DS21T09
9 of 10
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground -1.0V to +7.0V
Operating Temperature 0°C to 70°C
Storage Temperature -55°C to +125°C
Soldering Temperature 260°C 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.
The Dallas Semiconductor DS21T09 is built to the highest quality standards and manufactured for long
term reliability. All Dallas Semiconductor devices are made using the same quality materials and
manufacturing methods. However, the DS21T09 is not exposed to environmental stresses, such as burn-
in, that some industrial applications require. For specific reliability information on this product, please
contact the factory in Dallas at (972) 371-4448.
RECOMMENDED OPERATING CONDITIONS (0°C to 70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
TERMPWR Voltage V
TP
4.00 5.25 V
Logic 1 V
IH
2.0 V
TP
+ 0.3 V 1
Logic 0 V
IL
-0.3 +0.8 V 1
DC CHARACTERISTICS (0°C to 70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
TERMPWR Current I
TP
I
TP
10
500
14
mA
mA
2, 4
2, 5
Power-Down Current I
PD
1 2 mA 2, 3, 6
Termination Resistance R
TERM
108 110 112 " 2, 3
Die Thermal Shutdown TS
D
150 °C 2
Power-Down
Termination Capacitance
C
PD
C
14
8pF
pF
2, 3, 6, 7
2, 3, 6, 7, 8
Input Leakage High I
IH
-1.0 µA 2, 12
Input Leakage Low I
IL
1.0 µA 2, 9, 12
Output Current I
O
4mA10
Bus Current Sense
Trip Point
I
BCST
32 mA 11
REGULATOR CHARACTERISTICS (0°C to 70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Output Voltage V
REF
2.79 2.85 2.93 V 2, 3
Drop Out Voltage V
DROP
0.75 1.0 V 4, 7
Line Regulation LI
REG
1.0 2.0 % 2, 5
Load Regulation LO
REG
1.3 3.0 % 2, 3
Current Limit I
L
900 mA 2
Sink Current I
SINK
400 mA 2
