DS36C280M National Semiconductor, DS36C280M Datasheet - Page 6

• Manufacturer Part Number: DS36C280M
• Description: Slew Rate Controlled CMOS EIA-RS-485 Transceiver
• Manufacturer: National Semiconductor

www.national.com
Pin
Parameter Measurement Information
Typical Application Information
#
1
2
3
4
RO
SR
DE/RE*
DI
Name
Receiver Output: When DE/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
will be HIGH for OPEN (Non-terminated) inputs.
Slew Rate Control: A resistor connected to Ground controls the Driver Output rising and falling edge
rates.
Combined Driver and Receiver Output Enable: When signal is LOW the receiver output is enabled and
the driver outputs are in TRI-STATE (OFF). When signaI is HlGH, the receiver output is in TRI-STATE
(OFF) and the driver outputs are enabled.
Driver Input: When DE/RE* is HlGH, 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.
FIGURE 16. Receiver Enable and Disable Waveforms (t
FIGURE 15. Receiver Enable and Disable Waveforms (t
FIGURE 17. Typical Pin Connection
TABLE 1. Device Pin Descriptions
6
(Continued)
Description
DO*/RI* by 200 mV, RO will be LOW. Additionally RO
PHZ
PLZ
DS012052-17
, t
, t
PZL
PZH
DS012052-16
DS012052-15
)
)