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SN75179B Datasheet(Fiches technique) 4 Page - Texas Instruments

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Numéro de pièce SN75179B
Description  DIFFERENTIAL DRIVER AND RECEIVER PAIR
Télécharger  9 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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SN75179B
DIFFERENTIAL DRIVER AND RECEIVER PAIR
SLLS003E – OCTOBER 1985 – REVISED JUNE 1998
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
UNIT
VIK
Input clamp voltage
II = - 18 mA
– 1.5
V
VO
Output voltage
IO = 0
0
6
V
VOD1 Differential output voltage
IO = 0
1.5
6
V
VOD2 Differential output voltage
RL = 100 Ω,
See Figure 1
1/2VOD1
or 2‡
V
OD2
g
RL = 54 Ω,
See Figure 1
1.5
2.5
5
V
VOD3 Differential output voltage
See Note 4
1.5
5
V
∆VOD
Change in magnitude of common-mode
output voltage§
±0.2
V
VOC
Common-mode output voltage
RL = 54 Ω or 100 Ω,
See Figure 1
3
–1
V
∆VOC
Change in magnitude of common-mode
output voltage§
±0.2
V
IO
Output current
VCC = 0,
VO = – 7 V to 12 V
±100
µA
IIH
High-level input current
VI = 2.4 V
20
µA
IIL
Low-level input current
VI = 0.4 V
– 200
µA
IOS
Short circuit output current
VO = – 7 V
– 250
mA
IOS
Short-circuit output current
VO = VCC or 12 V
250
mA
ICC
Supply current (total package)
No load
57
70
mA
† All typical values are at VCC = 5 V and TA = 25°C.
‡ The minimum VOD2 with 100-Ω load is either 1/2 VOD2 or 2 V, whichever is greater.
§
∆|VOD| and ∆|VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input changes from a high level to a low
level.
NOTE 4: See TIA/EIA-485-A, Figure 3.5, Test Termination Measurement 2.
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 3
15
22
ns
tt(OD)
Differential output transition time
RL = 54 Ω,
See Figure 3
20
30
ns
Symbol Equivalents
DATA-SHEET PARAMETER
TIA/EIA-422-B
TIA/EIA-485-A
VO
Voa, Vob
Voa, Vob
|VOD1 |
Vo
Vo
|VOD2 |
Vt (RL = 100 Ω)
Vt (RL = 54 Ω)
|VOD3 |
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




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