AT27C256R-90JC Ver la hoja de datos (PDF) - Atmel Corporation
Número de pieza
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Fabricante
AT27C256R-90JC Datasheet PDF : 9 Pages
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Block Diagram
AT27C256R
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 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 over-
shoot to +7.0V for pulses of less than 20 ns.
Operating Modes
Mode \ Pin
Read
Output Disable
Standby
Rapid Program (2)
PGM Verify (2)
Optional PGM Verify (2)
PGM Inhibit (2)
CE
VIL
VIL
VIH
VIL
X (1)
VIL
VIH
Product Identification (4)
VIL
Notes: 1. X can be VIL or VIH.
2. Refer to Programming characteristics.
3. VH = 12.0 ± 0.5V.
OE
VIL
VIH
X (1)
VIH
VIL
VIL
VIH
VIL
Ai
VPP
Outputs
Ai
X (1)
X (1)
VCC
VCC
VCC
DOUT
High Z
High Z
Ai
VPP
DIN
Ai
VPP
DOUT
Ai
X (1)
A9 = VH (3)
A0 = VIH or VIL
A1 - A14 = VIL
VCC
VPP
DOUT
High Z
VCC
Identification
Code
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 Identi-
fication byte and high (VIH) to select the Device Code byte.
3-127
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