1993_Motorola_Linear_Interface_ICs_Vol_2.pdf

24 Pin
(DIP)
14
15
16
17
28 Pin
(SOIC)
16
17
19
20
MC44301
Table 2. Pin Function Description
Equivalent Internal Circuit
Vee
Vee
Envelope
Deteclor
Output
t--'l1VY----t---o PLL Lock
Detector
Vee
Envelope
Detector 0--'1/1110--..... -1
Input
Functional Description!
External Circuit Requirements
Envelope Detector Output
Detector for AM sound modulation (SECAM or
descrambler signal).
PLL Lock Detector
With 5.0 Vdc Vcc. lock is indicated by approximately
4.3 Vdc and zero signal is indicated by approximately
2.7 Vdc on this pin.
Envelope Detector Input
AM sound subcarrier input.
MOTOROLA LINEAR/INTERFACE ICs DEVICE DATA
9-250
PLL Filter
The phasedetectoroutputaiterfiltering produces a voltage
which controls the frequency of the VCO. With 5.0 Vdc
VCC. there is approximately 3.2 Vdc present when VCO is
locked and 3.1 Vdc when unlocked.
(continued)