BLOCK DIAGRAM/PIN CONFIGURATION (Top View)
µPD4715A
+
C1
+5V
Bypass
capasitor
+10V
+
C3
1 VDD
2 C1+
3 VCC
4 C1–
5 GND
DIN1 6
TTL/CMOS
INPUT
DIN2 7
DIN3 8
DIN4 9
DIN5 10
Output control DCON 11
TTL/CMOS
OUTPUT
ROUT1 12
ROUT2 13
ROUT3 14
DC - DC
converter
C4+ 28
GND 27
C4– 26
+
C4
+
C2
VSS 25
–10V
24 STBY Standby
5 kΩ
300 Ω
300 Ω
300 Ω
300 Ω
300 Ω
23 DOUT1
22 DOUT2
21 DOUT3
20 DOUT4
19 DOUT5
18 RIN1
17 RIN2
5 kΩ
16 RIN3
RS-232
OUTPUT
RS-232
INPUT
5 kΩ
15 RCON
Threshold control
* 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.
2