DS14C238WM National Semiconductor, DS14C238WM Datasheet - Page 3

• Manufacturer Part Number: DS14C238WM
• Manufacturer: National Semiconductor

Specifications of DS14C238WM

• Data Rate: 120Kbps
• Interface Circuit Standard 1: EIA/TIA-232-E/V.28
• Number Of Receivers: 4
• Number Of Transmitters: 4
• Number Of Transceivers: 1
• Data Transmission Topology: Point-to-Point
• Receiver Signal Type: Single-Ended
• Transmitter Signal Type: Single-Ended
• Single Supply Voltage (typ): 5V
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Supply Current: 10mA
• Power Supply Requirement: Single
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 24
• Package Type: SOIC W
• Lead Free Status / Rohs Status: Not Compliant

DRIVER CHARACTERISTICS
t
t
t
SR1
SR2
RECEIVER CHARACTERISTICS
t
t
t
t
PLH
PHL
sk
PLH
PHL
SK
NW
Symbol
Switching Characteristics
Over recommended operating conditions, unless otherwise specified.
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
Note 4: Receiver AC input waveform for test purposes: t
t
Note 5: All typicals are given for V
Note 6: Ratings apply to ambient temperature at +25˚C. Above this temperature derate: WM package 13.5 mW/˚C.
Parameter Measurement Information
r
= t
f
≤ 10 ns, V
OS
+ and I
Propagation Delay LOW to HIGH
Propagation Delay HIGH to LOW
Skew |t
Output Slew Rate
Output Slew Rate
Propagation Delay LOW to HIGH
Propagation Delay HIGH to LOW
Skew | t
Noise Pulse Width Rejected
IH
= 3V, V
OS
− values are for one output at a time. If more than one output is shorted simultaneously, the device power dissipation may be exceeded.
PLH
PLH
IL
= 0V, f = 64 kHz (128 kbits/sec).
–t
–t
Parameter
PHL
PHL
CC
|
|
= 5.0V and T
A
= +25˚C.
FIGURE 2. Driver Switching Waveform
(Note 4)
r
= t
FIGURE 3. Receiver Load Circuit
f
FIGURE 1. Driver Load Circuit
= 200 ns, V
R
C
(Figures 1, 2)
R
R
Input Pulse Width
C
(Figures 3, 4)
(Figures 3, 4)
L
L
L
L
L
= 3 kΩ
= 50 pF
= 3kΩ to 7 kΩ, C
= 3 kΩ, C
= 50 pF
IH
= 3V, V
Conditions
3
L
IL
= 2500 pF
= −3V, f = 64 kHz (128 kbits/sec). Driver AC input waveform for test purposes:
>
L
10 µs
= 50 pF
01128204
01128206
Min
4.0
3.0
01128205
Typ
0.7
0.6
0.1
5.0
2.0
2.8
0.8
2.5
15
Max
4.0
4.0
1.0
6.5
6.5
2.0
1.0
30
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Units
V/µs
V/µs
µs
µs
µs
µs
µs
µs
µs