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SN65LBC170DW Datasheet(PDF) 4 Page - Texas Instruments

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Part # SN65LBC170DW
Description  TRIPLE DIFFERENTIAL TRANSCEIVERS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN65LBC170DW Datasheet(HTML) 4 Page - Texas Instruments

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SN65LBC170, SN75LBC170
TRIPLE DIFFERENTIAL TRANSCEIVERS
SLLS459C − NOVEMBER 2000 − REVISED MARCH 2005
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
DRIVER SECTION
electrical characteristics over recommended operating conditions
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
UNIT
VIK
Input clamp voltage
D and DIR
II = 18 mA
−1.5
−0.7
V
VO
Open-circuit output voltage (single-ended)
A or B,
No load
0
VCC
V
Steady-state differential output voltage
No load
3.8
4.3
VCC
|VOD(SS)|
Steady-state differential output voltage
magnitude‡
RL = 54 Ω,
See Figure 1
1
1.6
2.4
V
|VOD(SS)|
magnitude‡
With common-mode loading, See Figure 2
1
1.6
2.4
V
∆VOD
Change in differential output voltage
magnitude, | VOD(H) | – |VOD(L) |
RL = 54 Ω,
−0.2
0.2
V
VOC(SS)
Steady-state common-mode output voltage
RL = 54 Ω,
CL = 50 pF
See Figure 1
2
2.4
2.8
V
∆VOC(SS)
Change in steady-state common-mode output
voltage (VOC(H) – VOC(L))
CL = 50 pF
See Figure 1
−0.2
0.2
V
II
Input current
D, DIR
−100
100
µA
IO
Output current with power off
VCC = 0 V,
VO = −7 V to 12 V
−700
900
µA
IOS
Short-circuit output current
VO = −7 V to 12 V,
See Figure 7
−250
250
mA
ICC
Supply current (driver enabled)
D at 0 V or VCC,
DIR at VCC, No load
14
20
mA
† All typical values are at VCC = 5 V and TA = 25°C.
‡ The minimum VOD may not fully comply with TIA/EIA-485-A at operating temperatures below 0°C. System designers should take the possibly
lower output signal into account in determining the maximum signal-transmission distance.
switching characteristics over recommended operating conditions
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tPLH
Differential output propagation delay, low-to high
4
8.5
12
tPHL
Differential output propagation delay, high-to-low
4
8.5
11
tr
Differential output rise time
3
7.5
11
tf
Differential output fall time
RL = 54 Ω, CL = 50 pF, See Figure 3
3
7.5
11
ns
tsk(p)
Pulse skew | (tPLH – tPHL) |
RL = 54 Ω, CL = 50 pF, See Figure 3
2
ns
tsk(o)
Output skew§
1.5
tsk(pp)
Part-to-part skew¶
2
tPLH
Differential output propagation delay, low-to high
3
7
10
tPHL
Differential output propagation delay, high-to-low
3
7.5
10
tr
Differential output rise time
See Figure 4,
3
7.5
12
tf
Differential output fall time
See Figure 4,
(HVD SCSI double-terminated load)
3
7.5
12
ns
tsk(p)
Pulse skew | (tPLH – tPHL) |
(HVD SCSI double-terminated load)
3
ns
tsk(o)
Output skew§
1.5
tsk(pp)
Part-to-part skew¶
2.5
tPZH
Output enable time to high level
See Figure 5
15
25
ns
tPHZ
Output disable time from high level
See Figure 5
18
25
ns
tPZL
Output enable time to low level
See Figure 6
10
25
ns
tPLZ
Output disable time from low level
See Figure 6
17
25
ns
§ Output skew (tsk(o)) is the magnitude of the time delay difference between the outputs of a single device with all of the inputs connected together.
¶ Part-to-part skew (tsk(pp)) is the magnitude of the difference in propagation delay times between any specified terminals of two devices when
both devices operate with the same input signals, the same supply voltages, at the same temperature, and have identical packages and test
circuits.


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