SN75ALS1177N [TI]
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS; 双路差动驱动器和接收
| 型号： | SN75ALS1177N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | DUAL DIFFERENTIAL DRIVERS AND RECEIVERS |
| 文件： | 总11页 (文件大小：192K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
†
SN75ALS1177 . . . N OR NS PACKAGE
Meet or Exceed Standards EIA/TIA-422-B,
RS-485, CCITT Recommendation V.11
(TOP VIEW)
Designed for Multipoint Bus Transmission
on Long Bus Lines in Noisy Environments
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1B
1A
V
CC
1D
1Y
1Z
DE
2Z
2Y
2D
Low Supply Current Requirement
50 mA Max
1R
RE
2R
Driver Positive- and Negative-Current
Limiting
2A
Driver Common-Mode Output Voltage
Range of –7 V to 12 V
2B
GND
Thermal Shutdown Protection
Driver 3-State Outputs Active-High Enable
†
SN75ALS1178 . . . N OR NS PACKAGE
(TOP VIEW)
Receiver Common-Mode Input Voltage
Range of –12 V to 12 V
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
1B
1A
Receiver Input Sensitivity . . . ±200 mV
1D
1Y
1Z
Receiver Hysteresis . . . 50 mV Typ
1R
Receiver High Input Impedance
12 kΩ Min
1DE
2R
2DE
2Z
Receiver 3-State Outputs Active-Low
Enable for SN75ALS1177 Only
2A
2Y
2D
2B
Operate From Single 5-V Supply
GND
description
†
The NS package is only available in left-end taped and
reeled (SN75ALS1177NSLE and SN75ALS1178SNLE).
The SN75ALS1177 and SN75ALS1178 dual
differential drivers and receivers are monolithic
integrated circuits designed for bidirectional data
communication on multipoint bus transmission
lines. They are designed for balanced transmis-
sion lines and meet standards EIA/TIA-422-B,
RS-485, and CCITT Recommendation V.11.
The SN75ALS1177 combines dual 3-state differential line drivers and dual 3-state differential input line
receivers, both of which operate from a single 5-V power supply. The drivers and receivers have active-high
and active-low enables, respectively, which can be externally connected together to function as direction
control. The SN75ALS1178 drivers each have an individual active-high enable. Fail-safe design ensures that
when the receiver inputs are open, the receiver outputs are always high.
The SN75ALS1177 and SN75ALS1178 are characterized for operation from 0°C to 70°C.
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
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
Function Tables
SN75ALS1177, SN75ALS1178
(each driver)
OUTPUTS
INPUT
D
ENABLE
DE
Y
H
L
Z
L
H
L
H
H
L
H
Z
X
Z
SN75ALS1177
(each receiver)
DIFFERENTIAL
A – B
ENABLE
RE
OUTPUT
Y
V
≥ 0.2 V
L
L
L
H
L
H
?
ID
–0.2 V < V < 0.2 V
ID
V
ID
≤ –0.2 V
X
L
Z
H
Open
SN75ALS1178
(each receiver)
DIFFERENTIAL
A – B
OUTPUT
Y
H
?
V
≥ 0.2 V
ID
–0.2 V < V < 0.2 V
ID
V
ID
≤ –0.2 V
L
Open
H
H = high level, L = low level,
? = indeterminate, X = irrelevant,
Z = high impedance (off)
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
†
logic symbol
logic diagram (positive logic)
SN75ALS1177
SN75ALS1177
EN1
EN2
12
12
DE
4
DE
RE
4
RE
14
13
2
15
1
1
1Y
1Z
1A
1B
2Y
2Z
2A
2B
14
1D
15
3
1Y
1Z
1D
1R
2D
2R
13
3
1R
2
1
2
1
1A
1B
10
11
6
9
1
1
2D
10
11
9
2Y
2Z
5
2R
2
7
6
7
5
2A
2B
SN75ALS1178
EN
4
1DE
14
13
2
1Y
1Z
1A
1B
2Y
2Z
2A
2B
SN75ALS1178
15
4
1D
1DE
1D
14
13
2
3
15
1Y
1Z
1A
1B
1R
1
12
10
11
6
2DE
9
EN
3
1R
2DE
2D
1
2D
12
9
5
10
11
6
2R
7
2Y
2Z
2A
2B
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
5
2R
7
equivalent schematics
EQUIVALENT OF DRIVER OR ENABLE INPUT
EQUIVALENT OF RECEIVER INPUT
V
CC
V
CC
35 kΩ NOM
Input
1.7 kΩ
NOM
17 kΩ
NOM
Input
288 kΩ
NOM
1.7 kΩ
NOM
V
(A)
CC
or
GND (B)
GND
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
schematics of outputs
TYPICAL OF DRIVER OUTPUTS
TYPICAL OF RECEIVER OUTPUTS
V
CC
70 Ω
NOM
V
CC
Output
Output
GND
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V (DE, RE, and D inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
I
Output voltage range, V (Driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –9 V to 14 V
O
Input voltage range, Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –14 V to 14 V
Receiver differential-input voltage range (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –14 V to 14 V
Receiver low-level output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Continuous total power 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.
NOTES: 1. All voltage values, except differential input voltage, are with respect to the network ground terminal.
2. Differential input voltage is measured at the noninverting terminal with respect to the inverting terminal.
DISSIPATION RATING TABLE
T
≤ 25°C
OPERATING FACTOR
T = 70°C
A
POWER RATING
A
PACKAGE
POWER RATING
ABOVE T = 25°C
A
N
1150 mW
9.2 mW/°C
4.0 mW/°C
736 mW
NS
625 mW
445 mW
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
recommended operating conditions
MIN NOM
4.75
MAX
5.25
±12
12
UNIT
V
Supply voltage, V
5
CC
Differential input voltage, V
ID
Common-mode output voltage, V
Receiver
Driver
V
†
2
–7
V
OC
Common-mode input voltage, V
Receiver
DE, RE, D
DE, RE, D
Driver
±12
V
IC
High-level input voltage, V
V
IH
Low-level input voltage, V
0.8
–60
–400
60
V
IL
mA
µA
High-level output current, I
OH
Receiver
Driver
Low-level output current, I
mA
OL
Receiver
8
Operating free-air temperature, T
A
0
70
°C
†
The algebraic convention, where the less positive (more negative) limit is designated as minimum, is used in this data sheet for common-mode
output and threshold voltage level only.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
†
PARAMETER
Input clamp voltage
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
V
V
I = –18 mA
–1.5
V
V
V
V
IK
I
High-level output voltage
Low-level output voltage
Differential output voltage
V
= 2 V,
= 2 V,
V
V
= 0.8 V,
= 0.8 V,
I
I
= –33 mA
= 33 mA
3.3
1.1
OH
OL
IH
IH
IL
OH
V
IL
OL
|V
|V
|V
|
|
|
I
O
= 0
1.5
6
OD1
OD2
OD3
1/2 V
OD1
V
R
= 5 V,
= 100 Ω
CC
L
Differential output voltage
See Figure 1
2
1.5
1.5
V
R
= 54 Ω
5
5
L
Differential output voltage
See Note 3
V
V
V
V
Change in magnitude of differential
output voltage (see Note 4)
∆|V
|
±0.2
3
OD
‡
–1
V
OC
Common-mode output voltage
R
= 54 Ω or 100 Ω,
See Figure 1
L
Change in magnitude of common-mode
output voltage (see Note 4)
∆|V
|
±0.2
OC
I
I
I
I
Output current with power off
High-impedance-state output current
High-level input current
V
V
V
V
V
V
V
V
= 0,
V = –7 V to 12 V
O
±100
±100
100
–100
–250
250
250
150
50
µA
µA
µA
µA
O(OFF)
CC
= –7 V to 12 V
= 2.7 V
OZ
O
IH
IL
O
O
O
O
IH
Low-level input current
= 0.4 V
IL
= –7 V
= V
CC
I
Short-circuit output current
mA
mA
OS
= 12 V
= 0 V
Outputs enabled
Outputs disabled
35
20
I
Supply current (total package)
No load
CC
50
†
‡
All typical values are at V
= 5 V and T = 25°C.
A
CC
The algebraic convention, where the less positive (more negative) limit is designated as minimum, is used in this data sheet for common-mode
output and threshold voltage levels only.
NOTES: 3. See EIA Standard RS-485 Figure 3.5, test termination measurement 2.
4. ∆|V | and ∆|V | are the changes in magnitude of V and V , respectively, that occur when the input is changed from a high
OD
OC OD OC
level to a low level.
switching characteristics at V
= 5 V, T = 25°C (unless otherwise noted)
CC
A
PARAMETER
TEST CONDITIONS
MIN
9
TYP
15
15
2
MAX
22
22
8
UNIT
ns
t
t
t
t
t
t
t
Propagation delay time, high- to low-level output
PLH
PHL
sk
R
= 60 Ω,
C
= C
= 100 pF,
L2
L
L1
Propagation delay time, low- to high-level output
Output-to-output skew
9
ns
See Figure 3
0
ns
Output enable time to high level
Output enable time to low level
Output disable time from high level
Output disable time from low level
C
C
C
C
= 100 pF,
= 100 pF,
= 15 pF,
= 15 pF,
See Figure 4
See Figure 5
See Figure 4
See Figure 5
30
5
35
15
15
15
50
25
30
30
ns
PZH
PZL
PHZ
PLZ
L
L
L
L
ns
7
ns
7
ns
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
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
V
V
IT+
V
IT–
V
hys
V
IK
Positive-going input threshold voltage
Negative-going input threshold voltage
V
V
= 2.7 V,
= 0.5 V,
I
I
= –0.4 mA
= 8 mA
0.2
O
O
‡
–0.2
V
O
O
Input hysteresis voltage (V
– V
)
IT–
50
mV
V
IT+
Enable input clamp voltage
SN75ALS1177 I = –18 mA
–1.5
I
V
= 200 mV,
I
I
= –400 µA,
ID
See Figure 2
OH
V
OH
V
OL
High-level output voltage
2.7
V
V
= 200 mV,
= 8 mA,
ID
See Figure 2
OL
Low-level output voltage
0.45
V
I
High-impedance-state output current
Line input current (see Note 5)
SN75ALS1177
V
= 0.4 V to 2.4 V
±20
1
µA
OZ
O
V = 12 V
I
I
I
Other input at 0 V
mA
V = –7 V
I
–0.8
20
I
I
High-level input current, RE
Low-level input current, RE
Input resistance
SN75ALS1177
SN75ALS1177
V
V
= 2.7 V
= 0.4 V
µA
µA
IH
IH
–100
IL
IL
r
12
kΩ
mA
mA
i
I
I
Short-circuit output current
Supply current (total package)
V
O
= 0 V,
See Note 6
–15
–85
50
OS
No load,
Outputs enabled
35
CC
†
‡
All typical values are at V
= 5 V and T = 25°C.
A
CC
The algebraic convention, where the less positive (more negative) limit is designated as minimum, is used in this data sheet for common-mode
output and threshold voltage levels only.
NOTES: 5. Refer to EIA standards RS-422-A, RS-423-A, and RS-485-A for exact conditions.
6. Not more than one output should be shorted at a time.
switching characteristics at V
= 5 V, T = 25°C (unless otherwise noted)
CC
A
PARAMETER
TEST CONDITIONS
MIN
15
15
10
10
5
TYP
25
MAX
37
UNIT
ns
t
t
t
t
t
t
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Output enable time to high level
PLH
PHL
PZH
PZL
PHZ
PLZ
C
= 15 pF,
See Figure 6
L
25
37
ns
SN75ALS1177
SN75ALS1177
SN75ALS1177
SN75ALS1177
C
C
C
C
= 100 pF, See Figure 7
= 100 pF, See Figure 7
20
30
ns
L
L
L
L
Output enable time to low level
20
30
ns
Output disable time from high level
Output disable time from low level
= 15 pF,
= 15 pF,
See Figure 7
See Figure 7
12
16
ns
5
12
16
ns
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
R
V
ID
L
2
I
OH
V
OD2
V
OH
R
L
V
OL
V
OC
I
2
OL
Figure 1. Driver Test Circuit, V
and V
Figure 2. Receiver Test Circuit, V
and V
OD
OC
OH OL
3 V
0 V
Driver
Input
1.5 V
1.5 V
C
= 100 pF
L1
(see Note B)
t
t
PHL
PLH
60 Ω
1/2 V
O
Generator
(see Note A)
1/2 V
Z Output
O
50 Ω
C
= 100 pF
L2
(see Note B)
V
O
Y Output
3 V
t
sk
t
sk
DRIVER TEST CIRCUIT
NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
DRIVER VOLTAGE WAVEFORMS
r
f
B.
C includes probe and jig capacitance.
L
Figure 3. Driver Propagation Delay Times
Output
S1
3 V
0 V
1.5 V
1.5 V
Input
3 V or 0 V
t
t
PHZ
PZH
C
R
= 500 Ω
L
L
(see Note B)
V
OH
Generator
(see Note A)
Output
2.3 V
50 Ω
0 V
0.5 V
DRIVER VOLTAGE WAVEFORMS
DRIVER TEST CIRCUIT
NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
r
f
B.
C includes probe and jig capacitance.
L
Figure 4. Driver Enable and Disable TImes
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
V
CC
R
= 500 Ω
L
3 V
0 V
S1
1.5 V
1.5 V
Input
Output
3 V or 0 V
t
PLZ
t
PZL
0.5 V
C
L
0 V
(see Note B)
Generator
(see Note A)
2.3 V
50 Ω
Output
V
OL
DRIVER VOLTAGE WAVEFORMS
DRIVER TEST CIRCUIT
NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
r
f
B.
C includes probe and jig capacitance.
L
Figure 5. Driver Enable and Disable Times
Output
Generator
(see Note A)
1 kΩ
50 Ω
0 V
V
CC
C
L
(see Note B)
1 kΩ
1N916 or
Equivalent
0 V (SN75ALS1177 only)
RECEIVER TEST CIRCUIT
2.5 V
–2.5 V
0 V
0 V
Input
t
t
PHL
PLH
V
OH
1.5 V
1.5 V
Output
V
OL
DRIVER VOLTAGE WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
r
f
B.
C includes probe and jig capacitance.
L
Figure 6. Receiver Propagation Delay Times
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
SLLS154A – MARCH 1993 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
S1
Output
1.5 V
S2
1 kΩ
V
CC
–1.5 V
C
L
(see Note B)
1N916 or
Equivalent
1 kΩ
Generator
(see Note A)
50 Ω
S3
RECEIVER TEST CIRCUIT
3 V
0 V
Input
1.5 V
1.5 V
S1 to –1.5 V
S2 Closed
S3 Closed
S1 to –1.5 V
S2 Closed
S3 Closed
t
PLZ
t
PZL
0.5 V
5 V
1.5 V
1.5 V
V
OL
S1 to 1.5 V
S2 Open
S3 Closed
Output
t
PZH
V
OH
S1 to 1.5 V
S2 Open
S3 Closed
0 V
t
PHZ
0.5 V
RECEIVER VOLTAGE WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
r
f
B.
C includes probe and jig capacitance.
L
Figure 7. Receiver Output Enable and Disable TImes
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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pertaining to warranty, patent infringement, and limitation of liability.
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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.
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Copyright 1998, Texas Instruments Incorporated
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