AP89042 Aplus Integrated circuits Inc., AP89042 Datasheet - Page 18

• Manufacturer Part Number: AP89042
• Description: Voice Otp Ic
• Manufacturer: Aplus Integrated circuits Inc.

CPU Parallel Mode
Note:
Ver 3.2
1. C1 is capacitor from 0.1uF to 4.7uF depends on the kind of Vdd source and sound loudness.
2. Rb is base resistor from 120 Ohm to 390 Ohm depends on Vdd value and transistor gain.
3. T is an NPN transistor with beta larger than 150.
4. Reference value for the above components are C = 2.2uF, Rb = 390 Ohm and T = 8050D.
5. Refer to the Oscillator Resistor Table for suitable value of Rosc.
Addr[0]
Addr[1]
Addr[2]
Addr[4]
I[0..2]
VIN=+5V
•
•
•
Rin = 860KΩ x (VIN-VOUT) / VIN
Integrated Circuits Inc.
HT7335
VOUT=+3.5V
Fig. 14 5V CPU Control with COUT
R
Rin
•
•
•
OSC
0.01uF
3
RST
OSC
S1
S2
S3
S5
OUT[1..3]
•
•
•
18
VDD,VPP
VSS
COUT
Rb
C
aP89042
T
8Ω 1/4W
Speaker
May 31, 2007