AL211 Allayer Communications, AL211 Datasheet - Page 6

• Manufacturer Part Number: AL211
• Description: Fast Ethernet Fiber to TP Media Converter
• Manufacturer: Allayer Communications

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NUMBER
PIN
39
40
41
42
43
44
45
46
47
48
GND_PLL
TP_PECL
Vcc_PLL
NAME
GNDA
RLED
Rbias
VccA
Xout
PIN
Xin
PD
Table 1: AL211 Pin Description (Continued)
Reference Only / Allayer Confidential
I/O
O
P
P
P
P
I
I
I
I
I
Transmit Output LED Drive Control. Tied to ground through a
12.8K 1% resistor. When this pin is tied high, it will disable
the current mode output driver and enable the voltage mode
driver.
Bias Control of the AL211. Tied to ground through a 12.8K
1% resistor.
Phase Locked Loop Ground.
25 MHz Crystal Connection. This pin also sources the clock
output.
25 MHz Crystal Connection. If a clock is used instead of a
crystal, this is the input pin of the clock.
Phase Locked Loop Power Supply.
Power Down. Active high, internal pull down.
Analog Ground.
Analog Power.
TP Port PECL Interface Enable. When set to high, the TPI+,
TPI-, and TPO+, TPO- pins become PECL level interface. It
also disables the MLT3 encoder/decoder. When the PECL
level interface is used, the signals expected by the chip are
NRZI instead of MLT3. Internal pull down.
DESCRIPTION
6