SP3483 DS/04

SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers

© Copyright 2000 Sipex Corporation

2

T

PARAMETERS

MIN.

TYP.

MAX.

UNITS

CONDITIONS

DRIVER

DC Characteristics

Differential Output Voltage

GND

V

CC

Volts

Unloaded; R =

∞; Figure 1

Differential Output Voltage

2

V

CC

Volts

with load; R = 50

Ω; (RS-422); Figure 1

Differential Output Voltage

1.5

V

CC

Volts

with load; R = 27

Ω; (RS-485); Figure 1

Change in Magnitude of Driver

Differential Output Voltage for

Complimentary States

0.2

Volts

R = 27

Ω or R = 50Ω; Figure 1

Driver Common-Mode

Output Voltage

3

Volts

R = 27

Ω or R = 50Ω; 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

±10

µA

Applies to DE, DI, RE

Driver Short-Circuit Current

V

±250

mA

-7V

≤ V

V

±250

mA

-7V

≤ V

DRIVER

AC Characteristics

Maximum Data Rate

250

kbps

RE = V

Driver Input to Output, t

PLH

400

900

1500

ns

Figures 2 and 8

Driver Input to Output, t

PHL

400

900

1500

ns

Figures 2 and 8

Differential Driver Skew

10

ns

t

Driver Rise or Fall Time

700

1000

ns

From 10% to 90%

Figures 3 and

9

Driver Enable to Output High

700

1300

ns

Figures 4 and 10

Driver Enable to Output Low

690

1300

ns

Figures 5 and 10

Driver Disable Time from Low

80

120

ns

Figures 5 and 10

Driver Disable Time from High

90

120

ns

Figures 4 and 10

RECEIVER

DC Characteristics

Differential Input Threshold

-0.2

+0.2

Volts

-7V

≤ V

Input Hysteresis

20

mV

V

Output Voltage High

V

Volts

V

Output Voltage Low

0.4

Volts

V

Three-State (High Impedance)

Output Current

+1

µA

0V

≤ 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

60

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 per package

8-pin NSOIC (derate 6.14mW/˚C above +70˚C).........................500mW

8-pin PDIP (derate 11.8mW/˚C above +70˚C)..........................1000mW

SPECIFICATIONS