SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Bidirectional Transceivers
D
Meet or Exceed the Requirements of ANSI
Standards TIA/EIA-422-B and TIA/EIA-485-A
and ITU Recommendations V.11 and X.27
D
Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
D
3-State Driver and Receiver Outputs
D
Individual Driver and Receiver Enables
D
Wide Positive and Negative Input/Output
Bus Voltage Ranges
D
Driver Output Capability...±60 mA Max
D
Thermal Shutdown Protection
D
Driver Positive and Negative Current
Limiting
D
Receiver Input Impedance...12 kΩ Min
D
Receiver Input Sensitivity...±200 mV
D
Receiver Input Hysteresis...50 mV Typ
D
Operate From Single 5-V Supply
description
The SN65176B and SN75176B differential bus transceivers are monolithic integrated circuits designed for
bidirectional data communication on multipoint bus transmission lines. They are designed for balanced
transmission lines and meet ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations
V.11 and X.27.
The SN65176B and SN75176B combine a 3-state differential line driver and a differential input line receiver,
both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low
enables, respectively, that can be connected together externally to function as a direction control. The driver
differential outputs and the receiver dif ferential inputs are connected internally to form dif ferential input/output
(I/O) bus ports that are designed to offer minimum loading to the bus when the driver is disabled or VCC = 0.
These ports feature wide positive and negative common-mode voltage ranges, making the device suitable for
party-line applications.
The driver is designed for up to 60 mA of sink or source current. The driver features positive and negative current
limiting and thermal shutdown for protection from line-fault conditions. Thermal shutdown is designed to occur
at a junction temperature of approximately 150°C. The receiver features a minimum input impedance of 12 kΩ,
an input sensitivity of ±200 mV, and a typical input hysteresis of 50 mV.
The SN65176B and SN75176B can be used in transmission-line applications employing the SN75172 and
SN75174 quadruple differential line drivers and SN75173 and SN75175 quadruple differential line receivers.
The SN65176B is characterized for operation from –40°C to 105°C and the SN75176B is characterized for
operation from 0°C to 70°C.
Copyright 1999, 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.
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.
1
2
3
4
8
7
6
5
R
RE
DE
D
VCC
B
A
GND
D OR P PACKAGE
(TOP VIEW)
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Function Tables
DRIVER
INPUT ENABLE OUTPUTS
D DE A B
H H H L
L H L H
X L Z Z
RECEIVER
DIFFERENTIAL INPUTS ENABLE OUTPUT
A–B RE R
VID ≥ 0.2 V L H
–0.2 V < VID < 0.2 V L ?
VID ≤ – 0.2 V L L
X H Z
Open L ?
H = high level, L = low level, ? = indeterminate,
X = irrelevant, Z = high impedance (off)
logic symbol†
RE
DE
1
1
2
B
A
7
6
EN2
EN1
R
D
1
4
2
3
†This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
logic diagram (positive logic)
DE
RE
R
6
7
3
1
2
B
ABus
D4
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
schematics of inputs and outputs
Output
85 Ω
NOM
TYPICAL OF RECEIVER OUTPUT
Input/Output
Port
960 Ω
NOM
16.8 kΩ
NOM
TYPICAL OF A AND B I/O PORTS
Driver input: R(eq) = 3 kΩ NOM
Enable inputs: R(eq )= 8 kΩ NOM
R(eq) = equivalent resistor
R(eq)
VCC
EQUIVALENT OF EACH INPUT
VCC
Input
960 Ω
NOM
VCC
GND
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VCC (see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range at any bus terminal –10 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable input voltage, VI 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θJA (see Note 2): D package 197°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P package 104°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg –65°C to 150°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 af fect device reliability.
NOTES: 1. All voltage values, except differential input/output bus voltage, are with respect to network ground terminal.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
recommended operating conditions
MIN TYP MAX UNIT
Supply voltage, VCC 4.75 5 5.25 V
Voltage at any bus terminal (se
p
arately or common mode) VIor VIC
12
V
Voltage
at
an
y
b
u
s
terminal
(separatel
y
or
common
mode)
,
V
I
or
V
IC –7
V
High-level input voltage, VIH D, DE, and RE 2 V
Low-level input voltage, VIL D, DE, and RE 0.8 V
Differential input voltage, VID (see Note 3) ±12 V
High level out
p
ut current IOH
Driver –60 mA
High
-
le
v
el
o
u
tp
u
t
c
u
rrent
,
I
OH Receiver –400 µA
Low level out
p
ut current IOL
Driver 60
mA
Lo
w-
le
v
el
o
u
tp
u
t
c
u
rrent
,
I
OL Receiver 8
mA
O
p
erating free air tem
p
erature TA
SN65176B –40 105 °
C
Operating
free
-
air
temperat
u
re
,
T
ASN75176B 0 70
°C
NOTE 3: Differential-input/output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B.
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
4POST 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 Input clamp voltage II = –18 mA –1.5 V
VOOutput voltage IO = 0 0 6 V
|VOD1|Differential output voltage IO = 0 1.5 3.6 6 V
|VOD2|Differential output voltage RL = 100 Ω, See Figure 1 1/2 VOD1
or 2V
OD2
g
RL = 54 Ω, See Figure 1 1.5 2.5 5 V
VOD3 Differential output voltage See Note 4 1.5 5 V
∆|VOD|
Change in magnitude of differential output
±02
V
∆|V
OD
|
gg
voltage§
±0
.
2
V
VOC
Common mode out
p
ut voltage
RL=54Ωor 100 Ω
See Figure 1
+3
V
V
OC
Common
-
mode
o
u
tp
u
t
v
oltage
R
L =
54
Ω
or
100
Ω
,
See
Fig
u
re
1
–1
V
∆|VOC|
Change in magnitude of common-mode
±02
V
∆|V
OC
|
gg
output voltage§
±0
.
2
V
IO
Out
p
ut current
Output disabled, VO = 12 V 1
mA
I
O
O
u
tp
u
t
c
u
rrent
,
See Note 5 VO = – 7 V –0.8
mA
IIH High-level input current VI = 2.4 V 20 µA
IIL Low-level input current VI = 0.4 V –400 µA
VO = –7 V –250
IOS
Short circuit out
p
ut current
VO = 0 150
mA
I
OS
Short
-
circ
u
it
o
u
tp
u
t
c
u
rrent
VO = VCC 250
mA
VO = 12 V 250
ICC
Su
pp
ly current (total
p
ackage)
No load
Outputs enabled 42 70
mA
I
CC
S
u
ppl
y
c
u
rrent
(total
package)
No
load
Outputs disabled 26 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-Ω load is either 1/2 VOD1 or 2 V, whichever is greater.
NOTES: 4. See ANSI Standard TIA/EIA-485-A, Figure 3.5, Test Termination Measurement 2.
5. 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, VCC = 5 V, RL = 110 kΩ, TA = 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
td(OD) Differential-output delay time
See Figure 3
15 22 ns
tt(OD) Differential-output transition time
L =
,
See
Fig
u
re
3
20 30 ns
tPZH Output enable time to high level See Figure 4 85 120 ns
tPZL Output enable time to low level See Figure 5 40 60 ns
tPHZ Output disable time from high level See Figure 4 150 250 ns
tPLZ Output disable time from low level See Figure 5 20 30 ns
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SYMBOL EQUIVALENTS
DATA-SHEET PARAMETER TIA/EIA-422-B TIA/EIA-485-A
VOVoa, V ob Voa, Vob
|VOD1| VoVo
|VOD2| Vt (RL = 100 Ω) Vt (RL = 54 Ω)
|VOD3|
V
t
(Test Termination
|V
OD3
|
t(
Measurement 2)
∆|VOD|||V
t
| – |Vt|| ||V
t
– |Vt||
V
OC |Vos||Vos|
∆|VOC||Vos – Vos||Vos – Vos|
IOS |Isa|, |Isb|
IO|Ixa|, |Ixb| Iia, Iib
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
VIT+ Positive-going input threshold voltage VO = 2.7 V, IO = –0.4 mA 0.2 V
VIT– Negative-going input threshold voltage VO = 0.5 V, IO = 8 mA –0.2‡V
Vhys Input hysteresis voltage (VIT+ – VIT–)50 mV
VIK Enable Input clamp voltage II = –18 mA –1.5 V
VOH
High level out
p
ut voltage
V
ID
= 200 mV, I
OH
= –400
µ
A,
27
V
V
OH
High
-
le
v
el
o
u
tp
u
t
v
oltage
ID ,
See Figure 2
OH µ,
2
.
7
V
VOL
Low level out
p
ut voltage
V
ID
= –200 mV, I
OL
= 8 mA,
045
V
V
OL
Lo
w-
le
v
el
o
u
tp
u
t
v
oltage
ID ,
See Figure 2
OL ,
0
.
45
V
IOZ High-impedance-state output current VO = 0.4 V to 2.4 V ±20 µA
II
Line in
p
ut current
Other input = 0 V, VI = 12 V 1
mA
I
I
Line
inp
u
t
c
u
rrent
,
See Note 6 VI = –7 V –0.8
mA
IIH High-level enable input current VIH = 2.7 V 20 µA
IIL Low-level enable input current V IL = 0.4 V –100 µA
rIInput resistance VI = 12 V 12 kΩ
IOS Short-circuit output current –15 –85 mA
ICC
Su
pp
ly current (total
p
ackage)
No load
Outputs enabled 42 55
mA
I
CC
S
u
ppl
y
c
u
rrent
(total
package)
No
load
Outputs disabled 26 35
mA
†All typical values are at VCC = 5 V, TA = 25°C.
‡The algebraic convention, in which the less positive (more negative) limit is designated minimum, is used in this data sheet for common-mode
input voltage and threshold voltage levels only.
NOTE 6: This applies for both power on and power off. Refer to EIA Standard TIA/EIA-485-A for exact conditions.
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
6POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics, VCC = 5 V, CL = 15 pF, TA = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tPLH Propagation delay time, low- to high-level output
VID = 0 to 3 V See Figure 6
21 35 ns
tPHL Propagation delay time, high- to low-level output
V
ID =
0
to
3
V
,
See
Fig
u
re
6
23 35 ns
tPZH Output enable time to high level
See Figure 7
10 20 ns
tPZL Output enable time to low level
See
Fig
u
re
7
12 20 ns
tPHZ Output disable time from high level
See Figure 7
20 35 ns
tPLZ Output disable time from low level
See
Fig
u
re
7
17 25 ns
PARAMETER MEASUREMENT INFORMATION
Figure 1. Driver VOD and VOC
2
RL
VOD2
VOC
2
RL
Figure 2. Receiver VOH and VOL
VID
VOL
VOH
–IOH
+IOL
3 V
VOLTAGE WAVEFORMS
tt(OD)
td(OD)
1.5 V
10%
tt(OD)
≈ 2.5 V
≈– 2.5 V
90%
50%
Output
td(OD)
0 V
3 V
1.5 V
Input
TEST CIRCUIT
Output
CL = 50 pF
(see Note A)
50 ΩRL = 54 Ω
Generator
(see Note B)
50%
10%
NOTES: A. CL includes probe and jig capacitance.
B. 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.
Figure 3. Driver Test Circuit and Voltage Waveforms
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
VOLTAGE WAVEFORMS
tPHZ
1.5 V
2.3 V
0.5 V0 V
3 V
tPZH
Output
Input 1.5 V
S1
0 V or 3 V
Output
CL = 50 pF
(see Note A)
TEST CIRCUIT
50 Ω
VOH
Voff ≈ 0 V
RL = 110 Ω
Generator
(see Note B)
NOTES: A. CL includes probe and jig capacitance.
B. 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.
Figure 4. Driver Test Circuit and Voltage Waveforms
VOLTAGE WAVEFORMS
5 V
VOL
0.5 V
tPZL
3 V
0 V
tPLZ
2.3 V
1.5 V
Output
Input
TEST CIRCUIT
Output
RL = 110 Ω
5 V
S1
CL = 50 pF
(see Note A)
50 Ω
3 V or 0 V
Generator
(see Note B)
1.5 V
NOTES: A. CL includes probe and jig capacitance.
B. 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.
Figure 5. Driver Test Circuit and Voltage Waveforms
VOLTAGE WAVEFORMS
1.3 V
0 V
3 V
VOL
VOH
tPHL
tPLH
1.5 V
Output
Input
TEST CIRCUIT
CL = 15 pF
(see Note A)
Output
0 V
1.5 V
51 Ω
Generator
(see Note B)
1.5 V
1.3 V
NOTES: A. CL includes probe and jig capacitance.
B. 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.
Figure 6. Receiver Test Circuit and Voltage Waveforms
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
8POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
VOH
0.5 V
≈1.3 V
tPHZ
Output
Input 1.5 V
0 V
3 V S1 to 1.5 V
S2 Closed
S3 Closed
tPLZ
≈1.3 V
VOL
0.5 V
Output
Input 1.5 V
0 V
3 V
≈4.5 V
VOL
1.5 V
S3 Open
S2 Closed
S1 to –1.5
V
0 V
1.5 V
3 V
tPZL
Output
Input
0 V
1.5 V
VOH
0 V
Output
Input
tPZH S3 Closed
S2 Open
S1 to 1.5 V
1.5 V
3 V
TEST CIRCUIT
50 Ω
1N916 or Equivalent
S3
5 V
S2
2 kΩ
5 kΩ
S1
–1.5 V
1.5 V
VOLTAGE WAVEFORMS
S1 to –1.5 V
S2 Closed
S3 Closed
Generator
(see Note B)
CL = 15 pF
(see Note A)
NOTES: A. CL includes probe and jig capacitance.
B. 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.
Figure 7. Receiver Test Circuit and Voltage Waveforms
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 8
VOH – High-Level Output Voltage – V
DRIVER
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
VCC = 5 V
4.5
4
3.5
3
2.5
2
1.5
1
0.5
–100–80–60–40–20
0–120
5
IOH – High-Level Output Current – mA
0
VOH
TA = 25°C
Figure 9
DRIVER
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
VCC = 5 V
TA = 25°C
IOL – Low-Level Output Current – mA
0 12020 40 60 80 100
5
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
– Low-Level Output Voltage – V
VOL
VOD – Differential Output Voltage – V
DRIVER
DIFFERENTIAL OUTPUT VOLTAGE
vs
OUTPUT CURRENT
VCC = 5 V
3.5
3
2.5
2
1.5
1
0.5
908070605040302010
0100
4
IO – Output Current – mA
0
VOD
TA = 25°C
Figure 10
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 11
RECEIVER
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
VCC = 5.25 V
VCC = 5 V
VCC = 4.75 V
0 –10 –20 –30 –40 –50
5
0
1
2
3
4
IOH – High-Level Output Current – mA
VOH – High-Level Output Voltage – V
VOH
4.5
3.5
2.5
1.5
0.5
–5 –15 –25 –35 –45
TA = 25°C
VID = 0.2 V
Figure 12
RECEIVER
HIGH-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE †
4
3
2
1
100806040200–20
0120
5
TA – Free-Air Temperature – °C
–40
IOH = –440 µA
VID = 200 mV
VCC = 5 V
VOH – High-Level Output Voltage – V
VOH
4.5
3.5
2.5
1.5
0.5
†Only the 0°C to 70°C portion of the curve applies to the
SN75176B.
Figure 13
RECEIVER
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
TA = 25°C
VCC = 5 V
0.5
0.4
0.3
0.2
0.1
252015105
030
0.6
IOL – Low-Level Output Current – mA
0
VOL – Low-Level Output Voltage – V
VOL
Figure 14
VOL – Low-Level Output Voltage – V
RECEIVER
LOW-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
VID = –200 mV
VCC = 5 V
TA – Free-Air Temperature – °C
0.6
0
0.1
0.2
0.3
0.4
0.5
100806040200–20 120–40
VOL
IOL = 8 mA
SN65176B, SN75176B
DIFFERENTIAL BUS TRANSCEIVERS
SLLS101B – JULY 1985 – REVISED JUNE 1999
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 15
VO – Output Voltage – V
RECEIVER
OUTPUT VOLTAGE
vs
ENABLE VOLTAGE
VCC = 5 V
VCC = 5.25 V
TA = 25°C
VID = 0.2 V
0VI – Enable Voltage – V 30.5 1 1.5 2 2.5
4
3
2
1
0
5
VO
Load = 8 kΩ to GND
VCC = 4.75 V
Figure 16
VO – Output Voltage – V
RECEIVER
OUTPUT VOLTAGE
vs
ENABLE VOLTAGE
5
4
3
2
1
2.521.510.5
03
6
VI – Enable Voltage – V
0
VO
Load = 1 kΩ to VCC
VCC = 5 V
VCC = 5.25 V
TA = 25°C
VID = –0.2 V
VCC = 4.75 V
APPLICATION INFORMATION
Up to 32
Transceivers
SN65176B
SN75176B
SN65176B
SN75176B
RT
RT
NOTE A: The line should be terminated at both ends in its characteristic impedance (RT = ZO). Stub lengths of f the main line should be kept
as short as possible.
Figure 17. Typical Application Circuit
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any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
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
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SN75176B, DIFFERENTIAL BUS TRANSCEIVER
Device Status: Active
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Parameter Name SN75176B
Drivers Per Package 1
Receivers Per Package 1
Driver tpd (ns) 22
Receiver tpd (ns) 35
Supply Voltage(s) (V) 5
ICC (max) (mA) 70
Footprint SN75176
The SN65176B and SN75176B differential bus transceivers are monolithic integrated
circuits designed for bidirectional data communication on multipoint bus transmission lines.
They are designed for balanced transmission lines and meet ANSI Standards TIA/EIA-422-
B and TIA/EIA-485-A and ITU Recommendations V.11 and X.27.
The SN65176B and SN75176B combine a 3-state differential line driver and a differential
input line receiver, both of which operate from a single 5-V power supply. The driver and
receiver have active-high and active-low enables, respectively, that can be connected
together externally to function as a direction control. The driver differential outputs and the
receiver differential inputs are connected internally to form differential input/output (I/O)
bus ports that are designed to offer minimum loading to the bus when the driver is disabled
or VCC = 0. These ports feature wide positive and negative common-mode voltage ranges,
making the device suitable for party-line applications.
The driver is designed for up to 60 mA of sink or source current. The driver features positive
and negative current limiting and thermal shutdown for protection from line-fault
conditions. Thermal shutdown is designed to occur at a junction temperature of
approximately 150°C. The receiver features a minimum input impedance of 12 k , an input
sensitivity of ±200 mV, and a typical input hysteresis of 50 mV.
The SN65176B and SN75176B can be used in transmission-line applications employing the
SN75172 and SN75174 quadruple differential line drivers and SN75173 and SN75175
quadruple differential line receivers.
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Features
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Datasheets
Full datasheet in Acrobat PDF: slls101b.pdf (171 KB)
Full datasheet in Zipped PostScript: slls101b.psz (166 KB)
Pricing/Samples/Availability
Application Reports
l422 AND 485 OVERVIEW AND SYSTEM CONFIGURATIONS (SLLA070 - Updated: 02/15/2000)
lANALOG APPLICATIONS JOURNAL, FEBRUARY 2000 (SLYT012A - Updated: 03/23/2000)
lANALOG APPLICATIONS JOURNAL, NOVEMBER 1999 (SLYT010A - Updated: 03/23/2000)
lCOMPARING BUS SOLUTIONS (SLLA067 - Updated: 03/06/2000)
lELECTROSTATIC DISCHARGE APPLICATION NOTE (SSYA008 - Updated: 05/05/1999)
lINTERFACE CIRCUITS FOR TIA/EIA-485 (SLLA036 - Updated: 03/26/2000)
lJITTER ANALYSIS (SLLA075 - Updated: 03/31/2000)
The SN65176B is characterized for operation from -40°C to 105°C and the SN75176B is
characterized for operation from 0°C to 70°C.
lBidirectional Transceivers
lMeet or Exceed the Requirements of ANSI Standards TIA/EIA-422-B and TIA/EIA-
485-A and ITU Recommendations V.11 and X.27
lDesigned for Multipoint Transmission on Long Bus Lines in Noisy Environments
l3-State Driver and Receiver Outputs
lIndividual Driver and Receiver Enables
lWide Positive and Negative Input/Output Bus Voltage Ranges
lDriver Output Capability...±60 mA Max
lThermal Shutdown Protection
lDriver Positive and Negative Current Limiting
lReceiver Input Impedance...12 k Min
lReceiver Input Sensitivity...±200 mV
lReceiver Input Hysteresis...50 mV Typ
lOperate From Single 5-V Supply
Orderable Device Package Pins Temp (ºC) Status Price/unit
USD (100-999) Pack Qty Availability / Samples
SN75176BD D80 TO 70 ACTIVE 1.00 75 Check stock or order
SN75176BDR D80 TO 70 ACTIVE 0.84 2500 Check stock or order
SN75176BP P80 TO 70 ACTIVE 1.00 50 Check stock or order
SN75176BPS PS 80 TO 70 ACTIVE Check stock or order
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lSKEW DEFINITIONS (SLLA060 - Updated: 08/13/1999)
lTHERMAL CHARACTERISTICS OF LINEAR AND LOGIC PACKAGES USING JEDEC PCB
DESIGNS (SZZA017A - Updated: 09/15/1999)
Related Documents
lA STATISTICAL SURVEY OF COMMON-MODE NOISE (SLLA057, 131 KB - Updated: 12/23/1999)
Table Data Updated on: 6/2/2000
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