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DS14C202 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. DS14C202
Description  Low Power 5V Powered EIA/TIA-232 Dual Driver/Receiver
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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DS14C202 Datasheet(HTML) 3 Page - National Semiconductor (TI)

   
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Switching Characteristics (Note 5)
Over recommended operating conditions, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DRIVER CHARACTERISTICS
t
PLH
Propagation Delay Low to High
R
L = 3kΩ
C
L = 50 pF
(
Figure 1)
1.0
4.0
µs
t
PHL
Propagation Delay High to Low
1.0
4.0
µs
t
SK
Skew |t
PLH −tPHL|
0.1
1.0
µs
SR1
Output Slew Rate
R
L = 3kΩ to7kΩ,CL = 50 pF
(Note 7)
4.0
10
30
V/µs
SR2
Output Slew Rate
R
L = 3kΩ to7kΩ,CL = 2500 pF
4.0
10
30
V/µs
RECEIVER CHARACTERISTICS
t
PLH
Propagation Delay Low to High
Input Pulse Width > 10 µs
C
L = 50 pF
(
Figure 2)
2.0
µs
t
PHL
Propagation Delay High to Low
2.0
µs
t
SK
Skew |t
PLH −tPHL|
300
ns
t
r
Output Rise Time
15
ns
t
f
Output Fall Time
15
ns
DATA RATES
f
MAX
Maximum Data Rate
R
L = 3kΩ to7kΩ,CL = 50 pF to 1000 pF (Note 8)
128
TBD
kbps
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 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 speci-
fied. 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 posi-
tive value is designated as maximum. For example, if −6V is a maximum, the typical value of −6.8V is more negative.
Note 3: IOS
+ and I
OS
values are for one output at a time.
Note 4: Receiver AC input waveform for test purposes: tr = tf = 160 ns (10% to 90%), VIH = 3V, VIL = −3V, f = 64 kHz, 50% duty cycle. Driver AC input waveform
for test purposes: tr = tf = 10 ns (10% to 90%), VIH = 3V, VIL = 0V, f = 64 kHz, 50% duty cycle.
Note 5: All typicals are given for VCC = 5.0V, +25˚C.
Note 6: Ratings apply to ambient temperature at +25˚C. Above this temperature derate: N Package TBD and M Package TBD.
Note 7: Slew rate is defined as
∆V/∆t, measured between ±3V level.
Note 8: fMAX criteria is either 60%–40% duty cycle or a waveform that is 13 rise, 13 fall, 13 logic level (driver ±5V and receiver 3.5V/0.4V).
Parameter Measurement Information
DS012622-3
DS012622-4
FIGURE 1. Driver Load Circuit and Switching Waveform (Note 4)
DS012622-5
DS012622-6
tr and tf measured between 20% and 80% of the waveform.
FIGURE 2. Receiver Load Circuit and Switching Waveform (Note 4)
3
www.national.com
PrintDate=1998/06/22 PrintTime=10:23:03 42589 ds012622 Rev. No. 0
cmserv
Proof
3


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