Overview
The MC74AC163DR2G, produced by onsemi, is a high-speed synchronous modulo-16 binary counter. This component is part of the MC74AC163/74ACT163 series, which are synchronously presettable and designed for applications in programmable dividers and synchronous multistage counters.
It features an asynchronous Master Reset input for the MC74AC161 and a Synchronous Reset input for the MC74AC163, allowing for versatile control over the counting and loading operations. The counters use D-type edge-triggered flip-flops and have multiple control inputs to manage different modes of operation, including asynchronous reset, synchronous reset, parallel load, count-up, and hold.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage) | 4.5 | 5.0 | 5.5 | V |
| VI (DC Input Voltage) | -0.5 | - | VCC + 0.5 | V |
| VO (DC Output Voltage) | -0.5 | - | VCC + 0.5 | V |
| fmax (Maximum Count Frequency) | 70 | - | 140 | MHz |
| tPLH (Propagation Delay CP to Qn) | 2.0 | - | 9.5 | ns |
| tPHL (Propagation Delay CP to Qn) | 1.5 | - | 10.0 | ns |
| ts (Setup Time, HIGH or LOW) | 5.5 | - | 16.0 | ns |
| th (Hold Time, HIGH or LOW) | -7.0 | - | -0.5 | ns |
| tw (Clock Pulse Width) | 2.0 | - | 4.0 | ns |
Key Features
- Synchronous Counting: The MC74AC163DR2G counts synchronously with the LOW-to-HIGH transition of the CP input signal.
- Multiple Control Inputs: Includes Master Reset (MR for MC74AC161), Synchronous Reset (SR for MC74AC163), Parallel Enable (PE), Count Enable Parallel (CEP), and Count Enable Trickle (CET) inputs.
- Terminal Count Output: Provides a Terminal Count (TC) output for forming synchronous multistage counters.
- High-Speed Operation: Supports high-speed counting with maximum frequencies up to 140 MHz.
- Low Power Consumption: Operates with low quiescent supply current, making it suitable for power-sensitive applications.
Applications
- Programmable Dividers: Ideal for use in programmable dividers due to its synchronous presettable capability.
- Synchronous Multistage Counters: Can be used to form complex counting circuits by cascading multiple counters.
- Digital Systems: Suitable for various digital systems requiring high-speed counting and control.
- Timing and Control Circuits: Useful in timing and control circuits where precise counting and reset capabilities are necessary.
Q & A
- What is the maximum count frequency of the MC74AC163DR2G?
The maximum count frequency is up to 140 MHz.
- What types of reset inputs are available on the MC74AC163DR2G?
The MC74AC163DR2G has a Synchronous Reset (SR) input.
- How many control inputs does the MC74AC163DR2G have?
The component has five control inputs: Master Reset (MR), Synchronous Reset (SR), Parallel Enable (PE), Count Enable Parallel (CEP), and Count Enable Trickle (CET).
- What is the purpose of the Terminal Count (TC) output?
The Terminal Count (TC) output is used for forming synchronous multistage counters.
- What is the typical supply voltage range for the MC74AC163DR2G?
The typical supply voltage range is 4.5 to 5.5 volts.
- What is the propagation delay from CP to Qn?
The propagation delay from CP to Qn is between 2.0 and 9.5 nanoseconds.
- What is the setup time for the Pn to CP input?
The setup time for the Pn to CP input is between 5.5 and 16.0 nanoseconds.
- What is the hold time for the Pn to CP input?
The hold time for the Pn to CP input is between -7.0 and -0.5 nanoseconds.
- What is the clock pulse width for the MC74AC163DR2G?
The clock pulse width is between 2.0 and 4.0 nanoseconds.
- What are the typical operating temperatures for the MC74AC163DR2G?
The component operates within a temperature range of -40°C to +85°C.
