Aeroflex Circuit Technology

SCD4810 REV B 8/12/98

Plainview NY (516) 694-6700

3

Note 1. Characteristics guaranteed by design, not production tested .

Note 2. Measured at 1MHz from bus side of transformer after contribution from transformer is accounted for.

Absolute Maximum Ratings

Operating case temperature

-55°C to +125°C

Storage case temperature

-65°C to +150 °C

Negative Power supply Voltage

-15 V P.S. to -18V MAX

Positive Power Supply Voltage

-0.3 V to +5.5 V

Receiver differential input

±10 V

Receiver input voltage (common mode)

±5 V

Driver peak output current

300 mA

Total package power dissipation over the full operating case

temperature rise

4 Watts

(Note. Normal operation conditions require one transmitter on and the

other off at any given time, with a maximum dissipation of 3.2 watts.

)

Maximum junction to case temperature rise for the hottest

device

6° C

Thermal resistance for the hottest device, junction to bottom of

case

3° C/W

Electrical Characteristics, Driver Section

Input Characteristics, TX DATA in or TX DATA in

Parameter

Condition

Symbol

Min

Typ

Max

Unit

"0" Input Current

-0.25

-0.4

mA

"1" Input Current

140

µA

"0" Input Voltage

0.7

V

"1" Input Voltage

2.0

V

Inhibit Characteristics

"0" Input Current

-0.25

-0.4

mA

"1" Input Current

1.0

40

µA

"0" Input Voltage

0.7

V

"1" Input Voltage

2V

Delay from TX inhibit,(0

¡1) to inhibited output

Note 1

240

350

nS

Delay from TX inhibit, (1

¡0) to active output

Note 1

210

350

nS

Differential output noise, inhibit mode

210

mV p-p

Differential output impedance (inhibited)

Note 2

7K

Ω

Output Characteristics

Differential output level

Ω

6

6.8

7.7

V p-p

Rise and fall times

(10% to 90% of p-p output)

200

240

300

nS

Output offset at point A-A’ on Fig 5., 2.5 µS after

midpoint crossing of the parity bit of the last word

of a 660µS message

Ω

±90

mV peak

Delay from 50% point of TX DATA or TX DATA

input to zero crossing of differential signal

Note 1

260

350

nS