SP495 datasheet(2/6 Pages) SIPEX

2 / 6 page

SP495

Quad Differential RS-485 Transceiver

SPECIFICATIONS

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

PARAMETERS

MIN.

TYP.

MAX.

UNITS

CONDITIONS

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 DRx, DEx/ REx

Input Low Voltage

0.8

Volts

Applies to DRx, DEx/ REx

Input Current

±10

µA

Applies to DRx, DEx/ REx

Driver Short-Circuit Current

OUT = HIGH

±250 mA

-7V

≤ V

O ≤ 10V

OUT = LOW

±250 mA

-7V

≤ V

O ≤ 10V

DRIVER

AC Characteristics

Maximum Driver Data Rate

Mbps

DIFF = 54Ω, CL1 = CL2 = 100pF

Driver Input to Output

PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see Figures 3 and 6

Driver Input to Output

PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see Figures 3 and 6

Driver Skew

see Figures 3 and 6

Driver Rise or Fall Time

From 10% to 90%; R

DIFF = 54Ω,

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

Driver Enable to Output HIGH

L1 = CL2 = 100pF; see Figures

4 and 7; S

2 closed

Driver Enable to Output LOW

L1 = CL2 = 100pF; see Figures

4 and 7; S

1 closed

Driver Disable Time from LOW

L1 = CL2 = 15pF; see Figures

4 and 7; S

1 closed

Driver Disable Time from HIGH

L1 = CL2 = 15pF; see Figures

4 and 7; S

2 closed

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

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

CC+0.5V)

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

CC+0.5V)

Receivers....................................................................15V

Output Voltages

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

CC+0.5V)

Drivers...........................................................-8V to 12.5V

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

CC+0.5V)

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

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

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