mc44bs374t1a Freescale Semiconductor, Inc, mc44bs374t1a Datasheet - Page 8

• Manufacturer Part Number: mc44bs374t1a
• Description: Pll Tuned Uhf And Vhf Audio/video High Integration Modulator
• Manufacturer: Freescale Semiconductor, Inc

10 I
WRITE MODE: Test Mode 1 and VHF Range
Sound
Video
I2C Programming
TPEN
SFD 1
PWC
SO
PS
X2
0
0
0
0
1
1
1
1
0
0
1
1
0
1
0
1
0
1
0
1
2
Sound oscillator ON (Normal mode)
Sound oscillation disabled (oscillator and PLL
section bias turned OFF)
Peak White Clip ON (System B / G)
Peak White Clip OFF (System L)
Test pattern signal OFF (normal operation)
Test pattern signal ON (picture and sound)
C Programming
SFD 0
X1
0
0
1
1
0
0
1
1
0
1
0
1
Picture-to-Sound Ratio (dB)
X0
Sound Subcarrier Freq (MHz)
0
1
0
1
0
1
0
1
Test Pattern Signal
Sound Oscillator
Peak White Clip
State
1.a
1.b
1.d
1.e
1.g
1.h
1.c
1.f
12
16
Freescale Semiconductor, Inc.
MC44BS374T1/374T1A Advance Information
For More Information On This Product,
4.5
5.5
6.0
6.5
Normal operation
RF frequency divided for low frequency testing or VHF range: RF / 2
RF / 4
RF / 8
RF / 16
DC drive applied to modulators: Non-inverted video at TVOUT
DC drive applied to modulators: Inverted video at TVOUT
Transient output inhibit disabled (ie speed up mode)
During this speed-up test mode, ATT=0 forces sound current source to 1 A, and
ATT=1 forces it to 10 A.
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UHF
Standby Mode
Logic Output Port
OSC
OSC
LOP
ATT
1
0
0
1
0
0
1
Normal operation
UHF oscillator disabled (oscillator and PLL
sections bias turned OFF)
Normal operation
Modulator output attenuation (sound and
video modulators sections bias turned OFF.
Pin 3 is low voltage
Pin 3 is high impedance
Description
SO
1
Modulator Output Attenuation
ATT
1
Modulator standby mode
UHF Oscillator
Description
Combination of 3-bits