ISL3259E Datasheet, PDF (11/15 Pages) Intersil Corporation – ±15kV ESD Protected, 100Mbps, 5V, PROFIBUS®, Full Fail-safe RS-485/RS-422 Transceivers

ISL3259E
Low Power Shutdown Mode
This BiCMOS transceiver uses a fraction of the power
required by their bipolar counterparts, but it also includes a
shutdown feature that reduces the already low quiescent I_CC
to a 50nA trickle. It 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 60ns 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 8, 9,
10, 11 and 12, at the end of the “Electrical Specifications”
table on page 6, for more information.
Typical Performance Curves V_CC = 5V, T_A = +25°C; Unless Otherwise Specified
110
100
90
80
70
60
50
40
30
20
10
0
0
+25°C
+85°C
R_D = 20Ω
R_D = 30Ω
R_D = 54Ω
R_D = 100Ω
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
DIFFERENTIAL OUTPUT VOLTAGE (V)
FIGURE 8. DRIVER OUTPUT CURRENT vs DIFFERENTIAL
OUTPUT VOLTAGE
3.5
3.4
R_D = 100Ω
3.3
3.2
3.1
3.0
2.9
2.8
2.7
R_D = 54Ω
2.6
2.5
-40
-15
10
35
60
85
TEMPERATURE (°C)
FIGURE 9. 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 10. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT
VOLTAGE
2.55
2.50
2.45
2.40
2.35
DE = V_CC, RE = X OR DE = GND, RE = GND
2.30
-40
-15
10
35
60
85
TEMPERATURE (°C)
FIGURE 11. SUPPLY CURRENT vs TEMPERATURE
11
FN6587.0
November 13, 2007