SN74LV4040BEP中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

1 Features

? 2V to 5.5V VCC Operation

? Typical VOLP (Output Ground Bounce) <0.8V at

VCC = 3.3V, TA = 25°C

? Typical VOHV (Output VOH Undershoot) 2.3V at

VCC = 3.3V, TA = 25°C

? Support Mixed-Mode Voltage Operation on All

Ports

? High On-Off Output-Voltage Ratio

? Low Crosstalk Between Switches

? Individual Switch Controls

? Extremely Low Input Current

? Ioff Supports Partial-Power-Down Mode Operation

? Operating ambient temperature: -55°C to +125°C

? Supports defense and aerospace applications:

– Controlled baseline

– One assembly and test site

– One fabrication site

– Extended product life cycle

– Product traceability

2 Applications

? Clock division

? Binary counting

3 Description

The SN74LV4040B-EP is a 12-bit asynchronous

binary counters with the outputs of all stages available

externally. A high level at the clear (CLR) input

asynchronously clears the counter and resets all

outputs low. The count is advanced on a high-tolow

transition at the clock (CLK) input. Applications

include time-delay circuits, counter controls, and

frequency-dividing circuits.

The SN74LV4040B-EP is fully specified for partialpower-

down applications using Ioff. The Ioff circuitry

disables the outputs, preventing damaging current

backflow through the devices when powered down.