sy55859l Micrel Semiconductor, sy55859l Datasheet - Page 8

• Manufacturer Part Number: sy55859l
• Description: Sy55859l 3.3v, 2.7gbps Dual 2x2 Crosspoint Switch
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
ENA1, ENB0 ENB1, SELA0, SELA1, SELB0 and SELB1.
These high impedance inputs do not default to a stable
logic state when left unconnected. Therefore, these TTL
compliant inputs cannot be left floating. Connect these inputs
to a valid control signal, or hardwire to V
corresponding output stage. This reduces power
consumption. Disabled output stages do not go into a high
impedance state. Rather, each pin of a disabled output
stage pair goes high through its respective 50
termination.
M9999-110705
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APPLICATIONS INFORMATION
RELATED PRODUCT AND SUPPORT DOCUMENTATION
The eight TTL compliant inputs to SY55859L are ENA0,
The four enable TTL inputs, when driven low, disable the
Part Number
SY55854U
SY55858U
Function
2x2 CML Crosspoint
Dual 2x2 CML Crosspoint
CC
or GND.
source
8
the corresponding effect on the CML output is not defined
in the tables of this data sheet. This delay is 3ns typical,
and 10ns maximum. Please note that, for cases where highly
capacitive lines are being driven, the RC effects of the line
may make this delay longer.
corresponding CML output is also not defined in the tables.
It is 300psec typical, 500psec maximum.
techniques, filter V
short. Use multiple vias where possible. Also, use controlled
impedance transmission lines to interface with the SY55859L
data inputs and outputs.
The delay from a logic transition on an enable input to
The delay from a logic transition on a select input to the
For best performance, use good high frequency layout
Data Sheet Link
www.micrel.com/product-info/products/sy55854u.shtml
www.micrel.com/product-info/products/sy55858u.shtml
CC
supplies, and keep ground connections
SuperLite™
SY55859L