Multi-Channel PCIe 4.0 Linear Equalizer | NXP Semiconductors

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Multi-Channel PCIe Gen 4 Linear Equalizer

PTN3944 Active
  • This page contains information on a product that is no longer manufactured (discontinued). Specifications and information herein are available for historical reference only.

PTN3944 is a high-performance multi-channel (x4) linear equalizer that is optimized for PCIe 4.0, UPI and similar high-speed interfaces. PTN3944 addresses high-speed signal quality enhancement requirements for implementation of PCIe and UPI interfaces.

The device provides programmable linear equalization, output swing linearity control by pin strapping or I²C control to improve signal integrity and enable channel extension by reducing Inter-Symbol Interference (ISI). The equalizer supports use across a variety of channel conditions. PTN3944 supports entering into deep standby state using an I²C register write.

PTN3944 is powered from a 1.8 V supply. It is available in a small high performance HWFLGA36 package.

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Block Diagram

PTN3944 Block Diagram

PTN3944 Block Diagram
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Features

System Features

  • Supports PCIe Gen1 (2.5 Gbps) x4, Gen2 (5 Gbps) x4, Gen3 (8 Gbps) x4, and Gen4 (16 Gbps) x4
    • Peaking gain up to 18.3 dB at 8 GHz
    • Output swing linearity control: 500 mVppd to 950 mVppd
    • Flat gain of +0.7 dB or -0.7 dB
  • Configurable via I²C interface (supports 16 target addresses)
  • Supports maximum voltage limit (Vvoltage_jump) to align to the latest system platform capabilities
  • Integrated termination resistors provide impedance matching on both transmit and receive sides
  • RX equalizers on all high-speed channels to compensate for signal attenuation
  • Good linearity over the frequency band (DC to Nyquist frequency) and input voltage dynamic range
  • Differential input/output return loss performance < -15 dB up to 8 GHz
  • Flow-through pin-out to ease PCB layout and minimize crosstalk effects
    • Very low crosstalk: DDNEXT < -60 dB up to 8 GHz
    • Very low crosstalk: DDFEXT < -50 dB up to 8 GHz
  • Low active current consumption for output swing linearity control of 950 mVppd
    • Single channel: 62 mA (typ)
    • Two channels: 125 mA (typ)
    • Four channels: 250 mA (typ)
  • Power Supply 1.7 V to 1.9 V
  • Small high performance HWFLGA36 package
  • ESD HBM 1.5 kV, CDM 1 kV
  • Operating temperature range -20 °C to +85 °C
N true 0 PSPPTN3944en 3 Application Note Application Note t789 1 Data Sheet Data Sheet t520 1 Package Information Package Information t790 1 en_US en_US en Data Sheet Data Sheet 1 1 1.1 English PTN3944 is a high-performance multi-channel (x4) linear equalizer that is optimized for PCIe 4.0, UPI, and similar high-speed interfaces.PTN3944 addresses high-speed signal quality enhancement requirements for implementation of PCIe and UPI interfaces. 1624037306304701349112 PSP 585.6 KB None None documents None 1624037306304701349112 /docs/en/data-sheet/PTN3944.pdf 585629 /docs/en/data-sheet/PTN3944.pdf PTN3944 documents N N 2021-06-18 PTN3944, Multi-channel PCIe 4.0 linear equalizer – Data Sheet /docs/en/data-sheet/PTN3944.pdf /docs/en/data-sheet/PTN3944.pdf Data Sheet N 980000996212993340 2022-12-07 pdf N en Jun 18, 2021 980000996212993340 Data Sheet Y N PTN3944, Multi-channel PCIe 4.0 linear equalizer – Data Sheet Application Note Application Note 1 2 1.0 English This application note presents design guidelines for PTN38007/38003A/3816/3944 in a system. 1624305019319713027029 PSP 688.5 KB None None documents None 1624305019319713027029 /docs/en/application-note/AN13260.pdf 688518 /docs/en/application-note/AN13260.pdf AN13260 documents N N 2021-06-21 AN13260, PTN38007 / 38003A / 3816/ 3944 combo redriver design guidelines /docs/en/application-note/AN13260.pdf /docs/en/application-note/AN13260.pdf Application Note N 645036621402383989 2024-12-13 pdf N en Jun 21, 2021 645036621402383989 Application Note Y N AN13260, PTN38007 / 38003A / 3816/ 3944 combo redriver design guidelines Package Information Package Information 1 3 C English 1513943159616716009198 PSP 262.5 KB None None documents None 1513943159616716009198 /docs/en/package-information/SOT1948-1.pdf 262451 /docs/en/package-information/SOT1948-1.pdf sot1948-1 documents N N 2017-12-22 sot1948-1 /docs/en/package-information/SOT1948-1.pdf /docs/en/package-information/SOT1948-1.pdf Package Information N 302435339416912908 2022-12-07 pdf N en Nov 14, 2019 302435339416912908 Package Information Y N sot1948-1 false 0 PTN3944 downloads en true 1 Y PSP Y Y Application Note 1 /docs/en/application-note/AN13260.pdf 2021-06-21 1624305019319713027029 PSP 2 Jun 21, 2021 Application Note This application note presents design guidelines for PTN38007/38003A/3816/3944 in a system. None /docs/en/application-note/AN13260.pdf English documents 688518 None 645036621402383989 2024-12-13 N /docs/en/application-note/AN13260.pdf AN13260, PTN38007 / 38003A / 3816/ 3944 combo redriver design guidelines /docs/en/application-note/AN13260.pdf documents 645036621402383989 Application Note N en None Y pdf 1.0 N N AN13260, PTN38007 / 38003A / 3816/ 3944 combo redriver design guidelines 688.5 KB AN13260 N 1624305019319713027029 Data Sheet 1 /docs/en/data-sheet/PTN3944.pdf 2021-06-18 1624037306304701349112 PSP 1 Jun 18, 2021 Data Sheet PTN3944 is a high-performance multi-channel (x4) linear equalizer that is optimized for PCIe 4.0, UPI, and similar high-speed interfaces.PTN3944 addresses high-speed signal quality enhancement requirements for implementation of PCIe and UPI interfaces. None /docs/en/data-sheet/PTN3944.pdf English documents 585629 None 980000996212993340 2022-12-07 N /docs/en/data-sheet/PTN3944.pdf PTN3944, Multi-channel PCIe 4.0 linear equalizer – Data Sheet /docs/en/data-sheet/PTN3944.pdf documents 980000996212993340 Data Sheet N en None Y pdf 1.1 N N PTN3944, Multi-channel PCIe 4.0 linear equalizer – Data Sheet 585.6 KB PTN3944 N 1624037306304701349112 Package Information 1 /docs/en/package-information/SOT1948-1.pdf 2017-12-22 1513943159616716009198 PSP 3 Nov 14, 2019 Package Information None /docs/en/package-information/SOT1948-1.pdf English documents 262451 None 302435339416912908 2022-12-07 N /docs/en/package-information/SOT1948-1.pdf sot1948-1 /docs/en/package-information/SOT1948-1.pdf documents 302435339416912908 Package Information N en None Y pdf C N N sot1948-1 262.5 KB sot1948-1 N 1513943159616716009198 true Y Products

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