1 Features
1• Pin-Compatible Retimer Family
– DS110DF111 With DFE: 8.5 to 11.3 Gbps
– DS125DF111 With DFE: 9.8 to 12.5 Gbps
• Adaptive CTLE Up to 34 dB Boost at 5.65 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 –12 dB less•
Low Power Consumption: 200 mW/Channel
• Locks to Half, Quarter, and 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 ±5% Power Supply
• SMBus, EEPROM, or Pin-Based Configuration
• 4.0-mm × 4.0-mm, 24-Pin QFN Package
• Operating Temp Range: –40°C to 85°C

2 Applications
• Front Port Optical Interconnects
• SFF-8431
• 10G/1G Ethernet
• CPRI

3 Description
The DS110DF111 is a dual-channel (1-lane
bidirectional) retimer with integrated signal conditioning. The DS110DF111 includes an input
Continuous-Time Linear Equalizer (CTLE), clock and
data recovery (CDR), and transmit driver on each
channel.
The DS110DF111 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 and 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 DS110DF111 independently locks to serial data at data rates from 8.5 to 11.3
Gbps or to any supported subrate 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.