GS3241 datasheet(13/108 Pages) SEMTECH

13 / 108 page

GS3241

Final Data Sheet

Rev.2

PDS-061444

September 2017

13 of 108

Semtech

Proprietary & Confidential

www.semtech.com

Note: For GSPI Timing see Table 4-11: GSPI Timing Parameters.

PLL Loop Bandwidth

BWLOOP(125Mb/s)

Setting 0.0625x

—

kHz

Setting 0.125x

—

kHz

Setting 0.25x

—

kHz

Setting 0.5x (Default)

—

kHz

Setting 1.0x

—

150

—

kHz

BWLOOP(270Mb/s)

Setting 0.0625x

—

kHz

Setting 0.125x

—

kHz

Setting 0.25x

—

kHz

Setting 0.5x

—

160

—

kHz

Setting 1.0x (Default)

—

316

—

kHz

BWLOOP(1.485Gb/s)

Setting 0.0625x

—

110

—

kHz

Setting 0.125x

—

220

—

kHz

Setting 0.25x

—

440

—

kHz

Setting 0.5x (Default)

—

876

—

kHz

Setting 1.0x

—

1750

—

kHz

BWLOOP(2.97Gb/s)

Setting 0.0625x

—

220

—

kHz

Setting 0.125x

—

440

—

kHz

Setting 0.25x

—

880

—

kHz

Setting 0.5x (Default)

—

1.76

—

MHz

Setting 1.0x

—

3.5

—

MHz

Table Notes:

1. Values achieved with Semtech evaluation board and connector.

2. Measured using a clean input source.

3. Default value for CFG_EQ_INPUT_LAUNCH_SWING_COMP parameter in control register 0x18. The default parameter value is 80d (50h).

4. Default trace driver swing Setting.

5. Rise/Fall time was measured between 80% and 20%.

6. Please see 4.3.3.1 for the further definition on Synchronous and Asynchronous Lock Time.

7. This specification applies to and DDO1/DDO1 and DDO0/DDO0.

8. Please see PLL_LOOP_ BANDWIDTH_ 1 for the full range of loop bandwidth settings.

9. Output Driver Setting of 8.

10. Output Driver Setting of 36.

11. Max jitter occurs at the maximum cable length.

Table 2-3: AC Electrical Characteristics (Continued)

VCC_SDI, VCC_CORE, VDD = 1.8V ±5% and VCCO_0, VCCO_1 = +1.2/1.8/2.5V ±5%, TA = -40°C to +85°C, unless otherwise shown.

The rise/fall time of signals at source should not be more than 62ns.

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Notes

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