PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 269

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

Pin Capacitances
T
Pin
DIN, PS1, PS2, DCL (input), FSC
(input), DOUT (open)
XIN, XOUT
All other pins
8.7
Inputs are driven to 2.4 V for a logical "1" and to 0.4 V for a logical "0". Timing
measurements are made at 2.0 V for a logical "1" and 0.8 V for a logical "0". The AC
testing input/output wave forms are shown in Figure 103 below.
Figure 103
8.7.1
The microprocessor interface timing in the parallel mode has been accelerated. This
allows using the IEC-Q in applications which demand high data transmission rates, e.g.
PCM-4, 8, or in applications with high speed microcontroller.
Semiconductor Group
A
= 25 °C; V
0.45
2.4
AC Characteristics
Microprocessor Interface Timing in Parallel Mode
DD
Input/Output Wave form for AC Tests
= 5 V
2.0
0.8
Test Points
5 %; V
SS
2.0
0.8
= 0 V; f
Symbol
C
C
C
IO
IO
IO
C
269
= 1 MHz
min.
Limit Values
max.
10
5
7
Device
Under
Test
Electrical Characteristics
Unit
pF
pF
pF
Data Sheet 01.99
C
Load
PEB 2091
PEF 2091
= 150
ITS00621
pF