Semiconductor
February 1999
CT
T
ODU CEMEN 7
PR
774
ETE
PLA
SOL DED RE 800-442-
OB
EN
om
s 1-
OMM lication harris.c
EC
NO R ntral App entapp@
Ce
: c
Call or email
CD22354A,
CD22357A
CMOS Single-Chip,
Full-Feature PCM CODEC
TO SLIC
[ /Title
(CD22
354A,
CD223
57A)
/Sub-
ject
(CMO
S Sin-
gle-
Chip,
Full-
Fea-
ture
PCM
CODE
C)
/
Author
()
/Key-
words
(Har-
ris
Semi-
con-
ductor,
RSLIC
18,
Tele-
com,
SLICs,
SLACs
, Tele-
phone,
Tele-
phony,
WLL,
Wire-
less
Local
Loop,
Features
• Meets or Exceeds All AT&T D3/D4 Specifications and CCITT
Recommendations
• Complete CODEC and Filtering Systems: No External Components
for Sample-and-Hold and Auto-Zero Functions. Receive Output Fil-
ter with (SIN X)/X Correction and Additional 8kHz Suppression
• Variable Data Clocks - From 64kHz . . . . . . . . . . . . . . . . . . . . . 2.1MHz
• Receiver Includes Power-Up Click Filter
• TTL or CMOS-Compatible Logic
• ESD Protection on All Inputs and Outputs
Description
The CD22354A and CD22357A are monolithic silicon-
gate, double-poly CMOS integrated circuits containing
the band-limiting filters and the companding A/D and D/A
conversion circuits that conform to the AT&T D3/D4
specifications and CCITT recommendations. The
CD22354A provides the AT&T
µ-law
and the CD22357A
provides the CCITT A-law companding characteristic.
The primary applications for the CD22354A and
CD22357A are in telephone systems. These circuits
perform the analog and digital conversions between the
subscriber loop and the PCM highway in a digital
switching system. The functional block diagram is
shown below.
With flexible features, including synchronous and
asynchronous operations and variable data rates, the
CD22354A and CD22357A are ideally suited for PABX,
central office switching system, digital telephones as
well as other applications that require accurate A/D and
D/A conversions and minimal conversion time.
Applications
• PABX
• Central Office Switching Systems
• Accurate A/D and D/A Conversions
• Digital Telephones
• Cellular Telephone Switching Systems
• Voice Scramblers - Descramblers
• T1 Conference Bridges
• Voice Storage and Retrieval Systems
• Sound Based Security Systems
• Computerized Voice Analysis
• Mobile Radio Telephone Systems
• Microwave Telephone Networks
• Fiber-Optic Telephone Networks
Ordering Information
PART
NUMBER
CD22354AE
CD22357AE
TEMP.
RANGE (
o
C) PACKAGE PKG. NO.
-40 to 80
-40 to 80
16 Ld PDIP E16.3
16 Ld PDIP E16.3
Pinout
CD22354A, CD22357A
(PDIP)
TOP VIEW
V- 1
GND 2
VF
R
O 3
V+ 4
FS
R
5
D
R
6
BCLK
R
/ 7
CLKSEL
MCLK
R
/ 8
PDN
16 VF
X
1+
15 VF
X
1-
14 GS
X
13 TS
X
12 FS
X
11 D
X
10 BCLK
X
9 MCLK
X
Functional Block Diagram
FULL-FEATURE PCM CODEC
FROM SLIC
GS
X
VF
X
1-
VF
X
1+
14
15
16 +
ANTI-ALLAS
FILTER
XMIT
LOW
PASS
FILTER
XMIT
HIGH
PASS
FILTER
TRANSMIT COMPARATOR
D/A
LADDER
SIGN
BIT INT.
PARALLEL
TO
SERIAL
11
10
12
13
9
8
5
D/A
REGISTER
SERIAL
TO
PARALLEL
R
CV
DIGITAL
+5V
-5V
4
1
V+
V-
7
6
D
X
BCLK
X
FS
X
TS
X
MCLK
X
DDIGITAL IN
MCLK
R
/
PDN
FS
R
BCLK
R
/
CLKSEL
D
R
DDIGITAL OUT
XMIT
V
REF
S.A.R.
XMIT
CLOCK
CIRCUIT
R
CV
CLOCK
CIRCUIT
GND
2
R
CV
V
REF
XMIT DIGITAL
BAND
GAP
REFERENCE
VF
R
O
3
SMOOTHING
FILTER
RECEIVE
LOW PASS
FILTER
RECEIVE
D/A LADDER
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
©
Harris Corporation 1999
File Number
1682.4
4-165
HARRIS [ HARRIS CORPORATION ]
