PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 35

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

Pin No.
P-LCC-44
2.2.1.3
31
30
26
27
2.2.1.4
17
34
Semiconductor Group
IOM
IOM
Pin No.
T-QFP64
M-QFP64
53
52
45
46
32
57
®
®
-2 Pins
-2 Control Pins
Symbol
DCL
FSC
DIN
DOUT
DOD
MTO
Input (I)
Output (O)
I/O
I/O
I
O
I
I
35
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.
DOUT open drain: Select open drain
with DOD = (1) (external pull-up
resistor required) and tristate with
DOD = (0).
Monitor procedure time-out: Disables
the internal 6 ms monitor time-out
when set to (1). Internal pull-down
resistor.
®
Pin Descriptions
-2 data
Data Sheet 01.99
®
-2 data
PEB 2091
PEF 2091