Specifications:

• Complies with: JEDEC standard no. 7A
• Input Type: CMOS
• Counting Type: Synchronous reversible counting
• Parallel Load: Asynchronous
• Count Enable Control: For synchronous expansion
• Control Input: Single up/down control input
• ESD Protection:
  • HBM JESD22-A114F exceeds 2000 V
  • MM JESD22-A115-A exceeds 200 V
• Operating Temperature: Specified from -40 °C to +85 °C and -40 °C to +125 °C

Package:

• 1x 74HC191 Presettable synchronous 4-bit binary up/down counter

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Description:
The 74HC191 is a presettable synchronous 4-bit binary up/down counter. It is compliant with JEDEC standard no. 7A and features CMOS input levels, synchronous reversible counting, and asynchronous parallel load. This counter module has count enable control for synchronous expansion and a single up/down control input. It also offers robust ESD protection, making it highly reliable in various electronic applications. The device operates in a wide temperature range from -40 °C to +125 °C.

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FAQ:

1. What is the purpose of the 74HC191?
   The 74HC191 is a 4-bit binary up/down counter used in digital systems for counting applications.

2. What type of input does the 74HC191 use?
   It uses CMOS input levels.

3. What is the temperature range for the 74HC191?
   It operates from -40 °C to +85 °C and can be specified up to +125 °C.

4. Does the 74HC191 offer ESD protection?
   Yes, it provides ESD protection exceeding 2000 V (HBM) and 200 V (MM).

5. What is the counting method of the 74HC191?
   It features synchronous reversible counting with asynchronous parallel load.

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