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AC1040F

Ultra Low Power 10/100 Quad RMII Ethernet Transceiver

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Altima Communications Inc.

AC104QF

Ultra Low Power 10/100 Quad RMII Ethernet Transceiver

GENERAL DESCRIPTION

The AC104QF is a highly integrated, 3.3V, low

power, four port, 10Base-T/100Base-TX/FX,

Ethernet transceiver implemented in 0.35µm CMOS

technology. Multiple modes of operation including

normal operation, test mode and power saving mode

are available through either hardware or software

control.

Features include MAC interfaces, ENDECs,

Scrambler/Descrambler, and Auto-Negotiation

(ANeg) with support for parallel detection. The

transmitter includes a dual-speed clock synthesizer

that only needs one external clock source. The chip

has built-in wave shaping driver circuit for both

10Mbps and 100Mbps, eliminating the need for an

external hybrid filter. The receiver has an adaptive

equalizer / DC restoration circuit for accurate clock /

data recovery for the 100Base-TX signal. It also

provides an on-chip low pass filer / Squelch circuit

for the 10Base-T signal.

MAC interfaces support four ports of 10/100 RMII.

Media Interfaces support 4 ports of 10/100TX or 3

ports 10/100TX and 1 port 100FX.

FEATURES

• 4 RMII

• RMII 5Volt tolerant and 2.5Volt capable

• 4 10/100 TX or 3 10/100 TX and 1 100 FX

• Full Duplex or Half Duplex

• FEFI on 100FX

• Very small package

• 100PQFP

• Very low power – TYP < 280mW (/ port)

• Cable Detect mode – TYP < 40mW (/ port)

• Power Down mo de – TYP < 3.3mW (/ port)

• Selectable TX drivers for 1:1 or 1.25:1

transformers for additional power reduction

• 3.3Volt .35micron CMOS

• Fully compliant with

• IEEE 802.3 / 802.3u

• RMII

• UNH test labs

• Baseline Wander Compensation

• Multi-Function LED outputs

• Cable length indicator

• Reverse polarity detection and correction with

Register Bit indication – Automatic or Forced

• 8 programmable interrupts

• Diagnostic registers

BLOCK DIAGRAM

Port 0

Port 1

Port 2

Port 3

RMII/MII

Interface

MII SMI

PCS

.Framer

.Carrier Detect

.4B/5B

PMA

.Clock Recov.

.Link Monitor

.Signal Detect

25

MHz

10BASE -T

Control/Status

20

MHz

TP_PMD

100TX

.MLT-3

.BLW

.Stream Cipher

100RX

10TX

10RX

Mux

TXOP/N(3)

RXIP/N(3)

FXTP/N(3)

FXRP/N(3)

RX

FLP

MII Serial Management

Interface and Registers

PLLClk Gen.

Test/LED Control

Auto-

25

Negotiation

MHz

PHYAD[4:0]

XTLP/N CKIN TEST[3:0] LED Drivers

TXOP/N(0)

RXIP/N(0)

TXOP/N(1)

RXIP/N(1)

TXOP/N(2)

RXIP/N(2)

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