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ICL3244 bảng dữ liệu(PDF) 13 Page - Intersil Corporation

tên linh kiện ICL3244
Giải thích chi tiết về linh kiện  1 Microamp, 3V to 5.5V, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown
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nhà sản xuất  INTERSIL [Intersil Corporation]
Trang chủ  http://www.intersil.com/cda/home
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ICL3244 bảng dữ liệu(HTML) 13 Page - Intersil Corporation

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13
FN4876.10
March 1, 2006
1000pF, at 120kbps. Figure 14 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.
Interconnection with 3V and 5V Logic
The ICL32XX directly interface with 5V CMOS and TTL logic
families. Nevertheless, with the ICL32XX at 3.3V, and the
logic supply at 5V, AC, HC, and CD4000 outputs can drive
ICL32XX inputs, but ICL32XX outputs do not reach the
minimum VIH for these logic families. See Table 4 for more
information.
FIGURE 12. TRANSMITTER LOOPBACK TEST CIRCUIT
FIGURE 13. LOOPBACK TEST AT 120kbps
ICL32XX
VCC
FORCEOFF
C1
C2
C4
C3
+
+
+
+
1000pF
V+
V-
5K
TIN
ROUT
C1+
C1-
C2+
C2-
RIN
TOUT
+
VCC
0.1
µF
VCC
FORCEON
T1IN
T1OUT
R1OUT
5
µs/DIV.
VCC = +3.3V
5V/DIV.
C1 - C4 = 0.1
µF
FIGURE 14. LOOPBACK TEST AT 250kbps
TABLE 4. LOGIC FAMILY COMPATIBILITY WITH VARIOUS
SUPPLY VOLTAGES
SYSTEM
POWER-SUPPLY
VOLTAGE (V)
VCC
SUPPLY
VOLTAGE
(V)
COMPATIBILITY
3.3
3.3
Compatible with all CMOS families.
5
5
Compatible with all TTL and
CMOS logic families.
5
3.3
Compatible with ACT and HCT
CMOS, and with TTL. ICL32XX
outputs are incompatible with AC,
HC, and CD4000 CMOS inputs.
T1IN
T1OUT
R1OUT
2
µs/DIV.
5V/DIV.
VCC = +3.3V
C1 - C4 = 0.1
µF
ICL3224, ICL3226, ICL3238, ICL3244



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