Overview
The 74HC390PW,118 is a dual 4-bit decade ripple counter produced by Nexperia USA Inc. This integrated circuit is part of the 74HC series and is designed to provide flexible counting configurations. The device is divided into four separately clocked sections, each consisting of two divide-by-2 and two divide-by-5 sections. This allows for various counting configurations such as BCD decade or bi-quinary decade operations. The counters are triggered by the HIGH-to-LOW transition of the clock inputs and feature asynchronous master reset inputs to clear each decade counter individually.
Key Specifications
| Parameter | Value |
|---|---|
| Type Number | 74HC390PW |
| Package | TSSOP16 (SOT403-1) |
| Supply Voltage (VCC) | 2.0 - 6.0 V |
| Output Drive Capability | ± 5.2 mA |
| Logic Switching Levels | CMOS |
| Propagation Delay (tpd) | 14 ns |
| Maximum Frequency (fmax) | 60 MHz |
| Operating Temperature (Tamb) | -40°C to 125°C |
| Mounting Type | Surface Mount |
| Trigger Type | Negative Edge |
| Reset Type | Asynchronous |
Key Features
- Dual 4-bit decade ripple counter with two divide-by-2 and two divide-by-5 sections.
- Separately clocked sections allow for ripple counter or frequency division applications.
- Asynchronous master reset inputs to clear each decade counter individually.
- High noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B.
- Complies with JEDEC standard JESD7A.
- Reduced input threshold levels for interfacing with TTL logic levels.
- Clamp diodes on inputs enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.
Applications
The 74HC390PW,118 is versatile and can be used in a variety of applications across different industries, including:
- Automotive systems: For counting and frequency division in automotive electronics.
- Industrial control systems: For timing and counting functions in industrial automation.
- Consumer electronics: In devices requiring precise counting and timing, such as clocks and timers.
- Computing and telecommunications: For frequency division and counting in digital circuits.
Q & A
- What is the 74HC390PW,118?
The 74HC390PW,118 is a dual 4-bit decade ripple counter integrated circuit produced by Nexperia USA Inc. - What are the key features of the 74HC390PW,118?
It includes separately clocked sections, asynchronous master reset inputs, high noise immunity, and compliance with JEDEC standard JESD7A. - What are the supply voltage and operating temperature ranges for the 74HC390PW,118?
The supply voltage range is 2.0 - 6.0 V, and the operating temperature range is -40°C to 125°C. - How is the counter triggered?
The counter is triggered by the HIGH-to-LOW transition of the clock inputs. - What types of counting configurations are possible with this device?
It can be configured for BCD decade or bi-quinary decade operations. - What is the maximum frequency of operation for the 74HC390PW,118?
The maximum frequency of operation is 60 MHz. - Is the 74HC390PW,118 RoHS compliant?
Yes, the 74HC390PW,118 is RoHS compliant. - What package type is the 74HC390PW,118 available in?
The device is available in a TSSOP16 (SOT403-1) package. - What are some common applications for the 74HC390PW,118?
It is used in automotive, industrial, consumer electronics, computing, and telecommunications applications. - How does the asynchronous master reset function work?
The asynchronous master reset inputs allow for clearing each decade counter individually by setting the four outputs LOW when a HIGH signal is applied to the nMR input.
