SP483EDS/05

SP483E Low EMI Half-Duplex RS485 Transceiver

© Copyright 2000 Sipex Corporation

2

SPECIFICATIONS

T

PARAMETERS

MIN.

TYP.

MAX.

UNITS

CONDITIONS

SP483E DRIVER

DC Characteristics

Differential Output Voltage

GND

V

CC

Volts

Unloaded; R =

∞ ; see Figure 1

Differential Output Voltage

2

V

CC

Volts

with load; R = 50

Ω; (RS-422);

see Figure 1

Differential Output Voltage

1.5

V

CC

Volts

with load; R = 27

Change in Magnitude of Driver

Differential Output Voltage for

Complimentary States

0.2

Volts

R = 27

Ω or R = 50Ω; see Figure 1

Driver Common-Mode

Output Voltage

3

Volts

R = 27

Ω or R = 50Ω; see Figure 1

Input High Voltage

2.0

Volts

Applies to DE, DI, RE

Input Low Voltage

0.8

Volts

Applies to DE, DI, RE

Input Current

Applies to DE, DI, RE

Driver Input

10

µA

DI

Control Lines

1

µA

DE, RE

Driver Short-Circuit Current

V

±250 mA

-7V

≤ V

V

±250 mA

-7V

≤ V

SP483E DRIVER

AC Characteristics

Maximum Data Rate

250

Kbps

RE = 5V, DE = 5V; R

C

Driver Input to Output

250

800

2000

ns

t

see Figures 3 and 5

Driver Input to Output

250

800

2000

ns

t

see Figures 3 and 5

Driver Skew

100

800

ns

see Figures 3 and 5,

t

Driver Rise or Fall Time

250

2000

ns

From 10% to 90%; R

C

Driver Enable to Output High

250

2000

ns

C

Driver Enable to Output Low

250

2000

ns

C

Driver Disable Time from Low

300

3000

ns

C

Driver Disable Time from High

300

3000

ns

C

SP481E/SP485E RECEIVER

DC Characteristics

Differential Input Threshold

-0.2

+0.2

Volts

-7V

≤ V

Input Hysteresis

20

mV

V

Output Voltage High

3.5

Volts

I

Output Voltage Low

0.4

Volts

I

Three-State (High Impedance)

Output Current

±1

µA

0.4V

≤ V

Input Resistance

12

15

k

Ω

-7V

≤ V

Input Current (A, B); V

+1.0

mA

DE = 0V, V

Input Current (A, B); V

-0.8

mA

DE = 0V, V

Short-Circuit Current

7

95

mA

0V

≤ 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

Input Voltages

Logic........................................................-0.3V to (V

Drivers..................................................-0.3V to (V

Receivers.................................................................

±15V

Output Voltages

Logic........................................................-0.3V to (V

Drivers......................................................................

±15V

Receivers............................................-0.3V to (V

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

Power Dissipation...........................................................................500mW