1/12

PID257*** 05/97

MSS0271

MOSEL VITELIC INC.

Preliminary

Specifications subject to change without notice, contact your sales representatives for the most recent information.

Features

Single power can operate at 2.4 V through 6 V.
Current output can directly drive either buzzer or
speaker without a transistor.
Built-in Oscillating Resistor.
Single section, 2.79 seconds (4380h).
Speech with mute (behind) is up to 21.1 seconds
(20000h).
Repeat function that can repeat up to 8 times.
To turn on LED in sink connection.
Automatic power down.
CDS interface is provided.

Either level or edge trigger type at pin TG.
Either LED flasher or BUSY output at pin LED/BZ.
Either 6200Hz or 8400Hz S.R. for built-in Rosc.
Either holdable output or not.
Either retriggerable output or not.
Either fixed or dynamic type on LED flasher.
Either 3Hz or 6Hz LED fixed flasher, (S.R. dependent).
Either Fast or Slow debounce time.

General Description

The MSS0271 is a single-chip CMOS LSI demands minimal external components and memorizes voice up to 2.88
seconds (at 6 KHz S.R.) using the MOSEL qualified coding method (MPCM-4). The chip contains most of the
necessary circuit like oscillator, PLA, D/A converter, buzzer buffer, control and timing logic. Therefore, it can apply
to various voice systems with minimum external parts. Customer speech data will be edited and programmed into
PLA by changing one mask during the device fabrication.

OSCILLATOR

ADDRESS

GENERATOR

PLA

D/A

CONTROL LOGIC

Block Diagram

SP1

2.7" VOICE ROM

SP2

Vdd

IN1

IN0

Mask options

May 1997

2/12

MSS0271

MOSEL VITELIC INC.

Preliminary

Specifications subject to change without notice, contact your sales representatives for the most recent information.

Absolute Maximum Rating

Symbol

T (Operating)

T (Storage)

V ~ V

V (TG)

V (STP)

OUT

Rating

-0.5 ~ +7.0

-10 ~ +60

-55 ~ +125

V -0.3 < V < V +0.3

V <V < V

OUT

Unit

V
V

FOSC Characteristics

6000

4000

2000

2.0

3.0

4.0

5.0

6.0

Max

Min

6700

5500

Mask = 6200Hz

8000

Vdd

Operation beyond Absolute Maximal Rating can adversely affect
device reliability

Pad Description

P20 COB

pin #

P28 COB

pin #

Pad#

Symbol

Active

i/o

Names

high

i/o

IN0

IN1

SP2

Vss

SP1

Vdd

trigger to play sound, internal pull low

LED flasher output or high true Busy signal output

input control 0

input control 1

no connection

speaker drive 2

ground

speaker drive 1

positive power supply

Operating Conditions

Symbol

VCC

Description

Ambient temperature under bias

supply voltage

sample rate

Min.

-10

2.4

typ.

6200

Max

6.0

Unit

Remarks

or 8400

AC Characteristics at 4.5 V, 6200 Hz SR

Symbol

T T1

T T2

T PUD

T THLO

T THZH

T THAS

T TLLF

T TLZL

T THAE

T AELF

T AEZL

T IWR1

T IWR2

T LED3

T LED6

T P

T R

Parameter

trigger pulse width

power up delay

trigger high to LED on

trigger high to busy high

trigger high to audio start

trigger low to LED off

trigger low to busy low

trigger low to audio end

audio end to LED off

audio end to busy low

interval when repeat

LED on time at 3 Hz

LED on time at 6 Hz

power rise up time

power ripple width

Min.

typ.

322

161

Max

Unit

Remarks

slow debounce time, SRD

fast debounce time, SRD

mask = edge, SRD

mask = level, SRD

holdable output, SRD

inside sentence

between sentences, SRD

SRD

Valid

Vdd, TG

TG, LED

TG, BUSY

TG, SPs

TG, LED

TG, BUSY

TG, SPs

TG, LED

TG, BUSY

SPs

LED

Vdd

PID257*** 05/97

3/12

MSS0271

MOSEL VITELIC INC.

Preliminary

Specifications subject to change without notice, contact your sales representatives for the most recent information.

DC Characteristics at 4.5 V

Symbol

I SB

I OP

I IH

I IL

I LED

I OH

I OL

I OHS

I OLS

I LEDT

R TG

d F/F

Parameter

standby I

operation I

input high I

input low I

output low I

output high I

output low I

output high drive I

output low sink I

threshold sound to furn LED on

pull low R

frequency stability

frequency variation

Min.

typ.

-8

-90

200

Max

200

Unit

Kohm

conditions

of IOHS

[F(4.5V) - F(4V)] / F(4.5V)

Valid

Vdd

LED

BUSY

SPs

DC Characteristics at 3.0 V

Symbol

I SB

I OP

I IH

I IL

I LED

I OH

I OL

I OHS

I OLS

I LEDT

R TG

d F/F

Parameter

standby I

operation I

input high I

input low I

output low I

output high I

output low I

output high drive I

output low sink I

threshold sound to furn LED on

pull low R

frequency stability

frequency variation

Min.

typ.

-3

-45

100

Max

150

Unit

Kohm

conditions

of IOHS

[F(3V) - F(2.7V)] / F(3V)

Valid

Vdd

LED

BUSY

SPs

Note:A bulk capacitor 0.1uF across the Vdd to Vss is demanded.

PID257*** 05/97

4/12

MSS0271

MOSEL VITELIC INC.

Preliminary

Specifications subject to change without notice, contact your sales representatives for the most recent information.

SP+ and SP-
They are tristate during standby.
They are not at standby current when the data is in the
middle.
These two pins can drive buzzer or speaker, 8 ohm or
16 ohm, directly. The speaker used should have its
band width (BW) at the center of your sound frequency
domain or you are unable to play your sound good by
this speaker.
For instance, you have your sound spans over
frequency from 100 Hz through 10 KHz. A speaker with
BW meets requirement will play this sound good. A
speaker with BW narrower than requirement (either has
higher low-cut or lower high-cutoff) will distort the sound
very much because that most of the energy of the
playback sound is unable to be played by this speaker.
This pair has zero output when sound data is zero. This
pair has full output when sound data is the highest.
This pair has half of full output when sound is silence at
middle data value. This pair has half of full output when
playing sound at appended memory-less mute.
The output depends on Vdd bias very much.
Herein zero output does not mean zero potential,
neither ground.
It is recommended to select voltage source carefully
and do not supply this chip with a voltage potential
source in poor flatness or in poor drive capability.
What the poor source means either its potential drops
as the load varies or its potential drops as its capacity
exhausted.
The speaker characeristics and housing impacts the
loudness very much.

TG
This is a high true activating signal input pin. An
internal pull low R TG is built in.
There is no schmit trigger circuit implemented.

IN0 and IN1
They should be bonded to ground both regularly.
While abnormal lot (pitch shifted) is encountered,
special bonding could be done herein.

LB
This pin could be optionally masked as either high true
Busy signal or LED flasher which is turned on in sink
way by I LED. Refers to paragrahps "Mask option" and
"terms". Up to 3 types of LED flasher could be chosen.

Terms

Audio
Audio means the signal from the pin pair SP+ and SP-.
Due to a sophisticated architecture, there demands no
ramp up (or ramp down) to eliminate the pop noise at
the sound starting and ending.

Signals

Ramp up and Ramp down
See the explanation of Audio.

Sample Rate
All the AC parameters depend on sample rate except
three - t PUD, t P and t R. The numbers mentioned in this
data sheet are based on 6 KHz sample rate if not
specified. Higher SR has quicker LED flasher, quicker
response. Lower SR has slower LED flasher, slower
response.

Retriggerable TG
Retriggerable TG means the sound played could be
terminated immediately while further TG activated and
play the sound from the very beginning.

Holdable and retriggerable
This combination allows user controlling both the output
and the input. Its output is holdable and the input could
retrigger the former. This is an exquisite feature. It is not
provided on this single trigger voice chip.

Fix flash LED
Fix 3 Hz flash means this pin turns LED lamp on for T
LED3 and then turns it off for T LED3 alternately. Fix 6 Hz
flash means quicker, it turns on T LED6 and then turns off
T LED6.
The 3 Hz as well as 6 Hz is sample rate dependent.
When repeatedly playing a word, interesting LED flash
may happen in concatenation. The word length may not
be the multiples of T LED3 (or T LED6), a new flash cycle
will start before the last flash cycle terminates.

Dymanic Flash LED
The LED turns on whenever the sound amplitude (the
current from SPs) is over a certain threshold potential (I
LEDT). The sound potential could be measured in data
value as an alternative.

Debounce time
Either Fast or Slow debounce are provided by mask
options. The Fast debounce acknowledges very short
trigger. So, the sound will play "sensitively". User should
be very carefully to choose trigger switch while "Fast
debounce" is specified.

Application Notes

Speaker
The typical application speaker is 8 ohm, 1/4 watt. Refers
to above paragraph SP+ and SP- for more description on
required speaker.

Buzzer
The recommended resonant frequency should be 1 KHz
to get the best sound response. The response BW also
should be fit to the required sound band width. Refer to
above paragraph SP+ and SP- for more description.

PID257*** 05/97

5/12

MSS0271

MOSEL VITELIC INC.

Preliminary

Specifications subject to change without notice, contact your sales representatives for the most recent information.

Choice of sample rate
The sample rate should be chosen before chip
manufactured. Two sample rates are provided on
S0271 - either 6200 KHz or 8400 KHz. User is able
to select them on the attached PRF (product request
form).

Rosc
No external Rosc is required.

Audio band amplifier transistor
No amplifier transistor is demanded.

PCB layout
To minimize the interference, the route from trigger
switch to chip should be as short as possible. The
route of trigger signal is recommended to as far away
as possible to speaker output.

CDS as trigger
to be defined.

Power On play
This chip provides power on play function. User
should be noted that the time parameter T PUD is
zero. To connect the trigger to Vdd, the sound will
be played whenever power is turned on.

Cascading
Cascading chips to have longer duration is possible by
special wiring but not recommended.

Paralleling
Paralleling chips to have more triggers is possible by
special wiring but not recommended.

Bulk Capacitor
A bulk capacitor 0.1uF across the Vdd to Vss is
demanded when using 4.5V (or higher) working voltage.
At every working voltage, the value of bulk capacitor
should be less than or equal to 0.47uF.

Bonding change while Rosc shifts
MVI S0271 provides reliable built-in Rosc by advance
technology. In case Rosc is shilfted (pitch shifted), the
bonding change is able to bias Rosc into nominal value.
The bonding changes are described on page 11/12.
While the pitch shift encountered even it is rarely, the
part number will have a postfix letter-capital "Z" while
the lot number will have the two letter extension
simultaneously. The two-letter extension could be "LH",
"HL" or "HH". This two-letter extension tells how the
bonding should be done which are described on page
11/12.

Standard Code Line Up

Code#

002

010

017

018

020

021

Title

Ho,Ho,Ho, Merry X'mas!!

Happy Hollween!!

Barking Dog

Screaming Girl

Croaking Frog

Sound of Cow

Times to

Repeat

Trigger

Edge

Level

Unhold

Irret.

Busy

6 Hz LED

3 Hz LED

Deb.

Fast

Slow

(Hz)

6.2 K

8.4 K

6.2 K

Remarks

Times to

Play

PID257*** 05/97

Электронный компонент: MSS0271

Document Outline