Multi-Channel PCIe Gen 4 Linear Equalizer
PTN3944 Receive alerts
- Not Recommended for New Designs
- 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
-
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
Part numbers include: PTN3944EW.
