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Texas Instruments SN74LV4040x 12-Bit Asynchronous Binary Counters

Texas Instruments SN74LV4040x 12-Bit Asynchronous Binary Counters that have the outputs of all stages available externally. A high level at the clear (CLR) input asynchronously clears the counter and resets all outputs low. The count is advanced on a high-to-low transition at the clock (CLK) input. Applications include time-delay circuits, counter controls, and frequency-dividing circuits.

These devices are fully specified for partial-power-down applications using Ioff. When powered down, the Ioff circuitry disables the outputs, preventing damaging current backflow through the devices. The Texas Instruments SN74LV4040x-EP devices have gold bond wires, a temperature range of –55 to +105°C, and an SnPb lead finish.

Features

  • 2V to 5.5V VCC operation
  • Typical VOLP (output ground bounce) < 0.8V at VCC = 3.3V, TA = 25°C
  • Typical VOHV (output VOH undershoot) 2.3V at VCC = 3.3V, TA = 25°C
  • Support mixed-mode voltage operation on all ports
  • High on-off output-voltage ratio
  • Low crosstalk between switches
  • Individual switch controls
  • Extremely low input current
  • Ioff supports partial-power-down mode operation
  • Latch-up performance exceeds 100mA per JESD 78, class II

Applications

  • Counter controls
  • Frequency-dividing circuits
  • Time-delay circuits

Logic Diagram (Positive Logic)

Location Circuit - Texas Instruments SN74LV4040x 12-Bit Asynchronous Binary Counters

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Publicado: 2024-12-03 | Actualizado: 2025-04-29