Features
•
Fast read access time – 45ns
•
Low-power CMOS operation
•
•
•
•
•
•
•
•
– 100µA max standby
– 25mA max active at 5MHz
JEDEC standard packages
– 32-lead PDIP
– 32-lead PLCC
5V ±10% supply
High-reliability CMOS technology
– 2000V ESD protection
– 200mA latchup immunity
Rapid programming algorithm – 100 µs/byte (typical)
CMOS- and TTL-compatible inputs and outputs
Integrated product identification code
Industrial temperature range
Green (Pb/halide-free) packaging option
1Mb (128K x 8)
One-time
Programmable,
Read-only Memory
Atmel AT27C010
1.
Description
The Atmel
®
AT27C010 is a low-power, high-performance 1,048,576-bit, one-time pro-
grammable, read-only memory (OTP EPROM) organized as 128K by 8 bits. Thedevice
requires only one 5V power supply in normal read mode operation. Any byte can be
accessed in less than 45ns, eliminating the need for speed reducing WAIT states on high-
performance microprocessor systems.
In read mode, the AT27C010 typically consumes only 8mA. Standby mode supply current
is typically less than 10µA.
The AT27C010 is available in a choice of industry standard, JEDEC approved, one-time pro-
grammable (OTP) PDIP and PLCC packages. All devices feature two-line control (CE, OE)
to give designers the flexibility to prevent bus contention.
With 128K byte storage capability, the AT27C010 allows firmware to be stored reliably and
to be accessed by the system without the delays of mass storage media.
The AT27C010 has additional features to ensure high quality and efficient production use.
The rapid programming algorithm reduces the time required to program the part and guar-
antees 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 pro-
gramming algorithms and voltages.
0321N–EPROM–4/11
2.
Pin configurations
s
Pin name
A0 - A16
O0 - O7
CE
OE
PGM
NC
Function
Addresses
Outputs
Chip enable
Output enable
Program strobe
No connect
A7
A6
A5
A4
A3
A2
A1
A0
O0
32-lead PLCC
Top view
A12
A15
A16
VPP
VCC
PGM
NC
VPP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
GND
32-lead PDIP
Top view
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
3.
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 transients may exceed datasheet limits, resulting in device nonconformance.
At a minimum, a 0.1µF, high-frequency, 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 4.7µF 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.
Figure 3-1.
Block diagram
2
Atmel AT27C010
0321N–EPROM–4/11
O1
O2
GND
O3
O4
O5
O6
14
15
16
17
18
19
20
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
Atmel AT27C010
4.
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 20ns. Maximum output pin voltage is
V
CC
+ 0.75V DC, which may overshoot to +7.0V for pulses of less than 20ns.
*NOTICE:
Stresses beyond those listed under “Absolute max-
imum 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.
5.
DC and AC characteristics
Table 5-1.
Mode/Pin
Read
Output disable
Standby
Rapid program
(2)
PGM verify
PGM inhibit
Product identification
(4)
Operating modes
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
Note:
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.
Table 5-2.
DC and AC operating conditions for read operation
Atmel AT27C010
-45
Operating temp. (case)
V
CC
power supply
Ind.
-40C - 85C
5V
10%
-70
-40C - 85C
5V
10%
3
0321N–EPROM–4/11
Table 5-3.
Symbol
I
LI
I
LO
IPP1
(2)
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
DC and operating characteristics for read operation
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
= 2.1mA
I
OH
= -400µA
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 = 5MHz, I
OUT
= 0mA, CE = V
IL
-0.6
2.0
Ind.
Ind.
Min
Max
±1
±5
10
100
1
25
0.8
V
CC
+ 0.5
0.4
Units
µA
µA
µA
µA
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 programming. The supply current would then be the sum of I
CC
and
I
PP
.
Table 5-4.
AC characteristics for read operation
Atmel AT27C010
-45
-70
Max
45
45
20
20
7
7
Min
Max
70
70
30
25
Units
ns
ns
ns
ns
ns
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
OE or CE high to output float, whichever occurred first
Output hold from address, CE or OE, whichever occurred first
Figure 5-1.
AC waveforms for read operation
(1)
Notes:
1. Timing measurement reference level is 1.5V for -45 devices. Input AC drive levels are V
IL
= 0.0V and V
IH
= 3.0V. Timing measure-
ment 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.
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.
4
Atmel AT27C010
0321N–EPROM–4/11
Atmel AT27C010
Figure 5-2.
Input test waveforms and measurement levels
For -45 devices only:
t
R
, t
F
< 5ns (10% to 90%)
For -70 devices:
t
R
, t
F
< 20ns (10% to 90%)
Figure 5-3.
Output test load
C
L
= 100pF including jig capacitance, except for the -45
devices, where C
L
= 30pF
Table 5-5.
Pin capacitance
f = 1MHz, 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
0321N–EPROM–4/11
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