pSemi 4270-52

The PE4270 is a high-isolation switch designed for CATV applications, covering a broad frequency range from 1 to 3000 MHz. This single-supply SPST switch offers a single-pin CMOS control interface with industry leading CTB performance. It also provides low insertion loss, high isolation and extremely low bias requirements while operating on a single 3-volt supply. In a typical CATV application, the PE4270 provides for a cost effective and manufacturable solution vs. mechanical relays. The PE4270 is manufactured on Peregrine’s UltraCMOS™ process, a patented variation of silicon-on-insulator (SOI) technology on a sapphire substrate, offering the performance of GaAs with the economy and integration of conventional CMOS. The PE4270 high isolation SPST CATV switch is designed to support CATV applications such as premise disconnect of a CATV signal path. This function is typically performed by bulky and expensive mechanical relays. The high isolation characteristics, high compression point, and integrated 75-ohm terminations make the PE4270 an ideal, cost effective and manufacturable product of choice. The control logic input pin (CTRL) is typically driven by a 3-volt CMOS logic level signal, and has a threshold of 50% of VDD. For flexibility to support systems that have 5-volt control logic drivers, the control logic input has been designed to handle a 5-volt logic HIGH signal.

• Integrated 0.25 watt terminations
• CTB performance of 90 dBc
• High isolation: 90 dB at 5 MHz, 63 dB at 1000 MHz
• Low insertion loss: 0.5 dB at 50 MHz, 0.70 dB at 1000 MHz
• High input IP2: >80 dBm
• CMOS/TTL single-pin control
• Single +3-volt supply operation
• Extremely low bias: 8 μA @ 3 V
• Available in a 6-lead DFN package

• CATV applications such as premise disconnect of a CATV signal path