Micrel, Inc.

SY56020R

November 2010

3

M9999-111810-A

Pin Description

Pin Number

Pin Name

Pin Function

2,3

IN, /IN

inches 6mil FR4 stripline transmission line are then terminated with this differential input. Each input

pin internally terminates with 50Ω to the VT pin.

1

VT

Input Termination Center-Tap: Each side of the differential input pair terminates to VT pin. This pin

provides a center-tap to a termination network for maximum interface flexibility. An internal high

impedance resistor divider biases VT to allow input AC-coupling. For AC-coupling, bypass VT with

4

EQ

Three level input for equalization control. High, float, low.

16

VCC

possible. Supplies input and core circuitry.

8,13

VCCO

possible. Supplies the output buffers.

5

GND,

Exposed pad

Ground: Exposed pad must be connected to a ground plane that is the same potential as the

ground pins.

15,14

12,11

10,9

7,6

Q0, /Q0

Q1, /Q1

Q2, /Q2

Q3, /Q3

CML Differential Output Pairs: Differential buffered copy of the input signal. The output swing is

typically 390mV. See “Interface Applications” subsection for termination information.