This Product Selection Guide contains information to help select products in the Logic – Flip Flops category on DigiKey.com
Logic – Flip Flops Flip-flops are elementary digital memory devices capable of storing a single logic state or “bit” of information. They have at least two inputs; one or more to communicate the data to be stored and another to indicate the point in time to store it. Different flip-flop types such as D (delay), SR (Set-Reset), and JK respond differently to the signals presented to their inputs and can be used to implement different logical functions. They differ from latches in that they are edge sensitive devices, whose retained logic state changes only at the moment a valid clock signal is received.
SelectionCharacteristics
Specifications to determine which Flip Flop is right for your application.
Function: Identifies how the device works within the system.
Type: Select preferred circuit type.
Available Types
D-Type - A D (or Delay) flip flop is a digital electronic circuit used to delay the change of state of its output signal (Q) until the next rising edge of a clock timing input signal occurs.
JK Type - A JK flip flop will respond differently to the signals presented to their inputs and can be used to implement different logical functions. They differ from latches in that they are edge sensitive devices, whose retained logic state changes only at the moment a valid clock signal is received.
T-Type - A T type flip flop has its J and K inputs tied together.
Output Type: Select preferred output type.
Available Types
Complementary - This output contains both negative and positive signals, or NPN & PNP.
Differential - Two outputs which are equal but opposite, which typically represent the difference between the inputs.
Inverted - An output which is opposite than the input polarity.
Non-Inverted - An output which represents the input polarity.
Push-Pull - An output which uses NPN and PNP to represent both the negative and positive cycle.
Tri-State - A third state, which is in between positive and ground.
Number of Elements: Indicates the number of instances of a basic function that are incorporated within a device package.
Number of Bits per Elements: Indicates the data width or number of signals processed in parallel by each independent instance of a function contained within a device.
Clock Frequency: Indicates maximum operating clock frequency.
Max Propagation Delay @ V, Max CL: Characterizes the maximum time delay between assertion of a device input and appearance of the resulting change in device output, subject to the indicated supply voltage and load capacitance conditions.
Trigger Type: Indicates whether changes in device state are initiated by rising or falling edges of a clock input signal.
Current – Output High, Low: Indicates maximum output current when output is sourcing or sinking.
Voltage – Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.
Current – Quiescent (Iq): Characterizes the amount of supply current required to power a device’s internal functions. Measured with no output load and inputs connected to fixed-voltage signals defined by the manufacturer.
Input Capacitance: The typical capacitance between a signal input and a device’s common/ground terminal, measured under manufacturer-defined test conditions.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Mounting Type: Indicates how the device is attached.
Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the suppliers device packaging. Typically, it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
ProductExamples
| MFR PART # | SN74HC112N |
|---|---|
| DIGIKEY PART # | 296-12121-5-ND |
| MANUFACTURER | Texas Instruments |
| DESCRIPTION | Flip Flop 2 Element JK Type 1 Bit Negative Edge 16-DIP (0.300", 7.62mm) |
| DATASHEET | Click Here |
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