AT27C010/L
Features
•
•
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•
•
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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 and Industrial Temperature Ranges
1 Megabit
(128K x 8)
OTP
CMOS EPROM
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
µ
A.
(continued)
PDIP Top View
Pin Configurations
Pin Name
A0 - A16
O0 - O7
CE
OE
PGM
NC
Function
Addresses
Outputs
Chip Enable
Output Enable
Program Strobe
No Connect
AT27C010/L
PLCC Top View
TSOP Top View
Type 1
0321I
3-153
Description
(Continued)
The AT27C010/L in available in a choice of industry stand-
ard 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 program-
ming algorithms and voltages.
System Considerations
Switching between active and standby conditions via the
Chip Enable pin may produce transient voltage excur-
sions. Unless accommodated by the system design, these
transients may exceed data sheet limits, resulting in de-
vice non-conformance. At a minimum, a 0.1
µF
high fre-
quency, 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
V
CC
and Ground terminals. This capacitor should be posi-
tioned as close as possible to the point where the power
supply is connected to the array.
3-154
AT27C010/L
AT27C010/L
Block Diagram
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)
*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 indi-
cated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions
for extended periods 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 V
CC
+ 0.75V dc which may over-
shoot to +7.0V for pulses of less than 20 ns.
Operating Modes
Mode \ Pin
Read
Output Disable
Standby
Rapid Program
(2)
PGM Verify
PGM Inhibit
Product Identification
(4)
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
Outputs
D
OUT
High Z
High Z
D
IN
D
OUT
High Z
Identification
Code
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 Identi-
fication byte and high (V
IH
) to select the Device Code byte.
3-155
DC and AC Operating Conditions for Read Operation
AT27C010 / AT27C010L
-45
Com.
Operating
Temp. (Case) Ind.
V
CC
Supply
0°C - 70°C
-40°C - 85°C
5V
±
10%
-55
0°C - 70°C
-40°C - 85°C
5V
±
10%
-70
0°C - 70°C
-40°C - 85°C
5V
±
10%
-90
0°C - 70°C
-40°C - 85°C
5V
±
10%
-12
0°C - 70°C
-40°C - 85°C
5V
±
10%
-15
0°C - 70°C
-40°C - 85°C
5V
±
10%
DC and Operating Characteristics for Read Operation
Symbol
I
LI
I
LO
I
PP1
(2)
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
Parameter
Input Load Current
Output Leakage Current
V
PP
(1)
Read/Standby Current
V
CC
(1)
Standby Current
V
CC
Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
I
OL
= 2.1 mA
I
OH
= -400
µA
2.4
Condition
V
IN
= 0V to V
CC
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
AT27C010L
AT27C010
-0.6
2.0
Min
Max
±1
±5
10
100
1
25
35
0.8
V
CC
+ 0.5
0.4
Units
µA
µA
µA
µA
mA
mA
mA
V
V
V
V
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 program-
ming. The supply current would then be the sum of I
CC
and I
PP
.
AC Characteristics for Read Operation
AT27C010 / AT27C010L
-45
Symbol Parameter
t
ACC (3)
Address to
Output Delay
t
CE (2)
CE to Output Delay
-55
Min
Max
-70
Min
Max
-90
Min
Max
-12
Min
Max
-15
Min
Max
Condition
CE = OE
= V
IL
OE = V
IL
CE = V
IL
Min
Max
Units
ns
ns
ns
ns
ns
45
45
20
20
7
7
55
55
25
20
7
70
70
30
25
0
90
90
35
25
0
120
120
35
30
0
150
150
40
35
t
OE (2, 3)
OE to Output Delay
OE or
t
DF (4, 5)
OutputCE High to
Float, whichever occurred first
t
OH
Notes:
Output Hold from
Address, CE or OE,
whichever occurred first
2, 3, 4, 5. - see AC Waveforms for Read Operation.
3-156
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 refer-
ence 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.
2. OE may be delayed up to t
CE
- t
OE
after the falling
edge of CE without impact on t
CE
.
3. OE may be delayed up to t
ACC
- t
OE
after the address is valid
without impact on t
ACC
.
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.
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: CL = 100 pF including
jig capacitance, except for the
-45 and -55 devices, where
CL= 30 pF.
t
R
, t
F
< 20 ns (10% to 90%)
Pin Capacitance
(f = 1 MHz, T = 25°C)
Typ
C
IN
C
OUT
Note:
(1)
Max
8
12
Units
pF
pF
Conditions
V
IN
= 0V
V
OUT
= 0V
4
8
1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
3-157
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