mt88ebnr Zarlink Semiconductor, mt88ebnr Datasheet - Page 15

• Manufacturer Part Number: mt88ebnr
• Description: 4-wire Calling Number Identification Circuit 2 4-wire Cnic2 Semiconductor Inc
• Manufacturer: Zarlink Semiconductor

Application Circuits
Unless stated otherwise, resistors are 1%, 0.1Watt; capacitors are 5%, 6.3V.
For 1000Vrms, 60Hz isolation from Tip to Earth and Ring to Earth:
R1,R2
If the 1000Vrms is handled by other methods then this circuit has to meet the FCC Part 68 Type B Ringer requirements:
R1,R2
Common to both sets of R1,R2:
R3,R4
R8,R9
R13
R14
R15
RING
R15 is required only if both FSK
interface mode 0 and power
down features are used.
TIP
= To Microcontroller
= From Microcontroller
430K, 0.5W, 5%, 475V min. C1,C2
(e.g. IRC type GS-3)
432K, 0.1W, 1%, 56V min. C1,C2
34K
464K
825K
226K or 26K1
100K, 20%
Figure 7 - Application Circuit: Bellcore MEI Compatible Type 2 Telephone
C2
(FSK Interface Mode 1 selected)
C1
R2
R1
D3
D1
D4
R15
D2
C3,C4
C5
C6
D1-D4
D5
Xtal
R5
R3
R4
Vss
Xtal
2n2, 1332V min.
2n2, 212V min.
2n2
100n
100n, 20%
Diodes. 1N4148 or equivalent
Diode. 1N4148 or equivalent
3.579545MHz, 0.1% crystal
or ceramic resonator
R6
Zarlink Semiconductor Inc.
R7
MT88E45
15
TIP
RING
V
IN1+
IN1-
GS1
Vss
OSC1
OSC2
CB0
DCLK
DATA
REF
MT88E45B
Telephone
Speech IC
(Symbolic)
Hybrid
or
DR/STD
ST/GT
IN2+
GS2
CB2
CB1
EST
IN2-
Vdd
Rx+
Rx-
CD
Tx+
Tx-
R5,R10
R6,R11
R7,R12
R12
R11
5V, 0dB gain
53K6
60K4
464K
R13
R14
D5
Microphone
Speaker
R8
R9
R10
C5
C6 should be
connected directly
across Vdd and Vss
pins
3V, -3.5dB gain
C3
C4
Vdd
35K7
40K2
309K
C6
Data Sheet