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AT27BV040 Datasheet(PDF) 3 Page - ATMEL Corporation

Part No. AT27BV040
Description  4 Megabit 512K x 8 Unregulated Battery-Voltage High Speed OTP CMOS EPROM
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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AT27BV040 Datasheet(HTML) 3 Page - ATMEL Corporation

   
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3
0346G–EPROM–12/07
AT27BV040
3.
Switching Considerations
Switching between active and standby conditions via the Chip Enable pin may produce transient
voltage excursions. Unless accommodated by the system design, these transients may exceed
datasheet limits, resulting in device non-conformance. At a minimum, a 0.1 µF high frequency,
low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor
should be connected between the V
CC and Ground terminals of the device, as close to the
device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards
with large EPROM arrays, a 4.7 µF bulk electrolytic capacitor should be utilized, again con-
nected between the V
CC and Ground terminals. This capacitor should be positioned as close as
possible to the point where the power supply is connected to the array.
4.
Block Diagram
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
V
CC + 0.75V DC which may be exceeded if certain precautions are observed (consult application notes) and which may
overshoot to +7.0V for pulses of less than 20 ns.
5.
Absolute Maximum Ratings*
Temperature Under Bias.................................. -40°C to +85°C
*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
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)


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