SN75174 [TI]
QUADRUPLE DIFFERENTIAL LINE DRIVER; 四路差动线路驱动器
| 型号： | SN75174 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | QUADRUPLE DIFFERENTIAL LINE DRIVER |
| 文件： | 总9页 (文件大小：141K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
N PACKAGE
(TOP VIEW)
Meets or Exceeds the Requirements of
ANSI Standards EIA/TIA-422-B and RS-485
and ITU Recommendation V.11.
V
1A
1Y
1
2
3
4
5
6
7
8
16
15
14
CC
Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
4A
4Y
1Z
3-State Outputs
13 4Z
1,2EN
2Z
Common-Mode Output Voltage Range of
–7 V to 12 V
12 3,4EN
11
10
9
3Z
3Y
3A
2Y
2A
Active-High Enable
GND
Thermal Shutdown Protection
Positive- and Negative-Current Limiting
Operates From Single 5-V Supply
Low Power Requirements
DW PACKAGE
(TOP VIEW)
Functionally Interchangeable With MC3487
1A
1Y
V
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
CC
4A
4Y
NC
4Z
description
NC
1Z
The SN75174 is
a
monolithic quadruple
1,2EN
2Z
differential line driver with 3-state outputs. It is
designed to meet the requirements of ANSI
Standards EIA/TIA-422-B and RS-485 and ITU
Recommendation V.11. The device is optimized
for balanced multipoint bus transmission at rates
up to 4 megabaud. Each driver features wide
positive and negative common-mode output
voltage ranges making it suitable for party-line
applications in noisy environments.
15 3,4EN
14
13
12
11
NC
3Z
NC
3Y
3A
2Y
2A
GND
NC – No internal connection
The SN75174 provides positive- and negative-current limiting and thermal shutdown for protection from line
fault conditions on the transmission bus line. Shutdown occurs at a junction temperature of approximately
150°C. This device offers optimum performance when used with the SN75173 or SN75175 quadruple
differential line receivers.
The SN75174 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each driver)
OUTPUTS
INPUT
ENABLE
Y
H
L
Z
L
H
L
H
H
L
H
Z
X
Z
H = TTL high level, X = irrelevant,
L = TTL low level, Z = high impedance (off)
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1995, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
†
logic symbol
logic diagram, each driver (positive logic)
4
1,2EN
EN
Y
A
Z
2
3
6
5
1Y
1
7
1A
2A
1Z
2Y
2Z
EN
12
3,4EN
EN
10
11
14
13
3Y
3Z
4Y
4Z
9
3A
4A
15
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
schematics of inputs and outputs
EQUIVALENT OF EACH INPUT
TYPICAL OF ALL OUTPUTS
V
CC
V
CC
R
(eq)
Input
Output
GND
Data Inputs: R
= 3 kΩ NOM
(eq)
Enable Inputs: R
= 8 kΩ NOM
= equivalent resistor
(eq)
R
(eq)
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
†
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Output voltage range,V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10 V to 15 V
O
Input voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
I
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to the network ground terminal.
DISSIPATION RATING TABLE
≤ 25°C DERATING FACTOR
T
A
T = 70°C
A
POWER RATING
PACKAGE
POWER RATING
ABOVE T = 25°C
A
DW
N
1125 mW
9.0 mW/°C
9.2 mW/°C
720 mW
1150 mW
736 mW
recommended operating conditions
MIN NOM
MAX
UNIT
V
Supply voltage, V
4.75
2
5
5.25
CC
High-level input voltage, V
V
IH
Low-level input voltage, V
0.8
–7 to 12
–60
V
IL
Common-mode output voltage, V
V
OC
High-level output current, I
mA
mA
°C
OH
Low-level output current, I
60
OL
Operating free-air temperature, T
0
70
A
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
†
TYP
PARAMETER
Input clamp voltage
TEST CONDITIONS
MIN
MAX
UNIT
V
V
I = –18 mA
–1.5
V
IK
I
V
= 2 V,
= –33 mA
V
V
= 0.8 V,
= 0.8 V,
IH
IL
High-level output voltage
Low-level output voltage
3.7
1.1
V
V
OH
I
OH
V
IH
= 2 V,
= 33 mA
IL
V
V
OL
I
I
I
OL
Output voltage
= 0
0
6
6
V
V
O
O
O
|V
|
|
Differential output voltage
= 0
1.5
6
OD1
OD2
OD3
1/2 V
OD1
or 2
R
= 100 Ω,
See Figure 1
See Figure 1
V
L
‡
|V
Differential output voltage
R
= 54 Ω,
1.5
1.5
2.5
5
5
V
V
L
V
Differential output voltage
See Note 2
Change in magnitude of differential output
∆|V
±0.2
V
V
V
OD|
§
voltage
Common-mode output voltage
Change in magnitude of common-mode output
+3
–1
¶
V
OC
R
= 54 Ω or 100 Ω,
See Figure 1
L
∆|V
|
±0.2
OC
§
voltage
I
I
I
I
Output current with power off
High-impedance-state output current
High-level input current
V
V
= 0,
V = – 7 V to 12 V
O
±100
±100
20
µA
µA
µA
µA
O
CC
= – 7 V to 12 V
O
OZ
IH
IL
V = 2.7 V
I
Low-level input current
V = 0.5 V
I
–360
–180
180
500
60
V
O
V
O
V
O
= – 7 V
I
Short-circuit output current
Supply current (all drivers)
= V
CC
= 12 V
mA
mA
OS
CC
Outputs enabled
Outputs disabled
38
18
I
No load
40
†
‡
§
All typical values are at V
= 5 V and T = 25°C.
A
CC
The minimum V
with a 100-Ω load is either 1/2 V
or 2 V, whichever is greater.
, respectively, that occur when the input is changed from a high level to a low
OD2
OD1
| are the changes in magnitude of V and V
∆|V
| and ∆|V
OD
OC OD
OC
level.
¶
In ANSI Standard EIA/TIA-422-B, V , which is the average of the two output voltages with respect to ground, is called output offset voltage,
OC
V
OS
.
NOTE 2: See EIA Standard RS-485.
switching characteristics, V
= 5 V, T = 25°C
A
CC
PARAMETER
TEST CONDITIONS
MIN
TYP
45
MAX
65
UNIT
ns
t
t
t
t
t
t
Differential-output delay time
d(OD)
t(OD)
PZH
PZL
R
= 54 Ω,
See Figure 2
L
Differential-output transition time
Output enable time to high level
Output enable time to low level
Output disable time from high level
Output disable time from low level
80
120
120
80
ns
R
L
R
L
R
L
R
L
= 110 Ω,
= 110 Ω,
= 110 Ω,
= 110 Ω,
See Figure 3
See Figure 4
See Figure 3
See Figure 3
80
ns
55
ns
75
115
30
ns
PHZ
PLZ
18
ns
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
SYMBOL EQUIVALENTS
EIA/TIA-422-B
DATA SHEET PARAMETER
RS-485
V
O
V
V
V V
oa, ob
oa, ob
|V
|V
|
|
V
V
o
OD1
o
V (R = 100 Ω)
V (R = 54 Ω)
t L
OD2
t
L
V (Test Termination)
t
Measurement 2)
|V
|
OD3
∆|V
|
||V | – |V ||
| |V | – |V ||
t t
OD
t
t
V
OC
|V
os
|
|V |
os
∆|V
|
|V – V
os os
|
|V – V |
os os
OC
I
|I |,|I
|
|
OS
sa sb
I
O
|I |,|I
xa xb
I ,I
ia ib
PARAMETER MEASUREMENT INFORMATION
R
L
2
V
OD2
R
L
V
OC
2
Figure 1. Differential and Common-Mode Output Voltages
3 V
Input
1.5 V
1.5 V
0 V
R
54 Ω
=
L
t
t
d(OD)
Output
CL = 50 pF
(see Note B)
d(OD)
Generator
(see Note A)
~2.5 V
50 Ω
90%
50%
10%
90%
50%
10%
Output
3 V
~2.5 V
t
t(OD)
t
t(OD)
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: t ≤ 5 ns, t ≤ 5 ns, PRR ≤ 1 MHz, duty cycle = 50%,
r
f
Z
C
= 50 Ω.
O
L
B.
includes probe and stray capacitance.
Figure 2. Differential-Output Test Circuit and Voltage Waveforms
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
3 V
0 V
Input
1.5 V
1.5 V
S1
3 V to 0 V
Output
0.5 V
t
PZH
R
= 110 Ω
L
C
= 50 pF
Generator
(see Note A)
L
V
OH
(see Note B)
50 Ω
Output
2.3 V
PHZ
V
off
≈ 0 V
t
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, duty cycle = 50%, t ≤ 5 ns,
r
t ≤ 5 ns, Z = 50 Ω.
f
O
B.
C
L
includes probe and stray capacitance.
Figure 3. Test Circuit and Voltage Waveforms
5 V
3 V
R
= 110 Ω
L
1.5 V
S1
Input
1.5 V
0 V to 3 V
Output
0 V
5 V
t
t
PZL
PLZ
C
= 50 pF
Generator
(see Note A)
L
50 Ω
(see Note B)
0.5 V
2.3 V
Output
V
OL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, duty cycle = 50%, t ≤ 5 ns,
r
t ≤ 5 ns, Z = 50 Ω.
f
O
B.
C
L
includes probe and stray capacitance.
Figure 4. Test Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
TYPICAL CHARACTERISTICS
HIGH-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
LOW-LEVEL OUTPUT CURRENT
5
4.5
4
5
4.5
4
V
= 5 V
V
= 5 V
CC
CC
T
A
= 25°C
T
A
= 25°C
3.5
3
3.5
3
2.5
2
2.5
2
1.5
1
1.5
1
0.5
0
0.5
0
0
20
40
60
80
100
120
0
–20
–40
–60
–80
–100
–120
I
– High-Level Output Current – mA
I
– Low-Level Output Current – mA
OH
OL
Figure 5
Figure 6
DIFFERENTIAL OUTPUT VOLTAGE
OUTPUT CURRENT
vs
vs
OUTPUT CURRENT
OUTPUT VOLTAGE
4
3.5
3
50
V
= 5 V
Output Disabled
T = 25°C
A
CC
= 25°C
40
30
T
A
20
2.5
2
10
V
CC
= 0 V
0
–10
–20
–30
–40
–50
1.5
1
V
= 5 V
CC
0.5
0
0
10 20 30 40 50 60 70 80 90
–25 –20 –15 –10 –5
0
5
10 15 20 25
I
O
– Output Current – mA
V
O
– Output Voltage – V
Figure 7
Figure 8
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75174
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS039B – OCTOBER 1980 – REVISED MAY 1995
TYPICAL CHARACTERISTICS
SUPPLY CURRENT
vs
SUPPLY VOLTAGE
SUPPLY CURRENT
vs
SUPPLY VOLTAGE
30
25
20
15
10
5
100
90
80
70
60
50
40
30
20
10
0
No Load
Outputs Enabled
= 25°C
No Load
Input Open
Outputs Disabled
= 25°C
T
A
T
A
Inputs Open
Inputs
Grounded
0
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
V
CC
– Supply Voltage – V
V
CC
– Supply Voltage – V
Figure 9
Figure 10
APPLICATION INFORMATION
1/4 SN75172
1/4 SN75174
R
T
R
T
1/4 SN75173
Up to 32
RS-485 Unit Loads
1/4 SN75175
1/4 SN75172
1/4 SN75173
1/4 SN75173
1/4 SN75174
NOTE: The line length should be terminated at both ends in its characteristic impedance (R = Z ). Stub lengths off the main line should be
T
O
kept as short as possible.
Figure 11. Typical Application Circuit
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
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any product or service without notice, and advise customers to obtain the latest version of relevant information
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subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
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BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
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party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
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