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SN75179B Datasheet(Fiches technique) 5 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
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
RECEIVER SECTION
electrical characteristics over recommended ranges of common-mode input voltage, supply
voltage, and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
UNIT
VIT +
Positive-going input threshold voltage
VO = 2.7 V,
IO = – 0.4 mA
0.2
V
VIT –
Negative-going input threshold voltage
VO = 0.5 V,
IO = 8 mA
– 0.2‡
V
Vhys
Hysteresis voltage (VIT + – VIT –)
50
mV
VOH
High-level output voltage
VID = 200 mV,
IOH = – 400 µA,
See Figure 2
2.7
V
VOL
Low-level output voltage
VID = – 200 mV,
IOL = 8 mA,
See Figure 2
0.45
V
II
Line input current
Other input at 0 V
See Note 5
VI = 12 V
1
mA
II
Line input current
Other input at 0 V,
See Note 5
VI = – 7 V
– 0.8
mA
ri
Input resistance
12
k
IOS
Short-circuit output current
–15
–85
mA
ICC
Supply current (total package)
No load
57
70
mA
† All typical values are at VCC = 5 V, TA = 25°C.
‡ The algebraic convention, where the less positive (more negative) limit is designated minimum, is used in this data sheet for common-mode input
voltage and threshold voltage levels only.
NOTE 5: Refer to TIA/EIA-422-B for exact conditions.
switching characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tPLH
Propagation delay time, low- to high-level output
VID = – 1.5 V to 1.5 V,
19
35
ns
tPHL
Propagation delay time, high- to low-level output
ID
CL = 15 pF,
See Figure 4
30
40
ns
PARAMETER MEASUREMENT INFORMATION
VOD2
RL
2
VOC
RL
2
Figure 1. Driver VDD and VOC
VID
–IOH
VOH
+ IOL
VOL
Figure 2. Receiver VOH and VOL




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