Overview
The 74HC390D,652, manufactured by Nexperia USA Inc., is a dual 4-bit decade ripple counter integrated circuit. This device is part of the 74HC and 74HCT series, known for their high-speed CMOS logic. The 74HC390D is specifically designed for applications requiring multiple counting configurations within a single package. It features two divide-by-2 sections and two divide-by-5 sections, allowing for various counting modes such as BCD decade or bi-quinary configurations. The counters are triggered by the HIGH-to-LOW transition of the clock inputs and include asynchronous master reset inputs to clear the counters individually or simultaneously.
Key Specifications
| Type Number | VCC (V) | Output Drive Capability (mA) | Logic Switching Levels | tpd (ns) | fmax (MHz) | Power Dissipation Considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package Name |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 74HC390D | 2.0 - 6.0 | ± 5.2 | CMOS | 14 | 60 | Low | -40 to 125 | 77 | 2.5 | 35 | SO16 (SOT109-1) |
Key Features
- Dual 4-bit decade ripple counter with two divide-by-2 and two divide-by-5 sections.
- Asynchronous master reset inputs to clear each decade counter individually or simultaneously.
- Separate clocks (nCP0 and nCP1) for each section, allowing ripple counter or frequency division applications.
- Configurable for BCD decade or bi-quinary counting modes.
- Input levels compatible with CMOS logic (74HC390) or TTL logic (74HCT390).
- High noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B.
- Complies with JEDEC standard JESD7A.
Applications
The 74HC390D is versatile and can be used in a variety of applications, including:
- Frequency division and ripple counter circuits.
- BCD decade and bi-quinary counting systems.
- Automotive and industrial control systems.
- Consumer electronics and mobile devices.
- Computing and power management systems.
Q & A
- What is the 74HC390D,652? The 74HC390D,652 is a dual 4-bit decade ripple counter integrated circuit manufactured by Nexperia USA Inc.
- What are the main sections of the 74HC390D? The device has two divide-by-2 sections and two divide-by-5 sections.
- What are the logic switching levels for the 74HC390D? The logic switching levels are CMOS for the 74HC390 and TTL for the 74HCT390.
- What is the supply voltage range for the 74HC390D? The supply voltage range is from 2.0 V to 6.0 V.
- What is the maximum frequency for the 74HC390D? The maximum frequency is 60 MHz.
- What are the package options for the 74HC390D? The device is available in SO16 (SOT109-1) and TSSOP16 (SOT403-1) packages.
- Is the 74HC390D,652 still in production? No, the 74HC390D,652 is obsolete and no longer manufactured.
- What are some common applications for the 74HC390D? It is used in frequency division, BCD decade counting, automotive, industrial, and consumer electronics.
- Does the 74HC390D have any special reset features? Yes, it has asynchronous master reset inputs to clear each decade counter individually or simultaneously.
- Is the 74HC390D compliant with any specific standards? Yes, it complies with JEDEC standard JESD7A.
