SP483E datasheet(2/11 Pages) SIPEX

2 / 11 page

SP483EDS/05

SP483E Low EMI Half-Duplex RS485 Transceiver

SPECIFICATIONS

MIN to TMAX and VCC = 5V ± 5% unless otherwise noted.

PARAMETERS

MIN.

TYP.

MAX.

UNITS

CONDITIONS

SP483E DRIVER

DC Characteristics

Differential Output Voltage

GND

Volts

Unloaded; R =

∞ ; see Figure 1

Differential Output Voltage

Volts

with load; R = 50

Ω; (RS-422);

see Figure 1

Differential Output Voltage

1.5

Volts

with load; R = 27

Ω; (RS-485); see Figure 1

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

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

µA

Control Lines

µA

DE, RE

Driver Short-Circuit Current

OUT = HIGH

±250 mA

-7V

≤ V

O ≤ +12V

OUT = LOW

±250 mA

-7V

≤ V

O ≤ +12V

SP483E DRIVER

AC Characteristics

Maximum Data Rate

250

Kbps

RE = 5V, DE = 5V; R

DIFF = 54Ω,

L1 = CL2 = 100pF

Driver Input to Output

250

800

2000

PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see Figures 3 and 5

Driver Input to Output

250

800

2000

PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see Figures 3 and 5

Driver Skew

100

800

see Figures 3 and 5,

SKEW = | tDPLH - tDPHL |

Driver Rise or Fall Time

250

2000

From 10% to 90%; R

DIFF = 54Ω,

L1 = CL2 = 100pF; see Figures 3 and 6

Driver Enable to Output High

250

2000

L = 100pF; see Figures 4 & 6; S2 closed

Driver Enable to Output Low

250

2000

L = 100pF; see Figures 4 & 6; S1 closed

Driver Disable Time from Low

300

3000

L = 15pF; see Figures 2 & 8; S1 closed

Driver Disable Time from High

300

3000

L = 15pF; see Figures 2 & 8; S2 closed

SP481E/SP485E RECEIVER

DC Characteristics

Differential Input Threshold

-0.2

+0.2

Volts

-7V

≤ V

CM ≤ +12V

Input Hysteresis

CM = 0V

Output Voltage High

3.5

Volts

O = -4mA, VID = +200mV

Output Voltage Low

0.4

Volts

O = +4mA, VID = -200mV

Three-State (High Impedance)

Output Current

±1

µA

0.4V

≤ V

O ≤ 2.4V; RE = 5V

Input Resistance

Ω

-7V

≤ V

CM ≤ +12V

Input Current (A, B); V

IN = 12V

+1.0

DE = 0V, V

CC = 0V or 5.25V, VIN = 12V

Input Current (A, B); V

IN = -7V

-0.8

DE = 0V, V

CC = 0V or 5.25V, VIN = -7V

Short-Circuit Current

≤ V

CM ≤ VCC

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.

CC............................................................................................................+7V

Input Voltages

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

CC+0.5V)

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

CC+0.5V)

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

±15V

Output Voltages

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

CC+0.5V)

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

±15V

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

CC+0.5V)

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

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

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