W523X Datasheet, PDF (5/6 Pages) Winbond – Power Speech LOW VOLTAGE ADPCM VOICE SYNTHESIZER

TYPICAL APPLICATION CIRCUIT
W523X
V_DD
Speaker
8 ohm
1/4 watt
8050D
TG1 ₁
TG2 ₂
TG3 ₃
TG4/LED2/STPC
4
LED1 ₅
R
STPB
6
STPA ₇
NC ₈
Cs Rs
SPK ₉
VSS ₁₀
W523X
20 ^TEST
19 ^NC
18 ^NC
17 ^NC
16 ^NC
15 ^NC
14 ^NC
13 ^OSCO
12 ^{OSCI Rosc}
11 ^VDD
Notes:
1. In principle, the playing speed determined by ROSC should correspond to the sampling rate during the coding phase.
The playing speed may be adjusted by varying ROSC, however.
2. Rs is an optional current-dividing resistor. If Rs is added, the resistance should be between 470 and 750 Ω.
3. R is used to limit the current on the LED.
4. Cs is optional.
5. The DC current gain β of transistor 8050 ranges from 120 to 200.
6. All unused trigger pins can be left open because of their internal pull-high resistance.
7. No warranty for production!
Publication Release Date: March 1996
-5-
Revision A2