Product category:
Communications ICs (Wired)
News Release from: Micrel | Subject: SY55854U, SY55858U and SY55859L
Edited by the Electronicstalk Editorial
Team on 16 May 2002
Low jitter puts crosspoint switch trio
in Sonet
Three new high-performance CML crosspoint switches from Micrel meet OC-192, Sonet/SDH jitter requirements.
Three new high-performance CML crosspoint switches from Micrel meet OC-192, Sonet/SDH jitter requirements The 3Gbit/s SY55854U is a single 2x2 CML crosspoint switch in a tiny 16-pin QSOP (4 x 5mm) package
This article was originally published on Electronicstalk on 5 Dec 2000 at 8.00am (UK)
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For redundant switchover and fault tolerant applications, Micrel offers the SY55858U and SY55859L dual 2x2 CML crosspoint switches in 32-pin TQFP and 32-pin MLF packages, respectively.
The 3Gbit/s SY55858U is the first dual 2x2 crosspoint to include a flexible, 3-pin input stage.
Access to the centre-point of the input termination resistors allows a simple interface to DC-coupled or AC-coupled CML and LVPECL input signals without the need for level shifting resistor networks in the signal path.
Differential CML outputs are optimised for 50ohm environments and include internal 50ohm source termination resistors.
Jitter performance is extremely low-random jitter (RJ) is typically 2ps RMS, and deterministic jitter (DJ) is typically 5ps peak-peak, making it an ideal choice for Sonet/SDH applications from OC3 through OC192.
For applications that require a pin-for-pin, plug-compatible alternative to the Maxim MAX3840 dual 2x2 CML crosspoint switch, Micrel offers the SY55859L.
Like the MAX3840, the 3.3V SY55859L operates up to 2.7Gbit/s and consumes less than 627mW over temperature with all outputs enabled.
The Micrel SY55859L features a superior output stage that provides greater drive and swing.
The result is a reduced bit error rate (BER) with a wider, more open eye pattern.
The 16-pin QSOP SY55854U single 2x2 crosspoint switch is guaranteed over the industrial temperature range (-40 to +85C).
Pricing starts at $13.85 when the device is purchased in a quantity of 1000.
Pricing for the SY55858U and SY55859L dual 2x2 crosspoint switches starts at $17.11 when purchased in a quantity of 1000.
Samples are available now, and production quantity leadtime is stock to 4 weeks (ARO).
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