
12
FN6045.6
May 13, 2010
Typical Performance Curves VCC = 3.3V, TA = +25°C
FIGURE 12. TRANSMITTER OUTPUT VOLTAGE vs LOAD
CAPACITANCE
FIGURE 13. SLEW RATE vs LOAD CAPACITANCE
FIGURE 14. SUPPLY CURRENT vs LOAD CAPACITANCE
WHEN TRANSMITTING DATA
FIGURE 15. SUPPLY CURRENT vs LOAD CAPACITANCE
WHEN TRANSMITTING DATA
FIGURE 16. SUPPLY CURRENT vs SUPPLY VOLTAGE
Die Characteristics
SUBSTRATE AND QFN THERMAL PAD POTENTIAL
(POWERED UP):
GND
TRANSISTOR COUNT:
ISL3232E: 296
ISL4221E: 286
ISL4223E: 357
PROCESS:
Si Gate CMOS
-6
-4
-2
0
2
4
6
1000
2000
3000
4000
5000
0
LOAD CAPACITANCE (pF)
TRANSMIT
T
E
R
OUTPUT
VOLTAGE
(V
)
1 TRANSMITTER AT 250kbps
VOUT+
VOUT -
OTHER TRANSMITTERS AT 30kbps
LOAD CAPACITANCE (pF)
SL
EW
R
A
T
E
(V
/
s)
0
1000
2000
3000
4000
5000
5
10
15
20
25
+SLEW
-SLEW
0
5
10
15
20
25
30
45
35
40
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
SUPP
LY
CURRENT
(m
A)
20kbps
250kbps
120kbps
ISL4221E
0
5
10
15
20
25
30
45
35
40
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
SUPP
LY
C
URRENT
(m
A)
20kbps
250kbps
120kbps
ISL4223E/ISL3232E
S
U
P
LY
CURR
E
N
T
(mA)
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0
0.5
1.0
1.5
2.0
SUPPLY VOLTAGE (V)
2.5
3.0
3.5
NO LOAD
ALL OUTPUTS STATIC
ISL3232E, ISL4221E, ISL4223E