CS8952T datasheet(4/86 Pages) CIRRUS

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DS206TPP2

CS8952T

CrystalLAN™ 100BASE-X and 10BASE-T Transceiver

CIRRUS LOGIC ADVANCED PRODUCT DATABOOK

INTRODUCTION

The CS8952T is a complete physical-layer trans-

ceiver for 100BASE-TX and 10BASE-T applica-

tions. It provides a Physical Coding Sub-layer for

communication with an external MAC (Media Ac-

cess Controller), a complete Physical Medium At-

tachment layer, and a 100BASE-TX and 10BASE-

T Physical Medium Dependent layer.

High Performance Analog

The highly integrated mixed-signal design of the

CS8952T eliminates the need for external analog

circuitry such as transmit or receive filters. The

CS8952T builds upon Cirrus Logic’s experience in

pioneering the high-volume manufacturing of

10BASE-T integrated circuits with “true” internal

filters. The CS8952T, CS8920, CS8904, and

CS8900 include fifth-order, continuous-time But-

terworth 10BASE-T transmit and receive filters, al-

lowing those products to meet 10BASE-T wave

shape, emission, and frequency content require-

ments without external filters.

Low Power Consumption

The CS8952T is implemented in low power

CMOS, consuming only 135 mA typically. Three

low-power modes are provided to make the

CS8952T ideal for power sensitive applications.

Application Flexibility

The CS8952T’s digital interface and operating

modes can be tailored to efficiently support a wide

variety of applications. For example, the Media In-

dependent Interface (MII) supports 100BASE-TX

and 10BASE-T NIC cards, switches and routers.

Additionally, the low-latency “repeater” interface

mode minimizes data delay through the CS8952T,

facilitating system compliance with overall net-

work delay budgets. To support 10BASE-T appli-

cations, the CS8952T provides a 10BASE-T serial

port (Seven-wire ENDEC interface).

Typical Connection Diagram

Figure 1 illustrates a typical MII to CS8952T appli-

cation with twisted-pair interfaces. Refer to the De-

sign

Considerations

section

for

detailed

information on power supply requirements and de-

coupling, crystal and magnetics requirements, and

twisted-pair transceiver connections.

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