SN74LV4040BMPWREP中文资料德州仪器数据手册PDF规格书

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.