1
PLCC, Top View
Features
Fast Read Access Time - 90 ns
Dual Voltage Range Operation
Unregulated Battery Power Supply Range, 2.7V to 3.6V
or Standard 5V
10% Supply Range
Compatible with JEDEC Standard AT27C020
Low Power CMOS Operation
20
A max. (less than 1
A typical) Standby for V
CC
= 3.6V
29 mW max. Active at 5 MHz for V
CC
= 3.6V
Wide Selection of JEDEC Standard Packages
32-Lead PLCC
32-Lead TSOP (8 x 20mm)
32-Lead VSOP (8 x 14mm)
42-Ball CBGA (8 x 8mm)
High Reliability CMOS Technology
2,000V ESD Protection
200 mA Latchup Immunity
Rapid
TM
Programming Algorithm - 100
s/byte (typical)
CMOS and TTL Compatible Inputs and Outputs
JEDEC Standard for LVTTL and LVBO
Integrated Product Identification Code
Commercial and Industrial Temperature Ranges
Description
The AT27BV020 is a high-performance, low-power, low-voltage 2,097,152-bit one-
time programmable read only memory (OTP EPROM) organized as 256K by 8 bits. It
requires only one supply in the range of 2.7 to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using either regulated or unregulated battery
power.
AT27BV020
2-Megabit
(256K x 8)
Unregulated
Battery-Voltage
TM
High Speed
OTP EPROM
AT27BV020
TSOP, VSOP Top View
Type 1
0902A-A10/97
Pin Configurations
Pin Name
Function
A0 - A17
Address
O0 - O7
Outputs
CE
Chip Enable
OE
Output Enable
PGM
Program Strobe
(continued)
CBGA Top View
A
B
C
D
E
F
1
2
3
4
5
6
7
GND
A17
A10
A14
A16
A15
O6
O7
NC
A13
A11
A12
VCC
O4
O5
A9
PGM
A8
VCC
NC
NC
NC
NC
NC
O2
NC
O3
NC
A7
VPP
OE
O0
O1
A6
A4
A5
GND
CE
A0
A3
A1
A2
AT27BV020
2
Atmel's innovative design techniques provide fast speeds
that rival 5V parts while keeping the low power consump-
tion of a 3V supply. At V
CC
= 2.7V, any byte can be
accessed in less than 90 ns. With a typical power dissipa-
tion of only 18 mW at 5 MHz and V
CC
= 3V, the AT27BV020
consumes less than one fifth the power of a standard 5V
EPROM. Standby mode supply current is typically less than
1
A at 3V. The AT27BV020 simplifies system design and
stretches battery lifetime even further by eliminating the
need for power supply regulation
The AT27BV020 is available in industry standard JEDEC
approved one-time programmable (OTP) plastic PLCC,
TSOP and VSOP packages, as well as a 42-ball, 1 mm
pitch, plastic chip-scale Ball Grid Array package (CBGA).
All devices feature two-line control (CE, OE) to give design-
ers the flexibility to prevent bus contention.
The AT27BV020 operating with V
CC
at 3.0V produces TTL
level outputs that are compatible with standard TTL logic
devices operating at V
CC
= 5.0V. At V
CC
= 2.7V, the part is
compatible with JEDEC approved low voltage battery oper-
ation (LVBO) interface specifications. The device is also
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 AT27BV020 has additional features to ensure high
quality and efficient production use. The Rapid
TM
Program-
ming Algorithm reduces the time required to program the
part and guarantees reliable programming. Programming
time is typically only 100
s/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 AT27BV020 programs
exactly the same way as a standard 5V AT27C020 and
uses the same programming equipment.
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 tran-
sients may exceed data sheet limits, resulting in device
non-conformance. At a minimum, a 0.1
F high frequency,
low inherent inductance, ceramic capacitor should be uti-
lized for each device. This capacitor should be connected
between the V
CC
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 4.7
F bulk electrolytic capacitor should
be utilized, again connected between the V
CC
and Ground
terminals. This capacitor should be positioned as close as
possible to the point where the power supply is connected
to the array.
AT27BV020
3
Block Diagram
Absolute Maximum Ratings*
*NOTICE:
Stresses beyond those listed under "Absolute 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-
tions beyond those indicated in the operational sec-
tions of this specification is not implied. Exposure to
absolute maximum rating conditions for extended
periods may affect device reliability.
Note:
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
CC
+ 0.75V DC which may be exceeded if cer-
tain precautions are observed (consult application notes)
and which may overshoot to +7.0V for pulses of less than
20 ns.
Temperature Under Bias .................................. -40C to +85C
Storage Temperature ..................................... -65C to +125C
Voltage on Any Pin with
Respect to Ground .........................................-2.0V to +7.0V
(1)
Voltage on A9 with
Respect to Ground ......................................-2.0V to +14.0V
(1)
V
PP
Supply Voltage with
Respect to Ground .......................................-2.0V to +14.0V
(1)
Operating Modes
Notes:
1. X Can be V
IL
or V
IH
.
2. Read, output disable, and standby modes require, 2.7V
V
CC
3.6V, or 4.5V
V
CC
5.5V.
3. Refer to Programming Characteristics. Programming modes requires V
CC
= 6.5V.
4. V
H
= 12.0
0.5V.
5. Two identifier bytes may be selected. All Ai inputs are held low (V
IL
), except A9 which is set to V
H
and A0 which is toggled low
(V
IL
) to select the Manufacturer's Identification byte and high (V
IH
) to select the Device Code byte.
Mode / Pin
CE
OE
PGM
Ai
V
PP
V
CC
Outputs
Read
(2)
V
IL
V
IL
X
(1)
Ai
X
V
CC
(2)
D
OUT
Output Disable
(2)
X V
IH
X
X
X
V
CC
(2)
High Z
Standby
(2)
V
IH
X
X
X
X
V
CC
(2)
High Z
Rapid Program
(3)
V
IL
V
IH
V
IL
Ai
V
PP
V
CC
(3)
D
IN
PGM Verify
(3)
V
IL
V
IL
V
IH
Ai
V
PP
V
CC
(3)
D
OUT
PGM Inhibit
(3)
V
IH
X
X
X
V
PP
V
CC
(3)
High Z
Product Identification
(3)(5)
V
IL
V
IL
X
A9 = V
H
(4)
A0 = V
IH
or V
IL
A1 - A17 = V
IL
X
V
CC
(3)
Identification
Code
AT27BV020
4
DC and AC Operating Conditions for Read Operation
DC and Operating Characteristics for Read Operation
Notes:
1.
V
CC
must be applied simultaneously with or before
V
PP
, and removed simultaneously with or after V
PP
.
2.
V
PP
may be connected directly to V
CC
, expect during programming. The supply current would then be the sum of I
CC
and I
PP
.
AT27BV020
-90
-12
-15
Operating Temperature (Case)
Com.
0C - 70C
0C - 70C
0C - 70C
Ind.
-40C - 85C
-40C - 85C
-40C - 85C
V
CC
Power Supply
2.7V to 3.6V
2.7V to 3.6V
2.7V to 3.6V
5V
10%
5V
10%
5V
10%
Symbol
Parameter
Condition
Min
Max
Units
V
CC
= 2.7V to 3.6V
I
LI
Input Load Current
V
IN
= 0V to V
CC
1
A
I
LO
Output Leakage Current
V
OUT
= 0V to V
CC
5
A
I
PP1
(2)
V
PP
(1)
Read/Standby Current
V
PP
= V
CC
10
A
I
SB
V
CC
(1)
Standby Current
I
SB1
(CMOS), CE = V
CC
0.3V
20
A
I
SB2
(TTL), CE = 2.0 to V
CC
+ 0.5V
100
A
I
CC
V
CC
Active Current
f = 5 MHz, I
OUT
= 0 mA, CE = V
IL
, V
CC
= 3.6V
8
mA
V
IL
Input Low Voltage
V
CC
= 3.0 to 3.6V
-0.6
0.8
V
V
CC
= 2.7 to 3.6V
-0.6
0.2 x V
CC
V
V
IH
Input High Voltage
V
CC
= 3.0 to 3.6V
2.0
V
CC
+ 0.5
V
V
CC
= 2.7 to 3.6V
0.7 x V
CC
V
CC
+ 0.5
V
V
OL
Output Low Voltage
I
OL
= 2.0 mA
0.4
V
I
OL
= 100
A
0.2
V
I
OL
= 20
A
0.1
V
V
OH
Output High Voltage
I
OH
= -2.0
mA
2.4
V
I
OH
= -100
A
V
CC
- 0.2
V
I
OH
= -20
A
V
CC
- 0.1
V
V
CC
= 4.5V to 5.5V
I
LI
Input Load Current
V
IN
= 0V to V
CC
1
A
I
LO
Output Leakage Current
V
OUT
= 0V to V
CC
5
A
I
PP1
(2)
V
PP
(1)
Read/Standby Current
V
PP
= V
CC
10
A
I
SB
V
CC
(1)
Standby Current
I
SB1
(CMOS), CE = V
CC
0.3V
100
A
I
SB2
(TTL), CE = 2.0 to V
CC
+ 0.5V
1
mA
I
CC
V
CC
Active Current
f = 5 MHz, I
OUT
= 0 mA, CE = V
IL
25
mA
V
IL
Input Low Voltage
-0.6
0.8
V
V
IH
Input High Voltage
2.0
V
CC
+ 0.5
V
V
OL
Output Low Voltage
I
OL
= 2.1 mA
0.4
V
V
OH
Output High Voltage
I
OH
= -400
A
2.4
V
= Preliminary Information
AT27BV020
5
AC Characteristics for Read Operation
(V
CC
= 2.7V to 3.6V and 4.5V to 5.5V)
Note:
2,3,4,5. - see AC Waveforms for Read Operation
AC Waveforms for Read Operation
(1)
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 t
CE
- t
OE
after the falling edge of CE without impact on t
CE
.
3.
OE may be delayed up to t
ACC
- t
OE
after the address is valid without impact on t
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.
Symbol
Parameter
Condition
AT27BV020
Units
-90
-12
-15
Min
Max
Min
Max
Min
Max
t
ACC
(3)
Address to Output Delay
CE = OE = V
IL
90
120
150
ns
t
CE
(2)
CE to Output Delay
OE = V
IL
90
120
150
ns
t
OE
(2)(3)
OE to Output Delay
CE = V
IL
50
50
60
ns
t
DF
(4)(5)
OE or CE High to Output Float,
whichever occurred first
40
40
50
ns
t
OH
Output Hold from Address, CE or OE,
whichever occurred first
0
0
0
ns
= Preliminary Information
PDF 
ZIP