CMOS - CD4027, Dual J-K Flip-Flop, 16-Pin DIP

CMOS - CD4027, Dual J-K Flip-Flop, 16-Pin DIP

CMOS - CD4027, Dual J-K Flip-Flop, 16-Pin DIP image 1
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CD4027B is a single monolithic chip integrated circuit containing two identical complementary-symmetry J-K flip flops. Each flip-flop has provisions for individual J, K, Set, Reset, and Clock input signals. Buffered Q and Q signals are provided as outputs. This input-output arrangement provides for compatible operation with the CD4013B dual D-type flip-flop.

The CD4027B is useful in performing control, register, and toggle functions. Logic levels present at the J and K inputs along with internal self-steering control the state of each flip-flop; changes in the flip-flop state are synchronous with the positive-going transition of the clock pulse. Set and reset functions are independent of the clock and are initiated when a high level signal is present at either the Set or Reset input.


  • Set-reset capability
  • Static flip-flop operation – retains state indefinitely with clock level either high or low
  • Medium speed operation – 16 MHz (typical) clock toggle rate at 10 V
  • Standardized symmetrical output characteristics
  • 100% tested for quiescent current at 20 V
  • Maximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
  • Noise margin (over full package-temperature range):
    • 1 V at VDD = 5 V
    • 2 V at VDD = 10 V
    • 2.5 V at VDD = 15 V
    • 5 V, 10 V, and 15 V parametric ratings
  • Meets all requirements of JEDEC tentative standard No. 138, standard specifications for description of ’B’ series CMOS devices
Item ID:
Texas Instruments Part Number:
RoHS Compliant
Clock frequency (MHz)12
FeaturesBalanced outputs, Positive edge triggered, Standard speed (tpd > 50ns), Positive input clamp diode, Preset, Clear
IOH (Max) (mA)-1.5
IOL (Max) (mA)1.5
Input typeTTL
Number of channels2
Output typePush-Pull
Supply current (Max) (µA)600
Supply voltage (Max) (V)18
Supply voltage (Min) (V)3
Technology familyCD4000
Packaging Information
Packaging Dimensions0.775 in. × 0.35 in. × 0.3 in.
Weight (Packaging)0.0035 lbs.
PDF: DatasheetAll Models

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PDF: Datasheet Datasheet1.36 MB
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