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Single-Chip Voice Record/Playback Devices
16- and 20-Second Durations
)
!

	

		#
$
%
*
(
# $
!
+
#

,
#







		
#

'

		




! !
  !
(	  	

  

 

 	
 ( 
!   (
 
#

Figure: ISD1400 Series Block Diagram

ISD—APRIL 1998

i
•

-
!

•

	

7 
!
•

.
•
4	5

•

/! 	


•

 
 
 4	5

–

•

	  

•

8
/!  !
•
0  1 


•

'	 (
( 

•
92  (
 

–

•

'	!
 	 	
  /  

-
 ! 
 	
	
 






(
! 

–
•

! 
 #2 3' 4	5

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 4:;  92;5

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6
(
–
-		
 !
 ! 		

Table: ISD1400 Series Summary
Part
Number

Input Sample Rate
(KHz)

Typical Filter Pass
Band (KHz)





	





	

ii

Minimum Duration
(Seconds)

	





Voice Solutions in Silicon™
Isd 1420

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Isd 1420