SNLS072C – MAY 1998 – REVISED APRIL 2013
Multipoint RS485/RS422 Transceivers/Repeaters
Check for Samples:
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FEATURES
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Meets EIA standard RS485 for Multipoint Bus
Transmission and is Compatible with RS-422
15 ns Driver Propagation Delays with 2 ns
Skew (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
DESCRIPTION
The DS3695, DS3696, and DS3697 are high speed
differential
TRI-STATE
bus/line
transceivers/repeaters designed to meet the
requirements of EIA standard RS485 with extended
common mode range (+12V to
−7V),
for multipoint
data transmission.
The driver and receiver outputs feature TRI-STATE
capability. The driver outputs remain in TRI-STATE
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 DS3696 provides an output pin
TS (thermal shutdown) which reports the occurrence
of the thermal shutdown of the device. This is an
“open collector” pin with an internal 10 kΩ pull-up
resistor. This allows the line fault outputs of several
devices to be wire OR-ed.
Both AC and DC specifications are specified 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. PDIP (Top View)
See Package Number P (R-PDIP-T8)
Figure 2. PDIP (Top View)
See Package Number P (R-PDIP-T8)
Figure 3. PDIP (Top View)
See Package Number P (R-PDIP-T8)
TS pin was LF (Line Fault) in previous data sheets and reports the occurrence of a thermal shutdown of the device.
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PRODUCTION DATA information is current as of publication date.
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