Date: 6/21/04

SP485R RS-485 Serial Transceiver

© Copyright 2004 Sipex Corporation

2

Typically 25°C @ Vcc = +5V unless otherwise noted.

MIN.

TYP.

MAX.

UNITS

CONDITIONS

LOGIC INPUTS

V

IL

0.8

Volts

V

IH

2.0

Volts

LOGIC OUTPUTS

V

OL

0.4

Volts

I

V

OH

2.4

Volts

I

RS-485 DRIVER

DC Characteristics

TTL Input Levels

V

IL

0.8

Volts

V

IH

2.0

Volts

Outputs

Open Circuit Voltage

6.0

Volts

Differential Output

1.5

5.0

Volts

R

Balance

±0.2

Volts

|V

Common-Mode Output

3.0

Volts

Output Current

28.0

mA

R

Short Circuit Current

±250

mA

Terminated in –7V to +12V

AC Characteristics

Maximum Data Rate

5

Mbps

R

Output Transition Time

30

ns

Rise/fall time, 10%–90%

Propagation Delay

See Figures 3 and 5

t

PHL

60

100

ns

R

t

PLH

60

100

ns

R

Driver Output Skew

5

15

ns

see Figure 3 and 5,

t

RS-485 RECEIVER

DC Characteristics

TTL Output Levels

V

OL

0.4

Volts

V

OH

2.4

Volts

Tri-State Output Current

±1

µA

0.4V≤V

Inputs

Common Mode Range

–7.0

+12.0

Volts

Receiver Sensitivity

±0.2

Volts

–7V ≤ V

Input Impedance

120

150

kΩ

–7V ≤ V

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation

of the device at these ratings or any other above those

indicated in the operation sections of the specifications

below is not implied. Exposure to absolute maximum

rating conditions for extended periods of time may

affect reliability.

V

Storage Temperature..........................-65˚C to +150˚C

Power Dissipation

8-pin Plastic DIP...........................1000mW

8-pin Plastic N-SOIC.......................1000mW

Package Derating:

8-pin Plastic DIP

ø

8-pin Plastic N-SOIC

ø

ELECTRICAL CHARACTERISTICS