CLM1117
CORPORATION
ACTIVE VS PASSIVE TERMINATION
The improvement in noise immunity and low quiescent power
of the terminator of less than 1W is the key advantage of
active termination compared to passive termination. The
CLM1117 significantly improves the noise level and signals on
the bus by the terminating point due to variations in voltage at
the termination point due to variation in the Vterm power line.
Another advantage of active termination is the improvement in
the impedance matching. The low impedance of the device
makes the termination resistance more closely matched to the
impedance of the cable. This improvement increases the
data rate by 10 times, from 1mbyte/s to 10mbyte/s. The
CLM1117 increases the protection and the reliability of the
application since it features internal current limiting,
overvoltage protection, and thermal protection.
ACTIVE TERMINATION CONFIGURATION
5V
IN5817
TERMPWR
5V
IN5817
2.85V
+
2.85V
+
110K
Ω
110KΩ
6 METERS MAX
110KΩ
CLM1117-2.85
CLM1117-2.85
+
+
10
µF
10
µ
F
10
µF
10µF
UP TO 27 LINES
110K
110K
Ω
Ω
6 METERS MAX
110KΩ
1N-15
Information furnished by Calogic is believed to be accurate and reliable. However, no responsibility is assumed for its use: nor for any infringement of patents or other
rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic.
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CALOGIC [ CALOGIC, LLC ]
