2

10/16/02

SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers

© Copyright 2002 Sipex Corporation

SPECIFICATIONS

T

PARAMETERS

MIN.

TYP.

MAX.

UNITS

CONDITIONS

SP3493 DRIVER

DC Characteristics

Differential Output Voltage

GND

V

CC

Volts

Unloaded; R = ∞ Ω; Figure 1

Differential Output Voltage

2

V

CC

Volts

With Load; R = 50Ω; (RS-422);

Figure 1

Differential Output Voltage

1.5

V

CC

Volts

With Load;R = 27Ω; (RS-485); Figure 1

Change in Magnitude of Driver

Differential Output Voltage for

Complimentary States

0.2

Volts

R = 27Ω or R = 50Ω; Figure 1

Driver Common-Mode

Output Voltage

3

Volts

R = 27Ω or R = 50Ω; Figure 1

Input High Voltage

2.0

Volts

Input Low Voltage

0.8

Volts

Input Current

+10

µA

Driver Short-Circuit Current

V

+250

mA

-7V < V

V

+250

mA

-7V < V

SP3493 DRIVER

AC Characteristics

Maximum Data Rate

250

kbps

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

Figures 2 and 8

Figures 2 and 8

Driver Rise or Fall Time

10

30

ns

From 10% to 90%;

Figures 3 and 9

SP3493 RECEIVER

DC Characteristics

Differential Input Threshold

0.2

+0.2

Volts

-7V < V

Input Hysteresis

25

mV

V

Output Voltage High

V

Volts

I

Output Voltage Low

0.4

Volts

I

Input Resistance

12

15

kΩ

-7V < V

Input Current (A, B); V

1.0

mA

V

Input Current (A, B); V

-0.8

mA

V

Short-Circuit Current

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

Drivers ........................................................................ -0.3V to +6.0V

Receivers ................................................................................... ±14V

Output Voltages

Drivers ....................................................................................... ±14V

Receivers .................................................................... -0.3V to +6.0V

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

Power Dissipation per Package