Overview
The MC74HC390ADR2G, produced by Onsemi, is a dual 4-stage binary ripple counter integrated circuit. It is part of the 74HC series and is known for its high-performance silicon-gate CMOS technology. This device is identical in pinout to the LS390 and consists of two independent 4-bit counters, each composed of a divide-by-two and a divide-by-five section. The counters have separate clock inputs and can be cascaded to implement various combinations of divide-by-2 and/or divide-by-5 up to a divide-by-100 counter. The device is compatible with standard CMOS outputs and, with pullup resistors, can also be compatible with LSTTL outputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Count Rate | 50 MHz | |
| Logic Type | Counter, Decade | |
| Mounting Type | Surface Mount | |
| Number of Bits per Element | 4 | |
| Number of Elements | 2 | |
| Operating Temperature | -55°C to 125°C | |
| Package | 16-SOIC (0.154", 3.90mm Width) | |
| Reset | Asynchronous | |
| Trigger Type | Negative Edge | |
| Voltage | 2 V to 6 V | |
| Output Drive Capability | 10 LSTTL Loads | |
| Input Current | 1 μA | |
| Supply Current | Up to 160 μA (depending on VCC and temperature) |
Key Features
- Outputs directly interface to CMOS, NMOS, and TTL.
- Operating voltage range: 2.0 to 6.0 V.
- Low input current: 1 μA.
- High noise immunity characteristic of CMOS devices.
- In compliance with the requirements defined by JEDEC Standard No 7A.
- Chip complexity: 244 FETs or 61 equivalent gates.
- AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements.
- Pb-free, halogen-free/BFR-free, and RoHS compliant.
Applications
The MC74HC390ADR2G is versatile and can be used in a variety of applications, including:
- Frequency division and counting in digital circuits.
- Cascaded counter configurations for higher division ratios.
- Automotive systems due to its AEC-Q100 qualification.
- Industrial control systems requiring high noise immunity.
- Consumer electronics where low power consumption and compatibility with various logic families are essential.
Q & A
- What is the count rate of the MC74HC390ADR2G?
The count rate of the MC74HC390ADR2G is up to 50 MHz. - What is the operating voltage range of the MC74HC390ADR2G?
The operating voltage range is from 2.0 to 6.0 V. - What type of reset does the MC74HC390ADR2G have?
The MC74HC390ADR2G has an asynchronous reset. - Is the MC74HC390ADR2G compatible with LSTTL outputs?
Yes, with pullup resistors, the device inputs are compatible with LSTTL outputs. - What is the package type of the MC74HC390ADR2G?
The package type is 16-SOIC (0.154", 3.90mm Width). - Is the MC74HC390ADR2G RoHS compliant?
Yes, the device is Pb-free, halogen-free/BFR-free, and RoHS compliant. - What is the trigger type of the MC74HC390ADR2G counters?
The trigger type is negative edge. - Can the MC74HC390ADR2G be used in automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable. - What is the maximum supply current of the MC74HC390ADR2G?
The maximum supply current can be up to 160 μA depending on VCC and temperature. - How many bits per element does the MC74HC390ADR2G have?
Each element has 4 bits.
