DS232 Dallas Semiconductor, DS232 Datasheet

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DS232

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

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FEATURES
ORDERING INFORMATION
DS232A
DS232A-N
DS232AR
DS232AR-N 16-pin SOIC (150-Mil) (Industrial)
DS232AS
DS232AS-N 16-pin SOIC (300-Mil) (Industrial)
DS232AE
DS232AE-N 20-pin TSSOP (Industrial)
DESCRIPTION
The DS232A is a dual 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 DS232A uses on-board charge
pumps to convert the +5-volt supply to 10 volts. The DS232A is fully compliant with EIA RS-232E and
V0.28/V0.24 standards. The DS232A contains two drivers and two receivers. Driver slew rates and data
rates are guaranteed up to 250k bits/sec. The DS232A operates with only 0.1 F charge pump capacitors.
OPERATION
The diagram in Figure 1 shows the main elements of the DS232A. The following paragraphs describe the
function of each pin.
www.dalsemi.com
Compatible with LT1181A and MAX232A
High data rate - 250 kbits/sec under load
16-pin DIP or SOIC package
20-pin TSSOP package for height restricted
applications
Operate from single +5V power
Meets all EIA-232E and V0.28 specifications
Uses small capacitors: 0.1 F
Optional industrial temperature range
available (-40 C to +85 C)
16-pin DIP
16-pin DIP (Industrial)
16-pin SOIC (150-Mil)
16-pin SOIC (300-Mil)
20-pin TSSOP
Dual RS-232 Transmitter/Receiver
1 of 10
PIN ASSIGNMENT
PIN DESCRIPTION
V
GND
V+
V-
T1
T1
R1
R1
C1+, C1-
C2+, C2-
CC
IN
OUT
IN
OUT
, T2
, R2
, T2
, R2
IN
IN
OUT
T2
T2
OUT
C1+
R2
C1+
R2
C2+
C2+
C1-
C2-
C1-
C2-
NC
NC
OUT
OUT
V+
V+
V-
16-Pin DIP AND SOIC
V-
IN
IN
20-Pin TSSOP
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
- +5-Volt Supply
- Ground
- Positive Supply Output
- Negative Supply Output
- RS-232 Driver Inputs
- RS-232 Driver Outputs
- Receiver Inputs
- Receiver Outputs
- Capacitor 1 Connections
- Capacitor 2 Connections
16
15
14
13
12
11
10
20
19
18
17
16
15
14
13
12
11
9
V
GND
T1
R1
R1
T1
T2
R2
NC
V
GND
T1
R1
R1
NC
T1
T2
R2
CC
CC
OUT
IN
IN
OUT
IN
IN
IN
OUT
OUT
IN
OUT
OUT
DS232A
112099

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DS232 Summary of contents

Page 1

... Additional 12-volt supplies are not needed since the DS232A uses on-board charge pumps to convert the +5-volt supply to 10 volts. The DS232A is fully compliant with EIA RS-232E and V0.28/V0.24 standards. The DS232A contains two drivers and two receivers. Driver slew rates and data rates are guaranteed up to 250k bits/sec ...

Page 2

... FUNCTIONAL DIAGRAM OF DS232A Figure 1 NOTE recommended decoupling capacitor which is the same value as C1, C2, C3, and C4 Are for TSSOP package only. PIN DESCRIPTIONS V , GND: DC power is provided to the device on these pins V+: Positive supply output (RS-232). V+ requires an external storage charge capacitor of at least 0.1 F. ...

Page 3

... V+. Likewise, C2 can be omitted if -12V is connected directly to V-. DUAL CHARGE PUMP CONVERTERS The DS232A has a two-stage on-board charge pump circuit that is used to generate 10 volts from a single +5-volt supply. In the first stage, capacitor C1 doubles the +5V supply to +10 volts which is then stored on capacitor C3 ...

Page 4

... SYMBOL MIN TYP I 4 CC1 I 15 CC2 ORS V 0.8 1.4 TTL V 1.4 TTH f 250 350 300 10M OUT TSC DS232A ( MAX UNITS NOTES 5 MAX UNITS NOTES 2 bits 100 ...

Page 5

... SR t PHLT t PLHT t PHLR t PLHR t PHLT -t PLHT t PHLR -t PLHR = 2V 1.3 V 1.8 2 0 TYP MAX UNITS NOTES 1.3 3.5 s 1.5 3 300 ns 100 ns DS232A ...

Page 6

... TRANSMITTER PROPAGAION DELAY TIMING Figure 2 RECEIVER PROPAGATION DELAY TIMING Figure DS232A ...

Page 7

... DIP (300-MIL) PKG 16-PIN DIM MIN MAX A IN. 0.740 0.780 MM 18.80 19.81 B IN. 0.240 0.260 MM 6.10 6.60 C IN. 0.120 0.140 MM 3.05 3.56 D IN. 0.300 0.325 MM 7.62 8.26 E IN. 0.015 0.040 MM 0.38 1.02 F IN. 0.120 0.140 MM 3.04 3.56 G IN. 0.090 0.110 MM 2.29 2.79 H IN. 0.320 0.370 MM 8.13 9.40 J IN. 0.008 0.012 MM 0.20 0.30 K IN. 0.015 0.021 MM 0.38 0. DS232A ...

Page 8

... SOIC (150-MIL) PKG 16-PIN DIM MIN MAX A IN. 0.053 0.069 MM 1.35 1.75 A1 IN. 0.004 0.010 MM 0.10 0.25 A2 IN. 0.048 0.062 MM 1.24 1.57 B IN. 0.012 0.020 MM 0.30 0.50 C IN. 0.007 0.011 MM 0.17 0.28 D IN. 0.386 0.393 MM 9.80 9.98 E IN. 0.050 BSC MM 1.27 BSC E1 IN. 0.150 0.158 MM 3.81 4.01 H IN. 0.230 0.244 MM 5.84 6.20 L IN. 0.016 0.050 MM 0.40 0. DS232A ...

Page 9

... DIM MIN MAX A IN. 0.105 0.094 MM 2.39 2.67 A1 IN. 0.004 0.012 MM 0.102 0.30 A2 IN. 0.089 0.095 MM 2.26 2.41 b IN. 0.013 0.020 MM 0.33 0.51 C IN. 0.009 0.013 MM 0.229 0.33 D IN. 0.398 0.412 MM 10.11 10.46 E IN. 0.050 BSC MM 1.27 BSC E1 IN. 0.290 0.300 MM 7.37 7.62 H IN. 0.398 0.416 MM 10.11 10.57 L IN. 0.016 0.040 MM 0.40 1. DS232A ...

Page 10

... TSSOP DIM MIN MAX 1. 0. 0.75 1. 0.09 0. 0.50 0. 0.65 BSC B MM 0.18 0. 6.40 6. 4.40 NOM G MM 0.25 REF H MM 6.25 6.55 phi DS232A ...

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