MC13081X Просмотр технического описания (PDF) - Motorola => Freescale

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производитель

MC13081X

Multimode Color Monitor Horizontal, Vertical, and Video Combination Processor

Motorola => Freescale 

Pin

Name

41

X–Ray

Shutdown

42

Horizontal

Drive Ground

43

Horizontal

Drive

44

Horizontal

Drive Width

MC13081X

PIN FUNCTION DESCRIPTION (continued)

Equivalent Internal Circuit

Description

If the voltage at this pin is > 0.58 V, the horizontal driver

5.0 V

device (Pins 42 and 43) will be “on” until power is

removed, or the voltage on this pin is taken below 0.4 V.

47 k

X–Ray 41

Shutdown

VCC

2.7 k

VCC

43 R43

42

To Horizontal

Deflection

Circuit

5.0 V

R44

5.0 V

24 k

44 22 k

13.5 k

Ramp 2

This emitter pin must be connected externally to a low

impedance ground.

Pin 43 is an open collector pin and normally is pulled

up by a resistor to VCC.

Maximum current through Pins 42 and 43 must be

less than 40 mA.

Varying the voltage at this pin will change the

horizontal drive duty cycle.

As the voltage of this pin is increased, the “on” time at

Pin 43 is decreased.

Input impedance is ≈ 30 kΩ.

45

Secondary

Phase

Detector Filter

Phase

Detector #2

Sync

Horiz

OSC

VCC

250 µA

45

250 µA

C45

Typically a 10 to 100 nF decoupling capacitor is

connected to this pin.

46

Horizontal

Flyback

Flyback 46

10 k

Signal

47

Video Blanking

Input

0.7 V

47

2.0 k

20 k

To Phase

Detector #2

The flyback signal should be a +VE pulse of peak

voltage 8.0 V. The internal switching voltage is 0.7 V

and it controls the secondary PLL

Input impedance is ≈ 10 kΩ

Blanking

The video blanking signal should be positive pulse in

the range of 1.5 to 4.0 V.

MOTOROLA ANALOG IC DEVICE DATA

9

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