Date: 03-04-05

Programmable Dual RS-232/RS-485 Transceiver

© Copyright 2005 Sipex Corporation

3

ELECTRICAL CHARACTERISTICS

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

MIN.

TYP.

MAX.

UNITS

CONDITIONS

RS-485 DRIVER

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 +10V

AC Characteristics

Maximum Data Rate

10

Mbps

R

Output Transition Time

30

50

ns

Rise/fall time, 10%–90%

Propagation Delay

See Figures 2 & 4

t

PHL

80

120

ns

R

t

PLH

80

120

ns

R

Driver Output Skew

10

20

ns

per Figure 4, t

RS-485 RECEIVER

DC Characteristics

Inputs

Common Mode Range

–7.0

+12.0

Volts

Receiver Sensitivity

±0.2

±0.3

Volts

–7V ≤ V

Input Impedance

12

15

kΩ

–7V ≤ V

AC Characteristics

Maximum Data Rate

10

Mbps

Propagation Delay

See Figures 2 & 6

t

PHL

130

200

ns

R

t

PLH

130

200

ns

R

Differential Receiver Skew

10

20

ns

t

C

ENABLE TIMING

RS-485 Driver

Enable Time

See Figures 3 & 5

Enable to Low

90

150

ns

C

Enable to High

90

150

ns

C

Disable Time

See Figures 3 & 5

Disable From Low

80

120

ns

C

Disable From High

80

120

ns

C

POWER REQUIREMENTS

Supply Voltage V

CC

+4.75

+5.25

Volts

Supply Current I

CC

No Load (T

10

15

mA

SEL_A

➨ SEL_D = "0001"

No Load (RS-232 Mode)

15

30

mA

SEL_A

➨ SEL_D = "0000"

No Load (RS-485 Mode)

7

20

mA

SEL_A

➨ SEL_D = "1100"

ENVIRONMENTAL

Operating Temperature

Commercial (..C..)

0

+70

°C

Industrial (..E..)

–40

+85

°C

Storage Temperature

–65

+150

°C