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UPD4714A Datasheet(PDF) 2 Page - NEC

Part No. UPD4714A
Description  RS-232 LINE DRIVER/RECEIVER
Download  16 Pages
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Maker  NEC [NEC]
Homepage  http://www.nec.com/
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UPD4714A Datasheet(HTML) 2 Page - NEC

 
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2
µPD4714A
BLOCK DIAGRAM/PIN CONFIGURATION (Top View)
*
VDD and Vss are output pins of voltages internally boosted. Connecting a load directly to these pins is not
recommended.
**
The standby pin is internally pulled down.
***
Use capacitors with a working voltage of 16 V or higher as C1 through C4. Insert a bypass capasitor about 0.1
to 1
µF between VCC pin to GND pin.
28
DC - DC
converter
VDD
C1
VCC
C1
GND
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+5V
C1
+
+
C3
+10V
C4
+
+
C2
–10V
DIN1
DIN2
DIN3
ROUT1
ROUT2
ROUT3
DCON
TTL/CMOS
OUTPUT
TTL/CMOS
INPUT
Output control
Threshold control
Standby
DOUT1
DOUT2
DOUT3
RIN1
RIN2
RIN3
RCON
RS-232
OUTPUT
RS-232
INPUT
C4
+
+
VSS
C4
GND
300
300
300
5 k
5 k
5 k
STBY
5 k
5 k
ROUT4
ROUT5
RIN4
RIN5
Bypass
capasitor


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