Overview
The MC74HC161ADTR2G is a programmable 4-bit binary counter produced by onsemi. It belongs to the HC161A series, which is known for its high-performance silicon-gate CMOS technology. This device is identical in pinout to the LS161 and is compatible with standard CMOS outputs and LSTTL outputs with pull-up resistors. The MC74HC161A features asynchronous reset, making it versatile for various digital circuit applications.
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 (IIK) | -20 | mA |
| Output Sink Current (IO) | -25 | mA |
| Storage Temperature Range (TSTG) | -65 to 150 | °C |
| Lead Temperature (TL) | 260 | °C |
| Thermal Resistance (JA) | 112 to 148 | °C/W |
| Power Dissipation (PD) | 450 to 500 | mW |
Key Features
- Programmable 4-bit binary counter with asynchronous reset.
- High-performance silicon-gate CMOS technology.
- Operating voltage range: 2.0 to 6.0 V.
- Low input current: 1.0 µA.
- Output drive capability: 10 LSTTL loads.
- Outputs directly interface with CMOS, NMOS, and TTL.
- Parallel load capability.
- Synchronous or asynchronous reset options.
- Carry output for cascading.
- Count-enable controls.
Applications
The MC74HC161ADTR2G is suitable for a variety of digital circuit applications, including:
- Counters in digital systems.
- Timing and sequencing circuits.
- Frequency dividers.
- Modulo counters (e.g., modulo-5, modulo-11 counters).
- General-purpose digital logic circuits.
Q & A
- What is the operating voltage range of the MC74HC161ADTR2G?
The operating voltage range is 2.0 to 6.0 V. - What type of reset does the MC74HC161ADTR2G have?
The MC74HC161ADTR2G has an asynchronous reset. - What is the maximum clock frequency of the MC74HC161ADTR2G?
The maximum clock frequency ranges from 6 to 35 MHz depending on the voltage. - Can the MC74HC161ADTR2G be used with LSTTL outputs?
Yes, with pull-up resistors, it is compatible with LSTTL outputs. - What is the thermal resistance of the TSSOP package?
The thermal resistance (JA) for the TSSOP package is 112 to 148 °C/W. - What is the storage temperature range for the MC74HC161ADTR2G?
The storage temperature range is -65 to 150 °C. - How many LSTTL loads can the outputs drive?
The outputs can drive up to 10 LSTTL loads. - What is the purpose of the carry output in the MC74HC161ADTR2G?
The carry output is used for cascading counters. - Can the MC74HC161ADTR2G be used in modulo counters?
Yes, it can be used to design counters of any modulus with minimal external logic. - What is the package type and quantity for the MC74HC161ADTR2G?
The package type is TSSOP-16, and it is available in 2500 units per tape and reel.
