Overview
The MC74HC161ADG is a programmable 4-bit binary counter produced by onsemi. It is part of the HC161A series, which features asynchronous reset. This device is designed to be compatible with standard CMOS outputs and can also interface with LSTTL outputs when used with pull-up resistors. The MC74HC161ADG operates within a voltage range of 2.0 to 6.0 V, making it versatile for various applications. It is packaged in a SOIC-16 (Pb-Free) format, ensuring compliance with environmental regulations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VCC) | 2.0 to 6.0 | V |
| DC Input Voltage (VI) | -0.5 to VCC + 0.5 | V |
| DC Output Voltage (VO) | -0.5 to VCC + 0.5 | V |
| Maximum Clock Frequency (fmax) | 6 to 35 | MHz |
| Maximum Propagation Delay, Clock to Q | 16 to 120 | ns |
| Input Current (II) | ±1.0 | μA |
| Output Drive Capability | 10 LSTTL Loads | |
| Thermal Resistance (JA) | 112 | °C/W |
| Power Dissipation in Still Air at 85°C | 500 | mW |
| Moisture Sensitivity Level | 1 | |
| ESD Withstand Voltage (Human Body Model) | 2000 | V |
Key Features
- Programmable 4-bit binary counter with asynchronous reset (MC74HC161A) or synchronous reset (MC74HC163A)
- Parallel Load capability
- Synchronous or asynchronous Reset
- Carry Output for cascading counters
- Count-enable controls through Enable P and Enable T pins
- Output Drive Capability: 10 LSTTL Loads
- Outputs directly interface to CMOS, NMOS, and TTL
- Low Input Current: 1.0 μA
- High Noise Immunity characteristic of CMOS devices
- In compliance with JEDEC Standard No. 7A
- Pb-Free package
Applications
The MC74HC161ADG is suitable for a variety of applications requiring programmable binary counting, including:
- Digital counters and timers
- Frequency dividers
- Sequential logic circuits
- Cascaded counter configurations for higher bit counts
- General-purpose digital systems where binary counting is necessary
Q & A
- What is the operating voltage range of the MC74HC161ADG?
The operating voltage range is from 2.0 to 6.0 V.
- What type of reset does the MC74HC161ADG have?
The MC74HC161ADG has an asynchronous reset.
- How many LSTTL loads can the outputs of the MC74HC161ADG drive?
The outputs can drive up to 10 LSTTL loads.
- What is the maximum clock frequency for the MC74HC161ADG?
The maximum clock frequency ranges from 6 to 35 MHz depending on the supply voltage.
- Is the MC74HC161ADG Pb-Free?
- What is the thermal resistance of the SOIC-16 package?
The thermal resistance (JA) is 112 °C/W.
- Can the MC74HC161ADG be cascaded with other counters?
- What is the maximum propagation delay from Clock to Q?
The maximum propagation delay from Clock to Q ranges from 16 to 120 ns depending on the supply voltage.
- What is the input current specification for the MC74HC161ADG?
The input current is ±1.0 μA.
- What is the ESD withstand voltage for the MC74HC161ADG?
The ESD withstand voltage is 2000 V according to the Human Body Model.
