI 32J Industrial

8 0.02 AT27LV256A-90JI 32J Industrial

8 0.02 AT27LV256A-12JI 32J Industrial

8 0.02 AT27LV256A-15JI 32J Industrial

Ordering Code Package Operation Range

AT27LV256A-70RC 28R (0°C to 70°C)
AT27LV256A-70TC 28T

AT27LV256A-70RI 28R (-40°C to 85°C)
AT27LV256A-70TI 28T

AT27LV256A-90RC 28R (0°C to 70°C)
AT27LV256A-90TC 28T

AT27LV256A-90RI 28R (-40°C to 85°C)
AT27LV256A-90TI 28T

AT27LV256A-12RC 28R (0°C to 70°C)
AT27LV256A-12TC 28T

AT27LV256A-12RI 28R (-40°C to 85°C)
AT27LV256A-12TI 28T

AT27LV256A-15RC 28R (0°C to 70°C)
AT27LV256A-15TC 28T

AT27LV256A-15RI 28R (-40°C to 85°C)
AT27LV256A-15TI 28T

Package Type

32J 32 Lead, Plastic J-Leade d Chi p Carrier (PLCC)
28R 28 Lead, 0.330" Wide, Plastic Gull Wing Small Outl ine (SOIC)
28T 28 Lead, Plasti c Thin Smal l Outli ne Packag e (TSOP)

3-83