MT8931CP Zarlink Semiconductor, MT8931CP Datasheet - Page 26

• Manufacturer Part Number: MT8931CP
• Description: Description = 4 Wire Full-duplex 2B+D (192Kb/s) Data Format Isdn S And T Subscriber Network Interface Circuit ;; Package Type = Pdip ;; No. Of Pins = 28
• Manufacturer: Zarlink Semiconductor

26
U Reference
R
R
‡
‡
Point
DC to DC
Converter
‡
100Ω terminating resistor
1:2
1:2
+5V
+5V
V
2kΩ
R
Figure 17 - NT1 using the MT8910-1 (DSLIC) and MT8931C (SNIC)
DD
Tx
10k
Termination
V
LRx
MH89101
LTx
Network
Bias
IRQ
MT8931C
Data Port
Figure 18 - ISDN Digital Telephone Set
XTAL1
XTAL2
DSTo
DSTi
C4b
F0b
IRQ
L
L
L
L
out+
in+
in-
out-
MT8910-1
DSLIC
8051
DSTo
DSTi
C4b
F0b
Power Supply
Power Feed
DATA1 SCLK CS
and
DSTi
DSTo
F0i
C4i
+5V
MT9094
C4b
F0b
DSTo
DSTi
HSPKR+
Microprocessor
HSPKR-
SPKR+
SPKR-
MT8931C
NT Mode
S12-1
MIC+
MIC-
M+
M-
V
Bias
LRx
LTx
‡
100Ω
V
DD
terminating resistor
10µF
R
1
4
7
*
Tx
Microphone
Speaker
2
5
8
0
2:1
2:1
Handset
Data Sheet
3
6
9
#
Display
S Reference
K
e
y
p
a
d
Point
R
R
‡
‡