Micrel launches low-power limiting post amp for SFPs 

JUNE 25, 2007 -- Micrel Inc. (search for Micrel) today launched the SY88973BL, a low-power limiting post amplifier designed for use in fiber-optic receivers. Specifically, it is ideal for 1.25- and 2.5-Gigabit Ethernet (GbE); 1.062-Mbit/sec and 2.125-Gbit/sec Fibre Channel; Gigabit interface converter (GBIC); small form factor (SFF) and small form factor pluggable (SFP) transceivers; parallel 10-GbE; high-gain line drivers; and line receivers in both the telecom/datacom and optical transceiver markets.Â
 
"Micrel's post amplifier family has received wide customer acceptance in part because the entire line offers universally interchangeable parts," reports Thomas S. Wong, vice president of high-bandwidth products at Micrel. "Like the rest of the post amp family, our new device is also easy to use in a wide variety of applications and data rates and meets the industry's most stringent jitter requirements."
 
The SY88973BL incorporates a loss-of-signal (LOS), open-collector TTL output with an external 4.75k Ω to 10k Ω pull-up resistor. According to the company, this IC offers multi-rate capability from 622 Mbits/sec up to 3.2 Gbits/sec operation. It also features internal 50 Ω data input and low-noise 50 Ω CML data output, say company representatives. The SY88973BL has chatter-free OC-TTL LOS output with programmable LOS sensitivity using a single external resistor. 

Available in a 3- x 3-mm 16-pin MLF package, the device operates from a single +3.3V ±10% power supply, over an industrial temperature range of â��40 ° C to +85 ° C. 

The SY88973BL is currently available in volume quantities and is priced at $3.31 in quantities of 1,000. A free evaluation board also is available.

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