MAX221 MAXIM [Maxim Integrated Products], MAX221 Datasheet - Page 8

• Manufacturer Part Number: MAX221
• Description: +5V, 1uA, Single RS-232 Transceiver with AutoShutdown
• Manufacturer: MAXIM [Maxim Integrated Products]

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1999 Maxim Integrated Products
Figure 5. Transmitter Output Exiting Shutdown or
Powering Up
+5V, 1µA, Single RS-232 Transceiver
with AutoShutdown
Figure 6. Loopback Test Circuit
C1
C2
V
5V/div
5V/div
0V
CC
+5V
0.1 F
FORCEOFF
FORCEON
C1+
C1-
C2+
C2-
TIN
ROUT
EN
50 s/div
MAX221
GND
V
CC
TIN = V
TIN = GND
INVALID
5k
TOUT
RIN
V+
V-
CC
Printed USA
FORCEON =
FORCEOFF
TOUT
C3
C4
1000pF
TRANSISTOR COUNT: 157
Figure 7. Loopback Test Result at 120kbps
Figure 8. Loopback Test Result at 250kbps
___________________Chip Information
is a registered trademark of Maxim Integrated Products.
5V/div
5V/div
5V/div
5V/div
5V/div
5V/div
2 s/div
2 s/div
TIN
TOUT
ROUT
TIN
TOUT
ROUT