FN4805.21 March 1, 2006 Mouse Driveability The ICL324X have been specifically designed to power a serial mouse while operating from low " />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� ICL3241CV-T
寤犲晢锛� Intersil
鏂囦欢闋佹暩(sh霉)锛� 6/28闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC 3DRVR/5RCVR RS232 3V 28-TSSOP
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 2,500
椤炲瀷锛� 鏀剁櫦(f膩)鍣�
椹�(q奴)鍕�(d貌ng)鍣�/鎺ユ敹鍣ㄦ暩(sh霉)锛� 3/5
瑕�(gu墨)绋嬶細 RS232
闆绘簮闆诲锛� 3 V ~ 5.5 V
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 28-TSSOP锛�0.173"锛�4.40mm 瀵級
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 28-TSSOP
鍖呰锛� 甯跺嵎 (TR)
14
FN4805.21
March 1, 2006
Mouse Driveability
The ICL324X 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 卤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 VCC.
High Data Rates
The ICL32XX maintain the RS-232 卤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 (20
s/DIV)
T1
T2
2V/DIV
5V/DIV
VCC = +3.3V
FORCEOFF
FIGURE 8. TRANSMITTER OUTPUTS WHEN EXITING
POWERDOWN
C1 - C4 = 0.1
F
FIGURE 9. TRANSMITTER OUTPUT VOLTAGE vs LOAD
CURRENT (PER TRANSMITTER, i.e., DOUBLE
CURRENT AXIS FOR TOTAL VOUT+ CURRENT)
TRA
N
SMI
TTER
O
U
TPUT
VO
LT
AG
E
(V
)
LOAD CURRENT PER TRANSMITTER (mA)
024
68
10
-6
-4
-2
0
2
4
6
-5
-3
-1
1
3
5
1
3579
VOUT+
VOUT -
VCC
VOUT+
VOUT -
T1
T2
T3
VCC = 3.0V
ICL3241/43
FIGURE 10. TRANSMITTER LOOPBACK TEST CIRCUIT
FIGURE 11. LOOPBACK TEST AT 120kbps
FIGURE 12. LOOPBACK TEST AT 250kbps
ICL32XX
VCC
FORCEOFF
C1
C2
C4
C3
+
1000pF
V+
V-
5K
TIN
ROUT
C1+
C1-
C2+
C2-
RIN
TOUT
+
VCC
0.1
F
VCC
EN
SHDN OR
T1IN
T1OUT
R1OUT
5
s/DIV
VCC = +3.3V
5V/DIV
C1 - C4 = 0.1
F
T1IN
T1OUT
R1OUT
2
s/DIV.
5V/DIV.
VCC = +3.3V
C1 - C4 = 0.1
F
ICL3221, ICL3222, ICL3223, ICL3232, ICL3241, ICL3243
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
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鍙冩暩(sh霉)鎻忚堪
ICL3241CVZ 鍔熻兘鎻忚堪:RS-232鎺ュ彛闆嗘垚闆昏矾 RS232 3V 3D/5R SHTDWN 28TSSOP COM RoHS:鍚� 鍒堕€犲晢:Exar 鏁�(sh霉)鎿�(j霉)閫熺巼:52 Mbps 宸ヤ綔闆绘簮闆诲:5 V 闆绘簮闆绘祦:300 mA 宸ヤ綔婧害鑼冨湇:- 40 C to + 85 C 瀹夎棰�(f膿ng)鏍�:SMD/SMT 灏佽 / 绠遍珨:LQFP-100 灏佽:
ICL3241CVZ-T 鍔熻兘鎻忚堪:RS-232鎺ュ彛闆嗘垚闆昏矾 RS232 3V 3D/5R SHTDWN 28TSSOP COM RoHS:鍚� 鍒堕€犲晢:Exar 鏁�(sh霉)鎿�(j霉)閫熺巼:52 Mbps 宸ヤ綔闆绘簮闆诲:5 V 闆绘簮闆绘祦:300 mA 宸ヤ綔婧害鑼冨湇:- 40 C to + 85 C 瀹夎棰�(f膿ng)鏍�:SMD/SMT 灏佽 / 绠遍珨:LQFP-100 灏佽:
ICL3241E 鍒堕€犲晢:INTERSIL 鍒堕€犲晢鍏ㄧū:Intersil Corporation 鍔熻兘鎻忚堪:銆�15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transmitters/Receivers
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ICL3241ECAT 鍒堕€犲晢:Intersil Corporation 鍔熻兘鎻忚堪:
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