PI3L720 (Not Recommended for New Design (NRND))

Product Description

The PI3L720 is a 8-Channel 2:1 multiplexer/demultiplexer LAN Switch with Hi-Z outputs. Industry leading advantages include a propagation delay of less than 250ps, resulting from its low channel resistance and I/O capacitance. The device multiplexes differential outputs from a Gigabit Ethernet transceiver (PHY) device to one of two corresponding B or C outputs. The switch is bidirectional and offers little or no attenuation of the high-speed signals at the outputs. It is designed for low bit-to-bit skew, high channel-tochannel noise isolation and is compatible with various standards, such as 10/100/1000 Base-T (Ethernet). The PI3L720 provides a Power Down input (PD), which can put the device into standby mode (PD=1) while mobile, eliminating an external power switch. Generally, this part can be used to replace mechanical relays in low-voltage LAN applications that interface a physical layer over CAT 5 or CAT 6 unshielded twisted pair cable through an isolation transformer.

Features

• 1:2 Gigabit LAN Switch
• Power-down support
• Low bit-to-bit skew: 200ps
• Very Low Crosstalk: –75dB @ 250MHz
• Status Indicator LEDs Switched with Ethernet pairs
• V_DD Operating Range: +3.0V to +3.6V
• Enhanced ESD Protection (on A, B, C, LED pins):
• 8kV (contact)(1
• 1.0kV (machine model), 11kV (human body model)
• >650 MHz bandwidth
• Packaging:
• 56-contact TQFN (5 x 11mm, 0.5 pitch)
• 42-contact TQFN (3.5 x 9mm, 0.5 pitch)
• 42-contact TQFN (3.5 x 7mm, 0.4 pitch)

Applications

• Dual Physical Layer Device sharing to one interface connector, or one controller to dual connectors for docking
• Routes signals for 10/100/1000 Mbit Ethernet