ISD



 
  
  
 
 ! 
"#  
$%&%  
##! '( 
 )
*! # '*

+*

( )
, # '*

+*

()
 '( )
-.+ !&/ '0()
-.+ /&/ '0( )
   '(1
'(1
 2 '  3( 1
$ ,  ',( 1
!  ' 4( 1
!  ' ( 1
5 .  '67( 1
. # '8+ 9( :
## # ';9<( :
  :
   =
; > ##! ! =
 >   .# =
)>4#=
1 > ##! ! =
: > #/ ##! =
=>4#=
 , ,  ?
0   * @A *,   4 '7, ( ;
0   * @A *,   4 '( :
34  6  =
  ?
:;;  A0   <
, 3  )

Voice Solutions in Silicon™

3! B :;; # #  )
3! )B   ?
3! 1B -.  ?
3! :B  5$  =
3! =B )C& ;?;;& #   .! '( '(  <
3! ?B )C& ;1;;& # $  !  '( '(  C
3! <B :;; # "! #   D
 B  !  '

(  ;
 )B  A$ #  ;
 1B -  '

(  ;
 :B # - ;
 =B  !  '

(  :
 ?B  A$ #  :
 <B -  '

(  :
 CB # - :
- B / -. #
- )B 5 . $ #  1
- 1B  # -  =
- :B -# 5$$ !# '.! #(  <
- =B ! # '.! #(  <
- ?B  $# '.! #(  <
- <B  $# '.! #(  C
- CB -# 5$$ !# '( 
- DB ! # '( 
- ;B  $# '( 
-B $#'(  )
- )B #   .! '( '( $##  <
- 1B # $  ! '( '( $## C
- :B :;; #  #!#+ % #  'E$(  );
i
ISD—APRI L 1998

2$ ! /#F :;; 
## /# !&G+ #!& 
-. ## #& $##!!
#  / #   &
 #+ $ $2+ &
$ ! + #! 2+ #$! 2&
+  #. $2 $$$ 
-. #-##$  - 2! % $&
+ #.+ #/ ##/#+ % #&
-#+  % #
!#  # & /
$$ #+ /! H&% $##!
#! # G+ #!& # # $
##- ! I#  $/ #!
! *   #!# #
  $$    2$+ /!
!&G+ #&# / 

Sin
g
le-Chip Voice Record/Playback Devices
16- and 20-Second Durations
Figure i: ISD1400 Series Block Diagram

ii
Voice Solutions in Silicon

#&&# #!& / -.
#
A!&G+  / 
#&- 2
-.  - !&  /&
/
!& # 2 ? ); ##
$ %&% $
# #- $ $$ 2&
%!   -. 
-  ;= E '(
J&% $##! #!
$# - -. #
3 ##-  $
$##!#
;;& $##!  '(
;;+;;;  # '(
& . #
 !$$  /$ ##$

! 8= / % #
/-   2$+ +  
.!!
# $ '9:;K  8C=K(
/## /-
Table i: ISD1400 Series Summary
Part
Number Minimum Duration
(Seconds) Input Sample Rate
(KHz) Typical Filter Pass
Band (KHz)
 
 

1
ISD


 :;; ## # /# 22  ?:
 C; 7AH #$! 2G#+ %!
#  2 # G # 
# #$# #   &
/ $$ %  !H 
$## ## %  ## &
 ! #! /# / + 
#!  2 /+ $#+ #+
 # 22# /- % $# #&
# ! ##

 $ ##$ G$#+  :;;
## 22# #!& ## ?  ); #&
#

 2  -2# 2 F#  !
#  # 2 & / $$+ /!
H&% $##! #!  $##! # &
 2 ;; #  % %
 +  /  - & &
 / ;;+;;; $#

 :;;  ## /#  &
 - #!  #!+ +   2
% #&-  -. #!#+ 0
'!&/ -.(+  0 '/&&
/ -.(  :;; #  2!&
 2 #$ 2 #!  #!&$##!
 4#!  ## # % % $&
$##! # /  #
5  ! =
 
  2 -.   +
:;; ## /# $
%&% #- $+ #$! 
;= E ! -. +  / %&
# % $   2  $#&
#! !  +  / %#
% $$ 2 # # A,A
!"
  /! #$ $##! -.+
:;; ## /# 2 ##! &
-
 :;; ## #! # ?; #
##- #!$#+ /! 2%!
##  2$ 2 :;;
## -#
Table 1: Device Playback/Record
Durations
Part Number Minimum Duration
(Seconds)
  
  

2
Voice Solutions in Silicon
Figure 1: ISD1400 Series Pinouts

    

NOTE
     
     
  
#!#

#

"
! ! #    :;;
## # # % -## $$H #
   # % -##  -!
# # .!  # -
! # #  # # ##- # $&
   % # -  #
# # ##-  .!
!#

#

"
$ *

 *

+ ! !
#   :;; ## # #
! -## $$H # # # #
-  ! # # # ##-  /
!"
   #  /&@  #!
/ # %/  # @ # #!
$# $ @ 2  2  &
!  .#  /  -.
'0 0( #! 2  #  @ !
-. +  -. $$
##  ! -!#
  # $ %  # 
A,A $$ # # 2
 &2&$##! $. ' ( #  &
+ -! #-#G -.
$   / $&
 %# % #- $ % 
!# A,A
$ #!"
@ @&!! # #  #
 #!+ -.  -!# -.
#    #  
2 $$ # #  4 $&
 2  -. +  / $&
 %# %  #- $ .!
0 A,A ! -.  %  $&
   
$# #!"
@ #  #! ## 2$ A,A 
@+ -.  #  -. &
#  0 #  A,A+   $. #
+   2 $$ # #
  / $ %# %
#- $  $ 2 &
-. 
NOTE
  !  "#$%  "#$%#  
#&'  &( &)*!    
    
    +!
    "#$%  "#$%#  
  , 
 -  . 
      
 

3
ISD
!"
  # @ !  
  - #  /   / 2&
-.    # !##  +
 ## @ $$ %  #
  -. 
!"
 $  #2# # #!   &
 $2  & $ ,
 ',(  #  ! 2 #
$2 2$ 9= ): "  5 $&
 # -  #  / #&
#   /+ ! %
 ; 7
## # + &
$ %&2G 22 2  :;; #&
# ##-   2$ 2
 2$ %&2G 22
#
!"
  3  #  /!  $&
 $2 # /# #&&
! $$&$ L 
/ %  22 $&

!"
 , $ L##  ! 2
$2 $# 2  % ! 2
$  /# , %# 2
! 2 #+ 2$ %##  ##+ 
-  % $$ #  M.N
$ # $ -  $ # 2 = 7
 ##  5  '?
 #$  3! :(  2$
,  *

! !  M#N $
# $ - $ # 2  5
## '=(  5  '?( &
  -%  ,  *

! ! $ /# 2 :<; 7

:< E3 !/ ##2 ##  $# ##
!"
#  /# $2    #&
  /! ! 2  $2 # &
$ - /! /  , 
!"
    #2#  #!  
2 ! 3 $ #+   4
 # -  / 5 &
   #  /+ !&
 % 1; 7
 $ 2  + #
#  !/  22  %&2&
G 2  / ##- 2 #
 # / 2$ # $&
+  #!  - 2+ / &
+      
%$!%$"
 5 .  2  :;; /#
#   &% / :;; #
2!  2