PSB2163T-V31TR Infineon Technologies, PSB2163T-V31TR Datasheet - Page 172

• Manufacturer Part Number: PSB2163T-V31TR
• Description: IC AUDIO RINGING CODEC 28-PDSO
• Manufacturer: Infineon Technologies
• Series: ARCOFI®r

Specifications of PSB2163T-V31TR

• Function: CODEC Filter
• Interface: IOM-2, PCI, Serial
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 900µA
• Power (watts): 1mW
• Operating Temperature: -25°C ~ 80°C
• Mounting Type: Surface Mount
• Package / Case: DSO-28
• Includes: Activation and Deactivation, B-Channel and D-Channel HDLC Controllers, D-Channel Priority Handler, Monitor Channel Handler
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Other names: PSB2163T-V31INTR; PSB2163T-V31TR

2
Since the ARCOFI-SP will be used with different kinds of printed circuit boards in
different applications and environments, it is not possible to show the "optimum layout".
Instead, this chapter explains the correlations that lead to the optimum layout for a given
application.
Power Supply Pins
The PSB 2163 has three ground pins and two pins for connecting the positive supply
voltage. Internally all the ground pins and all the power supply pins are connected. From
table 1 it can be seen, what parts of the ARCOFI-SP are supplied from what pins. It is
important, that each pair of pins given in one row of table 1 is decoupled with a pair of
capacitors in parallel. One capacitor has to be a 47 nF … 100 nF ceramic one, for the
second one a tantalum type with 1 F … 10 F is recommended.
Table 1
Power Supply Pins of the PSB 2163
Pin for
1 (
15 (
20 (
Note, that pin 21 (
analog part of the ARCOFI-SP except the power amplifiers AHO and ALS.
Ground Plane
A second aspect in designing a perfect PCB layout is a low impedance connection
between all points of the circuitry that have to be connected to ground. First of all, this
concerns the three ground pins of the ARCOFI-SP (pin 1, 15, 20). These three pins have
to be connected to each other directly underneath the IC package. This ensures not only
a low impedance ground for the PSB 2163 but also serves as a shield, if the connection
between the three ground pins is realized as a ground plane. Shielding is important since
it protects the high gain analog amplifiers and the converters against any capacitive
coupling. Hence, if multilayer PCBs are used, the ground plane has to be the top layer
and not somewhere in between.
Figure 1 shows one possibility to place the decoupling capacitors on a two layer board
if no components are allowed on the bottom of the PCB. If mounting on both sides is
permitted, one would place the capacitors between pin 1 and 21 on the bottom layer.
Semiconductor Group
V
V
V
SSD
SSP
SSA
)
V
)
)
Layout Considerations
SS
Pin for
21 (
13 (
21 (
V
DD
V
V
V
DD
DDP
DD
) is used for both, the supply of the DSP and the supply of the
)
)
V
)
DD
(+ 5 V) Supply for
Digital signal processor and digital interface
Analog output amplifier AHO, ALS
Analog preamplifiers and switches
Layout and Wiring Recommendations
171