The HXR42400 Transimpedance and Limiting Amplifier array for LR4 parallel optical applications supports data rates up to 28Gbps and optical reach above +10km. Together with a four-channel photo diode array or discrete detectors, high-capacity, high-availability optical links can be designed for long reach telecom or datacom applications. The 3.3V SiGe device integrates the transimpedance preamplifier, the limiting post-amplifier, and a versatile CML output stage for four optical channels. Available in die form.


  • 40uApp receiver sensitivity for 10-12 BER at 28Gbps
  • Greater than 2.4mApp overload
  • 150mW per channel power consumption with low power setting
  • Automatic Gain and Threshold Controls
  • Adjustable output swing size and pre-emphasis mode
  • Signal Detect Programmable threshold with SQUELCH function
  • Independent RSSI, Temperature monitor
  • Optimized for isolated and common cathode photo-detector arrays from multiple vendors
  • Control lines accessible on both sides of chip
  • QSFP MSA compliance

tuneProduct Options

Part Number Part Status Pkg. Type Temp. Grade Carrier Type Buy Sample
Obsolete WAFER C WFP
Obsolete BOARD C Box


Title language Type Format File Size Date
PDN# : CQ-20-07 End-of-Life (EOL) Process on Select Part Numbers Product Discontinuation Notice PDF 717 KB
star HXR42400 Product Brief Product Brief PDF 259 KB
Optical Interconnect Overview Overview PDF 216 KB