DS75176BM National Semiconductor, DS75176BM Datasheet

IC, RS422/RS485 TRANSCEIVER, 5V, NSOIC-8

DS75176BM

Manufacturer Part Number
DS75176BM
Description
IC, RS422/RS485 TRANSCEIVER, 5V, NSOIC-8
Manufacturer
National Semiconductor
Datasheet

Specifications of DS75176BM

Device Type
Transceiver
Ic Interface Type
RS422, RS485
No. Of Drivers
1
Supply Voltage Range
4.75V To 5.25V
Driver Case Style
SOIC
No. Of Pins
8
Operating Temperature Range
0°C To +70°C
Dc
0742
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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© 2004 National Semiconductor Corporation
DS75176B/DS75176BT
Multipoint RS-485/RS-422 Transceivers
General Description
The DS75176B is a high speed differential TRI-STATE
bus/line transceiver designed to meet the requirements of
EIA standard RS485 with extended common mode range
(+12V to −7V), for multipoint data transmission. In addition, it
is compatible with RS-422.
The driver and receiver outputs feature TRI-STATE capabil-
ity, for the driver outputs over the entire common mode
range of +12V to −7V. Bus contention or fault situations that
cause excessive power dissipation within the device are
handled by a thermal shutdown circuit, which forces the
driver outputs into the high impedance state.
DC specifications are guaranteed over the 0 to 70˚C tem-
perature and 4.75V to 5.25V supply voltage range.
Connection and Logic Diagram
TRI-STATE
®
is a registered trademark of National Semiconductor Corp.
Order Number DS75176BN, DS75176BTN, DS75176BM or DS75176BTM
DS008759
See NS Package Number N08E or M08A
Top View
®
Features
n Meets EIA standard RS485 for multipoint bus
n Small Outline (SO) Package option available for
n 22 ns driver propagation delays.
n Single +5V supply.
n −7V to +12V bus common mode range permits
n Thermal shutdown protection.
n High impedance to bus with driver in TRI-STATE or with
n Pin out compatible with DS3695/A and SN75176A/B.
n Combined impedance of a driver output and receiver
n 70 mV typical receiver hysteresis.
transmission and is compatible with RS-422.
minimum board space.
ground difference between devices on the bus.
power off, over the entire common mode range allows
the unused devices on the bus to be powered down.
input is less than one RS485 unit load, allowing up to 32
transceivers on the bus.
00875901
www.national.com
July 2004
±
7V

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DS75176BM Summary of contents

Page 1

... DC specifications are guaranteed over the 0 to 70˚C tem- perature and 4.75V to 5.25V supply voltage range. Connection and Logic Diagram Order Number DS75176BN, DS75176BTN, DS75176BM or DS75176BTM TRI-STATE ® registered trademark of National Semiconductor Corp. © 2004 National Semiconductor Corporation ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Control Input Voltages Driver Input Voltage Driver Output Voltages Receiver Input Voltages (DS75176B) Receiver Output Voltage @ Continuous Power Dissipation 25˚ ...

Page 3

Electrical Characteristics 0˚C ≤ T ≤ 70˚C, 4.75V < < V 5.25V unless otherwise specified A CC Symbol Parameter I Driver Short-Circuit OSD Output Current I Receiver Short-Circuit OSR Output Current Note 1: “Absolute Maximum Ratings” are those beyond which ...

Page 4

AC Test Circuits 00875902 FIGURE 1. Note: S1 and S2 of load circuit are closed except as otherwise mentioned. FIGURE 2. Switching Time Waveforms FIGURE 5. Driver Propagation Delays and Transition Times www.national.com Note: Unless otherwise specified the switches are ...

Page 5

Switching Time Waveforms Note: Differential input voltage may may be realized by grounding RI and pulsing RI between +2.5V and −2.5V FIGURE 8. Receiver Enable and Disable Times (Continued) FIGURE 6. Driver Enable and Disable Times FIGURE 7. Receiver Propagation ...

Page 6

Function Tables DS75176B Transmitting X — Don’t care condition Z — High impedance state Fault — Improper line conditons causing excessive power dissipation in the driver, such as shorts or bus contention situations **This is a fail safe condition Typical ...

Page 7

Physical Dimensions inches (millimeters) unless otherwise noted Lit. # 103669 Molded Dual-In-Line Package (N) Order Number DS75176BN or DS75176BTN NS Package Number N08E 7 www.national.com ...

Page 8

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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