DS229 Datasheet, PDF (1/9 Pages) Dallas Semiconductor – Triple RS-232 Transmitter/Receiver

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DS229
Triple RS-232 Transmitter/Receiver
FEATURES
Compatible with DS1229
5V operation
20-pin DIP or SOIC package
20-pin TSSOP package for height restricted
applications
Operate from single +5V power
Meets all EIA-232E and V.28 specifications
Uses small capacitors: 0.1 µF
Optional industrial temperature range
available (-40°C to +85°C)
ORDERING INFORMATION
DS229
20-pin DIP
DS229N 20-pin DIP (Industrial)
DS229S
20-pin SOIC
DS229SN 20-pin SOIC (Industrial)
DS229E
20-pin TSSOP
DS229EN 20-pin TSSOP (Industrial)
PIN ASSIGNMENT
C1+ 1
20
V+ ₂
19
C1- 3
18
C2+ 4
17
C2- 5
16
V- 6
15
T2OUT 7
14
R2IN 8
13
T3OUT 9
12
R3IN 10
11
VCC
GND
T1OUT
R1IN
R1OUT
T1IN
T2IN
R2OUT
T3IN
R3OUT
20-Pin DIP, SOIC AND TSSOP
PIN DESCRIPTION
V_CC
GND
- +5-Volt Supply
- Ground
V+
- Positive Supply Output
V-
- Negative Supply Output
T1_IN, T2_IN, T3_IN
- RS-232 Driver Inputs
T1_OUT, T2_OUT, T3_OUT - RS-232 Driver Outputs
R1_IN, R2_IN, R3_IN
- Receiver Inputs
R1_OUT, R2_OUT, R3_OUT - Receiver Outputs
C1+, C1-
- Capacitor 1 Connections
C2+, C2-
- Capacitor 2 Connections
DESCRIPTION
The DS229 is a triple RS-232 driver/receiver pair that generates RS-232 voltage levels from a single +5-
volt power supply. Additional ±12-volt supplies are not needed since the DS229 uses on-board charge
pumps to convert the +5-volt supply to ±10 volts. The DS229 is fully compliant with EIA RS-232E and
V.28/V.24 standards. The DS229 contains three drivers and three receivers. Driver slew rates and data
rates are guaranteed up to 116 kbits/sec. The DS229 operates with only 0.1 µF charge pump capacitors.
OPERATION
The diagram in Figure 1 shows the main elements of the DS229. The following paragraphs describe the
function of each pin.
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