LA70100M View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LA70100M

SECAM Chroma-Signal Processor IC for VCR

SANYO -> Panasonic 

LA70100M

(Note 11) Output impedance of SECAM DET (R28)

Assign to V28 as when generating 100µA from pin 28 by adding 5V to pin 27

and take “H”, and calculate R28.

VCC

5(V) - V28

28

R28=

100µA

Fig.5

(Note 12) The sync signal at T29 must lag behind the SECAM color bar signal synchronization by 1.5µs (Fig. 1).

(Note 13) The sync signal at T29 must lag behind the PAL color bar signal synchronization by 1.5µs (Fig. 6).

100%

PAL color bar signal

T16

1Vpp

1.5µs

4.433619MHz

21.5%

T29

Fig.6

(Note 14) PB mode phase detection output differential voltage :

VSAPD1 : Assign to VPD1 the DC voltage at T25 when a sine wave of 1.0625MHz is input to T14 and VPD2 the DC

voltage at T26 when a sine wave of 1.1016MHz is input.

VSCPD1=VPD2 - VPD1

VSAPD2 : Assign to VPD3 and VPD4 the voltage at T25 and T26, respectively, when a sine wave of 627kHz is input

to T14.

VSCPD2=VPD4 - VPD3

(Note 15) PB mode SECAM detection characteristics VSCMP1 / VSCMP2 :

VSCMP1 : Apply the above-mentioned VPD1 and VPD2 to T25 and T26, respectively and measure the voltage at T28.

VSCMP2 : Apply the above-mentioned VPD3 and VPD4 to T25 and T26, respectively and measure the voltage at T28.

No.7204-6/16

Share Link: