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SLLS446C − OCTOBER 2000 − REVISED MAY 2003
D
D
D
D
Designed for TIA/EIA-485, TIA/EIA-422 and
ISO 8482 Applications
D
D
Driver Positive- and Negative-Current
Limiting
†
Signaling Rates up to 30 Mbps
Power-Up and Power-Down Glitch-Free for
Line Insertion Applications
Propagation Delay Times < 11 ns
D
Thermal Shutdown Protection
Low Standby Power Consumption
1.5 mA Max
D
Industry Standard Pin-Out, Compatible
With SN75174, MC3487, DS96174, LTC487,
and MAX3042
D
Output ESD Protection Exceeds 13 kV
description
The SN65LBC174A and SN75LBC174A are quadruple differential line drivers with 3-state outputs, designed
for TIA/EIA-485 (RS-485), TIA/EIA-422 (RS-422), and ISO 8482 applications.
These devices are optimized for balanced multipoint bus transmission at signalling rates up to 30 million bits
per second. The transmission media may be printed-circuit board traces, backplanes, or cables. The ultimate
rate and distance of data transfer is dependent upon the attenuation characteristics of the media and the noise
coupling to the environment.
N PACKAGE
(TOP VIEW)
16-DW PACKAGE
(TOP VIEW)
logic diagram (positive logic)
2
1Y
1
2
3
4
5
6
7
8
16
1
4
7
1A
1Y
1Z
V
CC
4A
4Y
4Z
3,4EN
3Z
N3Y
3A
1A
1Y
V
CC
4A
1
2
3
4
5
6
7
8
16
15
14
13
12
1A
1,2EN
2A
3
15
14
13
12
11
10
9
1Z
1Z
4Y
6
5
2Y
2Z
1,2EN
2Z
2Y
2A
GND
1,2EN
2Z
4Z
3,4EN
2Y
11 3Z
10 3Y
10
11
3Y
3Z
9
2A
3A
3,4EN
4A
GND
9
3A
12
15
14
13
4Y
4Z
20-DW PACKAGE
(TOP VIEW)
logic diagram (positive logic)
2
1
2
3
4
5
6
7
8
9
10
20
1A
1Y
NC
1Z
V
CC
4A
4Y
NC
4Z
3,4EN
3Z
NC
3Y
1Y
1
1A
19
18
17
16
15
14
13
12
11
4
1Z
5
1,2EN
8
2Y
9
2A
1,2EN
2Z
NC
2Y
2A
GND
6
2Z
12
3Y
11
3A
14
3Z
15
3,4EN
3A
18
4Y
19
4A
16
4Z
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.
†
The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).
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Copyright 2001 − 20003, Texas Instruments Incorporated
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