MC75174B Motorola, MC75174B Datasheet

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MC75174B

Manufacturer Part Number
MC75174B
Description
(MC75172B / MC75174B) QUAD EIA-485 LINE DRIVERS
Manufacturer
Motorola
Datasheet

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Quad EIA-485 Line Drivers
with Three-State Outputs
speed drivers designed to comply with the EIA–485 Standard. Features
include three–state outputs, thermal shutdown, and output current limiting in
both directions. These devices also comply with EIA–422–A, and CCITT
Recommendations V.11 and X.27.
transmission at rates in excess of 10 MBPS. The outputs feature wide
common mode voltage range, making them suitable for party line
applications in noisy environments. The current limit and thermal shutdown
features protect the devices from line fault conditions. These devices offer
optimum performance when used with the MC75173 and MC75175 line
receivers.
surface mount packages.
Gnd
MOTOROLA ANALOG IC DEVICE DATA
En
1A
1Y
1Z
2Z
2Y
2A
Applications
The Motorola MC75172B/174B Quad Line drivers are differential high
The MC75172B/174B are optimized for balanced multipoint bus
Both devices are available in 16–pin plastic DIP and 20–pin wide body
Meets EIA–485 Standard for Party Line Operation
Meets EIA–422–A and CCITT Recommendations V.11 and X.27
Operating Ambient Temperature: –40 C to +85 C
High Impedance Outputs
Common Mode Output Voltage Range: –7 to 12 V
Positive and Negative Current Limiting
Transmission Rates in Excess of 10 MBPS
Thermal Shutdown at 150 C Junction Temperature, ( 20 C)
Single 5.0 V Supply
Pin Compatible with TI SN75172/4 and NS A96172/4
Interchangeable with MC3487 and AM26LS31 for EIA–422–A
1
2
3
4
5
6
7
8
P Package
16
15
14
13
12
11
10
MC75172B
9
V CC
4A
4Y
4Z
En
3Z
3Y
3A
Gnd
NC
NC
1A
1Y 2
1Z
En
2Z
2Y
2A
10
1
3
4
5
6
7
8
9
DW Package
PIN CONNECTIONS
20
19
18
17
16
15
14 3Z
13
12
11
V CC
4A
4Y
NC
4Z
En
NC
3Y
3A
Gnd
1A
1Y
1Z
En
2Z
2Y
2A
12
1
2
3
4
5
6
7
8
P Package
MC75172BDW
MC75174BDW
MC75174BP
Motorola, Inc. 1996
QUAD EIA–485 LINE DRIVERS
Device
PLASTIC PACKAGE
DW SUFFIX
CASE 751D
ORDERING INFORMATION
16
15
14
13
12
11
10
(SO–20L)
MC75174B
9
MC75172B
MC75174B
V CC
4A
4Y
4Z
En
34
3Z
3Y
3A
Order this document by MC75172B/D
SEMICONDUCTOR
TECHNICAL DATA
Gnd
Temperature Range
NC
NC
1A
1Y
En
2Y
2A
T A = – 40 to +85 C
1Z
12
2Z
10
1
2
3
4
5
6
7
8
9
Operating
PLASTIC PACKAGE
DW Package
CASE 648
P SUFFIX
Plastic DIP
Package
SO–20L
SO–20L
20
19
18
17
16
15
14
13
12
11
V CC
4A
4Y
NC
4Z
En
34
3Z
NC
3Y
3A
Rev 1
1

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MC75174B Summary of contents

Page 1

... MC75174B SEMICONDUCTOR TECHNICAL DATA P SUFFIX PLASTIC PACKAGE CASE 648 DW SUFFIX PLASTIC PACKAGE CASE 751D (SO–20L) ORDERING INFORMATION Operating Temperature Range Device Package SO–20L – +85 C SO–20L Plastic DIP MC75174B ...

Page 2

... Leakage in 3–State Mode, –7 Short Circuit Current to Ground p p Short Circuit Current, –7 switched from 0.8 to 2.0 V. Typical values determined ambient and 5.0 V supply. 2 MC75172B MC75174B Symbol Value Unit V CC –0.5, +7.0 Vdc V in +7.0 Vdc I in – – ...

Page 3

... ELECTRICAL CHARACTERISTICS (–40 C Characteristics Inputs Low Level Voltage (Pins 4 & 12, MC75174B only) Low Level Voltage (All Other Pins) High Level Voltage (All Inputs) Current @ 2.7 V (All Inputs) Current @ 0.5 V (All Inputs) Clamp Voltage (All Inputs –18 mA) Thermal Shutdown Junction Temperature Power Supply Current (Outputs Open ...

Page 4

... SK1 = t PLHD – t PHLD for each driver SK2 computed by subtracting the shortest t PLHD from the longest t PLHD of the 4 drivers within a package SK3 computed by subtracting the shortest t PHLD from the longest t PHLD of the 4 drivers within a package. 4 MC75172B MC75174B Figure 2. Common Mode Test OD3 (0 ...

Page 5

... Figure 6. Enable Timing, Differential Outputs 3 3.0 V S.G. p NOTES: 1. S.G. set to: f 1.0 MHz; duty cycle = 50 inverted for Enable measurements. MOTOROLA ANALOG IC DEVICE DATA MC75172B MC75174B 1 PZH(E) V out 110 2 out 1 PZL(E) V out V out 2 ...

Page 6

... Figure 11. Output Differential Voltage versus Load Current 4.0 3 5 4.75 V 1 OUTPUT CURRENT (mA) 6 MC75172B MC75174B Figure 8. Single–Ended Output Voltage 2.0 1. 20.0 mA 1.5 1. 5.25 V 1.0 – 40 – Figure 10. Single–Ended Output Voltage versus Temperature 4 – ...

Page 7

... Driver Pins Inputs – 5.0 – 10 – – 20 – 25 – 0.5 0.5 1.5 2.5 3 INPUT VOLTAGE (V) MOTOROLA ANALOG IC DEVICE DATA MC75172B MC75174B Figure 14. Output Leakage Current 5.0 0 –5.0 –10 –15 –20 9.0 12 –40 – AMBIENT TEMPERATURE ( C) Figure 16. Short Circuit Current versus Common Mode Voltage ...

Page 8

... Description The MC75172B and MC75174B are differential line drivers designed to comply with EIA–485 Standard (April 1983) for use in balanced digital multipoint systems containing multiple drivers. The drivers also comply with EIA–422–A and CCITT Recommendations V.11 and X.27. The drivers meet the EIA– ...

Page 9

... The 60 mentioned above allows for two 120 terminating resistors. Using the EIA–485 requirements (worst case limits), and the graphs of Figures 7 and 9, it can be determined that the maximum current an MC75172B or MC75174B driver will [ source or sink is 65 mA. System Example An example of a typical EIA– ...

Page 10

... NOTES: 1. Terminating resistors R T must be located at the physical ends of the cable. 2. Stubs should be as short as possible. 3. Circuit ground of all drivers and receivers must be connected via a dedicated wire within the cable. Do not rely on chassis ground or power line ground. 10 MC75172B MC75174B Figure 18. Typical EIA–485 System R R TTL ...

Page 11

... Dynamic Input Impedance R in NOTES: 1. Compliance with V.11 and X.27 (Blue book) output impedance requires external resistors in series with the outputs of the MC75172B and MC75174B Bit time. Copies of the EIA Recommendations (EIA–485 and EIA–422–A) can be obtained from the Electronics Industries Association, Washington, D.C. (202– ...

Page 12

... USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454 MFAX: RMFAX0@email.sps.mot.com – TOUCHTONE 602–244–6609 INTERNET: http://Design–NET.com 12 MC75172B MC75174B OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE R ...

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