MT91600
Data Sheet
Component List* for a Typical Application with a Resistive 600 Ω Line Impendance - Refer to Figure 5 for
component designation and recommended configuration
Resistor Values
R1
220 Ω 1% (0.15% matched), 1 W
R2
220 Ω 1% (0.15% matched), 1 W
R3
43 kΩ
R4
130 kΩ
R5
220 Ω
R6
75 kΩ
R7
3 kΩ
R8
1 kΩ
R9
1 kΩ
R10
560 kΩ
R11
55 kΩ
R12
112 kΩ
R13
100 kΩ
R14
100 kΩ
R15
100 kΩ
R16
138 kΩ
R17
100 kΩ
R18
75 kΩ
R19
0Ω
R20
2 kΩ
R21
2 kΩ
R22
1 kΩ
R23
248 Ω
Capacitor Values
C1
100 nF, 5%
C2
300 nF, 5%
C3
100 pF, 5%
C4
33 nF, 20%
C5
3.3 nF, 5%
C6
1 uF, 20%, 16 V
C7
100 nF, 20%
C8
0F
C9
100 nF, 20%
C10
100 nF, 5%
C11
47 pF, 20%
C12
C13
100 nF 20%
33 nF, 10%
Diodes and Transistors
D1
D3a/b
BAS16 or equivalent
BAV99 dual diode or equivalent
D2a/b
Q1
BAV99 dual diode or equivalent
2N2222 or MPSA42 or MMBTA42
Q2
2N2907 or MPSA92 or MMBTA92
Q3
2N2222 or MPSA42 or MMBTA42
Q4
2N2907 or MPSA92 or MMBTA92
D4
1N5242 12 V Zener or equivalent
Note: All resistors are 1/4 W, 1% unless otherwise indicated.
*Assumes Zo = ZNB = 600 Ω, Gain 2 - 4 = -1 dB, Gain 4 - 2 = -1 dB.
Decoupling capacitors, (1 uF, 100 V, 20%), can be added to VDD, VEE, VBAT and VRLY to provide improved
PSRR performance.
K1 = Electro-mechanical relay, 5V, DPDT/2 FORM C
PR1 = This device must always be fitted to ensure damage does not occur from inductive loads.For simple
applications, PR1 can be replaced by a single TVS, such as 1.5KE220C, across tip and ring. For applications
requiring lightning and mains cross protection further circuitry will be required and the following protection devices
are suggested: P2353AA, P2353AB (Teccor), THBT20011, THBT20012, THBT200S (SGS-Thomson), TISP2290,
TSSP8290L (T.I.)
11
Zarlink Semiconductor Inc.