1 Features

1• 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 V OD: 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

3 Description

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.