SP491EN-L/TR Просмотр технического описания (PDF) - Exar Corporation

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SP491EN-L/TR

Full Duplex RS-485 Transceivers

Exar Corporation 

TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.

PARAMETERS

MIN.

SP490 RECEIVER

TYP.

ELECTRICAL CHARACTERISTICS

MAX. UNITS CONDITIONS

AC Characteristics

Maximum Data Rate

5 Mbps

Receiver Input to Output

45 150 ns

Receiver Input to Output

45 150 ns

Diff. Receiver Skew ItPLH-tPHLI 13 ns

tPLH; RDIFF = 54Ω,

CL1 = CL2 = 100pF; Figures 3 & 8

tPHL; RDIFF = 54Ω,

CL1 = CL2 = 100pF; Figures 3 & 8

RDIFF = 54Ω; CL1 = CL2 = 100pF;

Figures 3 & 8

POWER REQUIREMENTS

Supply Voltage

+4.75

+5.25 Volts

Supply Current

900 µA

ENVIRONMENTAL AND

MECHANICAL

Operating Temperature

Commercial (C_)

Industrial (E_)

Storage Temperature

Package

Plastic DIP (_S)

NSOIC (_N)

0

-40

-65

+70 °C

+85 °C

+150 °C

Figure 1. Driver DC Test Load Circuit

Figure 2. Receiver Timing Test Load Circuit

Figure 3. Driver/Receiver Timing Test Circuit

Figure 4. Driver Timing Test Load #2 Circuit

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com



SP490,491_101_062711

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