Overview
The 74HC161D,653 from Nexperia USA Inc. is a synchronous presettable 4-bit binary counter. This integrated circuit is designed for synchronous operation, where all flip-flops are clocked simultaneously on the positive-going edge of the clock (CP). It features an internal look-ahead carry, which simplifies serial cascading of the counters. The counter can be preset to any value and has an asynchronous reset function. This component is part of the HC/UH series and is packaged in a 16-pin SOIC (SOT109-1) package.
Key Specifications
| Specification | Value |
|---|---|
| Type | Synchronous Presettable 4-Bit Binary Counter |
| Package | 16-pin SOIC (SOT109-1) |
| Supply Voltage | 2V to 6V |
| Clock Edge | Positive Edge Triggered |
| Reset | Asynchronous Master Reset |
| Count Enable Inputs | CEP and CET (both must be HIGH to count) |
| Terminal Count Output | Enabled by CET, produces a HIGH pulse on terminal count |
| Maximum Clock Frequency | Determined by CP to TC propagation delay and CEP to CP set-up time |
Key Features
- Synchronous operation with all flip-flops clocked simultaneously on the positive-going edge of the clock (CP)
- Internal look-ahead carry for simplified serial cascading
- Presettable to any value using parallel enable input (PE)
- Asynchronous master reset input (MR) sets all outputs LOW regardless of other input levels
- Terminal count output (TC) enabled by CET input
- Operating supply voltage range of 2V to 6V
Applications
The 74HC161D,653 is versatile and can be used in various applications across different industries, including:
- Automotive systems for counting and timing functions
- Industrial control systems for sequencing and timing
- Consumer electronics for digital counters and timers
- Computing and data processing for clocking and timing circuits
- Power management and control systems for precise timing and counting
Q & A
- What is the primary function of the 74HC161D,653? The primary function is to act as a synchronous presettable 4-bit binary counter.
- What is the package type of the 74HC161D,653? It is packaged in a 16-pin SOIC (SOT109-1).
- What is the supply voltage range for the 74HC161D,653? The supply voltage range is from 2V to 6V.
- How is the counter clocked? The counter is clocked on the positive-going edge of the clock (CP).
- What is the purpose of the internal look-ahead carry? The internal look-ahead carry simplifies serial cascading of the counters.
- How can the counter be reset? The counter can be reset asynchronously using the master reset input (MR).
- What is the function of the terminal count output (TC)? The TC output produces a HIGH pulse on terminal count, enabled by the CET input.
- What are the count enable inputs for the counter? The count enable inputs are CEP and CET, both of which must be HIGH to count.
- In which industries can the 74HC161D,653 be used? It can be used in automotive, industrial, consumer electronics, computing, and power management applications.
- How can the counter be preset? The counter can be preset using the parallel enable input (PE) and the data inputs (D0 to D3).
