ISL3178AE Datasheet, PDF (10/14 Pages) Intersil Corporation – ±15kV ESD Protected, 3.3V, Full Fail-Safe, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers

ISL3178AE
thus the power dissipation, whenever the contending voltage
exceeds either supply.
Low Power Shutdown Mode
This CMOS transceiver all uses a fraction of the power
required by its bipolar counterparts, but it also includes a
shutdown feature that reduces the already low quiescent I_CC
to a 10nA trickle. This device enters shutdown whenever the
receiver and driver are simultaneously disabled (RE = V_CC
and DE = GND) for a period of at least 600ns. Disabling both
the driver and the receiver for less than 50ns guarantees
that the transceiver will not enter shutdown.
Note that receiver and driver enable times increase when the
transceiver enables from shutdown. Refer to Notes 5 through 9,
at the end of the “Electrical Specification table” on page 6, for
more information.
Typical Performance Curves V_CC = 3.3V, T_A = +25°C; Unless Otherwise Specified
120
2.9
100
2.7
80
2.5
60
2.3
RDIFF = 120Ω
2.1
40
1.9
RDIFF = 54Ω
20
1.7
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
DIFFERENTIAL OUTPUT VOLTAGE (V)
FIGURE 7. DRIVER OUTPUT CURRENT vs DIFFERENTIAL
OUTPUT VOLTAGE
1.5
-60 -40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
FIGURE 8. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
200
150
Y OR Z = LOW
100
50
0
-50
-100
Y OR Z = HIGH
-150
-7 -6 -4 -2
0
2
4
6
OUTPUT VOLTAGE (V)
8 10 12
FIGURE 9. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT
VOLTAGE
600
550
ICC DE-VCC
500
450
ICC DE-GND
400
350
-60 -40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
FIGURE 10. SUPPLY CURRENT vs TEMPERATURE
10
FN6887.1
May 6, 2009