The DM4124 is an ultra-high-speed, 4-to-1 multiplexer that provides high performance and is easy to use for implementing static or dynamic four-to-one multiplexing of LVSCFL-like signals with an aggregate data rate up to 12.5 Gb/s. Its wide operating frequency range makes it useful in many situations for the interfacing of low-speed devices to high-speed devices. Both static switch and dynamic 4:1 multiplexer operating modes are supported. The DM4124 is fabricated using HBT InP technology and it has been designed using an ECL topology to ensure high-speed operation. DM4124 has 50 ohm resistor terminations on data inputs (A, B,C,D - DC coupled) and a wide spread of allowable differential voltage levels [0.4V to 1.6V] so to guarantee full compatibility with 3.3VLVSCFL devices. All control signal (S1,S2,Clk) are DC or AC coupled, LVSCFL(ViH=3.3V ViL=2.85V), with internal 50 ohm resistors to Vcc. The output of the DM4124 is DC coupled with 450-mVpp single-ended amplitude LVSCFL (VoH=3.3V VoL=2.75V). The four to one core mux is followed by an internal DFF so to improve jitter performances. The high-performance output buffer provides an excellent eye diagram up to 12.5 Gb/s NRZ output.
The DM4124 uses one single power supply (3.3V) while power consumption is lower than 0.4W

• Data Input (A,B,C,D)LVSCFL
• Common Mode Range [0V,0.4V]
• Differential PP range [0.4V,1.6V]
• 50 ohm to GND internal resistor
• DC Coupling Control Inputs (S1,S2,Clk)
• LVSCFL levels:
• sensitivity >200 mV
• VH Typical 3.3V
• VL Typical 2.85V
• 50 ohm to GND internal resistors AC or DC coupling allowed
• Data rate range: 20 NRZ (12.5 RZ) Gb/s
• Output Range: DC to 12.5 Gb/s
• 450 mVpp typical single-ended output
• Output rise time (20% - 80%): <24 ps
• Output fall time (20% - 80%): <24 ps
• Power consumption: lower than 350 mW
• Power Supply Vee=-3.3V
• Available in Die or plastic QFN 5mmx5mm 32Le

Please download datasheet or our product review (Acrobat Reader needed).

Application Notes