BCD DECADE COUNTERS/ 4-BIT BINARY COUNTERS The SN74LS161N is a synchronous 4-bit binary counter manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)
- **Series:** 74LS
- **Logic Type:** Synchronous 4-Bit Binary Counter
- **Operating Voltage:** 4.75V to 5.25V
- **Maximum Clock Frequency:** 25 MHz (typical)
- **Propagation Delay:** 20 ns (typical)
- **Count Sequence:** Binary (0 to 15)
- **Reset Function:** Asynchronous Master Reset (MR)
- **Load Function:** Synchronous Parallel Load
- **Output Type:** TTL (Transistor-Transistor Logic)
- **Package Type:** PDIP-16 (Plastic Dual In-Line Package)
- **Operating Temperature Range:** 0°C to 70°C
### **Descriptions:**
- The SN74LS161N is a synchronous presettable 4-bit binary counter with an asynchronous clear (reset) function.
- It operates synchronously, meaning the outputs change state on the rising edge of the clock input.
- Features parallel load capability for preset initialization.
- Includes ripple carry output (RCO) for cascading multiple counters.
### **Features:**
- **Synchronous Counting:** All flip-flops are clocked simultaneously.
- **Asynchronous Reset (MR):** Clears all outputs to zero regardless of clock state.
- **Parallel Load (LOAD):** Allows preset data to be loaded synchronously.
- **Enable Inputs (P and T):** Control counting operation (P enables counting, T enables carry output).
- **Ripple Carry Output (RCO):** Facilitates cascading multiple counters.
- **TTL-Compatible Inputs and Outputs:** Ensures compatibility with other TTL logic devices.
- **Wide Operating Voltage Range:** 4.75V to 5.25V.
This information is strictly factual and derived from the manufacturer's datasheet.
