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 µA max. (Less than 1 µA Typical) Standby for V
– 29 mW max. Active at 5 MHz for V
= 3.6V
CC
• Wide Selection of JEDEC Standard Packages
– 32-lead PLCC
– 32-lead TSOP (8 x 20 mm)
– 32-lead VSOP (8 x 14 mm)
• High Reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latch-up Immunity
• Rapid
™
Programming Algorithm – 100 µs/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
= 3.6V
CC
2-megabit
(256K x 8)
Unregulated
Battery-Voltage
High-speed
OTP EPROM
™
The AT27BV020 is a high-performance, low-power, low-voltage, 2,097,152-bit, onetime 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.
(continued)
Pin Configurations
Pin Name Function
A0 - A17 Addresses
O0 - O7 Outputs
CE
OE
PGM
NC No Connect
5
A7
6
A6
7
A5
8
A4
9
A3
10
A2
11
A1
12
A0
13
O0
Chip Enable
Output Enable
Program Strobe
PLCC, Top View
A12
A15
A16
VPP
VCC
PGM
432
1
323130
14151617181920
O1
O2
O3O4O5
GND
A17
29
28
27
26
25
24
23
22
21
O6
A14
A13
A8
A9
A11
OE
A10
CE
O7
A11
A13
A14
A17
PGM
VCC
VPP
A16
A15
A12
TSOP, VSOP Top View
Type 1
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
O7
29
O6
28
O5
27
O4
26
O3
25
GND
24
O2
23
O1
22
O0
21
A0
20
A1
19
A2
18
A3
17
AT27BV020
Rev. 0902D–04/01
1
Atmel’s innovative design techniques provide fast speeds
that rival 5V parts while keeping the low power consumption of a 3V supply. At V
= 2.7V, any byte can be
CC
accessed in less than 90 ns. With a typical power dissipation of only 18 mW at 5 MHz and V
= 3V, the AT27BV020
CC
consumes less than one fifth the power of a standard 5V
EPROM. Standby mode supply current is typically less
than 1 µA 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. All devices feature two-line control (CE
, OE) to give
designers the flexibility to prevent bus contention.
The AT27BV020 operating with V
at 3.0V produces TTL
CC
level outputs that are compatible with standard TTL logic
devices operating at V
= 5.0V. At VCC = 2.7V, the part is
CC
compatible with JEDEC approved low voltage battery operation (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
™
Program-
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 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 transients may exceed data sheet limits, resulting in device
nonconformance. 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
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
AT27BV020
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
AT27BV020
*NOTICE: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and
functional operation 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 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
V
+ 0.75V DC which may be exceeded if certain precautions are observed (consult application notes) and which may
CC
overshoot to +7.0V for pulses of less than 20 ns.
Operating Modes
Mode / Pin CE OE PGM Ai V
(2)
Read
Output Disable
Standby
Rapid Program
PGM Verify
PGM Inhibit
(2)
(2)
(3)
(3)
(3)
Product Identification
(3)(5)
V
IL
X V
V
IH
V
IL
V
IL
V
IH
V
IL
V
IL
IH
XXXXV
V
IH
V
IL
XX X VPPV
V
IL
(1)
X
Ai X V
XXXV
V
IL
V
IH
X
Ai V
Ai V
A9 = V
(4)
H
A0 = VIH or V
A1 - A17 = V
IL
IL
Notes: 1. X Can be VIL or VIH.
2. Read, output disable, and standby modes require, 2.7V ≤ V
3. Refer to Programming Characteristics. Programming modes requires V
= 12.0 ± 0.5V.
4. V
H
5. Two identifier bytes may be selected. All Ai inputs are held low (V
low (V
) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.
IL
≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.
CC
IL
= 6.5V.
CC
), except A9 which is set to VH and A0 which is toggled
PP
PP
PP
XV
V
CC
CC
CC
VCC
V
CC
CC
CC
CC
(2)
(2)
(2)
(3)
(3)
(3)
(3)
Outputs
D
OUT
High-Z
High-Z
D
IN
D
OUT
High-Z
Identification
Code
3
DC and AC Operating Conditions for Read Operation
AT27BV020-90 AT27BV020-12 AT27BV020-15
Operating Temperature
(Case)
Com. 0°C - 70°C0°C - 70°C0°C - 70°C
Ind. -40°C - 85°C-40°C - 85°C-40°C - 85°C
Power Supply
V
CC
5V ± 10% 5V ± 10% 5V ± 10%
DC and Operating Characteristics for Read Operation
Symbol Parameter Condition Min Max Units
V
= 2.7V to 3.6V
CC
2.7V to 3.6V 2.7V to 3.6V 2.7V to 3.6V
I
LI
I
LO
(2)
I
PP1
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
= 4.5V to 5.5V
V
CC
I
LI
I
LO
(2)
I
PP1
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
Notes: 1. V
2. 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
OUT
(CMOS), CE = V
I
SB1
(TTL), CE = 2.0 to VCC + 0.5V 100 µA
I
SB2
VCC Active Current f = 5 MHz, I
= 3.0 to 3.6V -0.6 0.8 V
V
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
CC
= 2.7 to 3.6V -0.6 0.2 x V
V
CC
V
= 3.0 to 3.6V 2.0 VCC + 0.5 V
CC
= 2.7 to 3.6V 0.7 x V
V
CC
= 2.0 mA 0.4 V
I
OL
I
= 100 µA 0.2 V
OL
= 20 µA 0.1 V
I
OL
= -2.0=mA 2.4 V
I
OH
I
= -100 µA V
OH
= -20 µA V
I
OH
Input Load Current VIN = 0V to V
Output Leakage Current V
(1)
V
Read/Standby Current VPP = V
PP
(1)
VCC
Standby Current
OUT
I
(CMOS), CE = VCC ± 0.3V 100 µA
SB1
(TTL), CE = 2.0 to VCC + 0.5V 1 mA
I
SB2
VCC Active Current f = 5 MHz, I
= 0V to V
CC
OUT
= 0V to V
CC
OUT
CC
CC
± 0.3V 20 µA
CC=
= 0 mA, CE = VIL, VCC = 3.6V 8 mA
CC
- 0.2 V
CC
- 0.1 V
CC
CC
CC
= 0 mA, 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
must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP.
CC
may be connected directly to VCC, expect during programming. The supply current would then be the sum of ICC and IPP.
PP
±1µA
±5µA
10 µA
CC
VCC + 0.5 V
±1µA
±5µA
10 µA
25 mA
V
4
AT27BV020
AC Characteristics for Read Operation
V
= 2.7V to 3.6V and 4.5V to 5.5V
CC
Symbol Parameter Condition
(3)
t
ACC
(2)
t
CE
(2)(3)
t
OE
(4)(5)
t
DF
t
OH
Note: 2,3,4,5. – See “AC Waveforms for Read Operation”.
Address to Output Delay CE = OE = V
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
AT27BV020
AT27BV020
-90 -12 -15
MinMaxMinMaxMinMax
IL
IL
IL
90 120 150 ns
90 120 150 ns
50 50 60 ns
40 40 50 ns
000 ns
Units
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.
may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE.
2. OE
3. OE
may be delayed up to t
- tOE after the address is valid without impact on t
ACC
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.
5
Input Test Waveform and
Output Test Load
Measurement Level
tR, tF < 20 ns (10% to 90%)
Note: CL = 100 pF
including jig capacitance.
l
Pin Capacitance
f = 1 MHz, T = 25°C
Symbol Typ Max Units Conditions
(1)
C
IN
C
OUT
Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
48pFV
812pFV
IN
OUT
= 0V
= 0V
6
AT27BV020
AT27BV020
Programming Waveforms
(1)
Notes: 1. The Input Timing Reference is 0.8V for VIL and 2.0V for VIH.
2. t
OE
and t
are characteristics of the device but must be accommodated by the programmer.
DFP
3. When programming the AT27BV020 a 0.1 µF capacitor is required across V
transients.
and ground to suppress spurious voltage
PP
DC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Symbol Parameter Test Conditions
I
V
V
V
V
I
I
V
LI
IL
IH
OL
OH
CC2
PP2
ID
Input Load Current V
= VIL,V
IN
IH
Input Low Level -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 Voltage IOH = -400=µA 2.4 V
VCC Supply Current
(Program and Verify)
VPP Supply Current CE = PGM = V
A9 Product
Identification Voltage
Limits
UnitsMin Max
±10 µA
40 mA
IL
20 mA
11.5 12.5 V
7
AC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Symbol Parameter Test Conditions
t
AS
t
CES
t
OES
t
DS
t
AH
t
DH
t
DFP
t
VPS
t
VCS
t
PW
t
OE
t
PRT
Address Setup Time
CE Setup Time 2 µs
OE Setup Time 2 µs
Input Rise and Fall Times:
Data Setup Time 2 µs
Address Hold Time 0 µs
Input Pulse Levels:
Data Hold Time 2 µs
OE High to Output Float Delay
VPP Setup Time 2 µs
(3)
Input Timing Reference Level:
VCC Setup Time 2 µs
PGM Program Pulse Width
(2)
Output Timing Reference Level:
Data Valid from OE 150 ns
VPP Pulse Rise Time During
Programming
(1)
(10% to 90%) 20ns
0.45V to 2.4V
0.8V to 2.0V
0.8V to 2.0V
Limits
UnitsMin Max
2µs
0 130 ns
95 105 µs
50 ns
Notes: 1. V
must be applied simultaneously or before VPP and removed simultaneously or after VPP.
CC
2. This parameter is only sampled 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%.
Atmel’s 27BV020 Integrated Product Identification Code
Pins
Codes
(1)
Hex
DataA0 O7 O6 O5 O4 O3 O2 O1 O0
Manufacturer 0000111101E
Device Type 11000011086
Note: 1. The AT27BV020 has the same Product Identification Code as the AT27C020. Both are programming compatible.
8
AT27BV020
Rapid Programming Algorithm
AT27BV020
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 event a byte fails to pass verification, up to
10 successive 100
pulse without verification. Then a
µs pulses are applied with a verification
is raised to 6.5V and
CC
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
5.0V. All bytes are read again and compared with the original data to determine if the device passes or fails.
is then lowered to 5.0V and VCC to
PP
9
Ordering Information
(mA)
I
CC
= 3.6V
V
CC
t
(ns)
ACC
90 8 0.02 AT27BV020-90JC
8 0.02 AT27BV020-90JI
120 8 0.02 AT27BV020-12JC
8 0.02 AT27BV020-12JI
150 8 0.02 AT27BV020-15JC
8 0.02 AT27BV020-15JI
Ordering Code Package Operation RangeActive Standby
AT27BV020-90TC
AT27BV020-90VC
AT27BV020-90TI
AT27BV020-90VI
AT27BV020-12TC
AT27BV020-12VC
AT27BV020-12TI
AT27BV020-12VI
AT27BV020-15TC
AT27BV020-15VC
AT27BV020-15TI
AT27BV020-15VI
32J
32T
32V
32J
32T
32V
32J
32T
32V
32J
32T
32V
32J
32T
32V
32J
32T
32V
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)
Package Type
32J 32-lead, Plastic J-leaded Chip Carrier (PLCC)
32T 32-lead, Plastic Thin Small Outline Package (TSOP) (8 x 20 mm)
32V 32-lead, Plastic Thin Small Outline Package (VSOP) (8 x 14 mm)
10
AT27BV020
Packaging Information
(
)
AT27BV020
32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC)
Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-016 AE
.045(1.14) X 45˚
.032(.813)
.026(.660)
.050(1.27) TYP
.453(11.5)
.447(11.4)
.495(12.6)
.485(12.3)
PIN NO. 1
IDENTIFY
.300(7.62) REF
.430(10.9)
.390(9.90)
.025(.635) X 30˚ - 45˚
.553(14.0)
.547(13.9)
.595(15.1)
.585(14.9)
AT CONTACT
POINTS
.022(.559) X 45˚ MAX (3X)
.012(.305)
.008(.203)
.530(13.5)
.490(12.4)
.021(.533)
.013(.330)
.030(.762)
.015(.381)
.095(2.41)
.060(1.52)
.140(3.56)
.120(3.05)
32T, 32-lead, Plastic Thin Small Outline Package
(TSOP)
Dimensions in Millimeters and (Inches)*
JEDEC OUTLINE MO-142 BD
*
INDEX
MARK
0.50(.020)
BSC
0
REF
5
7.50(.295)
REF
8.20(.323)
7.80(.307)
0.15(.006)
0.05(.002)
18.5(.728)
18.3(.720)
0.25(.010)
0.15(.006)
0.70(.028)
0.50(.020)
20.2(.795)
19.8(.780)
1.20(.047) MAX
0.20(.008)
0.10(.004)
*Controlling dimension: millimeters
32V, 32-lead, Plastic Thin Small Outline Package
(TSOP)
Dimensions in Millimeters and (Inches)
INDEX
MARK
0.50(.020)
BSC
0
REF
5
7.50(.295)
REF
8.10(.319)
7.90(.311)
0.15(.006)
0.05(.002)
12.5(.492)
12.3(.484)
0.25(.010)
0.15(.006)
0.70(.028)
0.50
.020
14.2(.559)
13.8(.543)
1.20(.047) MAX
0.20(.008)
0.10(.004)
11
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© Atmel Corporation 2001.
Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for
any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without
notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are
not authorized for use as critical components in life support devices or systems.
Marks bearing ® and/or ™ are registered trademarks and trademarks of Atmel Corporation.
Terms and product names in this document may be trademarks of others.
Printed on recycled paper.
0902D–04/01/xM
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