AMIS-49587_15 Datasheet, PDF (7/56 Pages) ON Semiconductor – Power Line Carrier Modem

AMIS−49587
Table 7. AMIS−49587 QFN PIN FUNCTION DESCRIPTION
Pin
No.
Pin Name
I/O
Type
Description
37
TX_ENB
Out D, 5V Safe TX enable bar (open drain)
42
TX_OUT
Out
A
Transmitter output
43
ALC_IN
In
A
Automatic level control input
46
VDDA
P
3.3 V analog supply
47
VSSA
P
Analog ground
48
RX_OUT
Out
A
Output of receiver low noise operational amplifier
49
RX_IN
In
A
Positive input of receiver low noise operational amplifier
51
REF_OUT
Out
A
Reference output for stabilization
2, 3, ..
NC
50, 52
Pins 2, 3, 4, 5, 12, 13, 14, 15, 19,23, 25, 26, 27, 28, 30, 34, 38, 39, 40,
42, 44, 45, 50, 52 are not connected. These pins need to be left open or
connected to the GND plane
P:
Power pin
A:
Analog pin
D:
Digital pin
5V Safe: IO that support the presence of 5 V on bus line
Out:
Output signal
In:
Input signal
3.3 Detailed Pin Description
VDDA
VDDA is the positive analog supply pin. Nominal voltage is 3.3 V. A ceramic decoupling capacitor C_DA = 100 nF $10% must
be placed between this pin and the VSSA. Connection path of this capacitance to the VSSA on the PCB should be kept as short
as possible in order to minimize the serial resistance.
REF_OUT
REF_OUT is the analog output pin which provides the voltage reference used by the A/D converter. This pin must be decoupled
to the analog ground by a 1 mF $10 percent ceramic capacitance C_DREF. The connection path of this capacitor to the VSSA
on the PCB should be kept as short as possible in order to minimize the serial resistance.
VSSA
VSSA is the analog ground supply pin.
VDD
VDD is the 3.3 V digital supply pin. A ceramic decoupling capacitor C_DD = 100 nF $10% must be placed between this pin
and the VSS. Connection path of this capacitance to the VSS on the PCB should be kept as short as possible in order to minimize
the serial resistance.
VSS
VSS is the digital ground supply pin.
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