Overview
The 74HC163D,652, produced by Nexperia USA Inc., is a presettable synchronous 4-bit binary counter with an internal look-ahead carry. This component operates synchronously, with all flip-flops clocked simultaneously on the positive-going edge of the clock (CP). It features synchronous reset and the ability to preset the outputs (Q0 to Q3) to either HIGH or LOW. The counter can be disabled by a LOW at the parallel enable input (PE), allowing the data at the data inputs (D0 to D3) to be loaded into the counter on the next clock edge. The master reset input (MR) can set all outputs to LOW after the next positive-going clock transition, regardless of other input levels.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC | Operating voltage | 4.5 | - | 5.5 | V |
| fmax | Maximum clock frequency at VCC = 5.0 V, CL = 15 pF | - | - | 50 | MHz |
| tsu | Set-up time for Dn to CP at VCC = 4.5 V | 21 | - | 44 | ns |
| tPHL, tPLH | Propagation delay CP to Q at VCC = 4.5 V, CL = 15 pF | 26 | - | 45 | ns |
| CI | Input capacitance | - | - | 3.5 | pF |
| CPD | Power dissipation capacitance at VCC = 5 V, fi = 1 MHz | - | - | 35 | pF |
Key Features
- Synchronous Operation: All flip-flops are clocked simultaneously on the positive-going edge of the clock (CP).
- Presettable Outputs: Outputs (Q0 to Q3) can be preset to HIGH or LOW.
- Internal Look-Ahead Carry: Simplifies serial cascading of counters.
- Parallel Enable Input (PE): A LOW at PE disables the counting action and loads data from D0 to D3 into the counter.
- Master Reset Input (MR): Sets all outputs to LOW after the next positive-going clock transition, regardless of other input levels.
- Synchronous Reset: Allows modification of the maximum count with a single external NAND gate.
Applications
- Digital Counters and Timers: Ideal for applications requiring synchronous counting and preset capabilities.
- Sequential Logic Circuits: Useful in circuits where synchronized counting and reset functions are necessary.
- Automated Systems: Can be used in automated systems that require precise and synchronized counting operations.
- Communication Systems: Suitable for communication systems that need to manage data transmission and reception based on synchronized counts.
Q & A
- What is the 74HC163D,652?
The 74HC163D,652 is a presettable synchronous 4-bit binary counter with an internal look-ahead carry, produced by Nexperia USA Inc.
- What is the operating voltage range of the 74HC163D,652?
The operating voltage range is from 4.5 V to 5.5 V.
- How does the parallel enable input (PE) function?
A LOW at the PE input disables the counting action and loads the data from D0 to D3 into the counter on the next clock edge.
- What is the purpose of the master reset input (MR)?
The MR input sets all outputs (Q0 to Q3) to LOW after the next positive-going clock transition, regardless of other input levels.
- What is the maximum clock frequency of the 74HC163D,652?
The maximum clock frequency is 50 MHz at VCC = 5.0 V and CL = 15 pF.
- How does the internal look-ahead carry feature benefit the counter?
The internal look-ahead carry simplifies serial cascading of the counters.
- Can the 74HC163D,652 be used in automated systems?
Yes, it is suitable for automated systems that require precise and synchronized counting operations.
- What is the input capacitance of the 74HC163D,652?
The input capacitance is 3.5 pF.
- Is the 74HC163D,652 RoHS compliant?
Yes, the 74HC163D,652 is RoHS compliant.
- What is the status of the 74HC163D,652 part?
The 74HC163D,652 is currently obsolete and no longer manufactured.
