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M74LS191P Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
M74LS191PMIT200Yes

M74LS191P** is a 4-bit synchronous up/down binary counter manufactured by **MIT (Mitsubishi Electric Corporation)**.

The M74LS191P is a 4-bit synchronous up/down binary counter manufactured by MIT (Mitsubishi Electric Corporation).

Specifications:

  • Type: 4-bit synchronous up/down counter
  • Logic Family: LS-TTL (Low-Power Schottky)
  • Supply Voltage (Vcc): 4.75V to 5.25V
  • Operating Temperature Range: 0°C to +70°C
  • Counting Modes: Up or Down (selectable)
  • Clock Input: Synchronous (positive-edge triggered)
  • Load Input: Asynchronous parallel load capability
  • Outputs: 4-bit binary (Q0, Q1, Q2, Q3)
  • Max Clock Frequency: ~25 MHz (typical)
  • Power Dissipation: ~45 mW (typical)
  • Package: 16-pin DIP (Dual In-line Package)

Features:

  • Synchronous counting for reduced output skew
  • Asynchronous parallel load for preset values
  • Count enable and direction control (up/down select)
  • Ripple clock output for cascading multiple counters
  • TTL-compatible inputs and outputs
  • Low power consumption compared to standard TTL

Applications:

  • Digital frequency dividers
  • Event counters
  • Industrial control systems
  • Microprocessor-based systems

This part is part of the 74LS191 series, which is widely used in digital logic circuits.

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