DS1220AB Просмотр технического описания (PDF) - Unspecified
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DS1220AB Datasheet PDF : 7 Pages
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DS1220Y
16K Nonvolatile SRAM
DATA RETENTION MODE
The DS1220Y provides full-functional capability for Vcc greater than 4.5 volts and write protects at 4.25 nominal. Data is maintained in
the absence of Vcc without any additional support circuitry. The DS1220Y constantly monitors Vcc. Should the supply voltage decay,
the NV SRAM automatically write protects itself, all inputs become “don’t care,” and all outputs become high-impedance. As Vcc falls
below approximately 3.0 volts, a power switching circuit connects the lithium energy source to RAM to retain data. During power-up,
when Vcc rises above approximately 3.0 volts, the power switching circuit connects external Vcc to RAM and disconnects the lithium
energy source. Normal RAM operation can resume after Vcc exceeds 4.5 volts.
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature
Storage Temperature
Soldering Temperature
-0.3V to +7.0V
0℃ to 70℃; -40℃ to +85℃ for IND parts
-40℃ to +70℃; -40℃ to +85℃ for IND parts
260℃ for 10 seconds
* This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the
operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time
may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
PARAMETER
SYMBOL
MIN
Power Supply Voltage
Vcc
4.5
Input Logic 1
VIH
2.2
Input Logic 0
VIL
0.0
TYP
5.0
(TA: See Note 10)
MAX
5.5
Vcc
+0.8
UNITS
V
V
V
NOTES
DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Input Leakage Current
IIL
I/O Leakage Current
IIO
≥VIH ≤ Vcc
Output Current @ 2.4 V
IOH
Output Current @ 0.4V
IOL
Standby Current =2.2V
Standby Current =Vcc-0.5V
Operating Current tCYC =200ns
(Commercial)
ICCSI
ICCS2
Icco1
Operating Current tCYC=200ns
(Industrial)
Icco1
Write Protection Voltage
VTP
(TA:See Note 10; Vcc=5V ±10%)
MIN
TYP
MAX
-1.0
+10
-10
+1.0
-1.0
2.0
3.0
7.0
2.0
4.0
75
85
4.25
UNITS
µA
µA
mA
mA
mA
mA
mA
mA
V
NOTES
CAPACITANCE
PARAMETER
Input Capacitance
Input/Output Capacitance
SYMBOL
CIN
CI/O
MIN
TYP
5
5
MAX
10
12
(TA=25℃)
UNITS NOTES
pF
pF
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