Synchronous Presettable 4-Bit Counter The TC74VHC161FK is a synchronous presettable binary counter manufactured by Toshiba. Here are its specifications, descriptions, and features:
### **Specifications:**
- **Logic Family:** VHC (Very High-Speed CMOS)
- **Supply Voltage Range:** 2.0V to 5.5V
- **High-Speed Operation:** 5.5 ns (max) at 5V
- **Low Power Consumption:** 4 μA (max) at 5V
- **Output Current:** ±8 mA at 5V
- **Operating Temperature Range:** -40°C to +85°C
- **Package Type:** SOP (Small Outline Package)
- **Pin Count:** 16
### **Descriptions:**
- **Function:** 4-bit synchronous binary counter with asynchronous reset and parallel load capability.
- **Counting Mode:** Synchronous counting with carry output for cascading.
- **Reset Function:** Asynchronous master reset (MR) clears all flip-flops.
- **Parallel Load:** Allows preset data input (D0-D3) when load (PL) is active.
- **Clock Input:** Positive-edge triggered (CP).
- **Enable Controls:** Count enable (CEP, CET) for synchronous operation.
### **Features:**
- **High-Speed CMOS Technology:** Ensures fast operation with low power consumption.
- **Wide Operating Voltage:** Compatible with 3.3V and 5V systems.
- **Asynchronous Reset:** Immediate counter clearing.
- **Synchronous Counting:** Controlled by clock and enable inputs.
- **Carry Output (TC):** Facilitates cascading multiple counters.
- **Schmitt Trigger Inputs:** Improved noise immunity.
This information is based on Toshiba's datasheet for the TC74VHC161FK.
