DS232 Dallas Semiconductor, DS232 Datasheet - Page 2

• Manufacturer Part Number: DS232
• Description: Dual Rs-232 Transmitter/receiver
• Manufacturer: Dallas Semiconductor

FUNCTIONAL DIAGRAM OF DS232A Figure 1
NOTE: C5 is a recommended decoupling capacitor which is the same value as C1, C2, C3, and C4.
( ) Are for TSSOP package only.
PIN DESCRIPTIONS
V
V+: Positive supply output (RS-232). V+ requires an external storage charge capacitor of at least 0.1 F.
A larger capacitor (up to 10 F) can be used to reduce supply ripple.
V-: Negative supply output (RS-232). V- requires an external storage capacitor of at least 0.1 F. A
larger capacitor (up to 10 F) can be used to reduce supply ripple.
T1
unconnected since each input has a 400 k pullup resistor.
T1
3 k . These driver outputs provide current necessary to meet RS-232 levels for loads up to 2500 pF.
CC
IN
OUT
, GND: DC power is provided to the device on these pins. V
, T2
, T2
IN
OUT
: Standard TTL/CMOS inputs for the RS-232 drivers. The inputs of unused drivers can be left
: Driver outputs at RS-232 levels. Driver output swing meets RS-232 levels for loads up to
2 of 10
CC
is the +5-volt input.
DS232A