MC13282AP 데이터 시트보기 (PDF) - Motorola => Freescale

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MC13282AP

100 MHz Video Processor with OSD Interface

Motorola => Freescale 

Pin

Name

14 Fast Commutate

MC13282A

PIN FUNCTION DESCRIPTION (continued)

Equivalent Internal Circuit

Description

This pin is used in conjunction with the RGB OSD

VCC

inputs. It is a high speed switch used for overlaying

text on picture. A logic low selects Pins 2, 4, 6. A logic

high selects Pins 8, 10, 12.

40 k

20 k

15 B Emitter Output

19 G Emitter Output

22 R Emitter Output

Video

Signal

Contrast

The video outputs are configured as emitter–followers

VCC

with a driving capability of about 15 mA each.

The dc voltage at these three emitters is set to 1.2 V

(black level).

RE = 330

Typical

The dc current through the output stage is determined

by the emitter resistors (typically 330 Ω).

16 B Clamp

Capacitor

18 G Clamp

Capacitor

21 R Clamp

Capacitor

17 Video VCC

20 5.0 Vref (V5)

1.2 V

Video Out

VCC

5.0 V

10 µF

VCC

Band Gap

Regulator

R

0.8 R

A 100 nF capacitor is connected to each of these pins.

The capacitor is used for video output dc restoration.

Connect to 8.0 V dc supply, ±5%. This VCC is for the

video output stage. It is internally connected to the

collectors of the output transistors.

5.0 V regulator. Minimum 10 µF capacitor is required

for noise filtering and compensation. It can source

up to 20 mA but not sink current. Output impedance

is ≈ 10 Ω. Recommended for use as a voltage

reference only.

MOTOROLA ANALOG IC DEVICE DATA

5

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