參數(shù)資料
型號(hào)： ICL3243E
廠商： Intersil Corporation
英文描述： ±15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transmitters/Receivers(±15kV ESD 防護(hù), +3V至+5.5V, 1微安, 250kbps, RS-232收發(fā)器)
中文描述： ± 15kV的ESD保護(hù)，3V至5.5V，1Microamp，250kbps的和RS - 232發(fā)送器/接收器（± 15kV的ESD防護(hù)，采用3V至5.5V的，1微安，250kbps的，RS - 232接口收發(fā)器）
文件頁(yè)數(shù)： 15/28頁(yè)
文件大?。?/td> 562K
代理商： ICL3243E
15
FN4910.19
June 22, 2007
.
Mouse Driveability
The ICL3241E and ICL3243E have been specifically
designed to power a serial mouse while operating from low
voltage supplies. Figure 9 shows the transmitter output
voltages under increasing load current. The on-chip
switching regulator ensures the transmitters will supply at
least
±
5V during worst case conditions (15mA for paralleled
V+ transmitters, 7.3mA for single V- transmitter). The
Automatic Powerdown feature does not work with a mouse,
so FORCEOFF and FORCEON should be connected to V
CC
.
High Data Rates
The ICL32xxE maintain the RS-232
±
5V minimum
transmitter output voltages even at high data rates.
Figure 10 details a transmitter loopback test circuit, and
Figure 11 illustrates the loopback test result at 120kbps. For
this test, all transmitters were simultaneously driving RS-232
loads in parallel with 1000pF, at 120kbps. Figure 12 shows
the loopback results for a single transmitter driving 1000pF
and an RS-232 load at 250kbps. The static transmitters were
also loaded with an RS-232 receiver.
.
TIME (20μs/DIV)
T1
T2
2V/DIV
5V/DIV
V
CC
= +3.3V
C1 - C4 = 0.1μF
FORCEOFF
FIGURE 8. TRANSMITTER OUTPUTS WHEN EXITING
POWERDOWN
FIGURE 9. TRANSMITTER OUTPUT VOLTAGE vs LOAD
CURRENT (PER TRANSMITTER, i.e., DOUBLE
CURRENT AXIS FOR TOTAL V
OUT+
CURRENT)
T
LOAD CURRENT PER TRANSMITTER (mA)
0
2
4
6
8
10
-6
-4
-2
0
2
4
6
-5
-3
-1
1
3
5
1
3
5
7
9
V
OUT
+
V
OUT
-
V
CC
V
OUT
+
V
OUT
-
T1
T2
T3
V
CC
= 3.0V
ICL3241E, ICL3243E
FIGURE 10. TRANSMITTER LOOPBACK TEST CIRCUIT
FIGURE 11. LOOPBACK TEST AT 120kbps
FIGURE 12. LOOPBACK TEST AT 250kbps
ICL32xxE
V
CC
FORCEOFF
C
1
C
2
C
4
+
C
3
+
+
+
1000pF
V+
V-
5K
T
IN
R
OUT
C1+
C1-
C2+
C2-
R
IN
T
OUT
+
V
CC
0.1μF
V
CC
EN
SHDN OR
T1
IN
T1
OUT
R1
OUT
5μs/DIV
V
CC
= +3.3V
C1 - C4 = 0.1μF
5V/DIV
T1
IN
T1
OUT
R1
OUT
2μs/DIV
5V/DIV
V
CC
= +3.3V
C1 - C4 = 0.1μF
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
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