AT27C800
Absolute Maximum Ratings*
Temperature Under Bias ...................-55°C to +125°C
Storage Temperature ........................-65°C to +150°C
Voltage on Any Pin with
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)
Integrated UV Erase Dose............... 7258 W •sec/cm
2
Note:
1.
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age 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.
Minimum voltage is -0.6V DC which may under-
shoot to -2.0V for pulses of less than 20 ns. Max-
imum output pin voltage is Vcc + 0.75V DC which
may overshoot to + 7.0V for pulses of less than
20 ns.
Operating Modes
Outputs
Mode\Pin
Read Word-wide
Read Byte-wide Upper
Read Byte-wide Lower
Output Disable
Standby
Rapid Program
(2)
PGM Verify
PGM Inhibit
Product Identification
(4)
CE
V
IL
V
IL
V
IL
X
(1)
V
IH
V
IL
X
V
IH
V
IL
OE
V
IL
V
IL
V
IL
V
IH
X
(1)
V
IH
V
IL
V
IH
V
IL
Ai
X
(1)
X
(1)
X
(1)
X
(1)
X
(1)
Ai
Ai
X
(1)
A9 = V
H(3)
A0 = V
IH
or V
IL
A1 - A18 = V
IL
BYTE/V
PP
V
IH
V
IL
V
IL
X
X
(5)
V
PP
V
PP
V
PP
V
IH
O
0
-O
7
D
OUT
D
OUT
D
OUT
O
8
-O
14
D
OUT
High Z
High Z
High Z
High Z
D
IN
D
OUT
High Z
Identification Code
O
15
/A-1
D
OUT
V
IH
V
IL
Notes:
1. X can be V
IL
or V
IH.
2. Refer to the programming characteristics tables in this data sheet.
3. V
H
= 12.0
±
0.5V.
4. Two identifier words 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 word and high (V
IH
) to select the Device Code word.
5. Standby V
CC
current (I
SB
) is specified with V
PP
= V
CC
.
V
CC
> V
PP
will cause a slight increase in I
SB
.
3
ATMEL [ ATMEL CORPORATION ]
