DM54LS240中文资料Octal TRI-STATE® Buffers/Line Drivers/Line Receivers数据手册TI规格书

描述 Description

General Description
These buffers/line drivers are designed to improve both the performance and PC board density of TRI-STATE buffers drivers employed as memory-address drivers, clock drivers, and bus-oriented transmitters/receivers. Featuring 400 mV of hysteresis at each low current PNP data line input, they provide improved noise rejection and high fanout outputs and can be used to drive terminated lines down to 133X.

特性 Features

TRI-STATE outputs drive bus lines directly
PNP inputs reduce DC loading on bus lines
Hysteresis at data inputs improves noise margins
Typical IOL (sink current)
   54LS 12 mA
   74LS 24 mA
Typical IOH (source current)
   54LS b12 mA
   74LS b15 mA
Typical propagation delay times
   Inverting 10.5 ns
   Noninverting 12 ns
Typical enable/disable time 18 ns
Typical power dissipation (enabled)
   Inverting 130 mW
   Noninverting 135 mW