TI SN75LBC179AD

SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
D
D
D
D
D
D
D
D
High-Speed Low-Power LinBiCMOS
Circuitry Designed for Signaling Rates† of
up to 30 Mbps
Bus-Pin ESD Protection Exceeds 12 kV
HBM
Very Low Disabled Supply-Current
Requirements . . . 700 µA Max
Common-Mode Voltage Range of – 7 V
to 12 V
Low Supply Current . . . 15 mA Max
Compatible With ANSI Standard
TIA/EAI-485-A and ISO8482: 1987(E)
Positive and Negative Output Current
Limiting
Driver Thermal Shutdown Protection
SN65LBC179AD (Marked as BL179A)
SN65LBC179AP (Marked as 65LBC179A)
SN75LBC179AD (Marked as LB179A)
SN75LBC179AP (Marked as 75LBC179A)
(TOP VIEW)
VCC
R
D
GND
8
2
7
3
6
4
5
A
B
Z
Y
logic diagram (positive logic)
R
D
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.
1
8
2
7
5
3
6
A
B
Y
Z
Function Tables
DRIVER
INPUT
D
H
L
Open
OUTPUTS
Y
Z
H
L
H
L
H
L
RECEIVER
DIFFERENTIAL INPUTS OUTPUT
R
A–B
The SN65LBC179A and SN75LBC179A combine
H
VID ≥ 0.2 V
a differential line driver and differential input line
?
– 0.2 V < VID < 0.2 V
receiver and operate from a single 5-V supply. The
L
VID ≤ – 0.2 V
driver differential outputs and the receiver
H
Open circuit
differential inputs are connected to separate
H = high level,
L = low level,
terminals for full-duplex operation and are
? = indeterminate
designed to present minimum loading to the bus
when powered off (VCC = 0). These parts feature a wide positive and negative common-mode voltage range
making them suitable for point-to-point or multipoint data bus applications. The devices also provide positiveand 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.
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SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
AVAILABLE OPTIONS
PACKAGE
TA
SMALL OUTLINE
(D)
PLASTIC
DUAL-IN-LINE
0°C to 70°C
SN75LBC179AD
SN75LBC179AP
– 40°C to 85°C
SN65LBC179AD
SN65LBC179AP
schematics of inputs and outputs
D Inputs
VCC
100 kΩ
1 kΩ
Input
8V
A Input
B Input
VCC
16 V
100 kΩ
VCC
16 V
4 kΩ
4 kΩ
18 kΩ
18 kΩ
Input
Input
100 kΩ
16 V
16 V
4 kΩ
4 kΩ
Y AND Z Outputs
VCC
R Output
VCC
16 V
Receiver
40 Ω
Output
Output
8V
16 V
Receiver
2
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SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
absolute maximum ratings†
Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 6 V
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 VCC + 0.5 V
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, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
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 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
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR‡
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
377 mW
D
725 mW
5.8 mW/°C
464 mW
P
1100 mW
8.08 mW/°C
640 mW
520 mW
‡ This is the inverse of the junction-to-ambient thermal resistance when board-mounted and with no air flow.
recommended operating conditions
Supply voltage, VCC
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
VCC
0.8
V
12
V
12
V
High-level input voltage, VIH
D
2
Low-level input voltage, VIL
D
0
§
– 12
Differential input voltage, VID (see Note 4)
Voltage at any bus terminal (separately or common-mode), VO, VI, or VIC
A, B, Y, or Z
Y or Z
High level output current,
High-level
current IOH
R
–7
–60
60
R
free air temperature,
temperature TA
Operating free-air
mA
–8
Y or Z
Low level output current
Low-level
current, IOL
V
8
SN65LBC179A
– 40
85
SN75LBC179A
0
70
mA
°C
§ 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.
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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
VIK
TEST CONDITIONS
Input clamp voltage
| VOD |
II = – 18 mA
Differential output voltage
∆| VOD |
Change in magnitude of differential
output voltage (see Note 5)
VOC(SS)
Steady-state common-mode output voltage
–0.8
MAX
1
1.5
3
SN75LBC179A
1.1
1.5
3
RL = 60 Ω,
–7
7 <V((tot)) < 12
12,
See Figure 2
SN65LBC179A
1
1.5
3
SN75LBC179A
1.1
1.5
3
See Figures 1 and 2
–0.2
1.8
Change in steady-state common-mode output
voltage (see Note 5)
IO
IIH
Output current with power off
VCC = 0,
VI = 2.V
IIL
IOS
Low-level input current
2.4
–0.1
VO = – 7 V to 12 V
VI = 0.8 V
– 7 V ≤ VO ≤ 12 V
–10
±1
UNIT
V
SN65LBC179A
∆VOC (SS)
Short-circuit output current
TYP†
RL = 54 Ω,,
See Figure 1
See Figure 1
High-level input current
MIN
–1.5
V
0.2
V
2.8
V
0.1
V
10
µA
– 100
µA
– 100
µA
–250
± 70
250
mA
ICC
Supply current
No load,
VI = 0 or VCC
8.5
15
mA
† All typical values are at VCC = 5 V, TA = 25°C.
NOTE 5: ∆ | VOD | and ∆ | VOC | are the changes in the steady-state magnitude of VOD and VOC, respectively, that occur when the input is changed
from a high level to a low level.
driver switching characteristics over recommended operating conditions (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tPLH
tPHL
Propagation delay time, low-to-high-level output
2
6
12
ns
Propagation delay time, high-to-low-level output
2
6
12
ns
tsk(p)
tr
Pulse skew ( | tPHL – tPLH | )
0.3
1
ns
Differential output signal rise time
4
7.5
11
ns
tf
Differential output signal fall time
4
7.5
11
ns
4
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RL = 54 Ω
Ω,
See Figure 3
• DALLAS, TEXAS 75265
CL = 50 pF,
F
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
VIT +
VIT –
Positive-going input threshold voltage
Vhys
VOH
Hysteresis voltage ( VIT + – VIT –)
VOL
Low-level output voltage
II
MIN
TYP
IO = – 8 mA
Negative-going input threshold voltage
0.2
– 0.2
IO = 8 mA
High-level output voltage
50
VID = 200 mV, IOH = – 8 mA, See Figure 1
VID = – 200 mV, IOL = 8 mA, See Figure 1
VIH = 12 V,
VIH = 12 V,
Bus input current
MAX
4
4.9
V
0.8
VCC = 5 V
0.4
1
VCC = 0
0.5
1
Other input at 0 V
VCC = 5 V
VCC = 0
–0.8
– 0.4
–0.8
– 0.3
V
mV
0.1
VIH = – 7 V,
VIH = – 7 V,
UNIT
V
mA
receiver switching characteristics over recommended operating conditions (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
tPLH
tPHL
Propagation delay time, low-to-high-level output
tsk(p)
tr
Pulse skew ( | tPLH – tPHL | )
tf
Fall time, output
Propagation delay time, high-to-low-level output
Rise time, output
VID = –1.5 V to 1.5 V,
See Figure 4
See Figure 4
MIN
TYP
MAX
UNIT
7
13
20
ns
7
13
20
ns
0.5
1.5
ns
2.1
3.3
ns
2.1
3.3
ns
PARAMETER MEASUREMENT INFORMATION
Y
27 Ω
D
VOD
0 V or 3 V
27 Ω
VOC
Z
Figure 1. Driver VOD and VOC
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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
D
RL = 60 Ω
0 V or 3 V
VOD
Z
R2
375 Ω
– 7 V < V(test) < 12 V
V(test )
Figure 2. Driver VOD With Common-Mode Loading
3V
Input
Generator
(see Note A)
RL = 54 Ω
50 Ω
1.5 V
CL = 50 pF
(see Note B)
1.5 V
0V
tPLH
Output
tPHL
50%
Output
≈ 1.5 V
50%
90%
10%
≈ – 1.5 V
tf
VOLTAGE WAVEFORMS
tr
TEST CIRCUIT
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns,
ZO = 50 Ω.
B. CL includes probe and jig capacitance.
Figure 3. Driver Test Circuits and Voltage Waveforms
3V
Input
1.5 V
A
Generator
(see Note A)
50 Ω
1.5 V
0V
Output
B
tPLH
tPHL
1.5 V
CL = 15 pF
(see Note B)
Output
90%
1.3 V
10%
tr
TEST CIRCUIT
VOH
90%
1.3 V
10%
VOL
tf
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns,
ZO = 50 Ω.
B. CL includes probe and jig capacitance.
Figure 4. Receiver Test Circuit and Voltage Waveforms
6
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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.
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SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
TYPICAL CHARACTERISTICS
LOGIC INPUT CURRENT
vs
INPUT VOLTAGE
AVERAGE SUPPLY CURRENT
vs
FREQUENCY
–30
45
Driver
–25
35
II – Logic Input Current – µ A
I CC – Average Supply Current – mA
40
30
25
20
15
Receiver
10
–20
–15
–10
–5
5
0
0.05
0.5
1
2
5
10
20
0
30
0
1
2
Figure 6
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
800
2.00
600
1.75
VOL – Low-Level Output Voltage – V
II – Input Current – µ A
5
Figure 7
INPUT CURRENT
vs
INPUT VOLTAGE
400
200
0
–200
Bus Input Current
–400
1.50
VCC = 5
1.25
1.00
0.75
0.50
0.25
–600
0
–8
–6
–4
–2
0
2
4
6
8
10
12
VI – Input Voltage – V
0
10
20
30
40
50
60
70
IOL – Low-Level Output Current – mA
Figure 8
8
4
3
VI – Input Voltage – V
f – Frequency – MHz
Figure 9
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SN65LBC179A, SN75LBC179A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS377C – MAY 2000 – REVISED JUNE 2001
TYPICAL CHARACTERISTICS
DRIVER HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs
AVERAGE CASE TEMPERATURE
2
VOD – Driver Differential Output Voltage – V
VOH – Driver High-Level Output Voltage – V
5
4.5
4
VCC = 5.25 V
3.5
3
2.5
VCC = 5 V
2
VCC = 4.75 V
1.5
1
0.5
0
1.5
1
0.5
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–40
0
25
Figure 10
DRIVER PROPAGATION DELAY TIME
vs
CASE TEMPERATURE
13.8
7.4
TPHL – Driver Propagation Delay Time – ns
13.7
T PHL – Receiver Propagation Time – ns
85
Figure 11
RECEIVER PROPAGATION TIME
vs
CASE TEMPERATURE
13.6
13.5
13.4
13.3
13.2
13.1
13
12.9
–40
70
Average Case Temperature – ° C
IOH – High-Level Output Current – (mA)
0
25
70
80
Case Temperature ° C
7.2
7
6.8
6.6
6.4
6.2
6
5.8
5.6
–40
0
25
70
85
Case Temperature – ° C
Figure 12
Figure 13
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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
IO – Driver Output Current – mA
65
40
15
IOH
–10
–35
–60
–85
–110
–135
IOL
–160
–185
–210
0
3
5
4
VCC – Supply Voltage – V
Figure 14
10
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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)
0.014 (0,35)
14
0.010 (0,25) M
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°
A
0.044 (1,12)
0.016 (0,40)
Seating Plane
0.069 (1,75) MAX
0.010 (0,25)
0.004 (0,10)
PINS **
0.004 (0,10)
8
14
16
A MAX
0.197
(5,00)
0.344
(8,75)
0.394
(10,00)
A MIN
0.189
(4,80)
0.337
(8,55)
0.386
(9,80)
DIM
4040047 / D 10/96
NOTES: A.
B.
C.
D.
All linear dimensions are in inches (millimeters).
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
Falls within JEDEC MS-012
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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)
0.015 (0,38)
0.430 (10,92)
MAX
0.010 (0,25) M
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
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