AT27C256R-70JU Просмотр технического описания (PDF) - Atmel Corporation
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AT27C256R-70JU Datasheet PDF : 13 Pages
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Atmel AT27C256R
4. 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)
*NOTICE:
Stresses beyond those listed under “Absolute
maximum 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. Exposure to absolute
maximum rating conditions for extended periods may
affect device reliability.
VPP supply voltage with
respect to ground . . . . . . . . . . . . . . . . . . -2.0V to +14.0V(1)
Note: 1. Minimum voltage is -0.6V DC, which may undershoot to -2.0V for pulses of less than 20ns. Maximum output pin voltage is
VCC + 0.75V DC, which may overshoot to +7.0V for pulses of less than 20ns.
5. DC and AC characteristics
Table 5-1. Operating Modes
Mode/Pin
CE
OE
Ai
VPP
Outputs
Read
Output disable
Standby
Rapid program(2)
PGM verify(2)
Optional PGM verify(2)
PGM inhibit(2)
Product identification(4)
VIL
VIL
VIH
VIL
X(1)
VIL
VIH
VIL
VIL
VIH
X(1)
VIH
VIL
VIL
VIH
VIL
Ai
X(1)
X(1)
Ai
Ai
Ai
X(1)
A9 = VH(3)
A0 = VIH or VIL
A1 - A14 = VIL
VCC
DOUT
VCC
High Z
VCC
High Z
VPP
DIN
VPP
DOUT
VCC
DOUT
VPP
High Z
VCC
Identification code
Notes: 1. X can be VIL or VIH.
2. Refer to programming characteristics.
3. VH = 12.0 ± 0.5V.
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 tog-
gled low (VIL) to select the manufacturer’s identification byte and high (VIH) to select the device code byte.
Table 5-2. DC and AC operating conditions for read operation
Operating temp. (case)
VCC supply
Ind.
Auto.
Atmel AT27C256R
-45
-70
-40C - 85C
-40C - 85C
-40C - 125C
5V ±10%
5V ±10%
3
0014O–EPROM–10/11
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