SuperSpeed USB 3.0 Redriver
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Multi-Channel PCIe Gen 4 Linear Equalizer
- This page contains information on a product that is not recommended for new designs.
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.
PTN3944 Chip Shot
Product Details
Features
System Features
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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
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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
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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
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