GS2986 datasheet(7/41 Pages) SEMTECH

7 / 41 page

GS2986 Multi-Rate SDI Reclocker with Equalization &

De-emphasis

Data Sheet

52134 - 3

July 2012

7 of 41

VCC_DDO0

Power

Most positive power supply connection for the DDO0/DDO0 output driver.

Connect to 3.3V or 2.5V.

VEE_DDO0

Power

Most negative power supply connection for the DDO0/DDO0 output

driver.

Connect to GND.

XTAL_BUF_OUT

Output

Buffered output of the reference oscillator.

XTAL+

Output

Reference crystal output.

XTAL-

Input

Reference crystal input.

CS/EQ3_EN

Input/Logic

Input

In host mode (HIF set LOW):

Chip select input for SPI serial host interface. Active-low input.

In non-host mode (HIF set HIGH):

Trace equalization on/off pin for Serial Digital Differential Input 3.

Active-high input.

SCK/EQ2_EN

Input/Logic

Input

In host mode (HIF set LOW):

Burst-mode clock input for SPI serial host interface.

In non-host mode (HIF set HIGH):

Trace equalization on/off pin for Serial Digital Differential Input 2.

Active-high input.

SDO/EQ1_EN

Input/Logic

Input

In host mode (HIF set LOW):

Serial digital data output for SPI serial host interface. Active-high output.

In non-host mode (HIF set HIGH):

Trace equalization on/off pin for Serial Digital Differential Input 1.

Active-high input.

SDI/EQ0_EN

Input/Logic

Input

In host mode (HIF set LOW):

Serial digital data input for SPI serial host interface. Active-high input.

In non-host mode (HIF set HIGH):

Trace equalization on/off pin for Serial Digital Differential Input 0.

Active-high input.

VEE_CP

Power

Most negative power supply connection for the internal

charge pump. Connect to GND.

VCC_CPPower

Most positive power supply connection for the internal charge pump.

Connect to 3.3V or 2.5V

LF+

Passive

Loop Filter capacitor connection. (CLF = 47nF). Connect as shown in Typical

Application Circuit on page 37.

−

Center Pad

−

Ground pad on bottom of package. Connect to GND.

Table 1-1: GS2986 Pin Descriptions (Continued)

Pin Number

Name

Type

Description

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