If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)
V+ Pin
V− Pin
Driver Input Voltage
Driver Output Voltage
Receiver Input Voltage
Receiver Output Voltage
Junction Temperature
WM Package
−0.3V to +6V
(V
CC
−0.3V) to +15V
+0.3V to −15V
−0.3V to (V
CC
+0.3V)
(V+ +0.3V) to (V−
−0.3V)
Recommended Operating
Conditions
Min
Supply Voltage, V
CC
DS14C238
4.5
0
Operating Free Air Temp. (T
A
)
+70
˚C
Max
5.5
Units
V
±
30V
−0.3V to (V
CC
+0.3V)
+150˚C
1400 mW
Maximum Package Power Dissipation
@
+25˚C (Note 6)
Electrical Characteristics
(Note 2)
Over recommended operating conditions, unless otherwise specified.
Symbol
V+
V−
I
CC
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
I
OS
+
I
OS
−
R
O
V
TH
V
TL
V
HY
R
IN
I
IN
Parameter
Positive Power Supply
Negative Power Supply
Supply Current (V
CC
)
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Output Voltage
Low Level Output Voltage
Output High Short
Circuit Current
Output Low Short
Circuit Current
Output Resistance
Input High Threshold Voltage
Input Low Threshold Voltage
Hysteresis
Input Resistance
Input Current
V
IN
= +15V
V
IN
= +3V
V
IN
= −3V
V
IN
= −15V
V
OH
V
OL
High Level Output Voltage
Low Level Output Voltage
V
IN
= −3V, I
O
= −3.2 mA
V
IN
= −3V, I
O
= −20 µA
V
IN
= +3V, I
O
= +2.0 mA
0.8
0.2
3.0
2.14
0.43
−1.0
−5.0
3.5
4.0
−2V
≤
V
O
≤
+2V, V
CC
= GND = 0V
300
1.9
1.5
0.4
4.5
3.8
0.6
−0.6
−3.8
4.5
4.9
0.25
0.4
1.0
7.0
5.0
+1.0
−0.43
−2.14
2.4
Ω
V
V
V
kΩ
mA
mA
mA
mA
V
V
V
RECEIVER CHARACTERISTICS
V
O
= 0V, V
IN
= 2.0V
5.0
12
30
mA
V
O
= 0V, V
IN
= 0.8V
(Note 3)
−30
V
IN
≥
2.0V
V
IN
≤
0.8V
R
L
= 3 kΩ
Conditions
R
L
= 3 kΩ, C1–C4 = 1.0 µF, D
IN
= 0.8V
R
L
= 3 kΩ, C1–C4 = 1.0 µF, D
IN
= 2.0V
No Load
2.0
GND
−10
−10
5.0
7.4
−6.3
−15
−5.0
−5.0
Min
Typ
9.0
−8.0
7.0
10
V
CC
0.8
+10
+10
Max
Units
V
V
mA
V
V
µA
µA
V
V
mA
DEVICE CHARACTERISTICS
DRIVER CHARACTERISTICS
www.national.com
2
DS14C238
Switching Characteristics
(Note 4)
Over recommended operating conditions, unless otherwise specified.
Symbol
t
PLH
t
PHL
t
sk
SR1
SR2
t
PLH
t
PHL
t
SK
t
NW
Parameter
Propagation Delay LOW to HIGH
Propagation Delay HIGH to LOW
Skew |t
PLH
–t
PHL
|
Output Slew Rate
Output Slew Rate
Propagation Delay LOW to HIGH
Propagation Delay HIGH to LOW
Skew | t
PLH
–t
PHL
|
Noise Pulse Width Rejected
R
L
= 3 kΩ
C
L
= 50 pF
(Figures
1, 2)
R
L
= 3kΩ to 7 kΩ, C
L
= 50 pF
R
L
= 3 kΩ, C
L
= 2500 pF
Input Pulse Width
>
10 µs
C
L
= 50 pF
(Figures
3, 4)
(Figures
3, 4)
4.0
3.0
Conditions
Min
Typ
0.7
0.6
0.1
15
5.0
2.0
2.8
0.8
2.5
6.5
6.5
2.0
1.0
Max
4.0
4.0
1.0
30
Units
µs
µs
µs
V/µs
V/µs
µs
µs
µs
µs
DRIVER CHARACTERISTICS
RECEIVER CHARACTERISTICS
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 tables of “Electrical Characteristics” specify conditions for 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.
Note 3:
I
OS
+ and I
OS
− values are for one output at a time. If more than one output is shorted simultaneously, the device power dissipation may be exceeded.
Note 4:
Receiver AC input waveform for test purposes: t
r
= t
f
= 200 ns, V
IH
= 3V, V
IL
= −3V, f = 64 kHz (128 kbits/sec). Driver AC input waveform for test purposes:
t
r
= t
f
≤
10 ns, V
IH
= 3V, V
IL
= 0V, f = 64 kHz (128 kbits/sec).
Note 5:
All typicals are given for V
CC
= 5.0V and T
A
= +25˚C.
Note 6:
Ratings apply to ambient temperature at +25˚C. Above this temperature derate: WM package 13.5 mW/˚C.
Parameter Measurement Information
01128204
FIGURE 1. Driver Load Circuit
01128205
FIGURE 2. Driver Switching Waveform
01128206
FIGURE 3. Receiver Load Circuit
3
www.national.com
DS14C238
Parameter Measurement Information
(Continued)
01128207
FIGURE 4. Receiver Propagation Delays and Noise Rejection
Pin Descriptions
V
CC
(pin 9) —
Power supply pin for the device,
+5V (
±
10%).
V+ (pin 11) —
Positive supply for TIA/EIA-232-E drivers. Recommended external capacitor: C4 = 1.0 µF (6.3V). This supply is not
intended to be loaded externally.
V− (pin 15) —
Negative supply for TIA/EIA-232-E drivers. Recommended external capacitor: C3 = 1.0 µF (16V). This supply is not
What is the difference between triode and MOS tube when used as switches?What is the difference between triode and MOS tube when used as switches?1. Working nature: triodes are controlled by current, ...
[i=s]This post was last edited by qwqwqw2088 on 2021-2-17 08:58[/i]The Type 81 (102D) electronic tube transceiver used by the Chinese People's Volunteer Army to Resist U.S. Aggression and Aid KoreaThe...
The distance between the two pins of the TO92S package is 0.8mm. It worked normally within a month at first, but was later found to be short-circuited. How can I check the current flow path between th...
I want to use the new Embest em-stm3210e development board to replace a suitable board to play with. I bought it in January 2010. I was eager to learn STM32 development. I am not a professional, and t...
introduction
Bluetooth technology is a short-range wireless communication technology designed to replace wired cables. It is a wireless communication technology standard developed by the SIG, ...[Details]
The jammer is a signal blocker, mainly composed of a chip and a radio transmitter. When the car owner presses the remote control lock button, the jammer interferes with the electronic lock receivin...[Details]
In the summer of 2025, BlueOval SK, a joint venture between Ford and SK On, officially started production at its first battery factory in Kentucky.
According to the original plan, this w...[Details]
In June 2014, the Ministry of Industry and Information Technology issued 4G FD-LTE licenses to China Unicom and China Telecom. Together with the 4G TD-LTE licenses issued to China Mobile, China Uni...[Details]
The practice of warming up a car originated with gasoline-powered vehicles. Warming up the engine allows it to enter a better working state and ensures good lubrication. This has become a habit for...[Details]
Magna's integrated in-cabin perception system fuses vision and millimeter-wave radar data to detect the presence of passengers, identify stranded children, monitor driver fatigue and vital signs, a...[Details]
Over the past decade, the narrative surrounding fuel vehicles has been one of decline and replacement. Under the onslaught of new energy vehicles, traditional automakers have been forced to acceler...[Details]
Electric vehicles will revolutionize transportation, changing fuel consumption, carbon emissions, costs, maintenance, and driving habits. Currently, a major selling point for electric vehicles is t...[Details]
introduction
With the development of society, people's requirements for the quality of refrigerated and frozen foods are constantly improving. The changes in food appearance and nutritional co...[Details]
Analog Devices held a third-quarter fiscal 2025 earnings conference call. Vincent T. Roche, CEO and Chairman of the Board, and Richard C. Puccio, Executive Vice President and Chief Financial Office...[Details]
For self-driving cars, LiDAR is the sensory organ that allows them to "see the road." Simply put, its operating principle involves sending out a laser beam, receiving the echo, and ultimately gener...[Details]
Most cameras on the market use chips manufactured by Japanese companies like Sony, Sharp, Panasonic, and LG. South Korea now has the capability to produce chips, but the quality is somewhat inferio...[Details]
I believe everyone has heard of memory. If your computer is slow, your experts may recommend upgrading it to a larger capacity. But what exactly is computer memory used for? Why does memory capacit...[Details]
New energy electric vehicles are energy-saving, environmentally friendly, have low operating costs, and enjoy strong support from national policies. With the growth in sales of new energy electric ...[Details]
With the rapid development of the automotive industry, automotive requirements for control, communication, and network management are becoming increasingly stringent. Hardware platforms based on 32...[Details]
Power technology
京公网安备 11010802033920号
EEWORLD
