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| 型號： | A176B |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | DIFFERENTIAL BUS TRANSCEIVERS |
| 中文描述： | 差分總線收發(fā)器 |
| 文件頁數(shù)： | 5/21頁 |
| 文件大?。?/td> | 402K |
| 代理商： | A176B |
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101D
–
JULY 1985
–
REVISED APRIL 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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
VO
|VOD1|
Input clamp voltage
II =
–
18 mA
IO = 0
IO = 0
–
1.5
V
Output voltage
0
6
V
Differential output voltage
1.5
3.6
6
V
|VOD2|
Differential output voltag
RL = 100
,
See Figure 1
1/2 VOD1
or 2
V
RL = 54
,
See Note 5
See Figure 1
1.5
2.5
5
VOD3
Differential output voltage
1.5
5
V
|VOD|
Change in magnitude
of differential output voltage
§
RL= 54
RL = 54
or 100
,
See Figure 1
0 2
±
0.2
V
VOC
Common mode output voltage
Common-mode output voltage
RL= 54
RL = 54
or 100
,
See Figure 1
+3
–
1
V
|VOC|
Change in magnitude
of common-modeoutput voltage
§
RL= 54
RL = 54
or 100
,
See Figure 1
0 2
±
0.2
V
IO
Output current
Output disabled,
See Note 6
VO = 12 V
VO =
–
7 V
1
mA
–
0.8
IIH
IIL
High-level input current
VI = 2.4 V
VI = 0.4 V
VO =
–
7 V
VO = 0
VO = VCC
VO = 12 V
20
μ
A
μ
A
Low-level input current
–
400
–
250
IOS
Short circuit output current
Short-circuit output current
–
150
mA
250
250
ICC
Supply current (total package)
No load
Outputs enabled
Outputs disabled
42
26
70
35
mA
The power-off measurement in ANSI Standard TIA/EIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs.
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-
load is either 1/2 VOD1 or 2 V, whichever is greater.
NOTES:
5. See ANSI Standard TIA/EIA-485-A, Figure 3.5, Test Termination Measurement 2.
6. This applies for both power on and off; refer to ANSI Standard TIA/EIA-485-A for exact conditions. The TIA/EIA-422-B limit does
not apply for a combined driver and receiver terminal.
switching characteristics, V
CC
= 5 V, R
L
= 110
, T
A
= 25
°
C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
RL = 54
,
RL = 54
,
See Figure 4
MIN
TYP
MAX
UNIT
td(OD)
tt(OD)
tPZH
tPZL
tPHZ
tPLZ
Differential-output delay time
See Figure 3
15
22
ns
Differential-output transition time
See Figure 3
20
30
ns
Output enable time to high level
85
120
ns
Output enable time to low level
See Figure 5
40
60
ns
Output disable time from high level
See Figure 4
150
250
ns
Output disable time from low level
See Figure 5
20
30
ns
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