Overview
The SN74LV4040APWR, produced by Texas Instruments, is a 12-bit asynchronous binary counter. This device features the outputs of all stages available externally, making it versatile for various digital circuit applications. It operates within a voltage range of 2V to 5.5V, supporting mixed-mode voltage operation on all ports. The counter is advanced on a high-to-low transition at the clock (CLK) input and can be asynchronously cleared by a high level at the clear (CLR) input.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage Range | -0.5 | 7 | V | |
| Operating Free-Air Temperature Range | -40 | 85 | °C | |
| Input Voltage Range | -0.5 | 7 | V | |
| Low-Level Output Current (IOL) at VCC = 3.3V | 6 | 12 | mA | |
| Input Transition Rise/Fall Time at VCC = 3.3V | 100 | ns | ||
| Maximum Clock Frequency at VCC = 3.3V, CL = 50 pF | 55 | 130 | MHz | |
| Propagation Delay Time (tPLH) at VCC = 3.3V, CL = 50 pF | 7.5 | 15.4 | 17.5 | ns |
Key Features
- Operates from 2V to 5.5V VCC.
- 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.
- Supports 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.
- Latch-up performance exceeds 100mA per JESD 78, class II.
Applications
The SN74LV4040APWR is suitable for a variety of digital circuit applications, including time-delay circuits, counter controls, and frequency-dividing circuits. Its ability to operate in partial-power-down mode makes it ideal for power-sensitive designs. The device's external availability of all counter stages enhances its versatility in complex digital systems.
Q & A
- What is the voltage range for the SN74LV4040APWR?
The SN74LV4040APWR operates from 2V to 5.5V VCC. - What is the maximum clock frequency at VCC = 3.3V?
The maximum clock frequency at VCC = 3.3V and CL = 50 pF is up to 130 MHz. - How does the counter advance?
The counter is advanced on a high-to-low transition at the clock (CLK) input. - How is the counter cleared?
The counter is asynchronously cleared by a high level at the clear (CLR) input. - What is the operating temperature range?
The operating free-air temperature range is -40°C to 85°C. - Does the device support partial-power-down mode?
Yes, the device supports partial-power-down mode operation through its Ioff circuitry. - What is the package type for the SN74LV4040APWR?
The SN74LV4040APWR is available in a TSSOP (PW) package with 16 pins. - What are some typical applications for this device?
Typical applications include time-delay circuits, counter controls, and frequency-dividing circuits. - What is the latch-up performance of the device?
The latch-up performance exceeds 100mA per JESD 78, class II. - Does the device support mixed-mode voltage operation?
Yes, the device supports mixed-mode voltage operation on all ports.
