Atmel AT27C080 User Manual
Features
• Fast read access time – 90ns
• Low-power CMOS operation
– 100µA max standby
– 40mA max active at 5MHz
• JEDEC standard packages
– 32-lead PLCC
– 32-lead PDIP
• 5V 10% supply
• High-reliability CMOS technology
– 2,000V ESD protection
– 200mA latchup immunity
• Rapid
programming algorithm – 50µs/byte (typical)
• CMOS- and TTL-compatible inputs and outputs
• Integrated product identification code
• Industrial temperature range
• Green (Pb/halide-free) packaging option
1. Description
The Atmel® AT27C080 is a low-power, high-performance 8,388,608-bit, one-time programmable, read-only memory (OTP EPROM) organized as 1M by 8 bits. The AT27C080
requires only one 5V power supply in normal read mode operation. Any byte can be
accessed in less than 90ns, eliminating the need for speed reducing WAIT states on highperformance microprocessor systems.
8Mb (1M x 8)
One-time
Programmable,
Read-only Memory
Atmel AT27C080
The Atmel scaled CMOS technology provides low active power consumption and fast programming. Power consumption is typically 10mA in active mode and less than 10µA in
standby mode.
The AT27C080 is available in a choice of industry standard, JEDEC-approved, one-time programmable (OTP) PLCC and PDIP packages. All devices feature two-line control (CE, OE)
to give designers the flexibility to prevent bus contention.
With high-density, 8Mb storage capability, the AT27C080 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media.
The AT27C080 has additional features to ensure high quality and efficient production use.
The rapid programming algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 50µs/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.
0360N–EPROM–042015
2. Pin configurations
Pin name Function
A0 - A19 Addresses
O0 - O7 Outputs
CE Chip enable
OE/VPP Output enable/Program supply
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 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 4.7µF 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.
A7
A6
A5
A4
A3
A2
A1
A0
O0
32-lead PLCC
Top view
A12
A15
A16
A19
432
5
6
7
8
9
10
11
12
13
14151617181920
O1
O2
1
O3O4O5
GND
VCC
A18
323130
A17
29
28
27
26
25
24
23
22
21
O6
A14
A13
A8
A9
A11
OE/VPP
A10
CE
O7
32-lead PDIP
Top view
1
A19
2
A16
3
A15
4
A12
5
A7
6
A6
7
A5
8
A4
9
A3
10
A2
11
A1
12
A0
13
O0
14
O1
15
O2
16
GND
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
VCC
A18
A17
A14
A13
A8
A9
A11
OE/VPP
A10
CE
O7
O6
O5
O4
O3
Figure 3-1. Block diagram
2
Atmel AT27C080
0360N–EPROM–042015
4. Absolute maximum ratings*
Atmel AT27C080
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
Voltage on A9 with
respect to ground . . . . . . . . . . . . . . . . . -2.0V to +14.0V
VPP supply voltage with
respect to ground . . . . . . . . . . . . . . . . . . -2.0V to +14.0V
Integrated UV erase dose . . . . . . . . . . . . . . . 7258W•s/cm
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
+ 0.75V DC, which may overshoot to +7.0V for pulses of less than 20ns.
CC
5. DC and AC characteristics
Table 5-1. Operating modes
Mode/Pin CE OE/V
Read V
Output disable X V
Standby V
Rapid program
PGM verify V
PGM inhibit V
Product identification
Notes: 1. X can be V
(2)
(4)
or VIH.
IL
2. Refer to programming characteristics.
= 12.0 ± 0.5V.
3. V
H
4. Two identifier bytes may be selected. All Ai inputs are held low (V
gled low (V
) to select the manufacturer’s identification byte and high (VIH) to select the device code byte.
IL
*NOTICE: Stresses beyond those listed under “Absolute
maximum 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
(1)
sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect device reliability.
(1)
(1)
2
PP
IL
IH
V
IL
IL
IH
V
IL
V
IL
IH
X X High Z
V
PP
V
IL
V
PP
V
IL
), except A9, which is set to VH, and A0, which is tog-
IL
Ai Outputs
Ai D
(1)
X
Ai D
Ai D
X High Z
A9 = V
A0 = VIH or V
A1 - A19 = V
(3)
H
IL
IL
OUT
High Z
IN
OUT
Identification code
Table 5-2. DC and AC operating conditions for read operation
Industrial operating temperature (case) -40C - 85C
power supply 5V 10%
V
CC
0360N–EPROM–042015
Atmel AT27C080-90
3
Table 5-3. DC and operating characteristics for read operation
Symbol Parameter Condition Min Max Units
I
LI
I
LO
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
Input load current VIN = 0V to V
Output leakage current V
(1)
V
standby current
CC
= 0V to V
OUT
(CMOS), CE = VCC 0.3V 100 A
I
SB1
(TTL), CE = 2.0 to V
I
SB2
VCC active current f = 5MHz, I
Input low voltage -0.6 0.8 V
Input high voltage 2.0 VCC + 0.5 V
Output low voltage I
= 2.1mA 0.4 V
OL
Output high voltage IOH = -400µA 2.4 V
Note: 1. VCC must be applied simultaneously or before OE/ V
(Com., Ind.) ±1.0 A
CC
(Com., Ind.) ±5.0 A
CC
+ 0.5V 1.0 mA
CC
= 0mA, CE = V
OUT
, and removed simultaneously or after OE/V
PP
IL
40 mA
PP
Table 5-4. AC characteristics for read operation
Atmel AT27C080-90
Symbol Parameter Condition
t
t
t
t
t
ACC
CE
OE
DF
OH
(4)
(3)
(3)(4)
(2)(5)
Address to output delay
CE to output delay OE = V
OE to output delay CE = V
OE or CE high to output float, whichever occurred first 30 ns
Output hold from address, CE or OE/VPP, whichever occurred first 0 ns
CE = OE/VPP
= V
IL
IL
UnitsMin Max
IL
90 ns
90 ns
20 ns
4
Atmel AT27C080
0360N–EPROM–042015
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