GS2972 datasheet(86/125 Pages) SEMTECH

tên linh kiện	GS2972

Giải thích chi tiết về linh kiện	3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support

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86 / 125 page

GS2972 3G/HD/SD-SDI Serializer with Complete

SMPTE Audio & Video Support

Final Data Sheet

Rev. 9

GENDOC-047479

September 2013

86 of 125

www.semtech.com

4.12.3 Slew Rate Selection

The GS2972 supports two user-selectable output slew rates.

Control of the slew rate is determined by the setting of the RATE_SEL0 input pin.

When this pin is set HIGH, the output slew rate matches the requirements as defined by

the SMPTE ST 259-C standard.

When this pin is set LOW, the output slew rate is better than the requirements as defined

by the SMPTE ST 424 standard.

These requirements is met across all ambient temperature and power supply operating

conditions described in Section 2.

This requirement is summarized in Table 4-31:

4.12.4 Serial Digital Output Mute

When the SDO_EN/DIS pin is LOW, the serial digital output signals of the device become

high-impedance, reducing system power.

The serial digital output is also placed in the high-impedance state when the LOCKED

pin is LOW, or when the STANDBY pin is HIGH.

Table 4-31: Serial Digital Output - Rise/Fall Time

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Serial Output Rise/Fall Time

20% ~ 80%

SDOTR

SMPTE ST 292/ST 424 signal

−−

135

SMPTE ST 259-C signal

400

−

800

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