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74HCT191 from HAR

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74HCT191

Manufacturer: HAR

Presettable synchronous 4-bit binary up/down counter

Partnumber Manufacturer Quantity Availability
74HCT191 HAR 13368 In Stock

Description and Introduction

Presettable synchronous 4-bit binary up/down counter The 74HCT191 is a high-speed CMOS logic device manufactured by various companies, including Texas Instruments, NXP Semiconductors, and others. It is a 4-bit synchronous up/down binary counter with asynchronous reset. Key specifications include:

- **Supply Voltage (VCC):** 4.5V to 5.5V
- **Operating Temperature Range:** -40°C to +85°C
- **Logic Family:** HCT (High-Speed CMOS with TTL compatibility)
- **Counting Modes:** Up and Down
- **Clock Input:** Synchronous
- **Asynchronous Reset:** Yes
- **Output Current:** ±4mA (typical)
- **Propagation Delay:** Typically 20ns
- **Package Options:** DIP (Dual In-line Package), SOIC (Small Outline Integrated Circuit), and others
- **Pin Count:** 16

These specifications are standard for the 74HCT191 and may vary slightly depending on the manufacturer. Always refer to the specific datasheet for detailed information.

Partnumber Manufacturer Quantity Availability
74HCT191 PHI 12500 In Stock

Description and Introduction

Presettable synchronous 4-bit binary up/down counter The 74HCT191 is a high-speed CMOS logic device manufactured by Philips (PHI). It is a 4-bit synchronous up/down binary counter with asynchronous reset. The device operates with a supply voltage range of 4.5V to 5.5V and is compatible with TTL levels. It features a maximum clock frequency of 62 MHz and a typical propagation delay of 15 ns. The 74HCT191 is available in various package types, including DIP, SO, and TSSOP. It is designed for applications requiring high-speed counting and is commonly used in digital systems for frequency division, time delay generation, and event counting.

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