描述 Description

This family of 4, 8, and 16 differential line drivers implements the electrical characteristics of low-voltage differential signaling (LVDS). This signaling technique lowers the output voltage levels of 5-V differential standard levels (such as EIA/TIA-422B) to reduce the power, increase the switching speeds, and allow operation with a 3.3-V supply rail. Any of the 16 current-mode drivers will deliver a minimum differential output voltage magnitude of 247 mV into a 100-Ω load when enabled.When disabled, the driver outputs are high-impedance. Each driver input (A) and enable (EN) have an internal pulldown that will drive the input to a low level when open-circuited. The SN65LVDS387, SN65LVDS389, and SN65LVDS391 devices are characterized for operation from –40°C to 85°C. The SN75LVDS387, SN75LVDS389, and SN75LVDS391 devices are characterized for operation from 0°C to 70°C.

特性 Features

? Four (’391), Eight (’389), or Sixteen (’387) Line Drivers Meet or Exceed the Requirements of ANSI EIA/TIA-644 Standard
? Designed for Signaling Rates Up to 630?Mbps With Very Low Radiation (EMI)
? Low-Voltage Differential Signaling With Typical Output Voltage of 350 mV and a 100-Ω Load
? Propagation Delay Times Less Than 2.9 ns
? Output Skew Is Less Than 150 ps
? Part-to-Part Skew Is Less Than 1.5 ns
? 35-mW Total Power Dissipation in Each Driver Operating at 200 MHz
? Driver Is High-Impedance When Disabled or With VCC 15 kV
? Packaged in Thin Shrink Small-Outline Package With 20-mil Pin Pitch
? Low-Voltage TTL (LVTTL) Logic Inputs Are 5-V Tolerant