
W528XXX
Publication Release Date: March 1999
- 15 - Revision A1
B. Trigger Pin Coupling Effect
The trigger pins (TG1
TG4) are built-in 500 K
pull high resistor.
If the wire of the input trigger is very close to the speaker wire in the application environment, the
coupling effect will occur. The input voltage of the trigger pin will be unstable, causing the trigger
operation to become abnormal.
An external pull high resistor (Ri) connecting the trigger pin and V
DD
can resolve this problem. The
value of the Ri depends on your application environment.
V
DD
SPK
TGn
V
DD
Ri
Headquarters
No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: 886-3-5770066
FAX: 886-3-5792697
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-27197006
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-27190505
FAX: 886-2-27197502
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II,
123 Hoi Bun Rd., Kwun Tong,
Kowloon, Hong Kong
TEL: 852-27513100
FAX: 852-27552064
Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.
2727 N. First Street, San Jose,
CA 95134, U.S.A.
TEL: 408-9436666
FAX: 408-5441798
Note: All data and specifications are subject to change without notice.