LM1880 Datasheet PDF - National Semiconductor


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LM1880
National Semiconductor

Part Number LM1880
Description No-Holds Vertical/Horizontal
Page 10 Pages

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June 1987
LM1880 No-Holds Vertical Horizontal
General Description
The LM1880 uses compatible Linear I2L technology to pro-
duce the first T V horizontal and vertical processing system
which completely eliminates the hold controls The heart of
the system is a precision 32 times horizontal frequency VCO
which is designed to use a low-cost ceramic resonator as a
tuning element
The VCO signal is divided down in the horizontal section to
produce a pre-driver output which is locked to negative sync
by means of an on-chip phase detector The vertical output
ramp is injection-locked by vertical sync subject to a sync
window derived from the vertical countdown section A gate
pulse centered on the chroma burst is also provided
Features
Y No frequency set-up required for horizontal or vertical
Y Ceramic resonator frequency reference
Y Accurate horizontal pre-driver duty cycle
Y Vertical sync window referenced to horizontal
Y Precise interlaced vertical output
Y APC loop parameters completely adjustable
Y Vertical retrace time adjustable
Y Chroma burst gate output
Y Internal voltage regulator
Y Improved vertical lock time
Block Diagram
C1995 National Semiconductor Corporation TL H 7915
TL H 7915 – 1
RRD-B30M115 Printed in U S A



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Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Current (Pin 9)
40 mA
Output Voltage (Pins 8 12 13)
12V
Output Current
Pin 8
Pin 12
Pin 13
50 mA
15 mA
10 mA
Sync Input Voltage (Pins 10 14)
5 Vp-p
Sawtooth Input Voltage (Pin 1)
5 Vp-p
Package Dissipation TA e a25 C
Above TA e 25 C Derate Based on
TJ(MAX) e a150 C and iJA e a90 C W
1400 mW
Storage Temperature Range
b55 C to a150 C
Operating Temperature Range
0 C to a70 C
Lead Temperature (Soldering 10 sec )
a260 C
Electrical Characteristics (Test Circuit all SW normally pos 1 TA e 25 C Va e 12V)
Parameter
Conditions
Min Typ
Regulated Voltage (Pin 9)
82 87
Supply Current (Pin 9)
VCO Reference Voltage (Pin 3)
SW 7 Pos 2 V9 e a7 5V
12 18
51
VCO Control Current (Pin 2)
V2 e 5V
0 25
Horizontal Phase Detector
Sink Current (Pin 2)
SW 1 SW 4 Pos 2
V1 e 3 9V V2 e 5V
03 05
Horizontal Phase Detector
Source Current (Pin 2)
SW 1 SW 4 Pos 2
V1 e 1 9V V2 e 5V
03 05
Horizontal Output Leakage
(Pin 8 OFF Condition)
Change SW 3 to Pos 2
with Pin 8 High
Horizontal Output Saturation Voltage
(Pin 8 ON Condition)
Change SW 3 to Pos 2
with Pin 8 Low
0 15
Vertical Output Saturation
Voltage (Pin 12)
SW 3 SW 5 Pos 2
0 25
Burst Gate Saturation
Voltage (Pin 13)
SW 1 SW 4 Pos 2
V1 e 1 9V
0 15
Horizontal Oscillator Free-Running
Frequency (Pin 8) (Note 1)
SW 2 Pos 2
15 550
15 750
Horizontal Oscillator Maximum
Frequency (Pin 8)
V2 e 7V
16 300
Horizontal Oscillator Minimum
Frequency (Pin 8)
V2 e 3V
Vertical Minimum Lock Frequency (Pin 12)
Vertical Maximum Lock Frequency (Pin 12)
Note 1 Assumes ceramic resonator fR e 503 48 kHz
fH e 15 734 Hz
SW 6 Pos 2 fH e 15 734 Hz
61 7
Max
92
24
10
150
04
05
04
15 950
15 150
55 0
Units
V
mA
V
mA
mA
mA
mA
V
V
V
Hz
Hz
Hz
Hz
Hz
Design Parameters (Application Circuit)
Parameter
Conditions
Min Typ Max Units
Horizontal Pull-In Range
g600
Hz
Horizontal Static Phase Error (S P E )
Horizontal Output Duty Cycle
DfH e g600 Hz
g0 5
50
ms
%
Horizontal Oscillator Supply Sensitivity
b1 Hz V
Vertical Output Retrace Time
600 ms
Burst Gate Width
Flyback Width e 12 ms
5
ms
2



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Test Circuit
Order Number LM1880J
See NS Package Number J14A
TL H 7915 – 2
Typical Performance Characteristics
VCO Control Characteristic
Horizontal Free-Running
Frequency vs Temperature
TL H 7915 – 3
3
TL H 7915 – 4



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Typical Application
Printed Circuit Layout
MuRata Corporation of America Part No CSB503B
TL H 7915 – 5
TL H 7915 – 6
4




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