MSSI121 查看數據表（PDF） - Mosel Vitelic Corporation

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MSSI121

INSTANT VOICE ROM

Mosel Vitelic Corporation  

MOSEL VITELIC

MSSI121/241/241B

2. Cascade Application (To get longer than 12/24 seconds) you have to avoid these two chips play at the same time, it

might danger the speaker

R1

VDD

OSC

COUT

TG

STP

INTP

VSS

R1'

VDD

S

OSC

COUT

T

TG

R2

INTP

VSS

3. CDS Application

R1

VDD

S

OSC

COUT

TG

T

R2

VSS

4. Equivalent to Level type trigger under "Edge option"

R1

VDD

S

OSC

COUT

T

TG

R2

REP

VSS

Note: 1. R1 = 1.2 M Ω, T(transistor) = ß > 130, S(speaker) = 1/4 w, 8 Ω; all typical.

2. R2 = 470 Ω ( typical ) to bypass extra current into base to get rid of waveform saturation on collector .

3. Piezo buzzer resonant frequency is around 1K Hz.

4. Input switch could be replaced by CDS.

5. VOUT1,VOUT2 are tristate during stand by .

6. If using MSM9159 writer, use its new version MSM9159B to program MSSI121/241/241B chips. Do not

use the old version MSM9159 writer. The difference between two version of writer should refer to its

data sheet ( PID 330B ).

7. Power on play function plays only one time regardless the number to repeat.

MOSEL NO. 1, Creation Rd. 1, Hsinchu Science-Based Industrial Park, Hsinchu, Taiwan, R.O.C.

TEL:886-3-578-3344 FAX:886-3-577-2788

3910 North First Street San Jose. CA. 95134-1501 U.S.A.

TEL:1-408-433-6000 FAX:1-408-433-0952

™A∞»±MΩu∂«Ø8u°8G6-3-5784732

5

PID224B 04/95

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