VIN

CSOUT

HSOUT

BPOUT

TBPOUT

BLANKING LEVEL

WHITE LEVEL

- SYNC

OH

TRAILING

EDGE

50%

SLICE

50%

50%

+ SYNC

VIDEO

tdBPOUT

THSOUT

tdHSOUT

tdCSOUT

VIDEO INPUT RANGE

0.5 VPP to 2 VPP

1 VPP (typ.)

LEADING

EDGE

LMH1981

www.ti.com

SNLS214H – APRIL 2006 – REVISED MARCH 2013

Table 1. SDTV Horizontal Interval Timing Characteristics (NTSC, PAL, 480I, 576I)(1)(2)

Symbol

Parameter

Conditions

Typ

Units

tdCSOUT

Composite Sync Output Propagation Delay from Input Sync

See Figure 9

NTSC, 480I

475

ns

Reference (OH)

PAL, 576I

525

tdHSOUT

Horizontal Sync Output Propagation Delay from Input Sync

See Figure 9(1)

NTSC, 480I

40

ns

Reference (OH)

PAL, 576I

60

tdBPOUT

Burst/Back Porch Timing Output Propagation Delay from

See Figure 9

300

ns

Input Sync Trailing Edge

THSOUT

Horizontal Sync Output Pulse Width

See Figure 9

2.5

µs

TBPOUT

Burst/Back Porch Timing Output Pulse Width

See Figure 9

3.2

µs

(1)

Note: HSync propagation delay variation less than ±3 ns (typ) over 0°C to 70°C temperature range.

(2)

VCC = 3.3V , TA = 25°C

Table 2. EDTV Horizontal Interval Timing Characteristics (480P, 576P)

Symbol

Parameter

Conditions

Typ

Units

tdCSOUT

Composite Sync Output Propagation Delay from Input Sync

See Figure 9

450

ns

Reference (OH)

tdHSOUT

Horizontal Sync Output Propagation Delay from Input Sync

See Figure 9

35

ns

Reference (OH)

tdBPOUT

Burst/Back Porch Timing Output Propagation Delay from Input Sync

See Figure 9

500

ns

Trailing Edge

THSOUT

Horizontal Sync Output Pulse Width

See Figure 9

2.3

µs

TBPOUT

Burst/Back Porch Timing Output Pulse Width

See Figure 9

350

ns

HDTV Horizontal Interval Timing

Figure 10. HDTV Horizontal Interval with Tri-level Sync

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