2

TGoddard/SP332/9617R0

SP332 RS-232/RS-485 Multi-Mode Serial Transceiver

© Copyright 2000 Sipex Corporation

SPECIFICATIONS

T

PARAMETER

MIN.

TYP.

MAX.

UNITS

CONDITIONS

RS-485 DRIVER

DC Characteristics

Differential Output Voltage

GND

V

CC

Volts

Unloaded; R=

∞; see figure 1

Differential Output Voltage

2.0

5.0

Volts

With Load; R=50

Ω (RS-422);

see figure 1

Differential Output Voltage

1.5

5.0

Volts

With Load; R=27

Ω (RS-485);

see figure 1

Change in Magnitude of Driver

Differential Output Voltage for

Complementary 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 transmitter inputs,

SEL A, SEL B, SD, LB

Input Low Voltage

0.8

Volts

Applies to

SEL A, SEL B, SD, LB

Input Current

±10

µA

Applies to:

Pull-Up Current

1.5

µA

transmitter inputs, LB

Pull-Down Current

3.0

µA

SEL A, SEL B, SD,

Driver Short-Circuit

Current

V

35

250

mA

-7V

≤V

V

35

250

mA

-7V

≤V

AC Characteristics

Driver Data Rate

10

Mbps

Driver Input to Output

70

180

ns

R

t

PLH

see figures 3 and 6

Driver Input to Output

70

180

ns

R

t

PHL

see figures 3 and 6

Driver Skew

5

10

ns

From output to output;

see figures 3 and 6

Driver Rise or Fall Time

3

15

40

ns

From 10% to 90%; R

C

RS-485 RECEIVER

DC Characteristics

Differential Input Threshold

-0.2

+0.2

Volts

-7V

≤V

Input Hysteresis

70

mV

V

Output Voltage High

3.5

Volts

I

Output Voltage Low

0.4

Volts

I

Input Resistance

12

15

k

Ω

-7V

≤V

Input Current (A, B); V

+1.5

mA

V

receiver input. B is the inverting

receiver input

Input Current (A, B); V

-0.8

mA

V

Short Circuit Current

85

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........................................................-0.5V to (V

Drivers..................................................-0.5V to (V

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

±30V@≤100mA

Driver Outputs......................................................................................

±15V

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

Power Dissipation..........................................................................1000mW