SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
D
D
D
D
D
D
D
N PACKAGE
(TOP VIEW)
Meets or Exceeds the Standard EIA-485
Designed for High-Speed Multipoint
Transmission on Long Bus Lines in Noisy
Environments
Supports Data Rates up to and Exceeding
Ten Million Transfers Per Second
Common-Mode Output Voltage Range of
– 7 V to 12 V
Positive- and Negative-Current Limiting
Low Power Consumption . . . 1.5 mA Max
(Output Disabled)
Functionally Interchangeable With SN75174
1A
1Y
1Z
1,2EN
2Z
2Y
2A
GND
Both the SN65LBC174 and SN75LBC174 provide
positive- and negative-current limiting and
thermal shutdown for protection from line fault
conditions on the transmission bus line. These
devices offer optimum performance when used
with the SN75LBC173 or SN75LBC175
quadruple line receivers. The SN65LBC174 and
SN75LBC174 are available in the 16-terminal DIP
package (N) and the 20-terminal wide-body small
outline intergrated circuit (SOIC) package (DW).
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
VCC
4A
4Y
4Z
3,4EN
3Z
3Y
3A
DW PACKAGE
(TOP VIEW)
description
The SN65LBC174 and SN75LBC174 are
monolithic, quadruple, differential line drivers with
3-state outputs. Both devices are designed to
meet the requirements of the Electronics Industry
Association Standard EIA-485. These devices
are optimized for balanced multipoint bus
transmission at data rates up to and exceeding
10 million bits per second. Each driver features
wide positive and negative common-mode output
voltage ranges, current limiting, and thermalshutdown protection, making it suitable for
party-line applications in noisy environments.
Both devices are designed using LinBiCMOS,
facilitating ultralow power consumption and
inherent robustness.
1
1
2
3
4
5
6
7
8
9
10
1A
1Y
NC
1Z
1,2EN
2Z
NC
2Y
2A
GND
20
19
18
17
16
15
14
13
12
11
VCC
4A
4Y
NC
4Z
3,4EN
3Z
NC
3Y
3A
NC – No internal connection
FUNCTION TABLE
(each driver)
INPUT
ENABLE
H
L
X
H
H
L
H = high level,
X = irrelevant,
OUTPUTS
Y
Z
H
L
Z
L
H
Z
L = low level,
Z = high impedance (off)
The SN75LBC174 is characterized for operation over the commercial temperature range of 0°C to 70°C. The
SN65LBC174 is characterized over the industrial temperature range of – 40°C to 85°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.
LinBiCMOS is a trademark of Texas Instruments Incorporated.
Copyright 2001–2003, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
logic symbol†
1, 2EN
1A
2A
3, 4EN
3A
4A
4
logic diagram (positive logic)
1A
2
1
3
6
7
12
2
1
EN
5
3
1Y
1, 2EN
1Z
6
7
2Y
2A
5
2Z
10
9
11
3A
9
11
14
15
13
1Z
4
EN
10
1Y
2Y
2Z
3Y
3Z
12
3Y
3,4EN
3Z
14
15
4A
4Y
13
4Y
4Z
4Z
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Terminal numbers shown are for the N package.
schematic of inputs and outputs
ALL INPUTS
Y OR Z OUTPUT
VCC
VCC
50 µA
200 Ω
Output
Input
Driver
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
absolute maximum ratings over operating free-air temperature (unless otherwise noted)†
Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Output voltage range, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 10 V to 15 V
Voltage range at A, 1/2EN, 3/4EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to VCC +0.5 V
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited‡
Operating free-air temperature range, TA: SN65LBC174 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°C
SN75LBC174 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
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.
‡ The maximum operating junction temperature is internally limited. Use the Dissipation Rating Table to operate below this temperature.
NOTE 1: All voltage values are with respect to GND.
recommended operating conditions
Supply voltage, VCC
High-level input voltage, VIH
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
2
Low-level input voltage, VIL
V
0.8
Voltage at any bus terminal (separately or common-mode), VO
Y or Z
High-level output current, IOH
Y or Z
Low-level output current, IOL
Y or Z
12
–7
Continuous total power dissipation
V
V
– 60
mA
60
mA
See Dissipation Rating Table
Operating free-air temperature, TA
SN65LBC174
– 40
85
SN75LBC174
0
70
°C
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
DW
1125 mW
9.0 mW/°C
720 mW
585 mW
N
1150 mW
9.2 mW/°C
736 mW
598 mW
POST OFFICE BOX 655303
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3
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
VIK
TEST CONDITIONS
Input clamp voltage
MIN
TYP†
II = – 18 mA
|VOD|
Differential output voltage‡
∆|VOD|
Change in magnitude of common-mode output voltage§
VOC
Common-mode output voltage
∆|VOC|
Change in magnitude of common-mode output voltage§
IO
IOZ
Output current with power off
IIH
IIL
High-level input current
IOS
Short-circuit output current
ICC
Supply current (all drivers)
Low-level input current
UNIT
– 1.5
V
RL = 54 Ω,,
See Figure 1
SN65LBC174
1.1
1.8
5
SN75LBC174
1.5
1.8
5
RL = 60 Ω,,
See Figure 2
SN65LBC174
1.1
1.7
5
SN75LBC174
1.5
1.7
RL = 54 Ω,,
High-impedance-state output current
MAX
See Figure 1
V
5
± 0.2
V
3
–1
V
± 0.2
V
VCC = 0,
VO = – 7 V to 12 V
VO = – 7 V to 12 V
± 100
µA
± 100
µA
VI = 2.4 V
VI = 0.4 V
– 100
µA
– 100
µA
VO = – 7 V to 12 V
Outputs enabled
No load
Outputs disabled
± 250
mA
7
1.5
mA
† All typical values are at VCC = 5 V and TA = 25°C.
‡ The minimum VOD specification does not fully comply with EIA-485 at operating temperatures below 0°C. The lower output signal should be used
to determine the maximum signal transmission distance.
§ ∆|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.
switching characteristics, VCC = 5 V, TA = 25°C
PARAMETER
td(OD)
tt(OD)
Differential output delay time
tPZH
tPZL
tPHZ
tPLZ
4
TEST CONDITIONS
MIN
TYP
MAX
2
11
20
UNIT
ns
10
RL = 54 Ω,
See Figure 3
15
25
ns
Output enable time to high level
RL = 110 Ω,
See Figure 3
20
30
ns
Output enable time to low level
RL = 110 Ω,
See Figure 5
21
30
ns
Output disable time from high level
RL = 110 Ω,
See Figure 4
48
70
ns
Output disable time from low level
RL = 110 Ω,
See Figure 5
21
30
ns
Differential output transition time
POST OFFICE BOX 655303
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SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
PARAMETER MEASUREMENT INFORMATION
RL
2
VOD2
RL
2
VOC
Figure 1. Differential and Common-Mode Output Voltages
Vtest
R1 = 375 Ω
Y
0 V or 3 V
A
RL = 60 Ω
VOD
Z
R2 = 375 Ω
EN at 5 V
Vtest
– 7 V < Vtest < 12 V
Figure 2. Driver VOD Test Circuit
3V
Input
Input
Generator
(see Note A)
1.5 V
1.5 V
RL = 54 Ω
CL = 50 pF
(see Note B)
50 Ω
0V
Output
td(OD)
td(OD)
Output
50%
90%
≈ 2.5 V
50%
10%
3V
tt(OD)
TEST CIRCUIT
≈ – 2.5 V
tt(OD)
VOLTAGE WAVEFORMS
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, duty cycle = 50%, tr ≤ 5 ns,
tf ≤ 5 ns, ZO = 50 Ω.
B. CL includes probe and stray capacitance.
Figure 3. Time Waveforms for Driver Differential Output Test Circuit Delay and Transition
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
PARAMETER MEASUREMENT INFORMATION
1.5 V
0V
Input
50 Ω
1.5 V
Output
3 V or 0 V
Generator
(see Note A)
3V
Input
S1
CL = 50 pF
(see Note B)
RL = 110 Ω
0.5 V
tPZH
VOH
Output
2.3 V
Voff ≈ 0 V
tPHZ
TEST CIRCUIT
VOLTAGE WAVEFORMS
Figure 4. tPZH and tPHZ Test Circuit and Waveforms
5V
3V
Input
RL = 110 Ω
S1
1.5 V
1.5 V
0V
tPZL
Output
0 V or 3 V
tPLZ
CL = 50 pF
(see Note B)
Input
Generator
(see Note A)
2.3 V
Output
5V
0.5 V
VOL
50 Ω
VOLTAGE WAVEFORMS
TEST CIRCUIT
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, duty cycle = 50%, tr ≤ 5 ns,
tf ≤ 5 ns, ZO = 50 Ω.
B. CL includes probe and stray capacitance.
Figure 5. tPZL and tPLZ Test Circuit and Waveforms
6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
TYPICAL CHARACTERISTICS
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
OUTPUT CURRENT
vs
OUTPUT VOLTAGE
5
50
Output Disabled
TA = 25°C
ÁÁ
ÁÁ
ÁÁ
4.5
VOL – Low-Level Output Voltage – V
IIO
O – Output Current – µ A
40
30
20
10
0
– 10
VCC = 0 V
– 20
– 30
VCC = 5 V
VCC = 5 V
TA = 25°C
4
3.5
3
2.5
2
1.5
1
0.5
– 40
– 50
– 25 – 20 – 15 – 10 – 5
0
5
10
15
20
0
– 20
25
VO – Output Voltage – V
0
20
40
100
60
80
IOL – Low-Level Output Current – mA
Figure 6
Figure 7
DIFFERENTIAL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
3
5
VOH – High-Level Output Voltage – V
VOD – Differential Output Voltage – V
RL = 54 Ω
VCC = 5 V
ÁÁ
ÁÁ
2.5
2
1.5
1
0.5
0
– 60
120
VCC = 5 V
TA = 25°C
4.5
4
3.5
3
2.5
2
1.5
– 40
– 20
0
20
40
60
80
100
TA – Free-Air Temperature – °C
20
0
– 20
– 40
– 60
– 80
– 100 – 120
IOH – High-Level Output Current – mA
Figure 8
Figure 9
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162D – JULY 1993 – REVISED SEPTEMBER 2003
TYPICAL CHARACTERISTICS
PROPAGATION DELAY TIME,
DIFFERENTIAL OUTPUT
vs
FREE-AIR TEMPERATURE
DIFFERENTIAL OUTPUT VOLTAGE
vs
OUTPUT CURRENT
14
VCC = 5 V
TA = 25°C
13
2.5
t pd(OD) – Propagation Delay Time,
Differential Output – ns
VOD – Differential Output Voltage – V
3
2
1.5
1
0.5
12
RL = 54 Ω
CL = 50 pF
VCC = 5 V
11
10
9
8
7
6
5
0
4
0
10
20
30
40
50
60
70
80
90
100
– 60 – 40 – 20
Figure 10
8
0
20
Figure 11
POST OFFICE BOX 655303
40
60
TA – Free-Air Temperature – °C
IO – Output Current – mA
• DALLAS, TEXAS 75265
80
100
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
(3)
Device Marking
(4/5)
(6)
SN65LBC174DW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
SN65LBC174
SN65LBC174DWR
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
SN65LBC174
SN65LBC174N
ACTIVE
PDIP
N
16
25
RoHS & Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN65LBC174N
SN75LBC174DW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
SN75LBC174
SN75LBC174DWR
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
SN75LBC174
SN75LBC174N
ACTIVE
PDIP
N
16
25
RoHS & Green
NIPDAU
N / A for Pkg Type
0 to 70
SN75LBC174N
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of