The AT27C080 chip 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 90 ns, eliminating the need for speed reducing
WAIT states on high-performance microprocessor systems.
Atmel’s scaled CMOS technology provides low active power consumption and fast
programming. Power consumption is typically 10 mA in active mode and less than
10 µA in standby mode.
The AT27C080 is available in a choice of packages, including; one-time programmable (OTP) plastic PLCC, PDIP and TSOP. All devices feature two-line control (CE
OE
) to give designers the flexibility to prevent bus contention.
With high density 1-Mbyte storage capability, the AT27C080 allows firmware to be
stored reliably and to be accessed by the system without the delays of mass storage
media.
Atmel’s AT27C080 has additional features to ensure high quality and efficient production use. The Rapid
part and guarantees reliable programming. Programming time is typically only
50 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.
Programming Algorithm reduces the time required to program the
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 non-conformance. At a minimum, 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
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
close as possible to the point where the power supply is connected to the array.
4.Block Diagram
AT27C080
and Ground terminals of the device, as close
CC
and Ground terminals. This capacitor should be positioned as
CC
5.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
Voltage on A9 with
Respect to Ground ......................................-2.0V to +14.0V
VPP Supply Voltage with
Respect to Ground .......................................-2.0V to +14.0V
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 overshoot to +7.0V for pulses of less than 20 ns.
V
CC
(1)
(1)
(1)
2
*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 sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
0360L–EPROM–12/07
3
6.Operating Modes
Mode/PinCEOE/V
ReadV
IL
Output DisableXV
StandbyV
Rapid Program
(2)
PGM VerifyV
PGM InhibitV
Product Identification
Notes:1. X can be VIL or V
(4)
IH.
IH
V
IL
IL
IH
V
IL
PP
V
IL
IH
XXHigh Z
V
PP
V
IL
V
PP
V
IL
AiOutputs
AiD
(1)
X
AiD
AiD
XHigh Z
A9 = V
A0 = VIH or V
A1 - A19 = V
(3)
H
IL
IL
2. Refer to Programming Characteristics.
3. V
= 12.0 ± 0.5V.
H
4. Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled
low (VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.
7.DC and AC Operating Conditions for Read Operation
AT27C080-90
Industrial Operating Temperature (Case)-40° C - 85° C
Power Supply5V ± 10%
V
CC
OUT
High Z
IN
OUT
Identification Code
8.DC and Operating Characteristics for Read Operation
SymbolParameterConditionMinMaxUnits
I
LI
I
LO
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
Input Load CurrentVIN = 0V to V
Output Leakage CurrentV
(1)
V
Standby Current
CC
= 0V to V
OUT
I
(CMOS), CE = VCC ± 0.3V100µA
SB1
(TTL), CE = 2.0 to V
I
SB2
VCC Active Currentf = 5 MHz, I
Input Low Voltage-0.60.8V
Input High Voltage2.0VCC + 0.5V
Output Low VoltageI
= 2.1 mA0.4V
OL
Output High VoltageIOH = -400 µA2.4V
Note:1. VCC must be applied simultaneously or before OE/ V
(Com., Ind.)±1.0µA
CC
(Com., Ind.)±5.0µA
CC
+ 0.5V1.0mA
CC
= 0 mA, CE = V
OUT
, and removed simultaneously or after OE/V
PP
IL
40mA
PP .
4
AT27C080
0360L–EPROM–12/07
9.AC Characteristics for Read Operation
SymbolParameterCondition
= O E /VPP
t
t
t
t
t
ACC
CE
OE
DF
OH
(4)
(3)
(3)(4)
(2)(5)
Address to Output Delay
CE to Output DelayOE = V
OE to Output DelayCE = V
OE or CE High to Output Float, whichever occurred first30ns
Output Hold from Address, CE or OE/VPP, whichever occurred first0ns
CE
= V
AT27C080
AT27C080-90
UnitsMinMax
IL
IL
IL
90ns
90ns
20ns
10. AC Waveforms for Read Operation
(1)
Notes:1. Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless otherwise specified.
2. t
is specified form OE/VPP or CE, whichever occurs first. Output float is defined as the point when data is no longer driven.
DF
3. OE
/V
may be delayed up to tCE - tOE after the falling edge of CE without impact on t
4. OE/V
PP
may be delayed up to t
PP
- tOE after the address is valid without impact on t
ACC
ACC
CE.
.
5. This parameter is only sampled and is not 100% tested.
0360L–EPROM–12/07
5
11. Input Test Waveform and Measurement Levels
tR, tF < 20 ns (10% to 90%)
12. Output Test Load
1.3V
(1N914)
OUTPUT
PIN
3.3K
CL
Note:CL = 100 pF including jig capacitance.
13. Pin Capacitance
f = 1 MHz, T = 25° C
(1)
SymbolTypMaxUnits Conditions
C
IN
C
OUT
48pFV
812pFV
IN
OUT
= 0V
= 0V
Note:1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
6
AT27C080
0360L–EPROM–12/07
14. Programming Waveforms
AT27C080
Notes:1. The Input Timing reference is 0.8V for VIL and 2.0V for VIH.
2. t
OE
and t
are characteristics of the device but must be accommodated by the programmer.
A 50 µs CE pulse width is used to program. The address is set to the first location. VCC is
raised to 6.5V and OE
50 µs CE
each address. In the event a byte fails to pass verification, up to 10 successive 50 µs pulses
are applied with a verification after each pulse. If the byte fails to verify after 10 pulses have
been applied, the part is considered failed. After the byte verifies properly, the next address is
selected until all have been checked. OE
are read again and compared with the original data to determine if the device passes or fails.
pulse without verification. Then a verification reprogramming loop is executed for
AT27C080
/VPP is raised to 13.0V. Each address is first programmed with one
/VPP is then lowered to VIL and VCC to 5.0V. All bytes
0360L–EPROM–12/07
9
19. Ordering Information
19.1Standard Package
I
t
ACC
(ns)
90400.1
CC
(mA)
Ordering CodePackageOperation RangeActiveStandby
AT27C080-90JI
AT27C080-90PI
AT27C080-90TI
32J
32P6
32T
Industrial
(-40° C to 85° C)
Note:
Not recommended for new designs. Use Green package option.
32T32-lead, Plastic Thin Small Outline Package (TSOP)
10
AT27C080
0360L–EPROM–12/07
20. Package Information
20.132J – PLCC
AT27C080
1.14(0.045) X 45˚
B
e
0.51(0.020)MAX
45˚ MAX (3X)
Notes:1. This package conforms to JEDEC reference MS-016, Variation AE.
2. Dimensions D1 and E1 do not include mold protrusion.
Allowable protrusion is .010"(0.254 mm) per side. Dimension D1
and E1 include mold mismatch and are measured at the extreme
material condition at the upper or lower parting line.