Texas Instruments SN65LBC174N, SN65LBC174DW, SN65LBC174DWR, SN75LBC174DW, SN75LBC174DWR Datasheet
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SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162A – JULY 1993 – REVISED NOVEMBER 1998
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Meets or Exceeds the Standard EIA-485
D
Designed for High-Speed Multipoint
Transmission on Long Bus Lines in Noisy
Environments
D
Supports Data Rates up to and Exceeding
Ten Million Transfers Per Second
D
Common-Mode Output Voltage Range of
–7 V to 12 V
D
Positive- and Negative-Current Limiting
D
Low Power Consumption...1.5 mA Max
(Output Disabled)
D
Functionally Interchangeable With SN75174
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 ultra-low power consumption and
inherent robustness.
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).
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.
LinBiCMOS is a trademark of Texas Instruments Incorporated.
Copyright 1998, 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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2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1A
1Y
1Z
1,2EN
2Z
2Y
2A
GND
V
CC
4A
4Y
4Z
3,4EN
3Z
3Y
3A
N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1A
1Y
NC
1Z
1,2EN
2Z
NC
2Y
2A
GND
V
CC
4A
4Y
NC
4Z
3,4EN
3Z
NC
3Y
3A
DW PACKAGE
(TOP VIEW)
NC – No internal connection
FUNCTION TABLE
(each driver)
INPUT ENABLE
OUTPUTS
YZ
H
L
X
H = high level, L = low level,
X = irrelevant, Z = high impedance (off)
H
H
L
HL
LH
ZZ
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.
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162A – JULY 1993 – REVISED NOVEMBER 1998
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol
†
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Terminal numbers shown are for the N package.
EN
EN
4A
3A
3,4EN
2A
1A
1,2EN
15
9
12
7
1
4
4Z
4Y
3Z
3Y
2Z
2Y
1Z
1Y
13
14
11
10
5
6
3
2
logic diagram (positive logic)
1A
1Y
1Z
2A
2Y
2Z
1,2EN
3A
3Y
3Z
4A
4Y
4Z
3,4EN
1
4
7
9
12
15
13
14
11
10
5
6
3
2
schematic of inputs and outputs
Input
50 µA
V
CC
Driver
Output
V
CC
200 Ω
ALL INPUTS Y OR Z OUTPUT
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162A – JULY 1993 – REVISED NOVEMBER 1998
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
†
Supply voltage range, V
CC
(see Note 1) –0.3 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
–10 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
–0.3 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation Internally limited
‡
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN65LBC174 –40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN75LBC174 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–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
MIN NOM MAX UNIT
Supply voltage, V
CC
4.75 5 5.25 V
High-level input voltage, V
IH
2 V
Low-level input voltage, V
IL
0.8 V
p
12
Voltage at any bus terminal (separately or common-mode), V
O
Y or Z–7V
High-level output current, I
OH
Y or Z –60 mA
Low-level output current, I
OL
Y or Z 60 mA
Continuous total power dissipation See Dissipation Rating Table
p
p
SN65LBC174 –40 85
°
Operating free-air temperature, T
A
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
SN65LBC174, SN75LBC174
QUADRUPLE LOW-POWER DIFFERENTIAL LINE DRIVERS
SLLS162A – JULY 1993 – REVISED NOVEMBER 1998
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT
V
IK
Input clamp voltage II = –18 mA –1.5 V
R
= 54 Ω,
SN65LBC174 1.1 1.8 5
L
,
See Figure 1
SN75LBC174 1.5 1.8 5
|VOD|
Diff
erential output voltage
‡
R
= 60 Ω,
SN65LBC174 1.1 1.7 5
V
L
,
See Figure 2
SN75LBC174 1.5 1.7 5
∆|VOD|
Change in magnitude of common-mode output voltage
§
±0.2 V
3
V
OC
C
ommon-mode output voltage
R
L
= 54 Ω,
See Figure 1
–1
V
∆|VOC|
Change in magnitude of common-mode output voltage
§
±0.2 V
I
O
Output current with power off VCC = 0, VO = – 7 V to 12 V ±100 µA
I
OZ
High-impedance-state output current VO = – 7 V to 12 V ±100 µA
I
IH
High-level input current VI = 2.4 V –100 µA
I
IL
Low-level input current VI = 0.4 V –100 µA
I
OS
Short-circuit output current VO = –7 V to 12 V ±250 mA
pp
Outputs enabled 7
ICCSupply current (all drivers)
No load
Outputs disabled 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 TEST CONDITIONS MIN TYP MAX UNIT
t
d(OD)
Differential output delay time
2 11 20 ns
t
t(OD)
Differential output transition time
R
L
= 54 Ω,
See Figure 3
10 15 25 ns
t
PZH
Output enable time to high level RL = 110 Ω, See Figure 3 30 ns
t
PZL
Output enable time to low level RL = 110 Ω, See Figure 5 30 ns
t
PHZ
Output disable time from high level RL = 110 Ω, See Figure 4 50 ns
t
PLZ
Output disable time from low level RL = 110 Ω, See Figure 5 30 ns
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