NSC DS14C241WMX, DS14C241WM Datasheet
DS14C241
Single Supply TIA/EIA-2324x5Driver/Receiver
General Description
The DS14C241 is four driver,fivereceiverdevicewhichconforms totheTIA/EIA-232-Estandard and CCITT V.28recommendations. This device eliminates
±
12V supplies by employing an internal DC–DC converter to generate the
necessary output levels from a single +5V supply. Driver
slew rate control and receiver noise filtering have also been
internalized to eliminate the need for external slew rate control and noise filtering capacitors. With the addition of TRISTATE
®
receiver outputs and a shutdown mode, device
power consumption is kept to a minimum.
Features
n Conforms to TIA/EIA-232-E and CCITT V.28
n Internal DC–DC converter
n Operates with single +5V supply
n Low power requirement— I
CC
10 mA max
n Shutdown mode—I
CX
10 µA max
n Internal driver slew rate control
n Receiver noise filtering
n Operates above 120 kbits/sec
n TRI-STATE receiver outputs
n Direct replacement for MAX241
Connection Diagram Functional Diagram
TRI-STATE®is a registered trademark of National Semiconductor Corporation.
DS011281-1
Order Number DS14C241WM
See NS Package Number M28B
DS011281-2
May 1998
DS14C241 Single Supply TIA/EIA-2324x5Driver/Receiver
© 1998 National Semiconductor Corporation DS011281 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
) −0.3V to +6V
V
+
Pin (VCC− 0.3V) to +15V
V
−
Pin +0.3V to −15V
Driver Input Voltage −0.3V to (V
CC
+ 0.3V)
Driver Output Voltage (V
+
+ 0.3V) to (V−− 0.3V)
Receiver Input Voltage
±
30V
Receiver Output Voltage −0.3V to (V
CC
+ 0.3V)
Junction Temperature +150˚C
Maximum Package Power Dissipation
@
+25˚C (Note 6)
WM Package 1520 mW
Storage Temperature Range −65˚C to +150˚C
Lead Temperature (Soldering, 4
sec.) +260˚C
Short Circuit Duration (D
OUT
) continuous
ESD Rating (HBM, 1.5 kΩ, 100
pF) ≥ 2.0 kV
Recommended Operating
Conditions
Min Max Units
Supply Voltage (V
CC
) 4.5 5.5 V
Operating Free Air Temp. (T
A
)
DS14C241 0 +70 ˚C
Electrical Characteristics (Note 2)
Over recommended operating conditions, unless otherwise specified
Symbol Parameter Conditions Min Typ Max Units
DEVICE CHARACTERISTICS
V
+
Positive Power Supply RL=3kΩ, C1–C4 = 1.0 µF, DIN= 0.8V 9.0 V
V
−
Negative Power Supply RL=3kΩ, C1–C4 = 1.0 µF, DIN= 2.0V −8.0 V
I
CC
Supply Current (VCC) No Load 8.5 10 mA
I
CX
Supply Current Shutdown RL=3kΩ,SD=V
CC
1.0 10 µA
V
IH
High Level Enable Voltage SD 2.4 V
CC
V
V
IL
Low Level Enable Voltage GND 0.8 V
I
IH
High Level Enable Current −10 +10 µA
I
IL
Low Level Enable Current −10 +10 µA
DRIVER CHARACTERISTICS
V
IH
High Level Input Voltage D
IN
2.0 V
CC
V
V
IL
Low Level Input Voltage GND 0.8 V
I
IH
High Level Input Current VIN≥ 2.0V −10 +10 µA
I
IL
Low Level Input Current VIN≤ 0.8V −10 +10 µA
V
OH
High Level Output Voltage RL=3kΩ 5.0 7.5 V
V
OL
Low Level Output Voltage −6.5 −5.0 V
I
OS
+ Output High Short Circuit Current VO= 0V, VIN= 0.8V −30 −15 −5.0 mA
I
OS
− Output Low Short Circuit Current VO= 0V, VIN= 2.0V 5.0 12 30 mA
R
O
Output Resistance −2V ≤ VO≤ +2V, VCC= GND = 0V 300 Ω
RECEIVER CHARACTERISTICS
V
TH
Input High Threshold Voltage 1.9 2.4 V
V
TL
Input Low Threshold Voltage 0.8 1.5 V
V
HY
Hysteresis 0.2 0.4 1.0 V
R
IN
Input Resistance 3.0 4.5 7.0 kΩ
I
IN
Input Current VIN= +15V 2.14 3.8 5.0 mA
V
IN
= +3V 0.43 0.6 1.0 mA
V
IN
= −3V −1.0 −0.6 −0.43 mA
V
IN
= −15V −5.0 −3.8 −2.14 mA
V
OH
High Level Output Voltage VIN= −3V, IO= −3.2 mA 3.5 4.6 V
V
IN
= −3V, IO= −20 µA 4.0 4.9 V
V
OL
Low Level Output Voltage VIN= +3V, IO= +2.0 mA 0.25 0.4 V
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Electrical Characteristics (Note 2) (Continued)
Over recommended operating conditions, unless otherwise specified
Symbol Parameter Conditions Min Typ Max Units
RECEIVER CHARACTERISTICS
V
IH
High Level Input Voltage EN 2.0 V
CC
V
V
IL
Low Level Input Voltage GND 0.8 V
I
IH
High Level Input Current VIN≥ 2.0V −10 +10 µA
I
IL
Low Level Input Current VIN≤ 0.8V −10 +10 µA
I
OZ
Output Leakage Current EN = VCC,0V≤R
OUT
≤ V
CC
−10 +10 µA
Switching Characteristics (Note 4)
Over recommended operating conditions, unless otherwise specified
Symbol Parameter Conditions Min Typ Max Units
DRIVER CHARACTERISTICS
t
PLH
Propagation Delay LOW to HIGH RL=3kΩ 0.7 4.0 µs
t
PHL
Propagation Delay HIGH to LOW CL= 50 pF 0.6 4.0 µs
t
SK
Skew |t
PLH–tPHL
|(
Figures 1, 2
) 0.1 1.0 µs
SR1 Output Slew Rate R
L
=3kΩto7kΩ,CL= 50 pF 4.0 15 30 V/µs
SR2 Output Slew Rate R
L
=3kΩ,CL= 2500 pF 3.0 5.0 V/µs
RECEIVER CHARACTERISTICS
t
PLH
Propagation Delay LOW to HIGH Input Pulse Width>10 µs
C
L
=50pF
(
Figures 3, 4
)
2.0 6.5 µs
t
PHL
Propagation Delay HIGH to LOW 2.8 6.5 µs
t
SK
Skew |t
PLH–tPHL
| 0.8 2.0 µs
t
PLZ
(
Figures 5, 7
) 0.1 2.0 µs
t
PZL
0.6 2.0 µs
t
PHZ
(
Figures 5, 6
) 0.2 2.0 µs
t
PZH
0.6 2.0 µs
t
NW
Noise Pulse Width Rejected (
Figures 3, 4
) 2.5 1.0 µs
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: Currentinto 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 IOS− 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=tf
= 200 ns, VIH=3V,VIL=−3V,f=64kHz(128 kbits/sec). Driver AC input waveform for test purposes:
t
r=tf
≤10 ns, VIH=3V,VIL=0V,f=64kHz(128 kbits/sec).
Note 5: All typicals are given for V
CC
= 5.0V and TA= +25˚C.
Note 6: Ratings apply to ambient temperature at +25˚C. Above this temperature derate: WM package 14.3 mW/˚C.
Parameter Measurement Information
DS011281-4
FIGURE 1. Driver Load Circuit
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