Microchip Technology

The SY84782U is a single 2.5V supply, ultra-low power, small form factor laser diode driver for telecom/datacom applications. Intended to drive FP/DFB lasers at data rates up to 1.25Gbps, it is especially useful for Compact SFP, SFP and SFF modules where power requirements are quite stringent. The driver can deliver modulation current up to 90mA and offers a high compliance voltage, all of which make the SY84782U suitable for high current operations in both AC and DC coupled applications. The SY84782U is intended to be used with Micrel’s MIC3003 Optical Transceiver Management IC, which allows for both modulation and bias current control and monitoring. Furthermore, the MIC3003 offers power control and temperature compensation. This device operates across the industrial temperature range (–40°C to +95°C) and is available in a small 3mm x 3mm QFN package.

The SY87701AL is a complete Clock Recovery and Data Retiming integrated circuit for data rates from 28Mbps up to 1.3Gbps NRZ. The device is ideally suited for SONET/SDH/ATM and Fibre Channel applications and other high-speed data transmission systems. Clock recovery and data retiming is performed by synchronizing the on-chip VCO directly to the incoming data stream. The VCO center frequency is controlled by the reference clock frequency and the selected divide ratio. On-chip clock generation is performed through the use of a frequency multiplier PLL with a byte rate source as reference. The SY87701AL also includes a link fault detection circuit.

The SY87729L is a complete rate independent frequency synthesizer integrated circuit. From a single reference source, this device generates a differential PECL reference frequency for Micrel's SY87721L 10Mbps to 2.7Gbps combined CDR and CMU.The SY87729L generates an exactly correct reference frequency for common data transport protocols. This is especially important in transponder applications, where a standards compliant protocol data unit must be generated downstream, even in the absence of any signal from the associated upstream interface.In addition, SY87729L will generate exactly correct reference frequencies for common data transport protocols augmented by forward error correction codes.For proprietary applications, the SY87729L generates reference frequencies guaranteed to enable the SY87721L CDR to lock to any possible baud rate in its range. SY87729L accepts configuration via a MicroWire™ interface.

The SY88022AL is a single 3.3V supply, small form factor, multirate laser driver for telecom/datacom applications using FP/DFB lasers at data rates up to 11.3125Gbps. The driver can deliver a modulation current up to 75mA into 15Ω external load with fast edge rate below 25ps, and a bias current up to 80mA. An equalizer at the input will compensate for SFP+ connector and line card long traces. The SY88022AL interfaces with Micrel’s highly advanced optical module controller MIC3003 as an easy-to-use chipset solution for SFP+ optical module application. The MIC3003 allows for many features including modulation and bias current control, automatic power control, and temperature compensation using look up tables. The MIC3003 comes in 4mm × 4mm QFN (MIC3003GML) and 3mm × 3mm QFN (MIC3003GFL) packages. The SY88022AL operates on a single 3.3V power supply and comes in a 3mm × 3mm QFN package.