AT27C800
Absolute Maximum Ratings*
*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.
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)
Note:
1. 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.
VPP Supply Voltage with
Respect to Ground ..........................-2.0V to +14.0V(1)
Integrated UV Erase Dose............... 7258 W •sec/cm2
Operating Modes
Outputs
Mode\Pin
CE
VIL
VIL
VIL
X(1)
VIH
VIL
X
OE
VIL
VIL
VIL
VIH
X(1)
VIH
VIL
VIH
VIL
Ai
X(1)
X(1)
X(1)
X(1)
X(1)
Ai
BYTE/VPP
VIH
O0-O7 O8-O14 O15/A-1
Read Word-wide
Read Byte-wide Upper
Read Byte-wide Lower
Output Disable
Standby
DOUT
DOUT
DOUT
DOUT
High Z
High Z
High Z
High Z
DIN
DOUT
VIH
VIL
VIL
VIL
X
X(5)
Rapid Program(2)
VPP
VPP
VPP
VIH
PGM Verify
Ai
DOUT
PGM Inhibit
VIH
VIL
X(1)
High Z
Product Identification(4)
A9 = VH
Identification Code
(3)
A0 = VIH or VIL
A1 - A18 = VIL
Notes: 1. X can be VIL or VIH.
2. Refer to the programming characteristics tables in this data sheet.
3. VH = 12.0 ± 0.5V.
4. Two identifier words 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 word and high (VIH) to select the Device Code word.
5. Standby VCC current (ISB) is specified with VPP = VCC. VCC > VPP will cause a slight increase in ISB
.
3
ATMEL [ ATMEL ]
