ML6692 Ver la hoja de datos (PDF) - Micro Linear Corporation

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ML6692

100BASE-TX Physical Layer with MII

Micro Linear Corporation 

ML6692 SCHEMATIC

Figure 8 shows a general 10BASE-T and 100BASE-TX

design using the ML2653 (10BASE-T PHY) and ML6692

(100BASE-TX PHY).

The inductors L1 and L2 are for the purpose of improving

return loss. Capacitor C7 is recommended. It decouples

some noise at the inputs of the ML6692, and improves the

Bit Error Rate (BER) performance of the board. We

ML6692

recommend having a 0.1µF Cap on every VCC pin as

indicated by C3, 4, 9-12. Also, we recommend splitting

the AVCC, AGND and DGND. It is recommended that

AGND and DGND planes are large enough for low

inductance. If splitting the two grounds and keeping the

ground planes large enough is not possible due to board

space, you could join them into one larger ground plane.

ML6692 PARTS LIST

COMPONENT

DESCRIPTION

U1

ML6692 52-Pin PLCC surface mount

U2

Can Crystal Oscillator, 25MHz 4-pin surface mount

U3

ML2653 28-pin PLCC surface mount

U4

93LC46 8-pin PLCC surface mount EEPROM

U5

BEL Transformer Module 5558-1287-02, or XFMRS Inc.

XF6692TX, or Valor ST6129 (not pin compatible)

U6

HEX Inverter 74HC04

X1

20MHz XTAL surface mount

FB1, FB2

Fair-Rite SM Bead P/N 2775019447

L1, L2

130nH inductors rated at 50MHz

R1

2.49kW 1% 1/8W surface mount

R2

9.53kW 1% 1/8W surface mount

R3, R12, R24, R25

750W 5% 1/8W surface mount

R4, R5*

34.0W 1% 1/8W surface mount

R6

23.7W 1% 1/4W surface mount

R7

40.2kW 1% 1/8W surface mount

R8, R9, R26

200W 1% 1/8W surface mount

R10, R11

100W 1% 1/8W surface mount

R13, R14

100kW 10% 1/8W surface mount

R15–R20

49.9W 5% 1/8W surface mount

R21, R22

75W 5% 1/8W surface mount

R23

75W 1% 1/4W surface mount

C1, C3, C4,

0.1µF Ceramic Chip Cap

C8-12, C15

0.01µF Ceramic Chip Cap

C5, C6

10µF Tantalum Cap.

C7

10pF Cap

C2

Board layer Cap (2V rated)

C13, C14

22nF Cap

D1-D4

LED Diodes

Refer to ML2653 data sheet for CS2, CS1, and CS0 configuration

* These resistors need to be tuned to provide a 500mVP-P amplitude single ended signal to the ML6692 inputs.

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