Sharp LZ95B25 Subcarrier generator lsl for ccd Datasheet

LZ95B25
LZ95B25
Subcarrier Generator LSl for CCD
DESCRIPTION
PIN CONNECTIONS
The U95B25 is a CMOS subcarrier signal generator LSI which provides subcarrier pulses for
color video camera, in combination
LSI (LZ95D52/M)
18-PIN MFP
TOP VIEW
B
TVMI 1
FEATURES
TVM2
. Switchable between NTSC, PAL and SECAM
systems
. Included phase comparator circuit
● Single + 5 V power supply
● Package : 18-pin MFP(MFPO1 8-P)
2
4FSI 3
4FS0 4
TST
I
5
0
18 VCC
17 GNO
16 CPI
15 SCHD
14 RPI
SC, 6
13 CFMI
SC2 7
12 TST3
TST2 8
11 CPCH
GND 9
10 EOO
RI ~.K
-----. .nlAGRAM
.........
Vcc GND CPI SCHD RPI CFMI TST, CPCH EOO
TVM I TVM2 4FSI 4FS0 TST! SCI SC2 TST2 GNO
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I
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299
LZ95B25
ABSOLUTE MAXIMUM RATINGS
PARMHER
SYMBOL
RATING
–0.3
Vcc
Supply voltage
to
UNIT
v
7.0
Input voltage
VI
– 0.3 to Vcc + 0.3
v
Output voltage
Vo
– 0.3 to Vcc + 0.3
v
Operating temperature
Topr
–20 to +70
‘c
Storage temperature
Tstg
–55 to +150
“c
DC CHARACTERISTICS
PARMHER
(VCC=+5 V*1O%, T a = – 1 0
SYMBOL
Input Low voltage
vlL
Input High voltage
vlH
I
Input Low current
CONDITIONS
MIN.
TYP.
MAX.
UNIT
1.5
v
v
3.5
Vl=r)
[IL1 I
v
I IILZ I
,,
Vl=o v
I IIH1
V I = Vcc
I
8,0
Output High voltage
Output Low voltage
Leak output current
NOTES :
1. Applied to inputs (IC, ICU, OSCI).
2. Applied to inputs (lCD, OSCI).
3. Applied to input (ICU).
4. Applied to inputs (ICU, OSCI).
5. Applied to input (lCD).
6. Applied to outputs (O, OSCO).
7. Applied to output (02M).
8. Applied to tri-state output (EOO).
300
IIH2
I
8.0
V I = Vcc
NOTE ~
1
1.0
,uA
2
60
PA
2
1.0
PA
4
60
,uA
5
Input High current
I
t o +7 UC)
vOH 1
IoH=–P
mA
4.0
v
6
vOH2
IoH=– I mA
4.0
v
7
vOH3
IoH=–6 mA
4,0
v
8
vOL1
ioL = 4 mA
0.4
v
6
vOL2
IOL = 2 mA
0,4
v
7
v0L3
IoL=12
0,4
v
1 Ioz I
High-Z
1.0
,uA
mA
8
LZ95B25
4N
.““.
SYMBOL
_.. ..— ——
1/0
I POLARITY I
1
TVM I
Icu
—
TV mode 1
2
TVM2
Icu
—
TV mode 2
FUNCTION
PIN NAME
These input pins to select TV standards.
~
An input pin for the signal 4 times the color subcarrier frequency.
3
4FSI
Oscl
nn
Colck input
At NTSC mode
: 14.31818 MHz
At PAL mode
: 17.734475 MHz
At SECAM mode : 17.625 MHz
4
4FS0
Osco
Ulr
5
TSTI
ICD
—
6
SC1
02M
Clock output
Test pin 1
The output is the inverse 4FSI (pin 4).
A test pin, Set open or to L level in the Normal
mode,
An output pin fw color subcarrier. The frequency of
Iu
Subcarrier output 1
the signals is 1/4 the 4FSI (pin 3). The signal is
reset by color frame pulse CFMI (pin 13).
An output pin for color subcarrier. When the phase
of SCI (pin 4) is 180 degree, the phase of SCZ is
7
SC2
02M
Iu
Subcarrier output 2
80 degree in NTSC mode in PAL mode, the phase
of SC2 is 80 degree when LSW (SSG-LSI) is L level
and 270 degree when LSW is H level. The SC z is
same as the phase of SC I in SECAM mode.
8
TST2
ICD
—
9
GND
—
—
Test pin 2
Ground
A test pin. Set open or to L level in the Normal
mode.
A grounding pin.
Phase comparator output for input signals RPI (pin
14) and CPI (pin 16). When CPI is advanced, output
10
EOO
TO
—
Phase comparator
output
is Low level. When CPI is delayed, output is High
level. When phases are equal, the terminal impadance is High. Pha= comparator comparates rising
edge of CPI.
The CPCH input pin switches the polarity of RPI
11
CPCH
ICD
—
Polarity select input
(pin 14). When CPCH is L level, pha~ comparator
comparates rising edge of RPI. When CPCH is H
level, phase comparator comparates falling edge
of RPI.
12
TST3
ICD
–
Test pin 3
13
CFMI
ICD
–
Color frame input
A test pin. Set open or to L level in the Normal
mode.
An input pin for color frame signal; Connect to
CFMO (SSG-LSI).
301
LZ95B25
:’.
SYMBOL
FUNCTION
1/0
POLARITY
PIN NAME
ICD
—
Horizontal comparison
the phase comparator. Connect to HD (SSG-LSI),
input
when comparator is used. The polarity of RPI se-
An input pin for the reference horizontal signal to
14
RPI
lects with CPCH (pin 11),
A horizontal synchronous pulse obtained by dividing
4FSI (pin 3).
15
SCHD
o
–
At NTSC mode
: dividing into 1/910 4FSI,
At PAL mode
: dividing into 1/1 135 4FSI
ordinarily and dividing into
Subcarrier HD
1/1 137 4FSI during one horizon tal period within the V
blanking.
At SECAM mode : dividing into 1/1 128 4FSI.
16
CPI
[CD
–
Horizontal comparison
input
An input pin for comparison horizontal signal to the
phase comparator. Connect to SCHD (pin 15) when
comparator is used,
17
GND
—
—
Ground
A grounding pin.
18
Vcc
–
.
Power supply
Supply +5 V power.
Icu
: Input pin
(CMOS level with built-in pull-up resistor).
: Input pin (CMOS level with built-in pull-up resistor).
o
: Output pin,
02M : Output pin.
TO
: Output pln (tn-state output).
OSCI : Input pin for oscillation.
OSCO : Output pin for oscillation.
ICD
302
LZ95B25
TIMING DIAGRAM
PULSE TIMING < NTSC >
4FSI
SC?
1
SC2
SC2 : 90” advanced
PULSE TIMING < PAL >
4FSI
LSW
sc~~
SC2
~
SC2 : 90” advanced
~
SC2 : 90” delayad
PULSE TIMING < SECAM >
4FSI
Sci
SC2
WI, SC2
1
I
: same phaw
1
303
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