ATMEL AT27LV020A-90VI, AT27LV020A-90VC, AT27LV020A-90TI, AT27LV020A-90TC, AT27LV020A-90JI Datasheet
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Features
•
Fast Read Access Time - 90 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 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
•
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 Latchup Immunity
•
Rapid™Programming Algorithm - 100 µs/byte (typical)
•
Two-Line Control
•
CMOS and TTL Compatible Inputs and Outputs
JEDEC Standard for LVTTL
•
Integrated Product Identification Code
•
Commercial and Industrial Temperature Ranges
Description
The AT27LV020A 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 3.0 to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using battery power.
2 Megabit
(256K x 8)
Low Voltage
OTP EPROM
AT27LV020A
Pin Configurations
Pin Name Function
A0 - A17 Addresses
O0 - O7 Outputs
CE
OE
PGM
Chip Enable
Output Enable
Program Strobe
PLCC, Top View TSOP, VSOP Top View
Type 1
0549B-A–9/97
1
Atmel's innovativ e desig n techniq ues pro vide fast speeds
that rival 5V parts while keep ing th e low pow er consum ption of a 3V supply. At V
= 3.0V, 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
= 3.3V, the
CC
AT27LV020A 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 AT27LV020 A is ava ilabl e in indu stry st andar d JEDE C
approved one-time programmable (OTP) plastic PLCC,
TSOP and VSOP packages. All devices feature two-line
control (CE
, OE) to give de sig ners th e flex ibil ity to preve nt
bus contention.
The AT27LV020A operating with V
at 3.0V produces
CC
TTL level outputs that are compatible with standard TTL
logic devic es operat ing a t V
= 5.0V. The device is also
CC
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 AT27LV020A has additional features to ensure
™
high quality and e fficient productio n use. Th e Rapid
Programming 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 Cod e electronically identifie s the
device and manufacturer. This feature is used by industry
standard programmin g equipment to select the prop er programming algorithms and voltages. The AT27LV020A 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 prod uce tr ans ie nt v olt age excur sions.
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 frequ enc y,
low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor shoul d 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, agai n connec ted betw een th e 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
2
AT27LV020A
AT27LV020A
Block Diagram Absolute Maximum Ratings*
Temperature Under Bias..................................-40°C to +85°C
Storage Te mperature .....................................-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 under “Absolute Maxi-
mum Ratings” may cause permanent damage to the device.
This is a stress rating only and fu nctional 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 affec t 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 VCC + 0.75V dc which may be
exceeded if certain precautions are observed (consult application notes) and which may overshoot to
+7.0 volts 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
Product Identification
(2)
(2)
(3)
(3)
(3)
(3, 5)
Notes: 1 . X can be VIL or VIH.
2. Read, output disable, and standby modes require,
3.0V ≤ V
≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.
CC
3. Refer to Programming Characteristics. Programming
modes require V
CC
4. VH = 12.0 ± 0.5V.
= 6.5V.
V
IL
V
IL
XVIHXXXV
V
IH
V
IL
V
IL
V
IH
V
IL
XX X XV
V
IH
V
IL
XX X VPPVCC
V
IL
X
(1)
V
IL
V
IH
X
Ai X VCC
Ai V
Ai V
(4)
A9 = V
H
A0 = VIH or VIL
A1 - A17 = V
IL
5. T w o i dentifi er b yte s may be selected. All Ai inputs ar e
held low (V
which is toggled low (V
Identification byte and high (V
Code byte.
PP
PP
PP
V
CC
CC
VCC
VCC
CC
XVCC
), except A9 which is set to VH and A0
IL
IL
Outputs
(2)
D
OUT
(2)
High Z
(2)
High Z
(3)
D
IN
(3)
D
OUT
(3)
High Z
(3)
Identification Code
) to select the Manufacturer’s
) to select the Device
IH
(1)
(1)
(1)
3
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