SN74LV4040A 12-Bit Asynchronous Binary Counter |

SN74LV4040A (ACTIVE) 12-Bit Asynchronous Binary Counter

12-Bit Asynchronous Binary Counter - SN74LV4040A


The ’LV4040A devices are 12-bit asynchronous binary counters with 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. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down.


  • 2-V to 5.5-V VCC Operation
  • Typical VOLP (Output Ground Bounce)
       <0.8 V at VCC = 3.3 V, TA = 25°C
  • Typical VOHV (Output VOH Undershoot)
       >2.3 V at VCC = 3.3 V, TA = 25°C
  • Supports 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 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)


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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Bits (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) Function Type Rating Operating temperature range (C) Package Group
SN74LV4040A Order now LV-A     2     5.5     12     2.5
0.02     12     12     -12     Counter     Binary     Catalog     -40 to 85     PDIP | 16
SOIC | 16
SO | 16
SSOP | 16
TSSOP | 16
TVSOP | 16
VQFN | 16