Aeroflex Circuit Technology

SCD4487D REV B 3/10/98 Plainview NY (516) 694-6700

4

Electrical Characteristics — Receiver Section

Parameter

Condition

Symbol

Min

Typ

Max

Unit

Differential Receiver Input Voltage Range

(See Figure 5, Point B)

TXFMR

1.4:1

40

Common Mode Rejection Ratio (Note 3)

CMRR

45

dB

"1" State – Rx Data or Rx Data Output

2.5

3.7

V

"0" State – Rx Data or Rx Data Output

0.35

0.5

V

Delay (average) from Differential Input Zero

Crossings to RX DATA and RX DATA Output

50% points

270

400

nS

Input Threshold Voltage (referred to the bus)

100KHz–1MHz

0.60

0.75

1.20

Strobe Characteristics (Logic "0" Inhibits Output)

"0" Input Current

-0.1

-0.2

mA

"1" Input Current

1

+40

µA

"0" Input Voltage

0.7

V

"1" Input Voltage

2.0

V

Strobe Delay (Turn-on or Turn-off)

50

100

nS

Power Data

Power Supply Currents – Per Channel – See Figure 4

Transmitter Standby

0

12

18

1

16

30

mA

25% duty cycle

45

12

18

50

20

30

50% duty cycle

90

12

18

100

20

30

100% duty cycle

180

12

18

200

20

30

Power Supply Voltages

±15V Operating Power Supply Voltage Range

+14.25

-14.25

+15.00

-15.00

+15.75

-15.75

V

+5V Operating Power Supply Voltage Range)

+4.50

+5.00

+5.50

V

Note 1. Power on or off, measured from 75KHz to 1MHz at point A and transformer self impedance of 3K

Ω minimum

at 1MHz.

Note 2: Power Supplies: ±15 Volts ±0.75 V & +5 Volts ±0.5 V, bypassed by 10 µF (Tantalum recommended)

Capacitor minimum. All measurements & specifications apply over the temperature range of -55°C to +125°C

(case temperature) unless otherwise specified.

Note 3: When measured as shown per Figure 5 with ± 10 Volt peak, line to ground, DC to 2MHz

Note 4: Typical power is measured with V