Features
•
Fast Read Access Time - 45 ns
•
Low-Power CMOS Operation
– 100 µA max. Standby
– 25 mA max. Active at 5 MHz (AT27C010L)
– 35 mA max. Active at 5 MHz (AT27C010)
JEDEC Standard Packages
– 32-Lead 600-mil PDIP
– 32-Lead PLCC
– 32-Lead TSOP
5V
±
10% Supply
High Reliability CMOS Technology
– 2000V ESD Protection
– 200 mA Latchup Immunity
Rapid™ Programming Algorithm - 100 µs/byte (typical)
CMOS and TTL Compatible Inputs and Outputs
Integrated Product Identification Code
Commercial, Industrial and Automotive Temperature Ranges
•
•
•
•
•
•
•
1-Megabit
(128K x 8)
OTP EPROM
AT27C010(L)
Description
The AT27C010(L) is a low-power, high-performance 1,048,576-bit one-time program-
mable read only memory (OTP EPROM) organized as 128K by 8 bits. They require
only one 5V power supply in normal read mode operation. Any byte can be accessed
in less than 45 ns, eliminating the need for speed reducing WAIT states on high-per-
formance microprocessor systems.
Two power versions are offered. In read mode, the AT27C010 typically consumes 25
mA while the AT27C010L requires only 8 mA. Standby mode supply current for both
parts is typically less than 10 µA.
(continued)
Pin Configurations
Pin Name
A0 - A16
O0 - O7
CE
OE
PGM
NC
Function
Addresses
Outputs
Chip Enable
Output Enable
Program Strobe
No Connect
PDIP Top View
VPP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
GND
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
VCC
PGM
NC
A14
A13
A8
A9
A11
OE
A10
CE
O7
O6
O5
O4
O3
A11
A9
A8
A13
A14
NC
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
A7
A6
A5
A4
A3
A2
A1
A0
O0
PLCC Top View
A12
A15
A16
VPP
VCC
PGM
NC
5
6
7
8
9
10
11
12
13
4
3
2
1
32
31
30
29
28
27
26
25
24
23
22
21
A14
A13
A8
A9
A11
OE
A10
CE
O7
1M bit EPROM
TSOP Top View
Type 1
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
O1
O2
GND
O3
O4
O5
O6
14
15
16
17
18
19
20
Rev. 0321J–07/98
1
The AT27C010(L) in available in a choice of industry stan-
dard JEDEC-approved one-time programmable (OTP)
plastic PDIP, PLCC, and TSOP packages. All devices fea-
ture two line control (CE, OE) to give designers the flexibil-
ity to prevent bus contention.
With 128K byte storage capability, the AT27C010(L) allows
firmware to be stored reliably and to be accessed by the
system without the delays of mass storage media.
Atmel’s 27C010(L) have 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.
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 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 V
CC
and Ground
terminals. This capacitor should be positioned as close as
possible to the point where the power supply is connected
to the array.
Block Diagram
2
AT27C010(L)
AT27C010(L)
Absolute Maximum Ratings*
Temperature Under Bias ................................ -55°C to +125°C
Storage Temperature ..................................... -65°C to +150°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)
V
PP
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
CC
+ 0.75V dc which may overshoot to +7.0 volts for pulses of less than 20 ns.
*NOTICE:
Stresses beyond those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to
the device. This is a stress rating only and func-
tional operation of the device at these or any other
conditions beyond those indicated in the opera-
tional sections of this specification is not implied.
Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
Operating Modes
Mode\Pin
Read
Output Disable
Standby
Rapid Program
(2)
PGM Verify
PGM Inhibit
Product Identification
(4)
Notes:
1. X can be V
IL
or V
IH
.
2. Refer to Programming Characteristics.
3. V
H
= 12.0
±
0.5V.
4. Two identifier bytes may be selected. All Ai inputs are held low (V
IL
), except A9 which is set to V
H
and A0 which is toggled low
(V
IL
) to select the Manufacturer’s Identification byte and high (V
IH
) to select the Device Code byte.
CE
V
IL
X
V
IH
V
IL
V
IL
V
IH
V
IL
OE
V
IL
V
IH
X
V
IH
V
IL
X
V
IL
PGM
X
(1)
X
X
V
IL
V
IH
X
X
Ai
Ai
X
X
Ai
Ai
X
A9 = V
H(3)
A0 = V
IH
or V
IL
A1 - A16 = V
IL
V
PP
X
X
X
V
PP
V
PP
V
PP
X
D
OUT
High Z
High Z
D
IN
D
OUT
High Z
Identification Code
Outputs
3
DC and AC Operating Conditions for Read Operation
AT27C010/AT27C010L
-45
Com.
Operating
Temp. (Case)
V
CC
Power Supply
Ind.
Auto.
5V
±
10%
5V
±
10%
5V
±
10%
0°C - 70°C
-40°C - 85°C
-55
0°C - 70°C
-40°C - 85°C
-70
0°C - 70°C
-40°C - 85°C
-90
0°C - 70°C
-40°C - 85°C
-40°C - 125°C
5V
±
10%
-12
0°C - 70°C
-40°C - 85°C
-40°C - 125°C
5V
±
10%
-15
0°C - 70°C
-40°C - 85°C
-40°C - 125°C
5V
±
10%
DC and Operating Characteristics for Read Operation
Symbol
I
LI
Parameter
Input Load Current
Condition
Com., Ind.
V
IN
= 0V to V
CC
Auto.
Com., Ind.
I
LO
IPP1
(2)
I
SB
Output Leakage Current
V
PP(1))
Read/Standby Current
V
CC(1)
Standby Current
V
OUT
= 0V to V
CC
V
PP
= V
CC
I
SB1
(CMOS), CE = V
CC
± 0.3V
I
SB2
(TTL), CE = 2.0 to V
CC
+ 0.5V
f = 5 MHz, I
OUT
= 0 mA,
CE = V
IL
AT27C010(L)
AT27C010
-0.6
2.0
I
OL
= 2.1 mA
I
OH
= -400
µA
2.4
Auto.
Min
Max
±
1
±
5
±
5
±10
10
100
1
25
35
0.8
V
CC
+ 0.5
0.4
Units
µA
µA
µA
µA
µA
µA
mA
mA
mA
V
V
V
V
I
CC
V
IL
V
IH
V
OL
V
OH
V
CC
Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Notes:
1. V
CC
must be applied simultaneously or before V
PP
, and removed simultaneously or after V
PP
..
2. V
PP
may be connected directly to V
CC
, except during programming. The supply current would then be the sum of I
CC
and I
PP
..
AC Characteristics for Read Operation
AT27C010/AT27C010L
-45
Symbol
t
ACC(3)
t
CE(2)
t
OE(2)(3)
t
DF(4)(5)
t
OH
Parameter
Address to Output Delay
CE to Output Delay
OE to Output Delay
Condition
CE = OE = V
IL
OE = V
IL
CE = V
IL
Min
Max
45
45
20
20
7
7
-55
Min
Max
55
55
25
20
7
-70
Min
Max
70
70
30
25
0
-90
Min
Max
90
90
35
25
0
-12
Min
Max
120
120
35
30
0
-15
Min
Max
150
150
40
35
Units
ns
ns
ns
ns
ns
OE or CE High to Output Float, whichever occurred
first
Output Hold from Address, CE or OE, whichever
occurred first
Notes:
2,3,4,5. - see AC Waveforms for Read Operation.
4
AT27C010(L)
AT27C010(L)
AC Waveforms for Read Operation
(1)
Notes:
1.
Timing measurement reference level is 1.5V for -45 and -55 devices. Input AC drive levels are V
IL
= 0.0V and V
IH
= 3.0V.
Timing measurement reference levels for all other speed grades are V
OL
= 0.8V and V
OH
= 2.0V. Input AC drive levels are
V
IL
= 0.45V and V
IH
= 2.4V.
OE may be delayed up to t
CE
- t
OE
after the falling edge of CE without impact on t
CE
.
OE may be delayed up to t
ACC
- t
OE
after the address is valid without impact on t
ACC
.
This parameter is only sampled and is not 100% tested.
Output float is defined as the point when data is no longer driven.
2.
3.
4.
5.
Input Test Waveforms and
Measurement Levels
For -45 and -55 devices only:
Output Test Load
t
R
, t
F
< 5 ns (10% to 90%)
For -70, -90, -12, -15, and -20 devices:
Note:
C
L
= 100 pF including jig
capacitance, except for
the -45 and -55 devices,
where C
L
= 30 pF.
t
R
, t
F
< 20 ns (10% to 90%)
Pin Capacitance
f = 1 MHz, T = 25°C
(1)
Symbol
C
IN
C
OUT
Note:
Typ
4
8
Max
8
12
Units
pF
pF
Conditions
V
IN
= 0V
V
OUT
= 0V
1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
5
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