SY55859LMI Micrel Inc, SY55859LMI Datasheet - Page 8
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SY55859LMI
Manufacturer Part Number
SY55859LMI
Description
IC CROSSPOINT SWITCH DUAL 32MLF
Manufacturer
Micrel Inc
Series
SY55r
Datasheet
1.SY55859LMG.pdf
(12 pages)
Specifications of SY55859LMI
Function
Crosspoint Switch
Circuit
2 x 2:2
Voltage Supply Source
Single Supply
Voltage - Supply, Single/dual (±)
3 V ~ 3.6 V
Current - Supply
160mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-MLF®, QFN
Array Configuration
2x2
Differential Data Transmission
Yes
Power Supply Requirement
Single
Operating Supply Voltage (typ)
3.3V
Pin Count
32
Mounting
Surface Mount
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Cascading Capability
No
Line Code
NRZ
On-chip Buffers
Yes
On-chip Decoder
No
On-chip Latch Circuit
No
On-chip Mux/demux
No
Programmable
No
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
Dual Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Dual Supply Voltage (min)
Not RequiredV
Output Level
CML
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SY55859LMI
Manufacturer:
MICREL
Quantity:
481
Functional Characteristics
SY55859L is a dual cross point with excellent pin-to-pin
and part-to-part skew matching. As shown in table 1,
based on the logic value at TTL input SELA0, output
QA0 replicates either input DA0 or DA1. TTL input
SELA1 selects whether output QA1 replicates input DA0
or DA1. As shown in table 2, TTL inputs SELB0 and
SELB1 perform similarly for outputs QB0 and QB1
respectively, choosing between inputs DB0 or DB1.
If the two control inputs are tied together, SY55859L
behaves as a redundant distribution device. Depending
on the state of the combined control inputs, QA0 and
QA1 will both replicate either DA0 or DA1. If the two
Micrel, Inc.
January 2010
SELA0
SELA0
CTL
CTL
CTL
CTL
0
0
1
1
0
0
1
1
SELA1
SELA1
/CTL
/CTL
CTL
CTL
0
1
0
1
0
1
0
1
Table 1. Input to Output Connectivity, Crosspoint A
Table 2. Input to Output Connectivity, Crosspoint B
Opposite
Opposite
Same
Same
QA0
QA0
DA0
DA0
DA1
DA1
DA0
DA0
DA1
DA1
8
control inputs are made the logical complement of each
other, the SY55859L functions as a crosspoint, either
sending DA0 to QA0 and DA1 to QA1, or sending DA0
to QA1 and DA1 to QA0. The same applies to channel
B.
SY85859L’s CML outputs are source terminated to 50
individually, 100
parallel terminated, also to 50 . This improves signal
integrity. With all terminations on chip, high-speed
interfacing is greatly simplified, eliminating the need for
external termination passive components. Figures 1 and
2 show the input and output structures.
Opposite
Opposite
Same
Same
QA1
QA1
DA0
DA1
DA0
DA1
DA0
DA1
DA0
DA1
hbwhelp@micrel.com
differentially. The CML inputs are
Redundant Distribution
Redundant Distribution
or (408) 955-1690
Fanout Buffer
Fanout Buffer
Fanout Buffer
Fanout Buffer
M9999-012110-A
Dual Buffer
Dual Buffer
Dual Buffer
Dual Buffer
Crosspoint
Crosspoint
Function
Function
SY55859L