SN74LS240NE4中文资料德州仪器数据手册PDF规格书

1 Features

1• Inputs Tolerant Down to 2 V, Compatible With

3.3-V or 2.5-V Logic Inputs

• Maximum tpd of 15 ns at 5 V

• 3-State Outputs Drive Bus Lines or Buffer Memory

Address Registers

• PNP Inputs Reduce DC Loading

• Hysteresis at Inputs Improves Noise Margins

2 Applications

• Servers

• LED Displays

• Network Switches

• Telecom Infrastructure

• Motor Drivers

• I/O Expanders

3 Description

The SNx4LS24x, SNx4S24x octal buffers and line

drivers are designed specifically to improve both the

performance and density of three-state memory

address drivers, clock drivers, and bus-oriented

receivers and transmitters. The designer has a choice

of selected combinations of inverting and noninverting

outputs, symmetrical, active-low outputcontrol

(G) inputs, and complementary output-control

(G and G) inputs. These devices feature high fan-out,

improved fan-in, and 400-mV noise margin. The

SN74LS24x and SN74S24x devices can be used to

drive terminated lines down to 133 Ω.