DS485_15 Datasheet, PDF (7/16 Pages) Texas Instruments – Low Power RS-485/RS-422 Multipoint Transceiver

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DS485
SNLS122C – JULY 1998 – REVISED APRIL 2013
Figure 14.
Pin #
1
2
3
4
5
6
7
8
PIN DESCRIPTIONS
I/O Name
Function
O RO Receiver Output: If A > B by 200 mV, RO will be high; If A < B by 200 mV, RO will be low. RO will be high also if
the inputs (A and B) are open (non-terminated).
I RE* Receiver Output Enable: RO is enabled when RE* is low; RO is in TRI-STATE when RE* is high.
I DE Driver Output Enable: The driver outputs (A and B) are enabled when DE is high; they are in TRI-STATE when DE
is low. Pins A and B also function as the receiver input pins (see below).
I DI Driver Input: A low on DI forces A low and B high while a high on DI forces A high and B low when the driver is
enabled.
NA GND Ground
I/O A Non-inverting Driver Output and Receiver Input pin. Driver output levels conform to RS-485 signaling levels.
I/O B Inverting Driver Output and Receiver Input pin. Driver output levels conform to RS-485 signaling levels.
NA V_CC Power Supply: 4.75V ≤ V_CC ≤ 5.25V
Related TI Low Power RS-485 Transceivers
Part Number
DS36C278
DS36C278T
DS36C279
DS36C279T
DS36C280
DS36C280T
Temperature Range
0°C to +70°C
−40°C to +85°C
0°C to +70°C
−40°C to +85°C
0°C to +70°C
−40°C to +85°C
Number of XCVRs on Bus
Comments
128
Ultra Low Power Transceiver
64
Ultra Low Power Transceiver
128
Auto-Sleep Mode
64
Auto-Sleep Mode
128
Adjustable Slew Rate Control
64
Adjustable Slew Rate Control
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