描述 Description

The PI90LV044 and PI90LVB044 are monolithic dual 2x2 asynchronous crosspoint/repeater switches. The crosspoint function is based on a multiplexer tree architecture. Each 2x2 switch can be considered as a pair of 2:1 multiplexers that share the same inputs. The signal path through each switch is fully differential with minimal propagation delay. The signal path is unregistered, so no clock is required for the data inputs. The signal line drivers and receivers use Low Voltage Differential Signaling (LVDS) to achieve signaling rates as high as 650Mbps.

特性 Features

? Dual 2x2 Crosspoint/Repeater Switch

? Meets or Exceeds the Requirements of ANSI TIA/EIA-644-1995

? Designed for Signaling Rates up to 650 Mbit/s (325Mhz)

? Operates from a single 3.3V Supply: –40°C to 85°C

? Low-Voltage Differential Signaling with Output Voltages of ±350mV into:

- 100? load (PI90LV044)

- 50? load Bus LVDS Signaling (PI90LVB044)

? Accepts ±350mV differential inputs

? Wide common mode input range: 0.2V to 2.7V

? Output drivers are high impedance when disabled or when VCC ≤ 1.5V

? Inputs are open, short, and terminated fail safe

? Propagation Delay Time: 3.5ns

? ESD protection is 10kV on bus pins

? Bus Pins are High Impedance when disabled or with VCC less than 1.5V

? TTL Inputs are 5V Tolerant

? Power Dissipation at 400 Mbit/s of 250mW

? Packaging (Pb-free & Green available):

- 28-pin QSOP (Q)

- 28-pin TSSOP (L)