PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 44

• Manufacturer Part Number: PEF2091
• Description: ICs for Communications(ISDN Echocancellation Circuit)
• Manufacturer: Siemens Semiconductor Group

Semiconductor Group
Pin No.
P-LCC-44
2.2.2.5
31
30
26
27
2.2.2.6
15
14
6
4
IOM
U-Interface Pins
Pin No.
T-QFP64
M-QFP64
53
52
45
46
29
28
16
13
®
-2 Pins
Symbol
DCL
FSC
DIN
DOUT
AIN
BIN
AOUT
BOUT
Input (I)
Output (O)
I/O
I/O
I
O
I
I
O
O
44
Function
Data clock: Clock range 512 kHz to
4096 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
synchronous to DCL-clock.
Corresponds to DD (data downstream)
in LT and DU (data upstream) in
NT applications.
Data out: Output of IOM
synchronous to DCL-clock.
Corresponds to DD (data downstream)
in NT and DU (data upstream) in
LT applications.
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.
®
Pin Descriptions
-2 data
Data Sheet 01.99
®
-2 data
PEB 2091
PEF 2091