ADVANCED
ML6651
PIN CONFIGURATION
ML6651
44-Pin TQFP (H44-10)
44 43 42 41 40 39 38 37 36 35 34
TPOUTP
GNDT
1
2
33
FOINP
FOINN
VCCQ
32
31
30
29
28
27
26
25
24
23
TPOUTN
AD4LIW
AD32
3
4
CQOS
5
SDFO
AD10
6
GNDFC
SPEED
PECLTP
PECLQU
VCCE
7
8
VCCFC
DUPULEX
PWRDWN
VCCL
9
TPINP
10
11
TPINN
12 13 14 15 16 17 18 19 20 21 22
TOP VIEW
PIN DESCRIPTIONS
Pin # Signal Name
Description
1
TPOUTP
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)
3
TPOUTN
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
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
