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 VCC = 3.6V
– 29 mW max. Active at 5 MHz for VCC = 3.6V
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
2-megabit
(256K x 8)
Unregulated
Battery-Voltage™
High-speed
OTP EPROM
Description
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
(continued)
power.
AT27BV020
Pin Configurations
Pin Name
Function
A0 - A17
Addresses
O0 - O7
Outputs
CE
Chip Enable
OE
Output Enable
PGM
Program Strobe
NC
No Connect
29
28
27
26
25
24
23
22
21
14
15
16
17
18
19
20
5
6
7
8
9
10
11
12
13
O1
O2
GND
O3
O4
O5
O6
A7
A6
A5
A4
A3
A2
A1
A0
O0
4
3
2
1
32
31
30
A12
A15
A16
VPP
VCC
PGM
A17
PLCC, Top View
A14
A13
A8
A9
A11
OE
A10
CE
O7
TSOP, VSOP Top View
Type 1
A11
A9
A8
A13
A14
A17
PGM
VCC
VPP
A16
A15
A12
A7
A6
A5
A4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
OE
A10
CE
O7
O6
O5
O4
O3
GND
O2
O1
O0
A0
A1
A2
A3
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 C C = 2.7V, any byte can be
accessed in less than 90 ns. With a typical power dissipation of only 18 mW at 5 MHz and VCC = 3V, the AT27BV020
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 VCC at 3.0V produces TTL
level outputs that are compatible with standard TTL logic
devices operating at VCC = 5.0V. At VCC = 2.7V, the part is
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™ Programming Algorithm reduces the time required to program the
Block Diagram
2
AT27BV020
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 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 µF bulk electrolytic capacitor should
be utilized, again connected between the VCC 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
Absolute Maximum Ratings*
Temperature under Bias .................................. -40°C to +85°C
*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
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.
Storage Temperature ..................................... -65°C to +125°C
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)
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
VCC + 0.75V DC which may be exceeded if certain precautions are observed (consult application notes) and which may
overshoot to +7.0V for pulses of less than 20 ns.
Operating Modes
Mode / Pin
Read
CE
(2)
Output Disable(2)
(2)
Standby
VIL
VIL
X
VIH
VIH
(3)
Rapid Program
OE
VIL
X
VIH
PGM
(1)
X
X
X
VIL
Ai
VPP
VCC
(2)
Outputs
Ai
X
VCC
X
X
VCC(2)
High-Z
X
(2)
High-Z
(3)
DIN
(3)
DOUT
X
Ai
VPP
VCC
VCC
DOUT
(3)
VIL
VIL
VIH
Ai
VPP
VCC
PGM Inhibit(3)
VIH
X
X
X
VPP
VCC(3)
High-Z
X
VCC(3)
Identification
Code
PGM Verify
(4)
Product Identification(3)(5)
Notes:
1.
2.
3.
4.
5.
VIL
VIL
X
A9 = VH
A0 = VIH or VIL
A1 - A17 = VIL
X Can be VIL or VIH.
Read, output disable, and standby modes require, 2.7V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.
Refer to Programming Characteristics. Programming modes requires VCC = 6.5V.
VH = 12.0 ± 0.5V.
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 (VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.
3
DC and AC Operating Conditions for Read Operation
Com.
Operating Temperature
(Case)
Ind.
VCC Power Supply
AT27BV020-90
AT27BV020-12
AT27BV020-15
0°C - 70°C
0°C - 70°C
0°C - 70°C
-40°C - 85°C
-40°C - 85°C
-40°C - 85°C
2.7V to 3.6V
2.7V to 3.6V
2.7V to 3.6V
5V ± 10%
5V ± 10%
5V ± 10%
DC and Operating Characteristics for Read Operation
Symbol
Parameter
Condition
Min
Max
Units
VCC = 2.7V to 3.6V
ILI
Input Load Current
VIN = 0V to VCC
±1
µA
ILO
Output Leakage Current
VOUT = 0V to VCC
±5
µA
VPP = VCC
10
µA
ISB1 (CMOS), CE = VCC=± 0.3V
20
µA
ISB2 (TTL), CE = 2.0 to VCC + 0.5V
100
µA
8
mA
IPP1(2)
VPP
ISB
VCC(1) Standby Current
ICC
VCC Active Current
VIL
Input Low Voltage
VIH
Input High Voltage
VOL
VOH
(1)
Read/Standby Current
Output Low Voltage
Output High Voltage
f = 5 MHz, IOUT = 0 mA, CE = VIL, VCC = 3.6V
VCC = 3.0 to 3.6V
-0.6
0.8
V
VCC = 2.7 to 3.6V
-0.6
0.2 x VCC
V
VCC = 3.0 to 3.6V
2.0
VCC + 0.5
V
VCC = 2.7 to 3.6V
0.7 x VCC
VCC + 0.5
V
IOL = 2.0 mA
0.4
V
IOL = 100 µA
0.2
V
IOL = 20 µA
0.1
V
IOH = -2.0=mA
2.4
V
IOH = -100 µA
VCC - 0.2
V
IOH = -20 µA
VCC - 0.1
V
VCC = 4.5V to 5.5V
ILI
Input Load Current
VIN = 0V to VCC
±1
µA
ILO
Output Leakage Current
VOUT = 0V to VCC
±5
µA
VPP = VCC
10
µA
ISB1 (CMOS), CE = VCC ± 0.3V
100
µA
ISB2 (TTL), CE = 2.0 to VCC + 0.5V
1
mA
f = 5 MHz, IOUT = 0 mA, CE = VIL
25
mA
IPP1(2)
VPP
ISB
VCC (1) Standby Current
ICC
VCC Active Current
VIL
Input Low Voltage
-0.6
0.8
V
VIH
Input High Voltage
2.0
VCC + 0.5
V
VOL
Output Low Voltage
IOL = 2.1 mA
0.4
V
Output High Voltage
IOH = -400 µA
VOH
Notes:
4
(1)
Read/Standby Current
2.4
1. VCC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP.
2. VPP may be connected directly to VCC, expect during programming. The supply current would then be the sum of ICC and IPP.
AT27BV020
V
AT27BV020
AC Characteristics for Read Operation
VCC = 2.7V to 3.6V and 4.5V to 5.5V
AT27BV020
-90
Symbol
tACC
(3)
tCE(2)
tOE
(2)(3)
Note:
Parameter
Condition
Address to Output Delay
CE = OE = VIL
90
CE to Output Delay
OE = VIL
OE to Output Delay
CE = VIL
OE or CE High to Output Float,
whichever occurred first
tDF(4)(5)
tOH
Min
-12
Output Hold from Address, CE or OE,
whichever occurred first
2,3,4,5. – See “AC Waveforms for Read Operation”.
0
Max
Min
-15
Max
Units
120
150
ns
90
120
150
ns
50
50
60
ns
40
40
50
ns
0
Max
Min
0
ns
AC Waveforms for Read Operation(1)
Notes:
1.
2.
3.
4.
5.
Timing measurement references 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 tCE - tOE after the falling edge of CE without impact on tCE.
OE may be delayed up to tACC - tOE after the address is valid without impact on tACC.
This parameter is only sampled and is not 100% tested.
Output float is defined as the point when data is no longer driven.
5
Input Test Waveform and
Measurement Level
Output Test Load
tR, tF < 20 ns (10% to 90%)
Note: CL = 100 pF
including jig capacitance.
l
Pin Capacitance
f = 1 MHz, T = 25°C(1)
Symbol
CIN
COUT
Note:
6
1.
Typ
Max
Units
Conditions
4
8
pF
VIN = 0V
8
12
pF
Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
AT27BV020
VOUT = 0V
AT27BV020
Programming Waveforms(1)
Notes:
1. The Input Timing Reference is 0.8V for VIL and 2.0V for VIH.
2. tOE and tDFP are characteristics of the device but must be accommodated by the programmer.
3. When programming the AT27BV020 a 0.1 µF capacitor is required across VPP and ground to suppress spurious voltage
transients.
DC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Limits
Symbol
Parameter
Test Conditions
ILI
Input Load Current
VIN = VIL,VIH
VIL
Input Low Level
VIH
Input High Level
VOL
Output Low Voltage
IOL = 2.1 mA
VOH
Output High Voltage
IOH = -400=µA
ICC2
VCC Supply Current
(Program and Verify)
IPP2
VPP Supply Current
VID
A9 Product
Identification Voltage
Min
Max
Units
±10
µA
-0.6
0.8
V
2.0
VCC + 0.5
V
0.4
V
2.4
CE = PGM = VIL
11.5
V
40
mA
20
mA
12.5
V
7
AC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Limits
(1)
Min
Test Conditions
Max
Units
Symbol
Parameter
tAS
Address Setup Time
2
µs
tCES
CE Setup Time
2
µs
tOES
OE Setup Time
2
µs
tDS
Data Setup Time
2
µs
tAH
Address Hold Time
0
µs
tDH
Data Hold Time
2
µs
tDFP
OE High to Output Float Delay(3)
tVPS
VPP Setup Time
tVCS
VCC Setup Time
Input Rise and Fall Times:
(10% to 90%) 20ns
Input Pulse Levels:
0.45V to 2.4V
Output Timing Reference Level:
0.8V to 2.0V
(2)
tPW
PGM Program Pulse Width
tOE
Data Valid from OE
tPRT
VPP Pulse Rise Time During
Programming
Notes:
0
Input Timing Reference Level:
0.8V to 2.0V
130
ns
2
µs
2
µs
95
105
µs
150
ns
50
ns
1. VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.
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(1)
Pins
A0
O7
O6
O5
O4
O3
O2
O1
O0
Hex
Data
Manufacturer
0
0
0
0
1
1
1
1
0
1E
Device Type
1
1
0
0
0
0
1
1
0
86
Codes
Note:
8
1. The AT27BV020 has the same Product Identification Code as the AT27C020. Both are programming compatible.
AT27BV020
AT27BV020
Rapid Programming Algorithm
A 100 µs PGM pulse width is used to program. The
address is set to the first location. VCC is raised to 6.5V and
VPP is raised to 13.0V. Each address is first programmed
with one 100 µs PGM 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. VPP is then lowered to 5.0V and VCC to
5.0V. All bytes are read again and compared with the original data to determine if the device passes or fails.
9
Ordering Information
ICC (mA)
VCC = 3.6V
tACC (ns)
Active
Standby
Ordering Code
Package
90
8
0.02
AT27BV020-90JC
AT27BV020-90TC
AT27BV020-90VC
32J
32T
32V
Commercial
(0°C to 70°C)
8
0.02
AT27BV020-90JI
AT27BV020-90TI
AT27BV020-90VI
32J
32T
32V
Industrial
(-40°C to 85°C)
8
0.02
AT27BV020-12JC
AT27BV020-12TC
AT27BV020-12VC
32J
32T
32V
Commercial
(0°C to 70°C)
8
0.02
AT27BV020-12JI
AT27BV020-12TI
AT27BV020-12VI
32J
32T
32V
Industrial
(-40°C to 85°C)
8
0.02
AT27BV020-15JC
AT27BV020-15TC
AT27BV020-15VC
32J
32T
32V
Commercial
(0°C to 70°C)
8
0.02
AT27BV020-15JI
AT27BV020-15TI
AT27BV020-15VI
32J
32T
32V
Industrial
(-40°C to 85°C)
120
150
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
Operation Range
AT27BV020
Packaging Information
32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC)
Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-016 AE
32T, 32-lead, Plastic Thin Small Outline Package
(TSOP)
Dimensions in Millimeters and (Inches)*
JEDEC OUTLINE MO-142 BD
*
.045(1.14) X 45˚
PIN NO. 1
IDENTIFY
.025(.635) X 30˚ - 45˚
.012(.305)
.008(.203)
.553(14.0)
.547(13.9)
.595(15.1)
.585(14.9)
.032(.813)
.026(.660)
.050(1.27) TYP
.300(7.62) REF
.430(10.9)
.390(9.90)
AT CONTACT
POINTS
INDEX
MARK
.530(13.5)
.490(12.4)
18.5(.728)
18.3(.720)
20.2(.795)
19.8(.780)
.021(.533)
.013(.330)
.030(.762)
.015(.381)
.095(2.41)
.060(1.52)
.140(3.56)
.120(3.05)
0.50(.020)
BSC
7.50(.295)
REF
0.25(.010)
0.15(.006)
8.20(.323)
7.80(.307)
1.20(.047) MAX
.022(.559) X 45˚ MAX (3X)
0.15(.006)
0.05(.002)
.453(11.5)
.447(11.4)
.495(12.6)
.485(12.3)
0
5 REF
0.20(.008)
0.10(.004)
0.70(.028)
0.50(.020)
*Controlling dimension: millimeters
32V, 32-lead, Plastic Thin Small Outline Package
(TSOP)
Dimensions in Millimeters and (Inches)
INDEX
MARK
12.5(.492)
12.3(.484)
0.50(.020)
BSC
7.50(.295)
REF
14.2(.559)
13.8(.543)
0.25(.010)
0.15(.006)
8.10(.319)
7.90(.311)
1.20(.047) MAX
0.15(.006)
0.05(.002)
0
5 REF
0.20(.008)
0.10(.004)
0.70(.028)
0.50(.020)
11
Atmel Headquarters
Atmel Operations
Corporate Headquarters
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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 suppor t 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
