ICL3238 查看數據表（PDF） - Intersil
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ICL3238 Datasheet PDF : 18 Pages
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ICL3224, ICL3226, ICL3238, ICL3244
Pin Descriptions
PIN
FUNCTION
VCC
System power supply input (3.0V to 5.5V).
V+
Internally generated positive transmitter supply (+5.5V).
V-
Internally generated negative transmitter supply (-5.5V).
GND Ground connection.
C1+
External capacitor (voltage doubler) is connected to this lead.
C1-
External capacitor (voltage doubler) is connected to this lead.
C2+
External capacitor (voltage inverter) is connected to this lead.
C2-
External capacitor (voltage inverter) is connected to this lead.
TIN
TOUT
RIN
ROUT
ROUTB
INVALID
TTL/CMOS compatible transmitter Inputs.
RS-232 level (nominally ±5.5V) transmitter outputs.
RS-232 compatible receiver inputs.
TTL/CMOS level receiver outputs.
TTL/CMOS level, noninverting, always enabled receiver outputs.
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
READY Active high output that indicates when the ICL32XX is ready to transmit (i.e., V- ≤ -4V)
FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2).
FORCEON Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high).
Typical Operating Circuits
ICL3224
+3.3V
+ 0.1µF
C1
0.1µF
C2
0.1µF
2
+ C1+
4
C1-
5
+
C2+
6
C2-
TTL/CMOS
LOGIC
LEVELS
13
T1IN
12
T2IN
15
R1OUT
19
VCC
T1
T2
R1
3
V+
+ C3
0.1µF
V- 7
17
C4
+0.1µF
T1OUT
8
T2OUT
16
5kΩ
R1IN
RS-232
LEVELS
10
R2OUT
9
R2
5kΩ
R2IN
1
READY
20
FORCEOFF
14
FORCEON
11
INVALID
GND
18
VCC
TO POWER
CONTROL
LOGIC
ICL3226
+3.3V
+
0.1µF
C1
0.1µF
C2
0.1µF
2
+
C1+
4 C1-
5
+
C2+
6
C2-
TTL/CMOS
LOGIC
LEVELS
11
T1IN
9
R1OUT
1
READY
15
VCC
T1
R1
3
V+
+ C3
0.1µF
V- 7
13
C4
+0.1µF
T1OUT RS-232
8
LEVELS
5kΩ R1IN
16
FORCEOFF
VCC
12
10
FORCEON
INVALID
GND
14
TO POWER
CONTROL
LOGIC
4
FN4876.10
March 1, 2006
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