NSC DS14185WM

DS14185
EIA/TIA-232
3 Driver x 5 Receiver
General Description
Features
The DS14185 is a three driver, five receiver device which
conforms to the EIA/TIA-232-E standard.
n
n
n
n
n
n
n
The flow-through pinout facilitates simple non-crossover
board layout. The DS14185 provides a one-chip solution for
the common 9-pin serial RS-232 interface between data terminal and data communications equipment.
Connection Diagram
Replaces one 1488 and two 1489s
Conforms to EIA/TIA-232-E
3 drivers and 5 receivers
Flow through pinout
Failsafe receiver outputs
20-pin SOIC package
LapLink ® compatible −200 kbps data rate
Functional Diagram
SOIC
DS011938-1
Order Number DS14185WM
See NS Package M20B
DS011938-2
LapLink ® is a registered trademark of Travelling Software.
© 1999 National Semiconductor Corporation
DS011938
www.national.com
DS14185 EIA/TIA-232 3 Driver x 5 Receiver
April 1999
Absolute Maximum Ratings (Note 1)
Storage Temperature Range
Lead Temperature Range
(Soldering, 4 seconds)
ESD Ratings (HBM, 1.5 kΩ, 100
pF)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (VCC)
+7V
+15V
Supply Voltage (V+)
−15V
Supply Voltage (V−)
Driver Input Voltage
0V to VCC
Driver Output Voltage (Power
± 15V
Off)
± 25V
Receiver Input Voltage
0V to VCC
Receiver Output Voltage (ROUT)
Maximum Package Power Dissipation @ +25˚C
M Package
1488 mW
Derate M Package
11.9 mW/˚C above +25˚C
−65˚C to +150˚C
+260˚C
≥1.5 kV
Recommended Operating
Conditions
Supply Voltage (VCC)
Supply Voltage (V+)
Supply Voltage (V−)
Operating Free Air
Temperature (TA)
Min
+4.75
+9.0
−13.2
Typ
+5.0
+12.0
−12.0
Max
+5.25
+13.2
−9.0
Units
V
V
V
0
25
70
˚C
Electrical Characteristics (Note 2)
Over recommended supply voltage and operating temperature ranges, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DEVICE CHARACTERISTICS
ICC
VCC Supply Current
No Load, All Inputs at +5V
I+
V+ Supply Current
(Note 2)
I−
V− Supply Current
(Note 2)
No Load, All Driver
Inputs at 0.8V or +2V
All Receiver Inputs
at 0.8V or 2.4V.
21.0
30
mA
8.7
15
mA
V+ = 9V, V− = −9V
V+ = 13.2V, V− = −13.2V
V+ = 9V, V− = −9V
13
22
mA
−12.5
−22
mA
V+ = 13.2V, V− = −13.2V
−16.5
−28
mA
DRIVER CHARACTERISTICS
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
IIH
High Level Input Current
2.0
V
VIN = 5V
0.8
V
10
µA
−1.5
mA
(Note 2)
IIL
Low Level Input Current
VIN = 0V
−1.24
(Note 2)
VOH
High Level Output Voltage
(Note 2)
VOL
Low Level Output Voltage
(Note 2)
RL = 3 kΩ, VIN = 0.8V,
V+ = 9V, V− = −9V
RL = 3 kΩ, VIN = 0.8V,
V+ = +12V, V− = −12V
RL = 7 kΩ, VIN = 0.8V,
V+ = +13.2V, V− = −13.2V
RL = 3 kΩ, VIN = 2V,
V+ = 9V, V− = −9V
6
7
V
8.5
9
V
10
11.5
V
RL = 3 kΩ, VIN = 2V,
V+ = +12V, V− = −12V
RL = 7 kΩ, VIN = 0.8V,
IOS+
Output High Short
−7
−6
V
−8
−7.5
V
−11
−10
V
V+ = +13.2V, V− = −13.2V
VO = 0V, VIN = 0.8V
−6
−13
−18
mA
VO = 0V, VIN = 2.0V
6
13
18
mA
−2V ≤ VO ≤ +2V,
V+ = V− = VCC = 0V
300
Ω
−2V ≤ VO ≤ +2V,
V+ = V− = VCC = Open Ckt
300
Ω
Circuit Current (Note 2)
IOS−
Output Low Short
Circuit Current (Note 2)
RO
Output Resistance
www.national.com
2
Electrical Characteristics (Note 2)
(Continued)
Over recommended supply voltage and operating temperature ranges, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
1.85
2.4
V
RECEIVER CHARACTERISTICS
VTH
Input High Threshold
VO ≤ 0.4V, IO = 3.2 mA
(Recognized as a High Signal)
VTL
Input Low Threshold
VO ≥ 2.5V, IO = −0.5 mA
0.7
1.0
VIN = ± 3V to ± 15V
VIN = +15V
VIN = +3V
3.0
4.1
7.0
kΩ
2.1
4.1
5.0
mA
mA
V
(Recognized as a Low Signal)
RIN
Input Resistance
IIN
Input Current (Note 2)
VOH
High Level Output Voltage
(Note 7)
0.43
0.7
1
VIN = −15V
VIN = −3V
IOH = −0.5 mA, VIN = −3V
IOH = −10 µA, VIN = −3V
−5.0
−4.1
−2.1
mA
−0.65 −0.43
mA
−4
VOL
Low Level Output Voltage
IOH = −0.5 mA, VIN = Open Circuit
IOH = −10 µA, VIN = Open Circuit
IOL = 3.2 mA, VIN = +3V
IOSR
Short Circuit Current (Note 2)
VO = 0V, VIN = 0V
−1
2.6
4
V
4.0
4.9
V
2.6
4
V
4.0
4.9
V
0.2
0.4
V
−2.7
−1.7
mA
Switching Characteristics (Note 2)
TA = 25˚C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DRIVER CHARACTERISTICS
tPHL
Propagation Delay High to Low
tPLH
Propagation Delay Low to High
tr, tf
Output Slew Rate (Note 8)
RL = 3 kΩ, CL = 50 pF
(Figures 1, 2)
60
350
ns
240
350
ns
50
ns
RECEIVER CHARACTERISTICS
tPHL
Propagation Delay High to Low
tPLH
Propagation Delay Low to High
tr
Rise Time
tf
Fall Time
RL = 1.5 kΩ, CL = 15 pF
(includes fixture plus probe),
(Figures 3, 4)
150
350
ns
240
350
ns
87
175
ns
40
100
ns
Note 1: Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of Electrical Characteristics specifies conditions of device operation.
Note 2: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground unless otherwise specified. For current, minimum and maximum values are specified as an absolute value and the sign is used to indicate direction. For voltage logic levels, the more positive value is designated as maximum. For example, if −6V is a maximum, the typical value (−6.8V) is more negative.
Note 3: All typicals are given for: VCC = +5.0V, V+ = +12.0V, V− = −12V, TA = +25˚C.
Note 4: Only one driver output shorted at a time.
Note 5: Generator characteristics for driver input: f = 64 kHz (128 kbits/sec), tr = tf < 10 ns, VIH = 3V, VIL = 0V, duty cycle = 50%.
Note 6: Generator characteristics for receiver input: f = 64 kHz (128 kbits/sec), tr = tf = 200 ns, VIH = 3V, VIL = −3V, duty cycle = 50%.
Note 7: If receiver inputs are unconnected, receiver output is a logic high.
Note 8: Refer to typical curves. Driver output slew rate is measured from the +3.0V to the −3.0V level on the output waveform. Inputs not under test are connected
to VCC or GND. Slew rate is determined by load capacitance. To comply with a 30 V/µs maximum slew rate, a minimum load capacitance of 390 pF is recommended.
3
www.national.com
Parameter Measurement Information
DS011938-3
FIGURE 1. Driver Propagation Delay and Transition Time Test Circuit (Note 5)
DS011938-4
FIGURE 2. Driver Propagation Delay and Transition Time Waveforms Slew Rate (SR) = 6V/(tr or tf)
DS011938-5
FIGURE 3. Receiver Propagation Delay and Transition Time Test Circuit (Note 6)
DS011938-6
FIGURE 4. Receiver Propagation Delay and
Transition Time Waveform
Pin Descriptions
Pin #
13, 15, 16
5, 6, 8
2, 3, 4, 7, 9
www.national.com
Name
Description
DIN
Driver Input Pins
DOUT
Driver Output Pins, RS-232 Levels
RIN
Receiver Input Pins, RS-232 Levels
12, 14, 17, 18, 19
ROUT
Receiver Output Pins
11
GND
Ground
1
V+
Positive Power Supply Pin (+9.0 ≤ V+ ≤ +13.2)
4
Pin Descriptions
(Continued)
Pin #
Name
Description
10
V−
Negative Power Supply Pin (−9.0 ≤ V− ≤ −13.2)
20
VCC
Positive Power Supply Pin (+5V ± 5%)
Applications Information
LapLink COMPATIBILITY
In a typical Data Terminal Equipment (DTE) to Data
Circuit-Terminating Equipment (DCE) 9-pin de-facto interface implementation, 2 data lines and 6 control lines are required. The data lines are TXD and RXD. The control lines
are RTS, DTR, DSR, DCD, CTS, and RI.
The DS14185 is a 3 x 5 Driver/Receiver and offers a single
chip solutuion for this DTE interface. As shown in Figure 5,
this interface allows for direct flow-thru interconnect. For a
more conservative design, the user may wish to insert
ground traces between the signal lines to minimize cross
talk.
The DS14185 can easily provide 128 kbps data rate under
maximum driver load conditions of CL = 2500 pF and RL = 3
kΩ, while power supplies are:
VCC = 4.75V, V+ = 10.8V, V− = −10.8V
MOUSE DRIVING
A typical mouse can be powered from the drivers. Two driver
outputs connected in parallel and set to VOH can be used to
supply power to the V+ pin of the mouse. The third driver output is set to VOL to sink the current from the V− terminal. Refer to typical curves of VOUT/IOUT.Typical mouse specifications are:
10 mA at +6V
5 mA at −6V
DS011938-7
FIGURE 5. Typical DTE Application
5
www.national.com
Typical Performance Characteristics
DS011938-8
DS011938-9
The above input waveforms were used to generate all Typical AC Characteristics.
Driver Output Slew Rate between +3V and −3V
vs Load Capacitance
Conditions: VCC = 5V, RL = 5 kΩ, TA = 25˚C,
fIN = 64 kHz Square Wave
Driver Output Voltage vs Frequency and CL
Conditions: VCC = 5V, RL = 5 kΩ, TA = 25˚C
DS011938-16
DS011938-15
Supply Current vs Frequency and Driver CL
Supply Current vs Frequency and Driver CL
DS011938-13
www.national.com
DS011938-17
6
Typical Performance Characteristics
(Continued)
Supply Current vs Frequency
Driver Output Current vs Output Voltage
DS011938-18
DS011938-19
7
www.national.com
DS14185 EIA/TIA-232 3 Driver x 5 Receiver
Physical Dimensions
inches (millimeters) unless otherwise noted
Small Outline Package
Order Number DS14185WM
NS Package M20B
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: [email protected]
www.national.com
National Semiconductor
Europe
Fax: +49 (0) 1 80-530 85 86
Email: [email protected]
Deutsch Tel: +49 (0) 1 80-530 85 85
English Tel: +49 (0) 1 80-532 78 32
Français Tel: +49 (0) 1 80-532 93 58
Italiano Tel: +49 (0) 1 80-534 16 80
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
Email: [email protected]
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.