SN65LBC179A [TI]
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS; 低功耗差动线路驱动器和接收器对
| 型号： | SN65LBC179A |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS |
| 文件： | 总13页 (文件大小：192K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
SN65LBC179AD (Marked as BL179A)
High-Speed Low-Power LinBiCMOS
Circuitry Designed for Signaling Rates of
up to 30 Mbps
SN65LBC179AP (Marked as 65LBC179A)
SN75LBC179AD (Marked as LB179A)
SN75LBC179AP (Marked as 75LBC179A)
(TOP VIEW)
†
Bus-Pin ESD Protection Exceeds 12 kV
HBM
V
A
B
Z
Y
1
2
3
4
8
7
6
5
CC
R
Very Low Disabled Supply-Current
Requirements . . . 700 µA Max
D
Common-Mode Voltage Range of –7 V
to 12 V
GND
Low Supply Current . . . 15 mA Max
logic diagram (positive logic)
Compatible With ANSI Standard
TIA/EAI-485-A and ISO8482: 1987(E)
8
2
A
B
Positive and Negative Output Current
Limiting
R
D
7
Driver Thermal Shutdown Protection
5
6
3
Y
Z
description
The SN65LBC179A and SN75LBC179A
differential driver and receiver pairs are monolithic
integrated circuits designed for bidirectional data
communication over long cables that take on the
characteristics of transmission lines. They are
balanced, or differential, voltage mode devices
that are compatible with ANSI standard
TIA/EIA-485-A and ISO 8482:1987(E). The A
version offers improved switching performance
over its predecessors without sacrificing
significantly more power.
Function Tables
DRIVER
INPUT
D
OUTPUTS
Y
Z
H
L
Open
H
L
H
L
H
L
RECEIVER
DIFFERENTIAL INPUTS OUTPUT
A–B
≥ 0.2 V
R
H
?
L
H
The SN65LBC179A and SN75LBC179A combine
a differential line driver and differential input line
receiverandoperatefromasingle5-Vsupply. The
driver differential outputs and the receiver
differential inputs are connected to separate
terminals for full-duplex operation and are
designed to present minimum loading to the bus
V
ID
–0.2 V < V < 0.2 V
ID
≤ – 0.2 V
V
ID
Open circuit
H = high level,
? = indeterminate
L = low level,
when powered off (V
= 0). These parts feature a wide positive and negative common-mode voltage range
CC
making them suitable for point-to-point or multipoint data bus applications. The devices also provide positive-
and negative-current limiting and thermal shutdown for protection from line fault conditions.
The SN65LBC179A is characterized over the industrial temperature range of –40°C to 85°C. The
SN75LBC179A is characterized for operation over the commercial temperature range of 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.
†
Signaling rate by TIA/EIA-485-A definition restrict transition times to 30% of the bit length, and much higher signaling rates may be achieved
without this requirement as displayed in the TYPICAL CHARACTERISTICS of this device.
LinBiCMOS is a trademark of Texas Instruments.
Copyright 2001, 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
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
AVAILABLE OPTIONS
PACKAGE
T
A
SMALL OUTLINE
(D)
PLASTIC
DUAL-IN-LINE
0°C to 70°C
SN75LBC179AD
SN65LBC179AD
SN75LBC179AP
SN65LBC179AP
–40°C to 85°C
schematics of inputs and outputs
D Inputs
V
CC
100 kΩ
1 kΩ
Input
8 V
A Input
B Input
V
CC
V
CC
16 V
16 V
100 kΩ
4 kΩ
4 kΩ
18 kΩ
18 kΩ
Input
Input
100 kΩ
4 kΩ
16 V
16 V
4 kΩ
Y AND Z Outputs
V
CC
R Output
V
CC
16 V
Receiver
Receiver
40 Ω
Output
Output
8 V
16 V
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
†
absolute maximum ratings
Supply voltage range, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
CC
Voltage range at A, B, Y, or Z (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10 V to 15 V
Voltage range at D or R (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V + 0.5 V
CC
Electrostatic discharge:Bus terminals and GND, Class 3, A: (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . 12 kV
Bus terminals and GND, Class 3, B: (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . 400 V
All terminals, Class 3, A: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 kV
All terminals, Class 3, B: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 V
Continuous total power dissipation (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
Total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Storage temperature range, T
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
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 I/O bus voltages, are with respect to GND.
2. Tested in accordance with MIL–STD–883C, Method 3015.7
3. The maximum operating junction temperature is internally limited. Uses the dissipation rating table to operate below this
temperature.
DISSIPATION RATING TABLE
‡
T
≤ 25°C
DERATING FACTOR
T
= 70°C
T = 85°C
A
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING POWER RATING
A
D
P
725 mW
5.8 mW/°C
464 mW
640 mW
377 mW
520 mW
1100 mW
8.08 mW/°C
‡
This is the inverse of the junction-to-ambient thermal resistance when board-mounted and with no air flow.
recommended operating conditions
MIN NOM
MAX
UNIT
Supply voltage, V
CC
4.75
2
5
5.25
V
V
V
V
V
High-level input voltage, V
IH
D
D
V
CC
0.8
Low-level input voltage, V
0
IL
Differential input voltage, V (see Note 4)
§
–12
12
12
ID
Voltage at any bus terminal (separately or common-mode), V , V , or V
IC
A, B, Y, or Z
–7
–60
–8
O
I
Y or Z
High-level output current, I
mA
mA
°C
OH
R
Y or Z
60
8
Low-level output current, I
OL
R
SN65LBC179A
SN75LBC179A
–40
85
70
Operating free-air temperature, T
A
0
§
The algebraic convention, in which the least positive (most negative) limit is designated as minimum, is used in this data sheet.
NOTE 4: Differential input/output bus voltage is measured at the noninverting terminal with respect to the inverting terminal.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
driver electrical characteristics over recommended operating conditions (unless otherwise noted)
†
PARAMETER
Input clamp voltage
TEST CONDITIONS
MIN TYP
MAX
UNIT
V
IK
I = –18 mA
–1.5
1
–0.8
1.5
V
I
SN65LBC179A
SN75LBC179A
3
3
R
= 54 Ω,
See Figure 1
L
1.1
1.5
|V
OD
|
Differential output voltage
V
R
–7 <V
See Figure 2
= 60 Ω,
SN65LBC179A
SN75LBC179A
1
1.5
1.5
3
3
L
< 12,
(tot)
1.1
Change in magnitude of differential
output voltage (see Note 5)
∆|V
|
See Figures 1 and 2
–0.2
1.8
0.2
2.8
0.1
10
V
V
V
OD
V
Steady-state common-mode output voltage
2.4
OC(SS)
See Figure 1
Change in steady-state common-mode output
voltage (see Note 5)
∆V
–0.1
OC(SS)
I
I
I
I
I
Output current with power off
High-level input current
Low-level input current
Short-circuit output current
Supply current
V
= 0,
V = –7 V to 12 V
O
–10
–100
–100
–250
±1
µA
µA
O
CC
V = 2.V
IH
IL
I
V = 0.8 V
I
µA
–7 V ≤ V ≤ 12 V
±70
250
15
mA
mA
OS
CC
O
No load,
V = 0 or V
8.5
I
CC
†
All typical values are at V
= 5 V, T = 25°C.
A
CC
NOTE 5: ∆|V
OD
|and∆|V
OC
from a high level to a low level.
|arethechangesinthesteady-statemagnitudeofV
andV ,respectively,thatoccurwhentheinputischanged
OC
OD
driver switching characteristics over recommended operating conditions (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
2
TYP
6
MAX
12
12
1
UNIT
ns
t
t
t
t
t
Propagation delay time, low-to-high-level output
Propagation delay time, high-to-low-level output
PLH
PHL
sk(p)
r
2
6
ns
R
= 54 Ω,
C = 50 pF,
L
L
Pulse skew (| t
– t
|)
0.3
7.5
7.5
ns
PHL PLH
See Figure 3
Differential output signal rise time
Differential output signal fall time
4
4
11
ns
11
ns
f
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
RECEIVER SECTION
receiver electrical characteristics over recommended operating conditions (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
–0.2
4
TYP
MAX
UNIT
V
IT+
V
IT–
V
hys
V
OH
V
OL
Positive-going input threshold voltage
Negative-going input threshold voltage
I
I
= –8 mA
0.2
O
V
= 8 mA
O
Hysteresis voltage (V
IT+
– V
)
50
4.9
mV
V
IT–
High-level output voltage
Low-level output voltage
V
V
V
V
V
V
= 200 mV, I
OH
= –8 mA, See Figure 1
= 8 mA, See Figure 1
ID
ID
IH
IH
IH
IH
= –200 mV, I
0.1
0.8
1
V
OL
= 5 V
= 12 V,
= 12 V,
= –7 V,
= –7 V,
V
0.4
CC
V
= 0
0.5
1
CC
I
I
Bus input current
Other input at 0 V
mA
V
= 5 V
= 0
–0.8
–0.8
–0.4
–0.3
CC
CC
V
receiver switching characteristics over recommended operating conditions (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
7
TYP
13
MAX
20
UNIT
ns
t
t
t
t
t
Propagation delay time, low-to-high-level output
Propagation delay time, high-to-low-level output
PLH
PHL
sk(p)
r
V
ID
= –1.5 V to 1.5 V,
See Figure 4
7
13
20
ns
Pulse skew (| t
– t
|)
0.5
2.1
2.1
1.5
3.3
3.3
ns
PLH PHL
Rise time, output
Fall time, output
ns
See Figure 4
ns
f
PARAMETER MEASUREMENT INFORMATION
Y
27 Ω
D
V
OD
0 V or 3 V
27 Ω
V
OC
Z
Figure 1. Driver V
and V
OC
OD
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
PARAMETER MEASUREMENT INFORMATION
V
(test )
R1
375 Ω
Y
Z
D
R
= 60 Ω
V
OD
L
0 V or 3 V
R2
375 Ω
–7 V < V
(test)
< 12 V
V
(test )
Figure 2. Driver V
With Common-Mode Loading
OD
3 V
Input
1.5 V
1.5 V
C
= 50 pF
L
0 V
(see Note B)
R
= 54 Ω
L
t
t
PHL
PLH
Generator
(see Note A)
Output
50 Ω
≈ 1.5 V
90%
10%
50%
50%
Output
≈ – 1.5 V
t
f
t
r
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t ≤ 6 ns, t ≤ 6 ns,
r
f
Z
C
= 50 Ω.
O
L
B.
includes probe and jig capacitance.
Figure 3. Driver Test Circuits and Voltage Waveforms
3 V
Input
1.5 V
1.5 V
A
B
0 V
Generator
(see Note A)
Output
t
t
PHL
50 Ω
PLH
1.5 V
V
OH
C
= 15 pF
90%
1.3 V
10%
90%
L
(see Note B)
1.3 V
10%
Output
V
OL
t
t
f
r
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, t ≤ 6 ns, t ≤ 6 ns,
r
f
Z
C
= 50 Ω.
O
L
B.
includes probe and jig capacitance.
Figure 4. Receiver Test Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
TYPICAL CHARACTERISTICS
Receiver Output
Driver Input
120 Ω
120 Ω
Driver Input
Receiver Output
Figure 5. Typical Waveform of Non-Return-To-Zero (NRZ), Pseudorandom Binary Sequence (PRBS) Data
at 100 Mbps Through 15m, of CAT 5 Unshielded Twisted Pair (UTP) Cable
TIA/EIA-485-A defines a maximum signaling rate as that in which the transition time of the voltage transition
of a logic-state change remains less than or equal to 30% of the bit length. Transition times of greater length
perform quite well even though they do not meet the standard by definition.
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
TYPICAL CHARACTERISTICS
LOGIC INPUT CURRENT
AVERAGE SUPPLY CURRENT
vs
vs
INPUT VOLTAGE
FREQUENCY
–30
–25
–20
45
40
35
Driver
30
25
–15
–10
20
15
10
Receiver
–5
5
0
0
0
1
2
3
4
5
0.05
0.5
1
2
5
10
20
30
V – Input Voltage – V
f – Frequency – MHz
I
Figure 6
Figure 7
INPUT CURRENT
vs
LOW-LEVEL OUTPUT VOLTAGE
vs
INPUT VOLTAGE
LOW-LEVEL OUTPUT CURRENT
800
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
600
400
200
0
V
= 5
CC
–200
–400
–600
Bus Input Current
–8 –6 –4 –2
0
2
4
6
8
10 12
0
10
I
20
30
40
50
60
70
80
V – Input Voltage – V
– Low-Level Output Current – mA
I
OL
Figure 8
Figure 9
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
TYPICAL CHARACTERISTICS
DRIVER HIGH-LEVEL OUTPUT VOLTAGE
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs
vs
HIGH-LEVEL OUTPUT CURRENT
AVERAGE CASE TEMPERATURE
5
4.5
4
2
V
CC
= 5.25 V
1.5
3.5
3
2.5
1
V
CC
= 5 V
2
V
CC
= 4.75 V
1.5
1
0.5
0
0.5
0
0
–10 –20 –30 –40 –50 –60 –70 –80
–40
0
25
70
85
°
I
– High-Level Output Current – (mA)
Average Case Temperature – C
OH
Figure 10
Figure 11
RECEIVER PROPAGATION TIME
DRIVER PROPAGATION DELAY TIME
vs
vs
CASE TEMPERATURE
CASE TEMPERATURE
13.8
13.7
13.6
7.4
7.2
7
13.5
13.4
6.8
6.6
13.3
13.2
6.4
6.2
13.1
6
13
5.8
5.6
12.9
–40
0
25
70
80
–40
0
25
70
85
°
Case Temperature
C
°
Case Temperature –
C
Figure 12
Figure 13
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
TYPICAL CHARACTERISTICS
DRIVER OUTPUT CURRENT
vs
SUPPLY VOLTAGE
90
65
40
15
I
OH
–10
–35
–60
–85
–110
–135
–160
–185
I
OL
–210
0
3
4
5
6
V
CC – Supply Voltage – V
Figure 14
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
MECHANICAL INFORMATION
D (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0.050 (1,27)
0.020 (0,51)
0.010 (0,25)
M
0.014 (0,35)
14
8
0.008 (0,20) NOM
0.244 (6,20)
0.228 (5,80)
0.157 (4,00)
0.150 (3,81)
Gage Plane
0.010 (0,25)
1
7
0°–8°
0.044 (1,12)
0.016 (0,40)
A
Seating Plane
0.004 (0,10)
0.010 (0,25)
0.004 (0,10)
0.069 (1,75) MAX
PINS **
8
14
16
DIM
0.197
(5,00)
0.344
(8,75)
0.394
(10,00)
A MAX
0.189
(4,80)
0.337
(8,55)
0.386
(9,80)
A MIN
4040047/D 10/96
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
D. Falls within JEDEC MS-012
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
MECHANICAL INFORMATION
P (R-PDIP-T8)
PLASTIC DUAL-IN-LINE
0.400 (10,60)
0.355 (9,02)
8
5
0.260 (6,60)
0.240 (6,10)
1
4
0.070 (1,78) MAX
0.325 (8,26)
0.300 (7,62)
0.020 (0,51) MIN
0.015 (0,38)
Gage Plane
0.200 (5,08) MAX
Seating Plane
0.010 (0,25) NOM
0.125 (3,18) MIN
0.100 (2,54)
0.021 (0,53)
0.430 (10,92)
MAX
0.010 (0,25)
M
0.015 (0,38)
4040082/D 05/98
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001
For the latest package information, go to http://www.ti.com/sc/docs/package/pkg_info.htm
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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