LM1253A National Semiconductor, LM1253A Datasheet - Page 6

• Manufacturer Part Number: LM1253A
• Description: Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator
• Manufacturer: National Semiconductor

www.national.com
V
V
t
t
OS
V
V
V
V
I
V
I
t
t
t
V
V
V
V
BLK r
BLK f
IN−MAX
IN+MAX
min hflb
H
PW CLAMP
(See Figure 3 for Test Circuit, and Table 1 for Control Test Settings Chart)
Unless otherwise noted: V
(See Figure 3 for Test Circuit)
Unless otherwise noted: V
(See Figure 3 for Test Circuit)
Unless otherwise noted: V
BLANK MAX
BLANK MIN
OSDHIGH MAX
OSDHIGH 10
OSDHIGH 01
OSDHIGH 00
HBLANK TRIG
CLAMP L MAX
CLAMP H MIN
VBLANK HIGH
VBLANK LOW
Brightness/Bias Signal Electrical Characteristics
OSD Electrical Characteristics
External Interface Signals Electrical Characteristics
BLK MAX
Symbol
Symbol
Symbol
Maximum Blanking Level
Minimum Blanking Level
Blanking Rise Time
Blanking Fall Time
Maximum Rise or Fall Edge
Overshoot
Maximum OSD Level with OSD
Contrast 11
Maximum OSD Level with OSD
Contrast 10
Maximum OSD Level with OSD
Contrast 01
Maximum OSD Level with OSD
Contrast 00
Maximum normal forward scan current at
lowest horizontal frequency that input can
withstand
Voltage on H Flyback (Pin 14) which will
Trigger an HBLANK Signal
Maximum flyback scan current at 125 kHz
that input can withstand
Minimum Flyback Width
Horizontal Period
Minimum Clamp Pulse Width
Maximum Low Level Clamp Pulse Voltage
Minimum High Level Clamp Pulse Voltage
Minimum High Level of Vertical Blank
Output
Maximum Low Level of Vertical Blank
Output
CC
CC
CC
= +5V, V
= +5V, V
= +5V, V
Parameter
Parameter
Parameter
IN
IN
IN
= 0.7V, C
= 0.7V, C
= 0.7V, C
L
L
L
= 8 pF, Video Signal Output = 1 V
= 8 pF, Video Signal Output = 1 V
= 8 pF, Video Signal Output = 1 V
Test Setting 1
Test Setting 4
Test Setting 1, 10% to 90%,
Test Setting 1, 90% to 10%,
Test Setting 1, 10% to 90% or
90% to 10%, Settling Time Must
be Less Than 50 ns
Palette Set at 111. OSD Contrast
Level 11, Test Setting 3
Palette Set at 111. OSD Contrast
Level 10, Test Setting 3
Palette Set at 111. OSD Contrast
Level 01, Test Setting 3
Palette Set at 111. OSD Contrast
Level 00, Test Setting 3
6
100V H Flyback Signal
through a 100 k
Resistor
V
I
VBLANK OUT
VREF BLANK
Conditions
Conditions
Conditions
= 100 µA
<
0.75V
PP
PP
PP
, T
, T
, T
A
A
A
= 25˚C, V
= 25˚C, V
= 25˚C, V
−150
V
Min
Min
Min
200
+ 1
20
REF
1
3
LM1253A
LM1253A
LM1253A
ABL
ABL
ABL
V
V
V
V
V
V
0.90
0.95
0.77
0.59
0.41
Typ
Typ
Typ
0.8
10
10
20
REF
REF
REF
REF
REF
REF
−
+
+
+
+
= V
= V
= V
CC
CC
CC
V
.
.
.
Max
Max
Max
125
1.5
− 1
REF
1
Units
Units
Units
kHz
mA
µA
ns
ns
µs
ns
%
V
V
V
V
V
V
V
V
V
V
V