upd4704 Renesas Electronics Corporation., upd4704 Datasheet - Page 6

• Manufacturer Part Number: upd4704
• Description: Extension 8-bit Up/down Counter Cmos Integrated Circuits
• Manufacturer: Renesas Electronics Corporation.

PD4704
2. OPERATING PRECAUTIONS
As the PD4704 incorporates an 8-bit counter, a large transient current flows in the case of a count value which
changes all the bits (such as 00
0FF
or 7F
080
). This will cause misoperation unless the impedance of the
H
H
H
H
power supply line is sufficiently low. It is therefore recommended that a decoupling capacitor (of around 0.1 F)
be connected between V
and V
right next to the IC as shown in Fig. 4.
DD
SS
Fig. 4 Decoupling Capacitor
+5 V
C
V
DD
PD4704
C : 0.1 uF tantalum electrolytic laminated
ceramic capacitor, etc.
V
SS
6