參數(shù)資料
型號： SN75LBC170DWR
廠商： Texas Instruments, Inc.
英文描述： TRIPLE DIFFERENTIAL TRANSCEIVERS
中文描述： 三路差分收發(fā)器
文件頁數(shù)： 4/17頁
文件大?。?/td> 291K
代理商： SN75LBC170DWR
SN65LBC170, SN75LBC170
TRIPLE DIFFERENTIAL TRANSCEIVERS
SLLS459B
–
NOVEMBER 2000
–
REVISED FEBRUARY 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
DRIVER SECTION
electrical characteristics over recommended operating conditions
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIK
VO
Input clamp voltage
D and DIR
II = 18 mA
A or B, No load
–
1.5
–
0.7
V
Open-circuit output voltage (single-ended)
0
VCC
VCC
2.4
V
Stead
magnitude
t t diff
ti l
t
t
lt
No load
RL = 54
,
With common-mode loading, See Figure 2
3.8
4.3
|VOD(SS)|
See Figure 1
1
1.6
V
1
1.6
2.4
VOD
Change in differential output voltage
magnitude, | VOD(H) |
–
|VOD(L) |
Steady-state common-mode output voltage
RL = 54
,
CL= 50 pF
CL = 50 pF
–
0.2
0.2
V
VOC(SS)
See Figure 1
2
2.4
2.8
VOC(SS)
Change in steady-state common-mode output
voltage (VOC(H)
–
VOC(L))
Input current
–
0.2
0.2
V
II
IO
IOS
ICC
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.
D, DIR
–
100
100
μ
A
μ
A
mA
Output current with power off
VCC = 0 V,
VO =
–
7 V to 12 V,
D at 0 V or VCC,
VO =
–
7 V to 12 V
See Figure 7
–
700
900
Short-circuit output current
–
250
250
Supply current (driver enabled)
DIR at VCC, No load
14
20
mA
switching characteristics over recommended operating conditions
PARAMETER
TEST CONDITIONS
MIN
TYP
8.5
8.5
7.5
7.5
MAX
UNIT
tPLH
tPHL
tr
tf
tsk(p)
tsk(o)
tsk(pp)
tPLH
tPHL
tr
tf
tsk(p)
tsk(o)
tsk(pp)
tPZH
tPHZ
tPZL
tPLZ
§
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.
Differential output propagation delay, low-to high
Differential output propagation delay, high-to-low
Differential output rise time
Differential output fall time
Pulse skew | (tPLH
–
tPHL) |
Output skew
§
Part-to-part skew
Differential output propagation delay, low-to high
Differential output propagation delay, high-to-low
Differential output rise time
Differential output fall time
Pulse skew | (tPLH
–
tPHL) |
Output skew
§
Part-to-part skew
Output enable time to high level
Output disable time from high level
Output enable time to low level
Output disable time from low level
4
4
3
3
12
11
11
11
2
1.5
RL = 54
, CL = 50 pF, See Figure 3
RL 54
, CL 50 F, See Figure 3
ns
2
3
3
3
3
7
10
10
12
12
3
1.5
2.5
25
25
25
25
7.5
7.5
7.5
See Figure 4,
(HVD SCSI double-terminated load)
ns
See Figure 5
15
18
10
17
ns
See Figure 6
ns
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