AT27LV020A-12VJ [ATMEL]
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| 型号： | AT27LV020A-12VJ |
| 厂家： | 
ATMEL |
| 描述： | 暂无描述 可编程只读存储器 电动程控只读存储器 |
| 文件： | 总9页 (文件大小：223K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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)
2 Megabit
(256K x 8)
• High Reliability CMOS Technology
2,000V ESD Protection
200 mA Latchup Immunity
Low Voltage
OTP EPROM
• 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
AT27LV020A
Description
The AT27LV020A 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 3.0 to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using battery power.
Pin Configurations
Pin Name
A0 - A17
O0 - O7
CE
Function
Addresses
Outputs
Chip Enable
Output Enable
Program Strobe
OE
PGM
PLCC, Top View
TSOP, VSOP Top View
Type 1
0549B-A–9/97
Atmel's innovative design techniques provide fast speeds
that rival 5V parts while keeping the low power consump-
tion of a 3V supply. At VCC = 3.0V, any byte can be
accessed in less than 90 ns. With a typical power dissipa-
tion of only 18 mW at 5 MHz and VCC = 3.3V, the
AT27LV020A consumes less than one fifth the power of a
standard 5V EPROM. Standby mode supply current is typi-
cally less than 1 µA at 3.3V.
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 µF high frequency,
low inherent inductance, ceramic capacitor should be uti-
lized for each device. This capacitor should be connected
between the VCC 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.
The AT27LV020A is available in industry standard JEDEC
approved one-time programmable (OTP) plastic PLCC,
TSOP and VSOP packages. All devices feature two-line
control (CE, OE) to give designers the flexibility to prevent
bus contention.
The AT27LV020A operating with VCC at 3.0V produces
TTL level outputs that are compatible with standard TTL
logic devices operating at VCC = 5.0V. 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 AT27LV020A has additional features to ensure
high quality and efficient production use. The Rapid™Pro-
gramming Algorithm reduces the time required to program
the part and guarantees reliable programming. Program-
ming 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 pro-
gramming algorithms and voltages. The AT27LV020A pro-
grams exactly the same way as a standard 5V AT27C020
and uses the same programming equipment.
AT27LV020A
2
AT27LV020A
Block Diagram
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 (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)
*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 conditions beyond those indicated in the
operational sections of this specification is not implied. Expo-
sure to absolute maximum rating conditions for extended peri-
ods 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 out-
put pin voltage is VCC + 0.75V dc which may be
exceeded if certain precautions are observed (con-
sult application notes) and which may overshoot to
+7.0 volts for pulses of less than 20 ns.
Operating Modes
Mode \ Pin
CE
VIL
X
OE
VIL
VIH
X
PGM
X (1)
X
Ai
Ai
X
VPP
X
VCC
Outputs
DOUT
Read (2)
VCC
VCC
VCC
VCC
VCC
VCC
(2)
Output Disable (2)
Standby (2)
X
High Z
High Z
DIN
(2)
(2)
(3)
(3)
(3)
VIH
VIL
VIL
VIH
X
X
X
Rapid Program (3)
PGM Verify (3)
PGM Inhibit (3)
VIH
VIL
X
VIL
VIH
X
Ai
Ai
X
VPP
VPP
VPP
DOUT
High Z
(4)
A9 = VH
(3)
Product Identification (3, 5)
VIL
VIL
X
A0 = VIH or VIL
A1 - A17 = VIL
X
VCC
Identification Code
Notes: 1. X can be VIL or VIH.
5. 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.
2. Read, output disable, and standby modes require,
3.0V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.
3. Refer to Programming Characteristics. Programming
modes require VCC = 6.5V.
4. VH = 12.0 ± 0.5V.
3
DC and AC Operating Conditions for Read Operation
AT27LV020A
-90
-12
-15
Com.
Ind.
0°C - 70°C
-40°C - 85°C
3.0V to 3.6V
5V ± 10%
0°C - 70°C
-40°C - 85°C
3.0V to 3.6V
5V ± 10%
0°C - 70°C
-40°C - 85°C
3.0V to 3.6V
5V ± 10%
Operating Temperature (Case)
VCC Power Supply
DC and Operating Characteristics for Read Operation
Symbol
Parameter
Condition
Min
Max
Units
VCC = 3.0V to 3.6V
ILI
Input Load Current
VIN = 0V to VCC
±1
±5
µA
µA
µA
µA
µA
ILO
IPP1
ISB
Output Leakage Current
Read/Standby Current
VCC (1) Standby Current
VOUT = 0V to VCC
VPP = VCC
(2)
10
ISB1 (CMOS), CE = VCC ± 0.3V
20
I
SB2 (TTL), CE = 2.0 to VCC + 0.5V
100
ICC
VCC Active Current
f = 5 MHz, IOUT = 0 mA,
CE = VIL
8
mA
VIL
Input Low Voltage
Input High Voltage
Output Low Voltage
-0.6
2.0
0.8
V
V
VIH
VOL
VCC + 0 .5
IOL = 2.0 mA
IOH = -2.0 mA
0.4
V
V
VOH
Output High Voltage
2.4
VCC = 4.5V to 5.5V
ILI
Input Load Current
VIN = 0V to VCC
±1
±5
10
100
1
µA
µA
µA
µA
mA
ILO
IPP1
ISB
Output Leakage Current
Read/Standby Current
VCC (1) Standby Current
VOUT = 0V to VCC
(2)
VPP = VCC
ISB1 (CMOS), CE = VCC ± 0.3V
ISB2 (TTL), CE = 2.0 to VCC + 0.5V
ICC
VCC Active Current
f = 5 MHz, IOUT = 0 mA,
CE = VIL
25
mA
VIL
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
-0.6
2.0
0.8
VCC + 0.5
0.4
V
V
V
V
VIH
VOL
VOH
IOL = 2.1 mA
IOH = -400 µA
2.4
AT27LV020A
4
AT27LV020A
AC Characteristics for Read Operation (V = 3.0V to 3.6V and 4.5V to 5.5V)
CC
AT27LV020A
-12
-90
-15
Symbol
Parameter
Condition
CE = OE = VIL
OE = VIL
Min
Max
90
Min
Max
120
120
50
Min
Max
150
150
60
Units
ns
(3)
tACC
Address to Output Delay
CE to Output Delay
OE to Output Delay
(2)
tCE
90
ns
(2, 3)
tOE
CE = VIL
50
ns
(4, 5)
tDF
OE or CE High to Output Float,
whichever occurred first
40
40
50
ns
tOH
Output Hold from Address, CE or OE,
whichever occurred first
0
0
0
ns
(1)
AC Waveforms for Read Operation
Notes: 1. Timing measurement references are 0.8V and 2.0V.
Input AC drive levels are 0.45V and 2.4V, unless oth-
erwise specififed.
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.
2. OE may be delayed up to tCE - tOE after the falling
edge of CE without impact on tCE
3. OE may be delayed up to tACC - tOE after the address
is valid without impact on tACC
.
.
5
Input Test Waveform and Measurement
Level
Output Test Load
tR, tF < 20 ns (1% to 90%)
Note:
CL = 1 pF including jig clearance.
(1)
Pin Capacitance (f = 1 MHz, T = 25°C)
Typ
4
Max
8
Units
pF
Conditions
VIN = 0V
CIN
COUT
8
12
pF
VOUT = 0V
Note:
1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
AT27LV020A
6
AT27LV020A
(1)
Programming Waveforms
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 accomodated by the programmer.
3. When programming the AT27LV020A 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
Test
Symbol
ILI
Parameter
Conditions
Min
Max
±10
Units
µA
V
Input Load Current
VIN = VIL, VIH
VIL
Input Low Level
-0.6
2.0
0.8
VIH
Input High Level
VCC + 0.5
0.4
V
VOL
VOH
ICC2
IPP2
VID
Output Low Voltage
IOL = 2.1 mA
V
Output High Voltage
VCC Supply Current (Program and Verify)
VPP Supply Current
IOH = -400 µA
2.4
V
40
20
mA
mA
V
CE = PGM = VIL
A9 Product Identification Voltage
11.5
12.5
7
AC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
RapidProgramming 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.
Limits
Test
Min
Max
Symbol Parameter
Conditions* (1)
Units
µs
tAS
Address Setup Time
2
2
2
2
0
2
tCES
tOES
tDS
CE Setup Time
OE Setup Time
Data Setup Time
µs
µs
µs
tAH
Address Hold Time
Data Hold Time
µs
tDH
µs
OE High to Output
Float Delay
tDFP
0
130
ns
tVPS
tVCS
tPW
tOE
VPP Setup Time
2
2
µs
µs
µs
ns
VCC Setup Time
PGM Program Pulse Width
Data Valid from OE
95
105
150
VPP Pulse Rise Time
During Programming
tPRT
50
ns
*AC Conditions of Test:
Input Rise and Fall 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
Notes: 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 27LV020A Integrated
(1)
Product Identification Code
Pins
Hex
Data
Codes
A0 O7 O6 O5 O4 O3 O2 O1 O0
Manufacturer
Device Type
0
1
0
1
0
0
0
0
1
0
1
0
1
1
1
1
0
0
1E
86
Note:
1. The AT27LV020A has the same Product Identification
Code as the AT27C020. Both are programming com-
patible.
AT27LV020A
8
AT27LV020A
Ordering Information
tACC
ICC (mA)
CC = 3.6V
V
(ns)
Active
Standby
Ordering Code
Package
32J
Operation Range
Commercial
90
8
8
8
8
8
8
0.02
AT27LV020A-90JC
AT27LV020A-90TC
AT27LV020A-90VC
AT27LV020A-90JI
AT27LV020A-90TI
AT27LV020A-90VI
AT27LV020A-12JC
AT27LV020A-12TC
AT27LV020A-12VC
AT27LV020A-12JI
AT27LV020A-12TI
AT27LV020A-12VI
AT27LV020A-15JC
AT27LV020A-15TC
AT27LV020A-15VC
AT27LV020A-15JI
AT27LV020A-15TI
AT27LV020A-15VI
32T
32V
32J
(0°C to 70°C)
0.02
0.02
0.02
0.02
0.02
Industrial
32T
32V
32J
(-40°C to 85°C)
120
150
Commercial
32T
32V
32J
(0°C to 70°C)
Industrial
32T
32V
32J
(-40°C to 85°C)
Commercial
32T
32V
32J
(0°C to 70°C)
Industrial
32T
32V
(-40°C to 85°C)
Package Type
32J
32 Lead, Plastic J-Leaded Chip Carrier (PLCC)
32T
32V
32 Lead, Plastic Thin Small Outline Package (TSOP) 8 x 20 mm
32 Lead, Plastic Thin Small Outline Package (VSOP) 8 x 14 mm
9
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