參數(shù)資料
型號: PSB21911
廠商: SIEMENS A G
元件分類: 數(shù)字傳輸電路
英文描述: ISDN Echocancellation Circuit for Terminal Applications IEC-Q TE
中文描述: DATACOM, ISDN ECHO CANCELLER
文件頁數(shù): 20/164頁
文件大?。?/td> 1401K
代理商: PSB21911
PSB 21911
PSF 21911
Pin Definitions and Functions
Semiconductor Group
20
11.97
PU: internal pull-up resistor
PD: internal pull-down resistor
IOM
-2 Pins
31
53
DCL
DCL
O
Data Clock
Data clock output 512 or 1536 kHz
(table 2 on page 26). In μP mode this
pin can be programmed to deliver a bit
clock (256 or 768 kHz).
Frame Synchronization Clock
The start of the B1-channel in time-slot
0 is marked. FSC = (1) for one DCL-
period indicates a superframe marker.
FSC = (1) for at least two DCL-periods
marks a standard frame.
Data In
Input of IOM-2 data synchronous to
DCL-clock (Data upstream direction).
Data Out
Output of IOM-2 data synchronous to
DCL-clock. Open drain or tristate
depending on bit/pin DOD (Data
Downstream direction).
30
52
FSC
FSC
O
26
45
DIN
DIN
I
27
46
DOUT
DOUT
O
U-Interface Pins
15
29
AIN
AIN
I
Differential U-Interface Input
Connect to hybrid.
Differential U-Interface Input
Connect to hybrid.
Differential U-Interface Output
Connect to hybrid.
Differential U-Interface Output
Connect to hybrid.
14
28
BIN
BIN
I
6
16
AOUT
AOUT
O
4
13
BOUT
BOUT
O
Pin No.
P-LCC-44 T-QFP64
Symbol
Stand-
alone
I/O
Function
μP
mode
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