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UT3223_17 Datasheet(PDF) 2 Page - Unisonic Technologies

Part No. UT3223_17
Description  DRIVERS/RECEIVERS
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Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
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UT3223
Preliminary
CMOS IC
UNISONICTECHNOLOGIESCO.,LTD
2 of 9
www.unisonic.com.tw
QW-R502-A91.e
MARKING
PIN CONFIGURATION
1
C2+
2
C2-
3
V-
4
R1IN
5
R2IN
6
7
8
9
T1OUT
10
T2OUT
20
C1+
19
V+
18
VCC
17
GND
16
C1-
15
FORCEON
14
13
12
11
R2OUT
UTC
UT3223
R1OUT
T1IN
T2IN
INVALID
FORCEOFF
EN
PIN DESCRIPTION
PIN NO.
PIN NAME
DESCRIPTION
1
EN
Receiver Enable Control. Drive low for normal operation. Drive high to force the
receiver outputs (R_OUT) into a high-impedance state.
2
C1+
Positive terminal of the voltage doubler charge-pump capacitor.
3
V+
+5.5V generated by the charge pump.
4
C1-
Negative terminal of the voltage doubler charge-pump capacitor.
5
C2+
Positive terminal of inverting charge-pump capacitor.
6
C2-
Negative terminal of inverting charge-pump capacitor.
7
V-
-5.5V generated by the charge pump.
8
T2OUT
RS-232 Transmitter 2 Output.
9
R2IN
RS-232 Receiver 2 Input.
10
R2OUT
TTL/CMOS Receiver 2 Output.
11
INVALID
Output of the valid signal detector. Indicates if a valid RS-232 level is present on
receiver inputs logic “1”.
12
T2IN
TTL/CMOS Transmitter 2 Input.
13
T1IN
TTL/CMOS Transmitter 1 Input.
14
FORCEON
Drive high to override automatic circuitry keeping transmitters on ( FORCEOFF must
be high) (Table 2).
15
R1OUT
TTL/CMOS Receiver 1 Output.
16
R1IN
RS-232 Receiver 1 Input.
17
T1OUT
RS-232 Transmitter 1 Output.
18
GND
Ground.
19
VCC
+3.0V ~ +5.5V Supply Voltage.
20
FORCEOFF
Drive low to shut down transmitters and on-board power supply. This over-rides all
automatic circuitry and FORCEON (Table 2).




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