Rainbow Electronics AT27LV040A User Manual
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 AT27C040
•
Low Power 3.3-volt CMOS Operation
– 20 µA max. (less than 1 µA typical) Standby for VCC = 3.6V
– 36 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/b y te (typic al)
•
CMOS and TTL Compatible Inputs and Outputs
– JEDEC Standard for LVTTL
•
Integrated Product Identification Code
•
Commercial and Industrial Temperature Ranges
Description
The AT27LV040A is a high performance, low power, low voltage, 4,194,304-bit onetime programmable read on ly mem ory (O TP EPRO M) organ ized as 51 2K by 8 bi ts. 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.
Atmel’s innovative design techniques provide fast speeds that rival 5V parts while
keeping the low power consumption of a 3V supply. At V
= 3.0V, any byte can be
CC
accessed in less than 90 ns. Wi th a ty pical power diss ip ati on of onl y 18 mW at 5 MHz
and V
= 3.3V, the AT27LV040A consumes less than one half the power of a stan-
CC
dard 5V EPROM. Standby mode supply current is typically less than 1 µA at 3.3V.
(continued)
Pin Configurations
4-Megabit
(512K x 8)
Low Voltage
OTP EPROM
AT27LV040A
Pin Name Function
A0 - A18 Addresses
O0 - O7 Outputs
CE
OE
Chip Enable
Output En able
PLCC Top View
A12
A15
A16
VPP
VCC
A18
A17
432
1
O2
O3O4O5
GND
323130
29
28
27
26
25
24
23
22
21
O6
A14
A13
A8
A9
A11
OE
A10
CE
O7
A7
A6
A5
A4
A3
A2
A1
A0
O0
5
6
7
8
9
10
11
12
13
14151617181920
O1
A11
A13
A14
A17
A18
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
02
23
01
22
O0
21
A0
20
A1
19
A2
18
A3
17
Rev. 0557B–10/98
1
The AT27LV040A is availa ble in in dus try stan dard J EDE Capproved one-time programmable (OTP) plastic PLCC,
TSOP, and VSOP packages. All devices feature two-line
control (CE
bus contention.
The AT27LV040A operating with V
level outputs that are compatible with standard TTL logic
devices operating at V
ble 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 AT27LV040A has additional features to ensure
high quality and eff icie nt produc tion 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 Inte grated
Product Identifi cation Code el ectronically identifies th e
device and manufacturer. This feature is used by indu stry
standard programming equipment to se lect the proper programming algori thms and voltag es. The AT 27LV04 0A pro-
, OE) to give designers the flexibility to prevent
at 3.0V produces TTL
CC
= 5.0V. The device is also capa-
CC
Block Diagram
grams exactly the same way as a standard 5V AT27C040
and uses the same programming equipment.
System Considerations
Switching between active and standby conditions via the
Chip Enable pin may produ ce tra ns ien t vo ltag e ex cu rs i ons .
Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in device
non-conforman ce. At a mini mum, 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
2
AT27LV040A
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
AT27LV040A
*NOTICE: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage to the de vic e. T his is a stres s r ating o nly an d
functional opera tion 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 reli abi li ty
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
+ 0.75V dc which may be exceeded if certain precautions are observed (consult application notes) and which may
V
CC
overshoot to +7.0V for pulses of less than 20 ns.
Operating Modes
Mode \ Pin CE OE Ai V
(2)
Read
Output Disable
Standby
Rapid Program
PGM Verify
PGM Inhibit
(2)
(2)
(3)
(3)
(3)
Product Identification
Notes: 1 . X can be V
(3)(5)
or VIH.
IL
V
IL
V
IL
Ai X
XVIHXXV
V
IH
V
IL
XXXV
V
IH
Ai V
XVILAi V
V
IH
V
IL
V
IH
V
IL
XVPPV
A9 = V
(4)
H
A0 = VIH or VIL
A1 - A18 = V
IL
2. Read, output disable, and standby modes require, 3.0V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.
3. Refer to Programming C haracteri stics. Programming modes require V
= 6.5V.
CC
4. VH = 12.0 ± 0.5V.
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 toggle d low
(V
) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.
IL
PP
(1)
PP
PP
XV
V
CC
(2)
V
CC
(2)
CC
(2)
CC
(3)
V
CC
(3)
V
CC
(3)
CC
(3)
CC
Outputs
D
OUT
High Z
High Z
D
IN
D
OUT
High Z
Identification Code
3
DC and AC Operating Conditions for Read Operation
AT27LV040A-90 AT27LV040A-12 AT27LV040A-15
Operating Temperature
(Case)
Com. 0°C - 70°C 0°C - 70°C 0°C - 70°C
Ind. -40°C - 85°C -40°C - 85°C -40°C - 85°C
VCC Power Supply
3.0V to 3.6V 3.0V to 3.6V 3.0V to 3.6V
5V ± 10% 5V ± 10% 5V ± 10%
DC and Operating Characteristics for Read Operation
Symbol Parameter Condition Min Max Units
V
= 3.0V to 3.6V
CC
I
LI
I
LO
(2)
I
PP1
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
V
= 4.5V to 5.5V
CC
I
LI
I
LO
(2)
I
PP1
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
Notes: 1. VCC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP.
Input Load Current VIN = 0V to V
Output Leakage Current V
(1)
V
Read/Standby Current VPP = V
PP
(1)
V
Standby Current
CC
= 0V to V
OUT
CC
I
(CMOS), CE = V
SB1
I
(TTL), CE = 2.0 to VCC + 0.5V 100 µA
SB2
VCC Active Current f = 5 MHz, I
CC
CC
CC
= 0 mA, CE = V
OUT
0.3V 20 µA
±
IL
±1 µA
±5 µA
10 µA
10 mA
Input Low Voltage -0.6 0.8 V
Input High Voltage 2.0 VCC + 0.5 V
Output Low Voltage IOL = 2.0 mA 0.4 V
Output High Voltage IOH = -2.0 mA 2.4 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
= 0V to V
OUT
CC
I
(CMOS), CE = VCC ± 0.3V 100 µA
SB1
I
(TTL), CE = 2.0 to VCC + 0.5V 1 mA
SB2
VCC Active Current f = 5 MHz, I
CC
CC
= 0 mA, CE = V
OUT
IL
±1 µA
±5 µA
10 µA
30 mA
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 µA2.4V
may be connected directly to VCC, except during programming. The supply current would then be the sum of ICC and IPP.
2. V
PP
4
AT27LV040A
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