Datasheet

DS36C279
www.ti.com SNLS098B –JULY 2000–REVISED APRIL 2013
DS36C279 Low Power EIA-RS-485 Transceiver with Sleep Mode
Check for Samples: DS36C279
1
FEATURES
DESCRIPTION
The DS36C279 is a low power differential bus/line
• 100% RS-485 Compliant
transceiver designed to meet the requirements of RS-
– Specified 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.
• Automatic Sensing Sleep Mode
The sleep mode feature automatically puts the device
– Reduces I
CC
to 10 μA Maximum
in a power saving mode when both the driver and
receiver are disabled.
(2)
The device is ideal for use in
• Built-in Power Up/Down Glitch-Free Circuitry
power conscious applications where the device may
– Permits Live Transceiver
be disabled for extended periods of time.
Intersection/Displacement
The driver and receiver outputs feature TRI-STATE
• SOIC Packages
capability. The driver outputs operate over the entire
• Industrial Temperature Range: −40°C to
common mode range of −7V to +12V. Bus contention
+85°C
or fault situations that cause excessive power
dissipation within the device are handled by a thermal
• On-Board Thermal Shutdown Circuitry
shutdown circuit, which forces the driver outputs into
– Prevents Damage to the Device in the Event
a high impedance state.
of Excessive Power Dissipation
The receiver incorporates a fail safe circuit which
• Wide Common Mode Range: −7V to +12V
ensures a high output state when the inputs are left
• Receive Open Input Fail-Safe
(1)
open.
(3)
• ¼ Unit Load (DS36C279): ≥ 128 Nodes
The DS36C279T is fully specified over the industrial
• ½ Unit Load (DS36C279T): ≥ 64 Nodes
temperature range (−40°C to +85°C).
• ESD (Human Body Model): ≥ 2 kV
• Drop-In Replacement for:
(2) Device enters sleep mode if enable conditions are held > 600
– LTC485 MAX485 DS75176 DS3695
ns
(1) Non-terminated, open input only (3) Non-terminated, open input only
Connection and Logic Diagram
Figure 1. See Package Number D
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Products conform to specifications per the terms of the Texas
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