MC44CC375AVEFEVK Freescale Semiconductor, MC44CC375AVEFEVK Datasheet - Page 3

• Manufacturer Part Number: MC44CC375AVEFEVK
• Description: CCEVK NEJA EVAL KIT
• Manufacturer: Freescale Semiconductor
• Type: Modulatorr

Specifications of MC44CC375AVEFEVK

• For Use With/related Products: MC44CC375AV
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4151738; T0704786

Digital Home
Freescale Semiconductor
MC44CC375AV device.
1.
POWER SUPPLY
vice.
STANDBY MODES
power consumption. The sound oscillator, UHF oscillator and
VHF dividers, video and sound modulator sections bias are
internally turned OFF.
pin 16, PSAVE, is set to a “LO” level
Figure 2 shows a simplified block diagram of the
There are two main sections:
Do NOT bias any other pin before V
During standby mode, the modulator is switched to low
The modulator is programmed in standby mode when
A PLL section to synthesize the VHF output channel
frequency for channel 3 or channel 4.
PSAVE
RFOUT
SOC
CHS
V
CC
12
11
16
1
3
Section
Control
GND
2
Figure 2. MC44CC375AV Simplified Block Diagram
CC
is applied to the de-
Prescaler
FUNCTIONAL OVERVIEW
RF Sound
Modulator
Modulator
Video
÷
8
VHF Dividers
÷
Program
Divider
÷
N11:N0
White
2
Peak
FM
31.25 kHz
2.
of the UHF tank circuit and certain filtering functions eliminat-
ing the need for a number of external components.
TRANSIENT OUTPUT INHIBIT
the UHF PLL is acquiring a lock on the desired frequency, the
Sound and Video modulators are turned OFF at power-ON
(i.e., V
This allows the UHF PLL to settle to its programmed frequen-
cy. During the 263 ms time-out, the sound PLL current source
is set to 10 µA typical to speed up the locking time. After the
263 ms time-out, the current source is switched to 1.0 µA.
Use care when selecting loop filter components to ensure the
loop transient does not exceed this delay.
Program
Divider
The high frequency CMOS technology allows integration
Sound
To minimize the risk of interference to other channels while
There is a time-out of 263 ms until the output is enabled.
PLLFLT
VIDEO
PFD
UHF OSC
A modulator section which accepts audio and video
inputs and modulates the VHF carrier.
(2 x F
Phase
Comp.
Clamp
8
14
CC
VCO and PLL SECTION
o
31.25 kHz
)
is switched from 0 V to 3.3 V).
LPF
Modulator
Oscillator
and FM
Sound
SPLFLT
7
Ref Divider
÷
ALC
128
MODULATOR
SECTION
XO Prescaler
Amplifier
(4 MHz)
Audio
XTAL
XCO
4
13
10
15
9
6
5
AUDIO
PREEM
V
GND
AUX
NO
CONNECT
MC44CC375AV
CC
3