參數(shù)資料
型號(hào)： SAB9075H
廠商： NXP SEMICONDUCTORS
元件分類： 畫(huà)面疊加
英文描述： Circular Connector; No. of Contacts:10; Series:JT02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:12-98
中文描述： PICTURE-IN-PICTURE IC, PQFP100
封裝： PLASTIC, SOT-317, QFP-100
文件頁(yè)數(shù)： 29/40頁(yè)
文件大?。?/td> 211K
代理商： SAB9075H
February 1995
29
Philips Semiconductors
Preliminary specification
Picture-in-Picture (PIP) controller for NTSC
SAB9075H
External memory
For the external memory two VDRAMS of type Mitsubishi
M5442256 are used. They have a storage capacity of
262144 words of 4-bit each and will be used in parallel.
An overview of the timing to the VDRAM is depicted in
Fig.19. Three different timing modes are shown. If the
SAB9075 is not in one of these three modes, it is in idle
mode in which all the control signals are HIGH. An idle
mode takes at least 4 clock periods. Switching from one
mode to another is always carried out via this idle mode.
The clock signal shown is an internal clock derived from
the PLLs and is approximately 27 MHz.
Main and sub-ADCs
Both main and sub-channels convert the analog input
signals to digital signals by three ADCs for each channel.
The input levels of the ADCs are equal and can set by the
MAV
refT
, SAV
refT
, MAV
refB
, and SAV
refB
pins.The
reference levels are made internally by a resistor network
which divides the analog V
DD
to a default set of preferred
signal levels of 1.5 V. If the application requires a different
set of levels the internal resistors can be shunted. External
capacitors are required to filter AC components on the
reference levels.
The resolution of the ADCs is 6-bit and the sampling is
carried out at the system frequency of 27 MHz. The
bias current I
bias
is made internally but can be increased or
decreased.
The inputs should be AC-coupled and an internal clamping
circuit will clamp the input to MAV
refB
and SAV
refB
for the
luminance channels and to
for the chrominance channels. The clamping starts at the
active edge of the burstkey.
For more information see chapter “Test and application
information”.
MAV
-----------------------2
MAV
+
L2
+
SAV
--------------------------------------------------
SAV
+
2
2
LSB
+
Output DACs
The digital processed signals are converted to analog
signals by means of three DACs. The output voltages of
these DACs are default set by the DAV
refTU
, DAV
refTV
and
DAV
refTY
pins for the TOP-levels. Default signal levels are
1.5 V. The output buffer after each DAC is a PMOS source
follower.
For more information see chapter “Test and application
information”.
HUE and SAT DACs
The HUE and SAT DACs are resistor DACs based on a
R2R network. They have a direct control from their I
2
C-bus
register and therefore their sample frequency is limited by
the I
2
C-bus frequency. The output voltage is linear with the
I
2
CV
DD
. Therefore the V
DD
of this block is a separate pin.
PLLs and clock generation
The SAB9075H has two PLLs on-board, one for the sub-
channel and one for the main-channel and the display part.
The PLLs lock to the input signals MH
sync
and SH
sync
. The
internal clock frequency is 1728 times higher which is
approximately 27 MHz in a standard NTSC system.
The positive edges of the H
sync
signals are the driving
timing points. For good short term stability they have to be
noise/jitter free.
相關(guān)PDF資料
PDF描述
SAB9076H Circular Connector; No. of Contacts:10; Series:JT02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:12-98
SAB9077 Circular Connector; MIL SPEC:MIL-DTL-38999 Series II; Body Material:Metal; Series:JT; No. of Contacts:10; Connector Shell Size:12; Connecting Termination:Crimp; Circular Shell Style:Box Mount Receptacle; Body Style:Straight RoHS Compliant: No
SAB9077H Circular Connector; No. of Contacts:10; Series:JT02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:12-98
SAB9079 Circular Connector; No. of Contacts:15; Series:JT02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:14; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:14-15
SAB9079HS Circular Connector; No. of Contacts:15; Series:JT02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:14; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:14-15
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAB9075HB-S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Picture-in-Picture Circuit
SAB9076H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Picture-In-Picture PIP controller
SAB9077 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Picture-In-Picture PIP controller
SAB9077H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Picture-In-Picture PIP controller
SAB9077HB-S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Picture-in-Picture Circuit
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