LM1237BDKENANOPB National Semiconductor, LM1237BDKENANOPB Datasheet - Page 7
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LM1237BDKENANOPB
Manufacturer Part Number
LM1237BDKENANOPB
Description
Manufacturer
National Semiconductor
Datasheet
1.LM1237BDKENANOPB.pdf
(42 pages)
Specifications of LM1237BDKENANOPB
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Through Hole
Package Type
MDIP
Lead Free Status / RoHS Status
Compliant
Typical Performance Characteristics
Figure 4 and Figure 5 show the case where the horizontal and vertical inputs are from deflection. Figure 4 shows the pin 24
voltage which is derived from a horizontal flyback pulse of 35 volts peak to peak with R
shows the pin 1 voltage which is derived from a vertical flyback pulse of 55 volts peak to peak with C
Figure 6 shows the pin 23 clamp input voltage superimposed on the neck board clamp logic input pulse. R
chosen to limit the pin 23 voltage to about 2.5V peak to peak. This corresponds to the application circuit given in Figure 9.
Cathode Response
Figure 7 shows the response at the red cathode for the application circuit in Figures 9, 10. The input video risetime is 1.5
nanoseconds. The resulting leading edge has a 7.1 nanosecond risetime and a 7.6% overshoot, while the trailing edge has a 7.1
nanosecond risetime and a 6.9% overshoot with an LM2467 driver.
FIGURE 4. Deflection Horizonal Blanking
FIGURE 6. Logic Clamp Pulse
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V
CC
7
= 5V, T
A
= 25˚C unless otherwise specified (Continued)
FIGURE 5. Deflection Vertical Blanking
FIGURE 7. Red Cathode Response
H
= 8.2K and C
4
= 1500pF and R
31
17
= 1K and should be
jumpered. Figure 5
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V
= 120K.
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