74LS253 3-State Dual 4-Input Multiplexer IC (74253) DIP-16 Package

74HC158 is a 16 Pin Quad 2-Input Multiplexer IC having 2V to 6V Operating Voltage range with 1uA Low Input current and high noise immunity. It select 4 bits of data from two sources under the control of a common data select input (S). The enable input (E) is active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all other input conditions.

Features:-

• Common Select Input
• Separate Enable Inputs
• Buffered inputs and Outputs
• Fanout (Over Temperature Range)
• Standard Outputs  : 10 LSTTL Loads
• Bus Driver Outputs : 15 LSTTL Loads
• Wide Operating Temperature Range : -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL Logic ICs
• HC Types
• 2V to 6V Operation
• High Noise Immunity: NIL = 30%, NIH = 30%of VCC at VCC = 5V
• HCT Types-
• 4.5V to 5.5V Operation
• Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min)
• CMOS Input Compatibility, Il≤1μA at VOL, VOH

 

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 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 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