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DS125MB203

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12.5-Gbps dual port mux and fanout buffer

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Data sheet

DS125MB203

ACTIVE
Data sheet Order now

Product details

Type Mux Buffer Number of channels 4 Input compatibility AC-coupling Speed (max) (Gbpp) 12.5 Protocols CPRI, Fibre Channel, General purpose, Infiniband, Interlaken, OBSAI, PCIe1, PCIe2, PCIe3, SAS/SATA, sRIO Operating temperature range (°C) -40 to 85
Type Mux Buffer Number of channels 4 Input compatibility AC-coupling Speed (max) (Gbpp) 12.5 Protocols CPRI, Fibre Channel, General purpose, Infiniband, Interlaken, OBSAI, PCIe1, PCIe2, PCIe3, SAS/SATA, sRIO Operating temperature range (°C) -40 to 85
WQFN (NJY) 54 55 mm² 10 x 5.5
  • 12.5-Gbps Dual Lane 2:1 Mux, 1:2 Switch or
    Fanout
  • Low 390-mW Total Power (Typical)
  • Advanced Signal Conditioning Features:
    • Receive Equalization up to 30 dB at 6.25 GHz
    • Transmit De-Emphasis up to –12 dB
    • Transmit Output-Voltage Control: 600 mV to
      1300 mV
  • Programmable Through Pin Selection, EEPROM
    or SMBus Interface
  • Selectable 2.5-V or 3.3-V Supply Voltage
  • –40°C to +85°C Operating Temperature Range
  • 12.5-Gbps Dual Lane 2:1 Mux, 1:2 Switch or
    Fanout
  • Low 390-mW Total Power (Typical)
  • Advanced Signal Conditioning Features:
    • Receive Equalization up to 30 dB at 6.25 GHz
    • Transmit De-Emphasis up to –12 dB
    • Transmit Output-Voltage Control: 600 mV to
      1300 mV
  • Programmable Through Pin Selection, EEPROM
    or SMBus Interface
  • Selectable 2.5-V or 3.3-V Supply Voltage
  • –40°C to +85°C Operating Temperature Range

The DS125MB203 device is a dual port 2:1 multiplexer and 1:2 switch or fan-out buffer with signal conditioning suitable for 10GE, 10G-KR (802.3ap), Fibre Channel, PCIe, Infiniband, SATA3/SAS2 and other high-speed bus applications with data rates up to 12.5 Gbps. The continuous time linear equalizer (CTLE) of the receiver provides necessary boost to compensate up to 30-inch FR-4 or 8-m cable (AWG-24) at 12.5 Gbps. This on-chip feature eliminates the need for external signal conditioners. The transmitter features a programmable amplitude voltage levels to be selectable from 600 mVp-p to 1300 mVp-p and de-emphasis of up to 12 dB.

The DS125MB203 can be configured to support PCIe, SAS/SATA, 10G-KR or other signaling protocols. When operating in 10G-KR and PCIe Gen-3 mode, the DS125MB203 transparently allows the host controller and the end point to optimize the full link and negotiate transmit equalizer coefficients. This seamless management of the link training protocol ensures system level interoperability with minimum latency.

The programmable settings can be applied through pin settings, SMBus (I2C) protocol or loaded directly from an external EEPROM. When operating in the EEPROM mode, the configuration information is automatically loaded on power up, which eliminates the need for an external microprocessor or software driver.

The DS125MB203 device is a dual port 2:1 multiplexer and 1:2 switch or fan-out buffer with signal conditioning suitable for 10GE, 10G-KR (802.3ap), Fibre Channel, PCIe, Infiniband, SATA3/SAS2 and other high-speed bus applications with data rates up to 12.5 Gbps. The continuous time linear equalizer (CTLE) of the receiver provides necessary boost to compensate up to 30-inch FR-4 or 8-m cable (AWG-24) at 12.5 Gbps. This on-chip feature eliminates the need for external signal conditioners. The transmitter features a programmable amplitude voltage levels to be selectable from 600 mVp-p to 1300 mVp-p and de-emphasis of up to 12 dB.

The DS125MB203 can be configured to support PCIe, SAS/SATA, 10G-KR or other signaling protocols. When operating in 10G-KR and PCIe Gen-3 mode, the DS125MB203 transparently allows the host controller and the end point to optimize the full link and negotiate transmit equalizer coefficients. This seamless management of the link training protocol ensures system level interoperability with minimum latency.

The programmable settings can be applied through pin settings, SMBus (I2C) protocol or loaded directly from an external EEPROM. When operating in the EEPROM mode, the configuration information is automatically loaded on power up, which eliminates the need for an external microprocessor or software driver.
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Technical documentation

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Type Title Date
* Data sheet DS125MB203 Low-Power 12.5-Gbps Dual-Lane 2:1/1:2 Mux/Buffer With Equalization and De-Emphasis datasheet (Rev. C) PDF | HTML 31 Dec 2015
Application note Extend reach with Ethernet Redrivers and Retimers for 10G-12.5G Applications (Rev. A) 31 Jan 2023
Application note Understanding EEPROM Programming for High Speed Repeaters and Mux Buffers 09 Oct 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Support software

SIGCONARCHITECT — SigCon Architect v2.0.0.8

Supported products & hardware

Supported products & hardware

Products
PCIe, SAS & SATA ICs
DS125BR111 — 12.5-Gbps 2-channel redrivers with input equalization DS125BR401 — 2.5/5.0/8.0-Gbps 4-lane PCI Express redriver with equalization & De-Emp DS125BR401A — 12-Gbps 4-lane redriver with equalization DS125BR800A — 12.5-Gbps 8-channel redriver with input CTLE and output De-Emphasis DS125BR820 — 12-Gbps 8-channel linear redriver with equalization DS160PR412 — PCIe® 4.0, 16-Gbps, 4-channel linear redrivers with integrated 1:2 demux DS160PR421 — PCIe® 4.0 16-Gbps 4-channel linear redrivers with integrated 2:1 mux DS160PR810 — PCIe® 4.0, 16 Gbps, 8-channel linear redriver DS160PR822 — PCIe® 4.0 16-Gbps 8-channel linear redriver with four 2x2 crosspoint mux DS160PT801 — PCIe® 4.0 16-Gbps 8-Lane (16-Channel) retimer DS160UP822 — UPI 2.0 16-Gbps 8-channel linear redriver with four 2x2 crosspoint mux DS320PR810 — PCIe® 5.0, 32-Gbps, 8-channel linear redriver DS320PR822 — PCIe® 5.0, 32-Gbps, 8-channel linear redriver with four 2x2 crosspoint multiplexers DS80PCI102 — 2.5/5.0/8.0-Gbps 1-lane PCI Express redriver with equalization and De-Emphasis DS80PCI800 — 2.5/5.0/8.0-Gbps 8-channel PCI Express redriver with equalization & De-Emphasis DS80PCI810 — 2.5/5.0/8.0-Gbps 8-channel linear redriver with equalization SN75LVPE3410 — PCIe® 3.0 8-Gbps 4-Channel Linear Redriver TMUXHS4412 — 4-Channel 20-Gbps differential 2:1/1:2 mux/demux
Ethernet retimers, redrivers & mux-buffers
DS100BR111 — 10.3-Gbps ultra low power 2-ch redriver with input equalization and output de-emphasis DS100BR111A — 10.3-Gbps ultra low power 2-channel redriver with input equalization DS100BR210 — 10.3-Gbps low power 2-ch redriver w/ input equalization and output de-emphasis DS100KR800 — 10.3-Gbps 8 channel (uni-directional) redriver with EQ and DE DS125BR800 — 2.5/5.0/8.0-Gbps 8-ch PCIe redriver with de-emphasis DS125MB203 — 12.5-Gbps dual port mux and fanout buffer DS64BR111 — 6.4-Gbps ultra low power 2-channel redriver with input equalization and output de-emphasis
Serial digital interface (SDI) ICs
LMH0318 — 3G HD/SD SDI reclocker with integrated cable driver LMH1218 — 12G SDI cable driver with integrated reclocker
Hardware development
GUI for evaluation module (EVM)
SIGCONARCHITECT — SigCon Architect utility tool
Evaluation board
DS100BR111EVK — DS100BR111EVK Evaluation Module DS100BR210EVK — DS100BR210EVK Evaluation Module DS100DF410EVK — DS100DF410EVK evaluation board DS100KR800EVK — DS100KR800EVK evaluation board DS110DF111EVM — DS110DF111EVM: 8.5-11.3 Gbps Retimer Evaluation Module DS110DF410EVM — DS110DF410EVM: 8.5 to 11.3 Gbps Quad Channel Retimer with Adaptive EQ, CDR and DFE Evaluation Module DS125BR111EVM — DS125BR111EVM 12 Gbps 2-Channel Repeater with Equalization Evaluation Module DS125BR401AEVM — DS125BR401AEVM: 12-Gbps 4-Lane Repeater With Equalization Evaluation Module DS125BR820EVM — DS125BR820EVM: 12.5 Gbps 8-Channel Repeater with Equalization Evaluation Module DS125DF111EVM — DS125DF111EVM: 9.8-12.5 Gbps Retimer Evaluation Module DS125DF410EVM — DS125DF410EVM: 9.8 to 12.5 Gbps Quad Channel Retimer with Adaptive EQ, CDR and DFE Evaluation Module DS80PCI102EVK — DS80PCI102 SMA Evaluation Kit DS80PCI800EVK — DS80PCI800EVK Evaluation Module DS80PCI810EVM — DS80PCI810 Evaluation Module LMH1218EVM — LMH1218 Evaluation Module USB2ANY — USB2ANY interface adapter
Interface adapter
DPS-DONGLE-EVM — Interface adapter board for repeaters, retimers & SDI products evaluation module
Download
Support software

SIGCONARCHITECT-WRTE — SigCon Architect With RTE v2.0.0.8

Supported products & hardware

Supported products & hardware

Products
PCIe, SAS & SATA ICs
DS125BR111 — 12.5-Gbps 2-channel redrivers with input equalization DS125BR401 — 2.5/5.0/8.0-Gbps 4-lane PCI Express redriver with equalization & De-Emp DS125BR401A — 12-Gbps 4-lane redriver with equalization DS125BR800A — 12.5-Gbps 8-channel redriver with input CTLE and output De-Emphasis DS125BR820 — 12-Gbps 8-channel linear redriver with equalization DS160PR412 — PCIe® 4.0, 16-Gbps, 4-channel linear redrivers with integrated 1:2 demux DS160PR421 — PCIe® 4.0 16-Gbps 4-channel linear redrivers with integrated 2:1 mux DS160PR810 — PCIe® 4.0, 16 Gbps, 8-channel linear redriver DS160PR822 — PCIe® 4.0 16-Gbps 8-channel linear redriver with four 2x2 crosspoint mux DS160PT801 — PCIe® 4.0 16-Gbps 8-Lane (16-Channel) retimer DS160UP822 — UPI 2.0 16-Gbps 8-channel linear redriver with four 2x2 crosspoint mux DS320PR810 — PCIe® 5.0, 32-Gbps, 8-channel linear redriver DS320PR822 — PCIe® 5.0, 32-Gbps, 8-channel linear redriver with four 2x2 crosspoint multiplexers DS80PCI102 — 2.5/5.0/8.0-Gbps 1-lane PCI Express redriver with equalization and De-Emphasis DS80PCI800 — 2.5/5.0/8.0-Gbps 8-channel PCI Express redriver with equalization & De-Emphasis DS80PCI810 — 2.5/5.0/8.0-Gbps 8-channel linear redriver with equalization SN75LVPE3410 — PCIe® 3.0 8-Gbps 4-Channel Linear Redriver TMUXHS4412 — 4-Channel 20-Gbps differential 2:1/1:2 mux/demux
Ethernet retimers, redrivers & mux-buffers
DS100BR111 — 10.3-Gbps ultra low power 2-ch redriver with input equalization and output de-emphasis DS100BR111A — 10.3-Gbps ultra low power 2-channel redriver with input equalization DS100BR210 — 10.3-Gbps low power 2-ch redriver w/ input equalization and output de-emphasis DS100KR800 — 10.3-Gbps 8 channel (uni-directional) redriver with EQ and DE DS125BR800 — 2.5/5.0/8.0-Gbps 8-ch PCIe redriver with de-emphasis DS125MB203 — 12.5-Gbps dual port mux and fanout buffer DS64BR111 — 6.4-Gbps ultra low power 2-channel redriver with input equalization and output de-emphasis
Serial digital interface (SDI) ICs
LMH0318 — 3G HD/SD SDI reclocker with integrated cable driver LMH1218 — 12G SDI cable driver with integrated reclocker
Hardware development
GUI for evaluation module (EVM)
SIGCONARCHITECT — SigCon Architect utility tool
Evaluation board
DS100BR111EVK — DS100BR111EVK Evaluation Module DS100BR210EVK — DS100BR210EVK Evaluation Module DS100DF410EVK — DS100DF410EVK evaluation board DS100KR800EVK — DS100KR800EVK evaluation board DS110DF410EVM — DS110DF410EVM: 8.5 to 11.3 Gbps Quad Channel Retimer with Adaptive EQ, CDR and DFE Evaluation Module DS125BR111EVM — DS125BR111EVM 12 Gbps 2-Channel Repeater with Equalization Evaluation Module DS125BR401AEVM — DS125BR401AEVM: 12-Gbps 4-Lane Repeater With Equalization Evaluation Module DS125BR820EVM — DS125BR820EVM: 12.5 Gbps 8-Channel Repeater with Equalization Evaluation Module DS125DF410EVM — DS125DF410EVM: 9.8 to 12.5 Gbps Quad Channel Retimer with Adaptive EQ, CDR and DFE Evaluation Module DS250DF810EVM — 25 Gbps multi-rate 8-channel retimer evaluation module DS280BR820EVM — DS280BR820 28 Gbps 8-channel linear repeater evaluation module DS280MB810EVM — DS280MB810 28 Gbps 8-Channel Linear Repeater With Crosspoint Evaluation Module DS80PCI102EVK — DS80PCI102 SMA Evaluation Kit DS80PCI800EVK — DS80PCI800EVK Evaluation Module DS80PCI810EVM — DS80PCI810 Evaluation Module LMH1218EVM — LMH1218 Evaluation Module
Interface adapter
DPS-DONGLE-EVM — Interface adapter board for repeaters, retimers & SDI products evaluation module
Download
Simulation model

DS125MB203 IBIS-AMI Model

SLNM011.ZIP (6348 KB) - IBIS-AMI Model
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