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SNJ55LBC176FK Datasheet(PDF) 7 Page - Texas Instruments

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Part # SNJ55LBC176FK
Description  DIFFERENTIAL BUS TRANSCEIVERS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SNJ55LBC176FK Datasheet(HTML) 7 Page - Texas Instruments

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SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176
DIFFERENTIAL BUS TRANSCEIVERS
SLLS067G − AUGUST 1990 − REVISED APRIL 2006
7
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 −)
(see Figure 4)
50
mV
VIK
Enable-input clamp voltage
II = − 18 mA
−1.5
V
VOH
High-level output voltage
VID = 200 mV,
IOH = − 400 µA,
2.7
V
VOH
High-level output voltage
VID = 200 mV,
See Figure 6
IOH = − 400 µA,
2.7
V
VOL
Low-level output voltage
VID = −200 mV,
IOL = 8 mA,
0.45
V
VOL
Low-level output voltage
VID = −200 mV,
See Figure 6
IOL = 8 mA,
0.45
V
IOZ
High-impedance-state output
current
VO = 0.4 V to 2.4 V
−20
20
µA
II
Line input current
Other input = 0 V,
VI = 12 V
1
mA
II
Line input current
Other input = 0 V,
See Note 5
VI = − 7 V
−0.8
mA
IIH
High-level enable-input current
VIH = 2.7 V
−100
µA
IIL
Low-level enable-input current
VIL = 0.4 V
−100
µA
rI
Input resistance
12
k
Receiver enabled
and driver disabled
3.9
mA
ICC
Supply current
VI = 0 or VCC,
No load
Receiver and
SN55LBC176,
SN65LBC176,
0.25
ICC
Supply current
No load
Receiver and
driver disabled
SN65LBC176,
SN65LBC176Q
0.25
mA
driver disabled
SN75LBC176
0.2
† All typical values are at VCC = 5 V, TA = 25°C.
‡ The algebraic convention, in which the less-positive (more-negative) limit is designated minimum, is used in this data sheet.
NOTE 5: This applies for both power on and power off. Refer to ANSI Standard RS-485 for exact conditions.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, CL = 15 pF
PARAMETER
TEST CONDITIONS
SN55LBC176
SN65LBC176Q
SN65LBC176
SN75LBC176
UNIT
PARAMETER
TEST CONDITIONS
MIN
MAX
MIN
TYP†
MAX
UNIT
tPLH
Propagation delay time, low- to high-level
single-ended output
VID = − 1.5 V to 1.5 V,
11
37
11
33
ns
tPHL
Propagation delay time, high- to low-level
single-ended output
VID = − 1.5 V to 1.5 V,
See Figure 7
11
37
11
33
ns
tsk(p)
Pulse skew ( | tPLH − tPHL |)
10
3
6
ns
tPZH
Output enable time to high level
See Figure 8
35
35
ns
tPZL
Output enable time to low level
See Figure 8
35
30
ns
tPHZ
Output disable time from high level
See Figure 8
35
35
ns
tPLZ
Output disable time from low level
See Figure 8
35
30
ns
† All typical values are at VCC = 5 V, TA = 25°C.


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