ML6652CH Micro Linear, ML6652CH Datasheet - Page 12

• Manufacturer Part Number: ML6652CH
• Description: 10/100Mbps Ethernet Fiber and Copper Media Converter with Auto Negotiation
• Manufacturer: Micro Linear

12
Pin No. Signal Name
LED STATUS (CONTINUED)
MANAGEMENT INTERFACE
REFERENCE CLOCK
POWER AND GROUND
44
16
17
18
12
15
20
28
34
35
19
23
26
31
PIN DESCRIPTIONS (continued)
2
9
FOANDT
GNDFC
VCCFC
REFCLK
GNDQ
GNDD
GNDB
VCCQ
MDIO
GNDT
GNDE
GNDL
VCCD
VCCE
VCCL
MDC
I/O
O
Preliminary Datasheet
Description
When FOINSPD is in the high impedance state, no 10 or 100Mbps signal at
FOINP/FOINN, the FOANDT LED pulls low while receiving Auto-Negotiation
signal at the FOINP/FOINN interface. When FOINSPD is not in the high
impedance state, the FOANDT pin pulls low to indicate that a data packet is
being detected at the FOINP/FOINN interface. When a data packet is
indicated, the pulse width at FOANDT is stretched to a minimum of 1.3 to
2.7ms to improve visibility. This low current LED driver interface requires a
10K pull-up resistor and a small CMOS buffer as shown in Figure 3. In any
other case this pin is in high impedance state.
Management data TTL compatible input/output pin. Connect to ground if
unused
Management clock TTL input. The maximum frequency can be 12.5MHz
instead of the 2.5MHz limit of IEEE 802.3. Connect to ground if unused
25MHz Reference Clock CMOS input. This clock is used for internal digital
logic, and as a reference for the PLLs.
Ground for the twisted pair driver output stage.
Ground for the equalizer, one PLL and part of the descrambler and twisted pair
driver.
Ground for CMOS noisy circuits.
Ground for the fiber optic LED driver output stage.
Ground for one PLL, part of the scrambler, fiber optic LED driver, and
quantizer.
Ground for the quantizer and central bias.
Ground for part of the central biasing.
Power supply for the equalizer, one PLL and part of the descrambler and
twisted pair driver.
Power supply for CMOS noisy circuits.
Power supply for the fiber optic LED driver output stage.
Power supply for one PLL, part of the scrambler, fiber optic LED driver, and
quantizer.
Power supply for the quantizer and central bias.
FOAN_DT
CMOS Buffer, Fairchild NC7WZ16 or Equivalent,
Buffer VCC=VCCD, Buffer Ground = DGND
44
VCCD
Figure 3.
10K
VCCD
January 2002
560
FOAN_DT
LED
ML6652