DS21FF44 Maxim Integrated Products, DS21FF44 Datasheet - Page 117
DS21FF44
Manufacturer Part Number
DS21FF44
Description
IC FRAMER E1 4X4 16CH 300-BGA
Manufacturer
Maxim Integrated Products
Datasheet
1.DS21FT44N.pdf
(117 pages)
Specifications of DS21FF44
Controller Type
E1 Framer
Interface
Parallel/Serial
Voltage - Supply
2.97 V ~ 3.63 V
Current - Supply
300mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
300-BGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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DS21FT44/DS21FF44
POWER SUPPLY DECOUPLING
In a typical PCB layout for the MCM, all of the VDD pins will connect to a common power plane and all
the VSS lines will connect to a common ground plane. The recommended method for decoupling is
shown below in both schematic and pictorial form. As shown in the pictorial, the capacitors should be
symmetrically located about the device. Figure 24-1 uses standard capacitors, two .47 uf ceramics and
two .01uf ceramics. Since VDD and VSS signals will typically pass vertically to the power and ground
planes of a PCB, the decoupling caps must be placed as close to the DS21Fx4y as possible and routed
vertically to power and ground planes.
Figure 24-1. DECOUPLING SCHEME USING STANDARD TANTALUM CAPS
VDD
VDD
.47
.47
DS21Fx4y
DS21Fx4y
.01
.01
.47
.01
.47
.01
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