DS36C279_14 Datasheet, PDF (1/18 Pages) Texas Instruments – DS36C279 Low Power EIA-RS-485 Transceiver with Sleep Mode

DS36C279
www.ti.com
SNLS098B – JULY 2000 – REVISED APRIL 2013
DS36C279 Low Power EIA-RS-485 Transceiver with Sleep Mode
Check for Samples: DS36C279
FEATURES
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• 100% RS-485 Compliant
– Specified RS-485 Device Interoperation
• Low Power CMOS Design: I_CC 500 μA Max
• Automatic Sensing Sleep Mode
– Reduces I_CC to 10 μA Maximum
• Built-in Power Up/Down Glitch-Free Circuitry
– Permits Live Transceiver
Intersection/Displacement
• SOIC Packages
• 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
• Receive Open Input Fail-Safe⁽¹⁾
• ¼ Unit Load (DS36C279): ≥ 128 Nodes
• ½ Unit Load (DS36C279T): ≥ 64 Nodes
• ESD (Human Body Model): ≥ 2 kV
• Drop-In Replacement for:
– LTC485 MAX485 DS75176 DS3695
(1) Non-terminated, open input only
DESCRIPTION
The DS36C279 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 sleep mode feature automatically puts the device
in a power saving mode when both the driver and
receiver are disabled.⁽²⁾ The device is ideal for use in
power conscious applications where the device may
be disabled for extended periods of time.
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
a high impedance state.
The receiver incorporates a fail safe circuit which
ensures a high output state when the inputs are left
open. ⁽³⁾
The DS36C279T is fully specified over the industrial
temperature range (−40°C to +85°C).
(2) Device enters sleep mode if enable conditions are held > 600
ns
(3) Non-terminated, open input only
Connection and Logic Diagram
Figure 1. See Package Number D
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