AT27C020-12JC View Datasheet(PDF) - Atmel Corporation
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Description
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AT27C020-12JC Datasheet PDF : 9 Pages
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AT27C020
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)
VPP Supply Voltage with
Respect to Ground ............................. -2.0V to +14.0V(1)
*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 abso-
lute maximum rating conditions for extended
periods may affect device reliability.
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 VCC +
0.75V DC which may overshoot to +7.0V for
pulses of less than 20 ns.
Operating Modes
Mode/Pin
Read
CE OE PGM
Ai
VIL
VIL
X(1)
Ai
VPP
Outputs
X
DOUT
Output Disable
X
VIH
X
X
X
High Z
Standby
Rapid Program(2)
VIH
X
X
VIL
VIH
VIL
X
X
High Z
Ai
VPP
DIN
PGM Verify
VIL
VIL
VIH
Ai
VPP
DOUT
PGM Inhibit
Product Identification(4)
Notes: 1. X can be VIL or VIH.
2. Refer to Programming Characteristics.
VIH
X
VIL
VIL
X
X
VPP
High Z
A9 = VH(3)
X A0 = VIH or VIL X Identification Code
A1 - A17 = VIL
3. VH = 12.0 ± 0.5V.
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.
3
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