DS36C279M National Semiconductor, DS36C279M Datasheet - Page 8

• Manufacturer Part Number: DS36C279M
• Description: IC, RS-485 TRANSCEIVER, 5.25V, SOIC-8
• Manufacturer: National Semiconductor

Specifications of DS36C279M

• Device Type: Transceiver
• Ic Interface Type: RS485
• No. Of Drivers: 1
• Supply Voltage Range: 4.75V To 5.25V
• Driver Case Style: SOIC
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Parameter Measurement Information
Typical Application Information
Pin No.
1
2
3
4
5
6
7
8
DO*/RI*
Name
DO/RI
GND
RE*
V
RO
DE
DI
CC
Receiver Output: When RE (Receiver Enable) is LOW, the receiver is enabled (ON), if DO/RI ≥
DO*/RI* by 200 mV, RO will be HIGH. If DO/RI ≤ DO*/RI* by 200 mV, RO will be LOW. Additionally
RO will be HIGH for OPEN (Non-terminated) Inputs.
Receiver Output Enable: When RE* is LOW the receiver output is enabled. When RE* is HIGH, the
receiver output is in TRI-STATE (OFF). When RE* is HIGH and DE is LOW, the device will enter a
low-current sleep mode after 600 ns.
Driver Output Enable: When DE is HIGH, the driver outputs are enabled. When DE is LOW, the
driver outputs are in TRI-STATE (OFF). When RE* is HIGH and DE is LOW, the device will enter a
low-current sleep mode after 600 ns.
Driver Input: When DE (Driver Enable) is HIGH, the driver is enabled, if DI is LOW, then DO/RI will
be LOW and DO*/RI* will be HIGH. If DI is HIGH, then DO/RI is HIGH and DO*/RI* is LOW.
Ground Connection.
Driver Output/Receiver Input, 485 Bus Pin.
Driver Output/Receiver Input, 485 Bus Pin.
Positive Power Supply Connection: Recommended operating range for V
FIGURE 17. Entering Sleep Mode Conditions
FIGURE 18. Typical RS-485 Bus Interface
TABLE 1. Device Pin Descriptions
8
(Continued)
Description
CC
is +4.75V to +5.25V.
01205319
01205318