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SN75177B Datasheet(PDF) 4 Page - Texas Instruments

Part # SN75177B
Description  DIFFERENTIAL BUS REPEATERS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN75177B Datasheet(HTML) 4 Page - Texas Instruments

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SN75177B, SN75178B
DIFFERENTIAL BUS REPEATERS
SLLS002C – D2606, JULY 1985 – REVISED FEBRUARY 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
2–4
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
RL = 100 Ω
See Figure 1
1/2 VOD1
|VOD2|
Differential output voltage
RL = 100 Ω ,
See Figure 1
OD1
or 2 §
V
RL = 54 Ω,
See Figure 1
1.5
2.5
5
|VOD3|
Differential output voltage
See Note 3
1.5
5
V
∆|VOD|
Change in magnitude of
±02
V
∆|VOD|
gg
diferential output voltage‡
R54
Ω or 100 Ω
See Figure 1
±0.2
V
VOC
Common mode output voltage
RL = 54 Ω or 100 Ω, See Figure 1
3
V
VOC
Common-mode output voltage
–1
V
∆|VOC|
Change in magnitude of
±02
V
∆|VOC|
gg
common-mode output voltage‡
±0.2
V
IO
Output current
VCC = 0,
VO = – 7 V to 12 V
±100
µA
IOZ
High-impedance-state output current
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
– 400
µA
VO = – 7 V
– 250
IOS
Short-circuit output current
VO = VCC
250
mA
VO = 12 V
250
ICC
Supply current (total package)
No load
Outputs enabled
57
70
mA
ICC
Supply current (total package)
No load
Outputs disabled
26
35
mA
† All typical values are at VCC = 5 V and TA = 25°C.
∆|VOD| and ∆|VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low
level.
§ The minimum VOD2 with a 100-Ω load is either 1/2 VOD1 or 2, whichever is greater.
NOTE 3: See Figure 3.5 of EIA Standard RS-485.
switching characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tdD
Differential-output delay time
RL =54 Ω
See Figure 3
15
20
ns
ttD
Differential-output transition time
RL = 54 Ω,
See Figure 3
20
30
ns
tPZH
Output enable time to high level
RL = 110 Ω,
See Figure 4
85
120
ns
tPZL
Output enable time to low level
RL = 110 Ω,
See Figure 5
40
60
ns
tPHZ
Output disable time from high level
RL = 110 Ω,
See Figure 4
150
250
ns
tPLZ
Output disable time from low level
RL = 110 Ω,
See Figure 5
20
30
ns


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