AMCC introduces OC-192 chipset, SiGe OC-768 transimpedance amplifier

March 12, 2001
Mar. 12, 2001--Applied Micro Circuits Corp. announced their S3097 transmitter and S3098 receiver with clock and data recovery (CDR) and post-amplifier chipset. AMCC also announced the S76800, what the company claims to be the industry's first commercially available silicon germanium (SiGe) OC-768 transimpedance amplifier (TIA).

Applied Micro Circuits Corp. (AMCC) (NASDAQ:AMCC), a provider of high-bandwidth silicon connectivity solutions for optical networks, announced S3097 transmitter and S3098 receiver with clock and data recovery (CDR) and post-amplifier chipset.

The S3097 and S3098 silicon germanium (SiGe) OC-192 devices build upon the advanced features of AMCC's S3091/S3092 transmitter/receiver chipset, which has been shipping in high volume since Q3 2000. The S3097 and S3098 second-generation solutions offer customers a combination of low jitter generation and power with a highly-integrated post-amplifier. Designed for SONET/SDH and proposed 10 Gigabit Ethernet applications, the S3097 and S3098 can be used in either 200 MSA or 300 MSA-based transponders/optical modules and operate at OC-192 with Forward Error Correction (FEC).

The S3097 provides jitter generation for greater jitter link budget headroom and performs all SONET/SDH serialization transmission. The S3098 performs all SONET/SDH deserialization and the threshold adjustment capability of the S3098's post-amplifier features duty cycle distortion correction, which enables customers to simplify their design time. The inclusion of on-chip bias resistors for the LVDS interface further reduces power and design time.

The S3097 and S3098 chipset is designed to seamlessly migrate from the S3091/S3092 to interface with AMCC's OC-192 Indus, Ganges and Hudson framers and the S3090 and S3095 transimpedance amplifiers. Each device has been engineered to be compliant with the OIF 1999.102 standard, and incorporates a low-jitter 16-bit LVDS interface, enabling guaranteed compliance with the bit-error rate requirements of Bellcore and ITU-T industry standards.

The system timing circuitry of both chips is designed with AMCC's high-frequency Phase Locked Loop (PLL) technology, consisting of a phase/frequency detector (PFD), a loop filter, and a voltage controlled oscillator (VCO). The S3097's VCO can operate from rates as low as 9.953 Gbps to as high as 10.709 Gbps. The on-chip clock synthesis PLL components contained in the S3097 multiplexer allow for the use of a slower external transmit clock reference. Incorporating a FIFO (First In, First Out) to decouple the internal and external transmit clocks, the S3098 receives an OC-192 scrambled NRZ serial signal and recovers the clock, which is then used to re-time and demultiplex the data into 16 parallel lines. If a loss-of-signal condition occurs, the internal PLL will lock to the local 155.52 MHz reference clock to provide a stable clock for downstream purposes. In addition, the S3098's limiting post-amplifier on the serial input enables small signal gain.

Samples of both devices are currently available to development partners with volume production scheduled for June. The S3097 and S3098 are each packaged in a 148-pin CBGA. The complete chipset is priced at $199 when purchased in 100,000 chipset quantities.

In addition, AMCC also announced the S76800, what the company claims to be the industry's first commercially available silicon germanium (SiGe) OC-768 transimpedance amplifier (TIA).

The high-performance TIA is ideally suited for use in short reach, intermediate reach and long reach OC-768 SONET-based fiber optic data link applications. Utilizing an advanced SiGe process to successfully handle data rates up to 48 Gbps, the TIA can accept return to zero (RZ) and non-return to zero (NRZ) data streams for enhanced performance. The device's 45 GHz of bandwidth allows customers to buy a complete module for the OC-768 application range, without having to purchase a PIN-diode and optically amplify the data signal. The S76800 is the first in a series of 40 Gbps devices to be offered by AMCC, and future 40 Gbps solutions, such as the OC-768 modulator driver Mux/DeMux devices and framer, will also be available this year.

The S76800 provides high-speed amplification of current received by an external photodetector for use in SONET OC-768 fiber optic receivers operating up to 48 Gbps. Engineered with a single power supply, the TIA features a transimpedance gain of 220-Ohms and a 50-Ohm single-ended output for more efficient clock and data recovery. The S76800 offers a low power dissipation of only 0.6W.

The S76800 has a very high input overload specification of up to 3 mA, while being fully linear over the entire input dynamic range. The TIA features low input noise of 4 (mu) rms, which allows sensitivity down to 50 microamps to be detected with a bit error rate (BER) of 1E-10. The RMS output DC voltage is measured by a signal strength indicator, which provides the basis for an automatic gain control loop utilizing an EDFA at the photodiode input. For added flexibility, the device can interface with a PIN photodiode using ribbon bonding or flip chip technology. It operates from a single -5.2V supply.

Samples of the S76800 are currently available with production release scheduled for June (die only).

About AMCC:

AMCC designs, develops, manufactures, and markets high-performance, high-bandwidth silicon solutions for optical networks. For more information, visit www.amcc.com.