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SN75172 Datasheet(PDF) 4 Page - Texas Instruments

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Part No. SN75172
Description  QUADRUPLE DIFFRENTIAL LINE DRIVER
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

SN75172 Datasheet(HTML) 4 Page - Texas Instruments

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SN75172
QUADRUPLE DIFFRENTIAL LINE DRIVER
SLLS038B – OCTOBER 1980 – REVISED MAY 1995
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
SYMBOL EQUIVALENTS
DATA SHEET PARAMETER
EIA/TIA-422-B
RS-485
VO
Voa, Vob
Voa, Vob
|VOD1|
Vo
Vo
|VOD2|
Vt (RL = 100 Ω)
Vt (RL = 54 Ω)
|VOD2|
Vt (Test Termination)
Measurement 2)
∆|VOD|
||Vt| – |Vt||
||Vt| – |Vt||
VOC
|Vos|
|Vos|
∆|VOC|
|Vos – Vos|
|Vos – Vos|
IOS
|Isa|,|Isb|
IO
|Ixa|,|Ixb|
Iia,Iib
switching characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
td(OD)
Differential-output delay time
RL =54 Ω
See Figure 2
45
65
ns
tt(OD)
Differential-output transition time
RL = 54 Ω,
See Figure 2
80
120
ns
tPZH
Output enable time to high level
RL = 110 Ω,
See Figure 3
80
120
ns
tPZL
Output enable time to low level
RL = 110 Ω,
See Figure 4
45
80
ns
tPHZ
Output disable time from high level
RL = 110 Ω,
See Figure 3
78
115
ns
tPLZ
Output disable time from low level
RL = 110 Ω,
See Figure 4
18
30
ns
PARAMETER MEASUREMENT INFORMATION
VOC
2
RL
2
RL
VOD2
Figure 1. Differential and Common-Mode Output Voltages
VOLTAGE WAVEFORMS
TEST CIRCUIT
10%
50%
90%
1.5 V
1.5 V
tt(OD)
td(OD)
tt(OD)
≈ 2.5 V
0 V
3 V
td(OD)
Output
Input
(see Note B)
CL = 50 pF
54
RL =
50
Generator
(see Note A)
3 V
3 V or 0
≈ 2.5 V
50%
Output
NOTES: A. The input pulse is supplied by a generator having the following characteristics: tr ≤ 5 ns, tf ≤ 5 ns, PRR ≤ 1 MHz, duty cycle = 50%,
ZO = 50 Ω.
B. CL includes probe and stray capacitance.
Figure 2. Differential-Output Test CIrcuit and Voltage Waveforms


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