MAX220C View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX220C Datasheet PDF : 36 Pages
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+5V-Powered, Multichannel RS-232
Drivers/Receivers
+3V
INPUT
0V
OUTPUT
tPLHT
V+
0V
V-
tPHLT
0V*
INPUT
+3V
50%
OUTPUT
50%
tPHLR
tPHLS
*EXCEPT FOR R2 ON THE MAX243
WHERE -3V IS USED.
50%
VCC
50%
GND
tPLHR
tPLHS
Figure 1. Transmitter Propagation-Delay Timing
Figure 2. Receiver Propagation-Delay Timing
EN
RX IN
a) TEST CIRCUIT
EN INPUT
RECEIVER
OUTPUTS
RX OUT 1kΩ
RX
VCC - 2V
150pF
+3V
0V
EN
OUTPUT ENABLE TIME (tER)
+3.5V
+0.8V
b) ENABLE TIMING
0V
EN INPUT
VOH
RECEIVER
OUTPUTS
VOL
c) DISABLE TIMING
+3V
EN
OUTPUT DISABLE TIME (tDR)
VOH - 0.5V
VCC - 2V
VOL + 0.5V
+3V
SHDN
V+
V-
0V
OUTPUT DISABLE TIME (tDT)
+5V
0V
-5V
a) TIMING DIAGRAM
1 OR 0
TX
b) TEST CIRCUIT
3kΩ
50pF
Figure 3. Receiver-Output Enable and Disable Timing
Figure 4. Transmitter-Output Disable Timing
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