NSC DS14185WMX, DS14185WM Datasheet
DS14185
EIA/TIA-232 3 Driver x 5 Receiver
General Description
The DS14185 is a three driver, five receiver device which
conforms to the EIA/TIA-232-E standard.
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.
Features
n Replaces one 1488 and two 1489s
n Conforms to EIA/TIA-232-E
n 3 drivers and 5 receivers
n Flow through pinout
n Failsafe receiver outputs
n 20-pin SOIC package
n LapLink
®
compatible −200 kbps data rate
Connection Diagram Functional Diagram
LapLink®is a registered trademark of TravellingSoftware.
SOIC
DS011938-1
Order Number DS14185WM
See NS Package M20B
DS011938-2
April 1999
DS14185 EIA/TIA-232 3 Driver x 5 Receiver
© 1999 National Semiconductor Corporation DS011938 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
) +7V
Supply Voltage (V
+
) +15V
Supply Voltage (V
−
) −15V
Driver Input Voltage 0V to V
CC
Driver Output Voltage (Power
Off)
±
15V
Receiver Input Voltage
±
25V
Receiver Output Voltage (R
OUT
) 0VtoV
CC
Maximum Package Power Dissipation@+25˚C
M Package 1488 mW
Derate M Package 11.9 mW/˚C above +25˚C
Storage Temperature Range −65˚C to +150˚C
Lead Temperature Range
(Soldering, 4 seconds) +260˚C
ESD Ratings (HBM, 1.5 kΩ, 100
pF) ≥1.5 kV
Recommended Operating
Conditions
Min Typ Max Units
Supply Voltage (V
CC
) +4.75 +5.0 +5.25 V
Supply Voltage (V
+
) +9.0 +12.0 +13.2 V
Supply Voltage (V
−
) −13.2 −12.0 −9.0 V
Operating Free Air
Temperature (T
A
) 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
I
CC
VCCSupply Current No Load, All Inputs at +5V 21.0 30 mA
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.
V
+
=
9V, V
−
=
−9V 8.7 15 mA
V
+
=
13.2V, V
−
=
−13.2V 13 22 mA
I
−
V−Supply Current
(Note 2)
V
+
=
9V, V
−
=
−9V −12.5 −22 mA
V
+
=
13.2V, V
−
=
−13.2V −16.5 −28 mA
DRIVER CHARACTERISTICS
V
IH
High Level Input Voltage 2.0 V
V
IL
Low Level Input Voltage 0.8 V
I
IH
High Level Input Current V
IN
=
5V 10 µA
(Note 2)
I
IL
Low Level Input Current V
IN
=
0V −1.24 −1.5 mA
(Note 2)
V
OH
High Level Output Voltage R
L
=
3kΩ,V
IN
=
0.8V, 6 7 V
(Note 2) V
+
=
9V, V
−
=
−9V
R
L
=
3kΩ,V
IN
=
0.8V, 8.5 9 V
V
+
=
+12V, V
−
=
−12V
R
L
=
7kΩ,V
IN
=
0.8V, 10 11.5 V
V
+
=
+13.2V, V
−
=
−13.2V
V
OL
Low Level Output Voltage R
L
=
3kΩ,V
IN
=
2V, −7 −6 V
(Note 2) V
+
=
9V, V
−
=
−9V
R
L
=
3kΩ,V
IN
=
2V, −8 −7.5 V
V
+
=
+12V, V
−
=
−12V
R
L
=
7kΩ,V
IN
=
0.8V, −11 −10 V
V
+
=
+13.2V, V
−
=
−13.2V
I
OS
+ Output High Short V
O
=
0V, V
IN
=
0.8V −6 −13 −18 mA
Circuit Current (Note 2)
I
OS
− Output Low Short V
O
=
0V, V
IN
=
2.0V 6 13 18 mA
Circuit Current (Note 2)
R
O
Output Resistance −2V ≤ VO≤ +2V, 300 Ω
V
+
=
V
−
=
V
CC
=
0V
−2V ≤ V
O
≤ +2V, 300 Ω
V
+
=
V
−
=
V
CC
=
Open Ckt
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Electrical Characteristics (Note 2) (Continued)
Over recommended supply voltage and operating temperature ranges, unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Units
RECEIVER CHARACTERISTICS
V
TH
Input High Threshold VO≤ 0.4V, I
O
=
3.2 mA 1.85 2.4 V
(Recognized as a High Signal)
V
TL
Input Low Threshold VO≥ 2.5V, I
O
=
−0.5 mA 0.7 1.0 V
(Recognized as a Low Signal)
R
IN
Input Resistance V
IN
=
±
3V to±15V 3.0 4.1 7.0 kΩ
I
IN
Input Current (Note 2) V
IN
=
+15V 2.1 4.1 5.0 mA
V
IN
=
+3V 0.43 0.7 1 mA
V
IN
=
−15V −5.0 −4.1 −2.1 mA
V
IN
=
−3V −1 −0.65 −0.43 mA
V
OH
High Level Output Voltage I
OH
=
−0.5 mA, V
IN
=
−3V 2.6 4 V
(Note 7) I
OH
=
−10 µA, V
IN
=
−3V 4.0 4.9 V
I
OH
=
−0.5 mA, V
IN
=
Open Circuit 2.6 4 V
I
OH
=
−10 µA, V
IN
=
Open Circuit 4.0 4.9 V
V
OL
Low Level Output Voltage I
OL
=
3.2 mA, V
IN
=
+3V 0.2 0.4 V
I
OSR
Short Circuit Current (Note 2) V
O
=
0V, V
IN
=
0V −4 −2.7 −1.7 mA
Switching Characteristics (Note 2)
T
A
=
25˚C
Symbol Parameter Conditions Min Typ Max Units
DRIVER CHARACTERISTICS
t
PHL
Propagation Delay High to Low R
L
=
3kΩ,C
L
=
50 pF
(
Figures 1, 2
)
60 350 ns
t
PLH
Propagation Delay Low to High 240 350 ns
t
r,tf
Output Slew Rate (Note 8) 50 ns
RECEIVER CHARACTERISTICS
t
PHL
Propagation Delay High to Low R
L
=
1.5 kΩ,C
L
=
15 pF
(includes fixture plus probe),
(
Figures 3, 4
)
150 350 ns
t
PLH
Propagation Delay Low to High 240 350 ns
t
r
Rise Time 87 175 ns
t
f
Fall Time 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: V
CC
=
+5.0V, V
+
=
+12.0V, V
−
=
−12V, T
A
=
+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), t
r
=
t
f
<
10 ns, V
IH
=
3V, V
IL
=
0V, duty cycle=50%.
Note 6: Generator characteristics for receiver input: f=64 kHz (128 kbits/sec), t
r
=
t
f
=
200 ns, V
IH
=
3V, V
IL
=
−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 V
CC
or GND. Slew rate is determined by load capacitance. Tocomply with a 30 V/µs maximum slew rate, a minimum load capacitance of 390 pF is recommended.
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