PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 284

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

Semiconductor Group
Figure 122
8.7.7
Note 84: In case the period of signals is stated the time reference will be at 1.4 V;
Figure 123
1) Applies only with a crystal which has the properties given in "Oscillator Circuit and Crystal", page 252
IOM
2.2 V
0.5 V
R
in all other cases 0.8 V (low) and 2.0 V (high) thresholds are used as
reference.
Timing Properties of CLS
Generation
Clock
Dynamic Characteristics of CLS
Clock Requirements in NT-PBX
IOM
t
R
DCL
FSC
FSC*
R
%
-Frame
15.36 - MHz XTAL Master Clock
t
H
IEC-Q
Frame Adapt
284
t
F
IOM
1)
R
%
-Frame
t
L
Electrical Characteristics
U-Frame
512 kHz
CLS
%
Data Sheet 01.99
ITD04265
PEB 2091
PEF 2091
U