DS125DF111SQ UART Interface IC Signal Buffers, Repeaters Low Pwr Multi-Rate Two CH Retimer

1 Features

• Pin Compatible Retimer Family

• – DS110DF111 with DFE: 8.5 - 11.3 Gbps

• – DS125DF111 with DFE: 9.8 - 12.5 Gbps

• Adaptive CTLE: 33 dB Max Boost at 6.25 GHz

• Self Tuning 5-Tap DFE

• Raw Equalized and Retimed Data Loopback

• Adjustable Transmit VOD: 600 to 1300 mVp-p

• Settable Tx De-Emphasis Driver 0 to –12dB

• Low Power Consumption: 220 mW/Channel

• Locks to Half/Quarter/Eighth Data Rates for Legacy Support

• On-Chip Eye Monitor (EOM), PRBS Generator

• Input Signal Detection, CDR Lock Detection/Indicator

• Single 3.3-V or 2.5-V Power Supply

• SMBus, EEPROM, or Pin Based Configuration

• 4-mm x 4-mm, 24-Pin WQFN Package

• Operating Temp Range: –40°C to 85°C

2 Applications

• Front Port Optical Interconnects

• SFF-8431

• 10G/1G Ethernet

• CPRI

The DS125DF111 is a dual channel (1-lane bidirectional) retimer with integrated signal conditioning. The DS125DF111 includes an input Continuous-Time Linear Equalizer (CTLE), clock and data recovery (CDR) and transmit driver on each channel.

The DS125DF111 with its on-chip Decision Feedback Equalizer (DFE) can enhance the reach and robustness of long, lossy, cross-talk-impaired high speed serial links to achieve BER < 1x10–15. For less demanding applications/interconnects, the DFE can be switched off and achieve the same BER performance. The DS125DF111 and DS110DF111 devices are pin-compatible.

Each channel of the DS125DF111 independently locks to specific serial data at data rates from 9.8 to 12.5 Gbps or to any supported sub-rate of these data rates. This simplifies system design and lowers overall cost.

Programmable transmit de-emphasis driver offers precise settings to meet the SFF-8431 output eye template. The fully adaptive receive equalization (CTLE and DFE) enables longer distance transmission in lossy copper interconnect and backplanes with multiple connectors. The CDR function is ideal for use in front port parallel optical module applications to reset the jitter budget and retime high speed serial data.

Device Information