Datasheet

DS36C278
www.ti.com SNLS096C –JULY 1998–REVISED APRIL 2013
DS36C278 Low Power Multipoint EIA-RS-485 Transceiver
Check for Samples: DS36C278
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FEATURES
DESCRIPTION
The DS36C278 is a low power differential bus/line
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• 100% RS-485 Compliant
transceiver designed to meet the requirements of RS-
– Guaranteed RS-485 Device Interoperation
485 standard for multipoint data transmission. In
• Low Power CMOS Design: I
CC
500 μA Max
addition it is compatible with TIA/EIA-422-B.
• Built-In Power Up/Down Glitch-Free Circuitry
The CMOS design offers significant power savings
– Permits Live Transceiver
over its bipolar and ALS counterparts without
sacrificing ruggedness against ESD damage. The
Insertion/Displacement
device is ideal for use in battery powered or power
• PDIP and SOIC Packages Available
conscious applications. I
CC
is specified at 500 μA
• Industrial Temperature Range: −40°C to
maximum.
+85°C
The driver and receiver outputs feature TRI-STATE
• On-Board Thermal Shutdown Circuitry
capability. The driver outputs operate over the entire
– Prevents Damage to the Device in the Event
common mode range of −7V to +12V. Bus contention
of Excessive Power Dissipation
or fault situations that cause excessive power
dissipation within the device are handled by a thermal
• Wide Common Mode Range: −7V to +12V
shutdown circuit, which forces the driver outputs into
• Receiver Open Input Fail-Safe
(1)
the high impedance state.
• ¼ Unit Load (DS36C278): ≥12 Nodes
The receiver incorporates a fail safe circuit which
• ½ Unit Load (DS36C278T): ≥64 Nodes
guarantees a high output state when the inputs are
• ESD (Human Body Model): ≥2 kV
left open.
(1)
• Drop in Replacement for:
The DS36C278T is fully specified over the industrial
– LTC485, MAX485, DS75176, DS3695
temperature range (−40°C to +85°C).
(1) Non-terminated, open input only
Connection Diagram
Figure 1. 8-Pin PDIP or SOIC
Package Numbers D0008A and P0008E
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PRODUCTION DATA information is current as of publication date.
Copyright © 1998–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.