DS21FF44 Просмотр технического описания (PDF) - Maxim Integrated
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производитель
DS21FF44 Datasheet PDF : 117 Pages
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www.maxim-ic.com
FEATURES
§ 16 or 12 completely independent E1 framers
in one small 27mm x 27mm package
§ Each multichip module (MCM) contains
either four (FF) or three (FT) DS21Q44 die
§ Each quad framer can be concatenated into a
single 8.192MHz backplane data stream
§ IEEE 1149.1 JTAG-Boundary Scan
Architecture
§ DS21FF44 and DS21FT44 are pin
compatible with DS21FF42 and DS21FT42,
respectively, to allow the same footprint to
support T1 and E1 applications
§ 300-pin MCM BGA 1.27mm pitch package
(27mm x 27mm)
§ Low-power 3.3V CMOS with 5V tolerant
input and outputs
DS21FT44/DS21FF44
4 x 3 12-Channel E1 Framer
4 x 4 16-Channel E1 Framer
APPLICATIONS
§ DSLAMs
§ Multiplexers/Demultiplexers
§ Switches
§ High-Density Line Cards
ORDERING INFORMATION
PART
CHANNEL
PIN-PACKAGE
DS21FT44
12
300-BGA, 27mm x 27mm
DS21FT44N
12
300-BGA, 27mm x 27mm
DS21FF44
16
300-BGA, 27mm x 27mm
DS21FF44N
16
300-BGA, 27mm x 27mm
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
1. DESCRIPTION
The 4 x 4 and 4 x 3 MCMs offer a high-density packaging arrangement for the DS21Q44 E1 enhanced
quad framer. Either three (DS21FT44) or four (DS21FF44) silicon die of these devices is packaged in a
multichip module (MCM) with the electrical connections as shown in Figure 1-1.
All of the functions available on the DS21Q44 are also available in the MCM packaged version.
However, in order to minimize package size, some signals have been deleted or combined. These
differences are detailed in Table 1-1. In the 4 x 3 (FT) version, the fourth quad framer is not populated
and thus all the signals to and from this fourth framer are absent and should be treated as no connects
(NC). Table 2-1 lists all of the signals on the MCM and it also lists the absent signals for the 4 x 3.
The availability of both a 12-channel and a 16-channel version allow the maximum framer density with
the lowest cost.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: http://www.maxim-ic.com/errata.
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