SNLS353C – FEBRUARY 1996 – REVISED APRIL 2013
DS3695A/DS3695AT/DS3696A Multipoint RS485/RS422 Transceivers
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FEATURES
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Meets EIA Standard RS485 for Multipoint Bus
Transmission and is Compatible with RS-422
10 Ns Driver Propagation Delays (Typical)
Single +5V Supply
−7V
to +12V Bus Common Mode Range
Permits ±7V Ground Difference between
Devices on the Bus
Thermal Shutdown Protection
High Impedance to Bus with Driver in TRI-
STATE or with Power Off, over the Entire
Common Mode Range Allows the Unused
Devices on the Bus to be Powered Down
Combined Impedance of a Driver Output and
Receiver Input is less than One RS485 Unit
Load, Allowing up to 32 Transceivers on the
Bus
70 mV Typical Receiver Hysteresis
Available in SOIC Packaging
DESCRIPTION
The DS3695A and DS3696A are high speed
differential TRI-STATE bus/line transceivers designed
to meet the requirements of EIA standard RS485 with
extended common mode range (+12V to
−7V),
for
multipoint data transmission. In addition they are
compatible with requirements of RS-422.
The driver and receiver outputs feature TRI-STATE
capability. The driver outputs remain in over the
entire common mode range of +12V to
−7V.
Bus
faults that cause excessive power dissipation within
the device trigger a thermal shutdown circuit, which
forces the driver outputs into the high impedance
state. The DS3696A provides an output pin (TS)
which reports the thermal shutdown of the device. TS
is an “open collector” pin with an internal 10 kΩ pull-
up resistor. This allows the TS outputs of several
devices to be wire OR-ed.
Both AC and DC specifications are guaranteed over
the 0°C to 70°C temperature and 4.75V to 5.25V
supply voltage range.
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Connection and Logic Diagrams
Figure 1. Molded Package, Small Outline (D0008A)
Top View
Figure 2. Top View
(See Package Number D0008A)
TS was LF (Line Fault) on previous datasheets, TS goes low upon thermal shutdown.
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Copyright © 1996–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
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