AT27LV020A(1997) View Datasheet(PDF) - Atmel Corporation
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AT27LV020A Datasheet PDF : 9 Pages
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AT27LV020A
Block Diagram
Absolute Maximum Ratings*
Temperature Under Bias .................................. -40°C to +85°C
Storage Temperature ..................................... -65°C to +125°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 Maxi-
mum 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. Expo-
sure to absolute maximum rating conditions for extended peri-
ods 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 out-
put pin voltage is VCC + 0.75V dc which may be
exceeded if certain precautions are observed (con-
sult application notes) and which may overshoot to
+7.0 volts for pulses of less than 20 ns.
Operating Modes
Mode \ Pin
Read (2)
Output Disable (2)
Standby (2)
Rapid Program (3)
PGM Verify (3)
PGM Inhibit (3)
CE
OE
PGM
VIL
VIL
X (1)
X
VIH
X
VIH
X
X
VIL
VIH
VIL
VIL
VIL
VIH
VIH
X
X
Product Identification (3, 5)
VIL
VIL
X
Notes:
1. X can be VIL or VIH.
2. Read, output disable, and standby modes require,
3.0V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.
3. Refer to Programming Characteristics. Programming
modes require VCC = 6.5V.
4. VH = 12.0 ± 0.5V.
Ai
VPP
VCC
Outputs
Ai
X
VCC (2)
DOUT
X
X
VCC (2)
High Z
X
X
VCC (2)
High Z
Ai
VPP
VCC (3)
DIN
Ai
VPP
VCC (3)
DOUT
X
VPP
VCC (3)
High Z
A9 = VH (4)
A0 = VIH or VIL
A1 - A17 = VIL
X
VCC (3) Identification Code
5. 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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