Datasheet: PECL_RX - C35

Revision B, 10.09.02

Page4of6

SYMBOL OF PECL_RX

XPD

VINP

VINN

VOUTP

VOUTN

High

High

Low

High

Low

High

Low

High

Low

High

Low

X

X

High

Low

PIN LIST OF PECL_RX

Pin

Description

Type

VDDPECL

Positive Supply for PECL

Receiver

Supply

VDDA

Positive Supply

Supply

VDDCMOS

Positive Supply for CMOS

Output Buffer

Supply

VSSPECL

Negative Supply

Supply

VSSCMOS

Negative Supply

Supply

IREFP

Bias Current

Analog

IREFN

Bias Current

Analog

VMID

Voltage Reference

Analog

XPD

Power Down

Digital

SIM

Test Pin

Digital

VINP

Positive Input

Analog

VINN

Negative Input

Analog

VOUTP

Pos. PECL Output

Digital

VOUTN

Neg. PECL Output

Digital

SYMBOL OF PERXBIAS

PIN LIST OF PERXBIAS

Pin

Description

Type

VDDA

Positive Supply

Supply

VSSA

Negative Supply

Supply

IREFP1

Bias Current

Analog

IREFP2

Bias Current

Analog

IREFP3

Bias Current

Analog

IREFN1

Bias Current

Analog

IREFN2

Bias Current

Analog

IREFN3

Bias Current

Analog

VMID

Voltage Reference

Analog

XSIM

Test Pin

Digital

VREF

External Reference

Voltage

Analog

THEORY OF OPERATION

The PECL_RX is a differential line receiver which accepts low

voltage input signals according to F100K standard.

The input signal lines must be 50

Ω transmission lines. At the

receiver input each signal has to be terminated to the voltage level

resistor of 50

Ω, but also other termination schemes are possible.

The cell PECL_RX can be set in power down mode. It requires the

PERXBIAS cell for biasing. PERXBIAS can drive up to 3

PECL_RX cells. An external voltage reference must be used.