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