°C, unless otherwise specified)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

TIME-BASE GENERATION INTERFACES (continued)

OVERSIZE BLANKING OUTPUT (Pin 11) (see Note 3)

Output Current

10

mA

Output Voltage

0

0.4

V

Rise Time / Fall Time

Output Load = 2.2k

100

ns

HORIZONTAL OVERSIZE BLANKING (Pin 11) (see Figure 1)

Horizontal Oversize

Bus register OV_BLK_HOR1,2 = (00)

-0.3

0.3

µs

µs

Horizontal Oversize

Bus register OV_BLK_HOR1,2 = (01)

1.45

1.5

1.9

1.7

2.35

1.9

µs

µs

Horizontal Oversize

Bus register OV_BLK_HOR1,2 = (11)

2.95

2.9

3.4

3.2

3.85

3.6

µs

µs

Horizontal Oversize

Blanking Unsymmetry

Bus register OV_BLK_HOR1,2 = (11)

-0.4

0.2

0.8

µs

FH2 PHASE COMPARATOR (Pin 6)

Output Current

100

µA

∆I

Current Ratio

Ratio of charging / discharging current

(unsymmetry)

1

VRET INTERFACE (Pin 3)

Polarity of VRET

Negative pulse, starts the vertical retrace

Negative

Threshold Voltage

2.7

3.0

3.3

V

Input Current

-5

+5

µA

VERTICAL DEFLECTION

VERTICAL LOGIC (countdown circuit for vertical deflection, 50/60Hz recognition and vertical oversize blanking)

Free Running Period

No V_Sync pulses (VRET) present

377

lines

Search Window 60Hz

240

277

lines

VERTICAL OVERSIZE BLANKING (countdown circuit used also for vertical oversize blanking) (Pin 11)

Oversize Blanking Disable

OV_BLK_VERT1,2 = (0,0)

SUB_TITLE = 0 ; there is no influence of 50 or

60Hz Mode (OBLK always low-level)

No Blanking

Vertical Oversize Blanking

Subtitle Mode

SUB_TITLE = 1; values are the blanked lines

302

259

67

59

middle

of line

Vertical Oversize Blanking

Zoom 1 Mode

OV_BLK_VERT1,2 = (1,0)

SUB_TITLE = 0 ; values are the blanked lines

285

239

49

43

middle

of line

Vertical Oversize Blanking

Zoom 2 Mode

OV_BLK_VERT1,2 = (1,1)

SUB_TITLE = 0 ; values are the blanked lines

278

234

59

49

middle

of line

Vertical Oversize Blanking

Blank Mode

OV_BLK_VERT1,2 = (0,1)

SUB_TITLE = 0 ; there is no influence of 50 or

60Hz Mode (OBLK always high-level)

Full Blanking

Notes :

3.

Open collector output, polarity positive :

High (high impedance) : oversize blanking

Low (transistor pulled to Ground) : no blanking

STV2145

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