AT27BV256 Ver la hoja de datos (PDF) - Atmel Corporation
Número de pieza
componentes Descripción
Fabricante
AT27BV256 Datasheet PDF : 9 Pages
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Block Diagram
AT27BV256
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
+7.0V for pulses of less than 20 ns.
Operating Modes
Mode \ Pin
CE
Read (2)
VIL
Output Disable (2)
VIL
Standby (2)
VIH
Rapid Program (3)
VIL
PGM Verify (3)
X
Optional PGM Verify (3)
VIL
PGM Inhibit (3)
VIH
Product Identification (3, 5)
VIL
OE
Ai
VPP
VIL
Ai
VCC
VIH
X (1)
VCC
X
X
VCC
VIH
Ai
VPP
VIL
Ai
VPP
VIL
Ai
VCC
VIH
X
VPP
A9 = VH (4)
VIL
A0 = VIH or VIL
VCC
A1 - A14 = VIL
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,
2.7V ≤ 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.
3-5
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