AT27C400 データシートの表示（PDF） - Atmel Corporation
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AT27C400 Datasheet PDF : 10 Pages
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Block Diagram
AT27C400
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)
Integrated UV Erase Dose...................7258 W •sec/cm2
*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 condi-
tions beyond those indicated in the operational sec-
tions 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 undershoot to -
2.0V for pulses of less than 20 ns. Maximum output
pin voltage is VCC + 0.75V dc which may overshoot to
+7.0V for pulses of less than 20 ns.
Operating Modes
Outputs
Mode/Pin
Read Word-wide
Read Byte-wide Upper
Read Byte-wide Lower
Output Disable
Standby
Rapid Program(2)
PGM Verify
PGM Inhibit
Product Identification(4)
CE
VIL
VIL
VIL
X(1)
VIH
VIL
X
VIH
VIL
OE
VIL
VIL
VIL
VIH
X(1)
VIH
VIL
VIH
VIL
Ai
X(1)
X(1)
X(1)
X(1)
X(1)
Ai
Ai
X(1)
A9 = VH(3)
A0 = VIH or VIL
A1 - A17 = VIL
BYTE/VPP
VIH
VIL
VIL
X
X(5)
VPP
VPP
VPP
VIH
O0 - O7
DOUT
DOUT
DOUT
O8 - O14
DOUT
High Z
High Z
High Z
High Z
DIN
DOUT
High Z
Identificatio
n
Code
O15/A-1
DOUT
VIH
VIL
Notes: 1. X can be VIL or VIH.
2. Refer to the programming characteristics tables in this data sheet.
3. VH = 12.0 ± 0.5V.
4. Two identifier words may be selected. All inputs are held low (VIL), except A9, which is set to VH, and A0, which is toggled
low (VIL) to select the Manufacturer’s Identification word and high (VIH) to select the Device Code word.
5. Standby VCC current (ISB) is specified with VPP = VCC. VCC > VPP will cause a slight increase in ISB.
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