ML6674 View Datasheet(PDF) - Micro Linear Corporation

Part Name

Description

Manufacturer

ML6674

ATM 155Mbps UTP Transceiver

Micro Linear Corporation 

ML6674

PIN CONFIGURATION

ML6674

32-Pin PCC (Q32)

RXOUT+

RVCCD

SD–

SD+

N/C

TGNDD

LPBK

TXOFF

N/C

4 3 2 1 32 31 30

5

29

6

28

7

27

8

26

9

25

10

24

11

23

12

22

13

21

14 15 16 17 18 19 20

RRSET1

RRSET2

N/C

N/C

RGND

N/C

N/C

TVCCA

TGNDA

ML6674

32-Pin TQFP (H32-7)

RRSET1

TPIN–

TPIN+

CMREF

N/C

N/C

RVCCA

RXOUT–

32 31 30 29 28 27 26 25

1

24

2

23

3

22

4

21

5

20

6

19

7

18

8

17

9 10 11 12 13 14 15 16

TPOUT–

TPOUT+

RTSET2

RTSET1

TVCCD

TXIN–

TXIN+

N/C

PIN DESCRIPTION

NAME

FUNCTION

TXIN+, TXIN–

These differential ECL100K compatible

inputs receive NRZ data from the PHY

for transmission.

TPOUT+,

TPOUT–

Outputs from the NRZ buffer drive

these differential current outputs. The

transmitter filter/transformer module

connects the media to these pins.

LPBK

This TTL input enables transmitter-

Receiver loopback internally when

asserted low.

TXOFF

This TTL input forces the NRZ driver to

a high impedence state when asserted

low and shuts off transmit bias currrent.

RTSET1,

RTSET2

TVCCA,

TVCCD

An external 1% resistor connected

between these pins controls the

transmitter output current amplitude.

IOUT = 32 x 1.25V/RTSET

Separate analog and digital

transmitter power supply pins help to

isolate sensitive circuitry from noise

generating digital functions. Both

supplies are nominally +5 volts.

TGNDA,

TGNDD

Analog and digital transmitter grounds

provide separate return paths for clean

and noisy signals.

NAME

SD+, SD–

TPIN+, TPIN–

RXOUT+,

RXOUT–

RRSET1,

RRSET2

CMREF

RVCCA,

RVCCD

RGND

FUNCTION

These differential ECL100K

compatible outputs indicate the

presence of a data signal with an

amplitude exceeding a preset

threshold.

NRZ encoded data from the

receiver filter/transformer module

enters the Receiver through these

pins.

Differential ECL100K compatible

outputs provide NRZ encoded data

to the PHY.

Internal time constants controlling

the equalizer’s transfer function

are set by an external resistor

connected across these pins.

This pin provides a DC common

mode reference point for the

receiver inputs.

Analog and digital supply pins are

separated to isolate clean and

noisy circuit functions. Both

supplies are nominally +5 volts.

Receiver ground.

2

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