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This 8-bit flip-flop features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops of the SN74F574 are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs will be set to the logic levels that were set up at the data (D) inputs. A buffered output enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components. The output enable (OE) does not affect the internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN74F574 is characterized for operation from 0°C to 70°C.
Features :-
- Eight D-Type Flip-Flops in a Single Package
- 3-State Bus-Driving True Outputs
- Full Parallel Access for Loading
- Buffered Control Inputs
- Package Options Include Plastic Small-Outline Packages and Standard Plastic 300-mil DIPs
The 74F541 except that the inputs and outputs are on opposite sides of the package (see Connection Diagrams). This pinout arrangement makes these devices especially useful as output ports for microprocessors, allowing ease of layout and greater PC board density
Features :-
- 3-STATE outputs drive bus lines
- Inputs and outputs opposite side of package, allowing easier interface to microprocessors
The 74F533 consists of eight latches with 3-STATE outputs for bus organized system applications. The flip-flops appear transparent to the data when Latch Enable (LE) is HIGH. When LE is LOW, the data that meets the setup times is latched. Data appears on the bus when the Output Enable (OE) is LOW. When OE is HIGH the bus output is in the high impedance state.
Features :-
- Eight latches in a single package
- 3-STATE outputs for bus interfacing
The 74F521 is an expandable 8-bit comparator. It compares two words of up to eight bits each and provides a LOW output when the two words match bit for bit. The expansion input IA=B also serves as an active LOW enable input
Features :-
- Compares two 8-bit words in 6.5 ns typ
- Expandable to any word length
- 20-pin package
The 74F393 is a Dual Ripple Counter with separate Clock (CPn) and Master Reset (MR) inputs to each counter. The two counters are identified by the “a” and “b” suffixes in the pin configuration. The operation of each half of the 74F393 is the same. The counters are triggered by a High-to-Low transition of the Clock (CPa and CPb)inputs. The counter outputs are internally connected to provide Clock inputs to succeeding stages. The outputs of the ripple counter do not change synchronously and should not be used for high speed address decoding. The Master Resets (MRa and MRb) are active High asynchronous inputs; one for each 4-bit counter. A High level in the MR input overrides the Clock and sets the outputs Low
Features :-
- Two 4-bit binary counters
- Two Master Resets to clear each 4-bit counter individually
The F280 is a high-speed parity generator/checker that accepts nine bits of input data and detects whether an even or an odd number of these inputs is HIGH. If an even number of inputs is HIGH, the Sum Even output is HIGH. I fan odd number is HIGH, the Sum Even output is LOW. The Sum Odd output is the complement of the Sum Even out-put
The 74F251 is a high-speed 8-input digital multiplexer. It provides, in one package, the ability to select one bit of data from up to eight sources. It can be used as a universal function generator to generate any logic function of four variables. Both assertion and negation outputs are provided
Features :-
- Multifunctional Capacity
- On-Chip Select Logic Decoding
- Inverting and Noninverting 3-State Output
The 74F244 is an octal buffer that is ideal for driving bus lines of buffer memory address registers. The outputs are all capable of sinking 64mA and sourcing up to 15mA, producing very good capacitive drive characteristics. The device features two output enables, OEa and OEb, each controlling four of the 3-State outputs. The 74F244 is functionally equivalent to the 74F244. It has been designed to reduce effects of ground noise. Other advantages are noted in the features
Features :-
- Octal bus interface
- 3-State output buffer sink 64mA
- 15mA source current
- Guaranteed output skew less than 2.0ns (74F244B)
- Reduced ground bounce (74F244B)
- Reduced ICC (74F244B)
- Reduced loading (74F244B IIL = 40μA)
- Split lead frame offers increased noise immunity (74F244B)
- Industrial temperature range available (-40°C to +85°C) for 74F244
- 74F244 available in SSOP Type II package
The 74F240 are octal buffers and line drivers designed to be employed as memory and address drivers, clock drivers and bus-oriented transmitters/receivers which provide improved PC and board density.
Features:-
- 3-STATE outputs drive bus lines or buffer memory address registers
- Outputs sink 64mA (48mA mil)
- 12mA source current
- Input clamp diodes limit high-speed termination effects
The functional characteristics of the 74F194 4-Bit Bidirectional Shift Register are indicated in the Logic Diagram and Function Table. The register is fully synchronous, with all operations taking place in less than 9ns (typical) for 74F, making the device especially useful for implementing very high speed CPUs, or for memory buffer registers. The 74F194 design has special logic features which increase the range of application. The synchronous operation of the device is determined by two Mode Select inputs, S0 and S1. As shown in the Mode Select-Function Table, data can be entered and shifted from left to right (shift right, Q0→Q1, etc.), or right to left (shift left,Q3→Q2, etc.), or parallel data can be entered, loading all 4 bits of the register simultaneously. When both S0 and S1 are Low, existing data is retained in a hold (do nothing) mode. The first and last stages provide D-type Serial Data inputs (DSR, DSL) to allow multistage shift right or shift left data transfers without interfering with parallel load operation. Mode Select and data inputs on the74F194 are edge-triggered, responding only to the Low-to-High transition of the Clock (CP). Therefore, the only timing restriction is that the Mode Select and selected data inputs must be stable one setup time prior to the Low-to-High transition of the clock pulse. Signals on the Mode Select, Parallel Data (D0–D3) and Serial Data(DSR, DSL) can change when the clock is in either state, provide donly the recommended setup and hold times, with respect to the clock rising edge, are observed. The four Parallel Data inputs(D0–D3) are D-type inputs. Data appearing on (D0–D3) inputs whenS0 and S1 are High is transferred to the Q0–Q3 outputs respectively, following the next Low-to-High transition of the clock. When Low, the asynchronous Master Reset (MR) overrides all other input conditions and forces the Q outputs Low
Features :-
- Shift right and shift left capability
- Synchronous parallel and serial data transfer
- Easily expanded for both serial and parallel operation
- Asynchronous Master Reset
- Hold (do nothing) mode
The 74F182 is a high-speed carry lookahead generator. It is generally used with the 74F181 or 74F381 4-bit arithmetic logic units to provide high-speed lookahead over word lengths of more than four bits
Features :-
- Provides lookahead carries across a group of four ALUs
- Multi-level lookahead high-speed arithmetic operation over long word lengths
The 74F164 is an 8-bit edge-triggered shift register with serial data entry and an output from each of the eight stages. Data is entered through one of two inputs (Dsa, Dsb); either input can be used as an active High enable for data entry through the other input. Both inputs must be connected together or an unused input must be tied High. Data shifts one place to the right on each Low-to-High transition of the clock (CP) input, and enters into Q0 the logical AND of the two data inputs (Dsa, Dsb) that existed one setup time before the rising edge. A Low level on the Master Reset (MR) input overrides all other inputs and clears the register asynchronously, forcing all outputs Low.
Features :-
- Gated serial data inputs
- Typical shift frequency of 100MHz
- Asynchronous Master Reset
- Buffered clock and data inputs
- Fully synchronous data transfer
- Industrial temperature range available (–40 to +85 °C)
The 74F138 decoder accepts three binary weighted inputs (A0, A1, A2) and when enabled, provides eight mutually exclusive, active low outputs (Q0 – Q7). The device features three enable inputs; two active low (E0, E1) and one active high (E2). Every output will be high unless E0 and E1 are low and E2 is high. This multiple enable function allows easy parallel expansion of the device to 1–of–32 (5 lines to 32 lines) decoder with just four 74F138s and one inverter The device can be used as an eight output demultiplexer by using one of the active low enable inputs as the data input and the remaining enable inputs as strobes. Enable inputs not used must be permanently tied to their appropriate active high or active low state.
Features :-
- Demultiplexing capability
- Multiple input enable for easy expansion
- Ideal for memory chip select decoding
- Industrial temperature range available (–40°C to +85°C)
The 74F113 offers individual J, K, Set and Clock inputs. When the clock goes HIGH, the inputs are enabled and data may be entered. The logic level of the J and K inputs may be changed when the clock pulse is HIGH and the flip-flop will perform according to the Truth Table as long as minimum setup and hold times are observed. Input data is transferred to the outputs on the falling edge of the clock pulse.
Features :-
- Asynchronous input: LOW input to SD sets Q to HIGH level Set is independent of clock
The 74F109 is a dual positive edge-triggered JK-type flip-flop featuring individual J, K, clock, set, and reset inputs; also true and complementary outputs. Set (SD) and reset (RD) are asynchronous active low inputs and operate independently of the clock (CP) input. The J and K are edge-triggered inputs which control the state changes of the flip-flops as described in the function table. Clock triggering occurs at a voltage level and is not directly related to the transition time of the positive-going pulse. The J and K inputs must be stable just one setup time prior to the low-to-high transition of the clock for predictable operation. The JK design allows operation as a D flip-flop by tying J and K inputs together. Although the clock input is level sensitive, the positive transition of the clock pulse between the 0.8V and 2.0V levels should be equal to or less than the clock to output delay time for reliable operation
Features :-
Industrial temperature range available (–40°C to +85°C)Microchip PIC 18F4620 I / P DIP 8-Bit 40MHz Microcontroller .The product is in DIP-40 sheath and is 8-bit valued working with 40MHz frequency.Types of MicrocontrollersIt is from. 36 of the 40 pins on it are I / O, ie Input Output pins.
These microcontrollers with memory type FLASH operate between 4.2V and 5.5V supply range, and temperatures between -40 C ° and +85 C



















