Datasheet

__________Applications Information
Charge-Pump Capacitor Selection
Normally, 0.1µF capacitors can be used for all loca-
tions. To reduce output ripple, increase the values of
the V+ and V- capacitors. If your capacitors have a
very wide tolerance, consider using a nominal value a
little larger than 0.1µF to ensure that the actual capaci-
tance does not fall below about 80nF. For circuits
designed to operate over a wide range of tempera-
tures, consider using slightly larger capacitors to com-
pensate for any loss of capacitance at temperature
extremes. No advantage is gained by using values
larger than 10µF.
Power-Supply Decoupling
Use a capacitor with the same value as the charge-
pump capacitors.
6 _______________________________________________________________________________________
MAX563
+3.3V-Powered, EIA/TIA-562 Dual Transceiver
with Receivers Active in Shutdown
V
CC
- 0.6V
EN
INPUT
t
ER
0.5V
CC
RECEIVER
OUTPUT
C
L
= 150pF
RECEIVER
OUTPUTS
t
DR
V
OH
- 0.1V
V
OL
+ 0.1V
R
L =
1kΩ
+0.4V
0V
V
CC
V
CC
EN
INPUT
0V
+3V
0V
V+
V-
+3.7V
-3.7V
0V
1 OR 0
T
X
3k 50pF
A. TIMING DIAGRAM
B. TEST CIRCUIT
t
DT
SHDN
Figure 4. Receiver Output Enable and Disable Timing
Figure 5. Transmitter Output Disable Timing