ADVANCED
PIN CONFIGURATION
ML6651
44-Pin TQFP (H44-10)
BCKPLINK
FOINSPD
FOANDT
TPINSPD
TPANDT
REQSD
GNDQ
GNDB
ML6651
SDTH
44
TPOUTP
GNDT
TPOUTN
AD4LIW
AD32
AD10
PECLTP
PECLQU
VCCE
TPINP
TPINN
1
2
3
4
5
6
7
8
9
10
11
12
43
42
41
40
39
38
37
36
RTOP
RTTP
35
34
33
32
31
30
29
28
27
26
25
24
FOINP
FOINN
VCCQ
CQOS
SDFO
GNDFC
SPEED
VCCFC
DUPULEX
PWRDWN
VCCL
13
14
15
16
17
18
19
20
21
23
22
FOOUTOFF
REFCLOCK
MDIO
TPOUTOFF
VCCD
MDC
GNDL
IOUT
GNDD
GNDE
TOP VIEW
PIN DESCRIPTIONS
Pin # Signal Name
1
TPOUTP
3
TPOUTN
Description
Two operating modes are available for these pins and are selected with the configuration pin
PECLTP (pin 7) or the configuration bit LVPECLTP (bit 30.3)
Twisted Pair Interface Mode:
Transmit twisted pair positive and complementary outputs. These outputs form a differential
current output pair that drives MLT-3 waveforms into the network coupling transformer during
100 Mb/s mode, Manchester encoded 10BASE-T data or NLPs during 10 Mb/s mode, and FLP
Bursts during Auto-Negotiation.
The polarity of TPOUTP/N is such that during the transmission of a linkpulse, all the current goes
into TPOUTN than it into TPOUTP. Since there is a resistor to VCC from each of the 2 pins, the
differential voltage V(TPOUTP)-V(TPOUTN) is positive during the linkpulse.
LVPECL/PECL Compatible Interface Mode:
LVPECL or PECL interface positive and complementary outputs. These outputs form a differential
current output pair that drives NRZI encoded 100BASE-FX or 100BASE-SX symbols during 100
Mb/s mode, Manchester encoded 10BASE-FL data or OPT_IDL during 10 Mb/s mode, and FLNP
Bursts during Auto-Negotiation. TPOUTP and TPOUTN are loaded with external resistors to VCC
and AC coupled to the inputs of a 1x9 fiber optic PMD module. A resistor network may be
needed to setup the common mode voltage at the input pins of the PMD module.
4
Advanced Datasheet
September 2000
IOUT
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
