TB1245N datasheet(76/101 Pages) TOSHIBA

Part #	TB1245N

Description	TOSHIBA Bi-CMOS INTEGRATED CIRCUIT SILICON MONOLITHIC

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Manufacturer	TOSHIBA [Toshiba Semiconductor]

Direct Link	http://www.semicon.toshiba.co.jp/eng

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76 / 101 page

TB1245N

2001-07-26

76

TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C ; BUS = preset value)

SW MODE

SUB-ADDRESS & BUS DATA

NOTE

ITEM

S21 S22 S31 S33 S34 S51 S42

—

00H 02H 05H 1CH 08H 1DH

MEASURING METHOD

(1) Input 0.3 V synchronizing signal to pin 48 (Sync IN).

(2) Input 100 kHz, 0.3 Vp-p sine wave signal to both pin 33 (B-Y IN)

and pin 34 (R-Y IN).

(3) Connect pin 21 (Digital Ys) and pin 22 (Analog Ys) to ground.

(4) Set bus data so that drive is at center value, Y mute is on and color

limiter is OFF.

(5) While changing bus data on

unicolor from maximum (FF) to

minimum (00), measure maximum

and minimum amplitudes of pin 12

(B OUT) in video period

respectively, and read the bus data

together with. Also, measure

respective amplitudes as unicolor

data is set at center value (80).

(Vn12mx, Vn12mn, D12n80)

(Vn14mx, Vn14mn, D14n80)

T7

Unicolor Control

Characteristic

B

A

―

—

FFH

80H

00H

—

80H

—

3FH

(6) Find ratio between amplitude with maximum unicolor data and that

with minimum unicolor data in conversion into decibel (∆V14un).

T8

Relative Amplitude

(NTSC)

↑

A

↑

A

—

FFH

—

↑

—

↑

While inputting rainbow color bar signal (3.58 MHz for NTSC) to pin 42

and 0.3 V synchronizing signal to pin 48 so that video amplitude of pin

33 is 0.38 Vp-p, find the relative amplitude.

(Mnr-b = Vu14mx / Vu12mx, Mng-b = Vu13mx / Vu12mx)

T9

Relative Phase

(NTSC)

↑

—

↑

—

↑

—

↑

(1) In the test condition of the Note T8, adjust bus data on tint so that

output of pin 12 (B OUT) has the peak level in the 6th bar.

(2) Regarding the phase of pin 12 (B OUT) as a reference phase, find

comparative phase differences of pin 14 (R OUT) and pin 13 (G

OUT) from the reference phase respectively (θnr-b, θng-b).

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TB1245N Datasheet(PDF) 76 Page - Toshiba Semiconductor

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