mt88e45bsr Zarlink Semiconductor, mt88e45bsr Datasheet - Page 17

• Manufacturer Part Number: mt88e45bsr
• Description: 4-wire Calling Number Identification Circuit 2
• Manufacturer: Zarlink Semiconductor

Example:
•
•
•
For a gain of -3.5 dB, A
R7
R5
Therefore R6
A
v
-3.5dB
-3.5dB
is now 309 K/464 K = 0.666
Interrupt Source 1
MT88E45B
Interrupt Source 2
= 464 K x 0.668 = 309K9, the closest standard resistor value is 309 K.
= 53K6 x 0.666 = 35K7, the closest standard resistor value is 35K7.
(Open Drain)
DR/STD
(CMOS)
(CMOS)
-3.5dB
INT1
INT2
Figure 9 - Application Circuit: Multiple Interrupt Source
is calculated to be 40K4, the closest standard resistor value is 40K2.
R1 can be opened and
D1 shorted if the
microcontroller does not
read the INT1 pin.
v
=10
Vdd
Resistor (R1)
-3.5/20
Zarlink Semiconductor Inc.
D1
= 0.668
MT88E45
17
Vdd
Resistor (R2)
INT(input)
Input Port Bit
Microcontroller
Data Sheet