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ICL3224E Datasheet(PDF) 3 Page - Intersil Corporation

Part No. ICL3224E
Description  15kV ESD Protected, 3V to 5.5V, 1Microamp, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ICL3224E Datasheet(HTML) 3 Page - Intersil Corporation

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3
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
TTL/CMOS compatible transmitter Inputs.
TOUT
±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs.
RIN
±15kV ESD Protected, RS-232 compatible receiver inputs.
ROUT
TTL/CMOS level receiver outputs.
ROUTB
TTL/CMOS level, noninverting, always enabled receiver outputs.
INVALID
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 ICL32XXE 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
ICL3224E
19
VCC
T1OUT
T2OUT
T1IN
T2IN
T1
T2
0.1
µF
+
0.1
µF
+
0.1
µF
13
12
17
8
2
4
3
7
V+
V-
C1+
C1-
C2+
C2-
+
0.1
µF
5
6
R1OUT
R1IN
16
5k
R2OUT
R2IN
9
10
5k
15
C1
C2
+ C3
C4
READY
1
GND
+3.3V
+
0.1
µF
18
TTL/CMOS
LOGIC LEVELS
RS-232
LEVELS
R1
R2
FORCEON
FORCEOFF
14
20
VCC
11
INVALID
TO POWER
CONTROL LOGIC
ICL3224E, ICL3226E, ICL3244E


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