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PI90LV024QE Datasheet(PDF) 1 Page - Pericom Semiconductor Corporation |
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PI90LV024QE Datasheet(HTML) 1 Page - Pericom Semiconductor Corporation |
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1 / 12 page  1 PS8486B 08/19/04 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 (325 MHz) • Operates from a 3.3V Supply: –40°C to 85°C • Low Voltage Differential Signaling with Output Voltages of ±350mV into: – 100Ω load (PI90LV024) – 50Ω load Bus LVDS Signaling (PI90LVB024) • 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 400Mbit/s of 250mW • Packaging (Pb-free & Green Available): – 28-pin QSOP (Q) – 28-pin TSSOP (L) Description The PI90LV024 and PI90LVB024 are monolithic dual 2x2 asynchronous crosspoint/repeater switches. The crosspoint func- tion 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 650 Mbps. TheLVDSstandardprovidesaminimumdifferentialoutputvoltage magnitudeof247mVintoa100Ωloadandreceiptof100mVsignals with up to 1V of ground potential difference between a transmitter and receiver. The PI90LVB024 doubles the output drive current to achieve Bus LVDS signaling levels with a 50Ω load. The intended application of these devices is for loop-through and redundant channel switching for both point-to-point base-band (PI90LV024) and multipoint (PI90LVB024) data transmissions over controlled impedance media. The package pin assignments enables easy routing for applications requiring signal feedback. Block Diagram Pin Configuration PI90LV024, PI90LVB024 LVDS Dual 2x2 Crosspoint/Repeater Switch 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VCC 1Y 1Z 2DE 2Z 2Y GND 4B 4A S3 3DE S2 3A 3B 1B 1A S0 1DE S1 2A 2B GND 4Y 4Z 4DE 3Z 3Y VCC 1DE/2DE 1Y/1Z 2Y/2Z 4A/4B 3A/3B S2/S3 S0/S1 1A/1B 2A/2B 4Y/4Z 3Y/3Z 3DE/4DE |
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