參數(shù)資料
型號: PEF24902H
英文描述: ?Quad ISDN Echocancellation Circuit Analog Front End - 2B1Q/4B3T Code?
中文描述: ?四整體數(shù)位服務(wù)網(wǎng)路Echocancellation電路模擬前端- 2B1Q/4B3T代碼?
文件頁數(shù): 53/73頁
文件大?。?/td> 1618K
代理商: PEF24902H
PEB 2466
PEF 2466
Application Hints
Hardware Reference Manual
44
2001-02-20
7.2
Guidelines for Board Design
7.2.1
Filter Capacitors
For high frequency noise rejection, use 100 nF SMD ceramic capacitors on pins
V
DDA12
,
V
DDA34
and
V
DDREF
and connect to GND. Additional 2.2 μF tantalum capacitors
are recommended.
Use one 100 nF SMD ceramic capacitor on pin
V
DDD
and connect to GNDD.
Use a 1
μ
F
10
μ
F tantalum capacitor from +5 V supply to GND (central blocking).
Note: All blocking capacitors MUST be placed as close as possible to the
SICOFI
4-μC pins.
.
Figure 27
SICOFI
4-μC Test Circuit Configuration
SICOFI4-μC
PEB 2466-H
PCLK
FSC
DRB
DXB
TCB#
DRA
DXA
TCA#
V
DDD
RESET#
MCLK
GNDD
DOUT
DIN
DCLK
CS#
V
IN4
V
IN3
GNDA3
V
IN2
V
REF
GNDA4
V
OUT4
V
DDA34
V
OUT3
V
DDREF
GNDA2
V
OUT2
V
DDA12
V
OUT1
GNDA1
V
IN1
C
I
S
S
S
S
S
S
S
S
S
S
S
S
S
S
C
I
S
S
S
S
S
S
S
S
S
S
S
S
S
S
1-10μF
100nF
10K
PCM Interface
32
Micro-
controller
Interface
Signaling Interface, Channels 1&2
Signaling Interface, Channels 3&4
Analog Interface
2.2μF 100nF
1
16
17
33
48
49
64
5V
5 x 680K
5 x 680K
5 x 680K
5 x 680K
1μF
10μ
F
2.2μF 100nF
1μF
220nF
2.2μF 100nF
2.2μF 100nF
1μF
10μF
2.2μF 100nF
1μF
5V
5V
5V
10μF
10μF
5V
5V
4.7K
4.7K
2466_228
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