DS36C278_14 Datasheet, PDF (1/16 Pages) Texas Instruments – DS36C278 Low Power Multipoint EIA-RS-485 Transceiver

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