AT27LV256A Datasheet, PDF (3/9 Pages) ATMEL Corporation – 256K 32K x 8 Low Voltage OTP CMOS EPROM

Block Diagram
AT27LV256A
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 indi-
cated in the operational sections of this specification is not
implied. Exposure to absolute 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 out-
put pin voltage is VCC + 0.75V dc which may be ex-
ceeded if certain precautions are observed (consult
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⁾
Optional PGM Verify ⁽³⁾
PGM Inhibit ⁽³⁾
Product Identification ^{(3, 5)}
CE
VIL
VIL
VIH
VIL
X ⁽¹⁾
VIL
VIH
VIL
OE
VIL
VIH
X ⁽¹⁾
VIH
VIL
VIL
VIH
VIL
Ai
Ai
X ⁽¹⁾
X ⁽¹⁾
Ai
Ai
Ai
X ⁽¹⁾
A9 = VH ⁽⁴⁾
A0 = VIH or VIL
A1 - A14 = VIL
VPP
VCC
VCC
VCC
VPP
VPP
VCC
VPP
VCC
VCC
VCC ⁽²⁾
VCC ⁽²⁾
VCC ⁽²⁾
VCC ⁽³⁾
VCC ⁽³⁾
VCC ⁽³⁾
VCC ⁽³⁾
VCC ⁽³⁾
Outputs
DOUT
High Z
High Z
DIN
DOUT
DOUT
High Z
Identification
Code
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.
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 Identi-
fication byte and high (VIH) to select the Device Code byte.
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