Electronic Components

The 74LS15 is a three-input positive-AND gate IC with three separate inputs built in low-power. The logic AND function is performed by each of the three separate gates in this device. They use positive logic to perform the Boolean functions Y = A ? B ? C. This IC is designed to operate at temperatures ranging from 55?C to 125?C, which is the complete military temperature range. The 74HC logic family is pin-out compatible with the 74LS logic family of high grade. It features a 4.5V to 5.5V supply voltage range. The 74LS15 has a strong noise immunity and, as a result, can drive TTL loads. Internal diode clamps to VCC and ground protect all inputs from static discharge damage. The AND gate designed as a basic digital logic gate that implements logical conjunction. An AND gate operates on logical multiplication rules. If all the inputs to the AND gate are HIGH, then the output will be high. If none or not all inputs to the AND gate are HIGH, results in LOW output.

74LS15 Triple 3-InputT AND Gate IC (7415 IC) DIP-14 Package

This data selector/multiplexer contains full on-chip decoding to select the desired data source. The 74LS151 selects one-of-eight data sources. The 74LS151 has a strobe input which must be at a low logic level to enable these devices. A high level at the strobe forces the W output HIGH, and the Y output LOW. The 74LS151 features complementary W and Y outputs.

This data selector/multiplexer contains full on-chip decoding to select the desired data source. The 74LS151 selects one-of-eight data sources. The 74LS151 has a strobe input which must be at a low logic level to enable these devices. A high level at the strobe forces the W output HIGH, and the Y output LOW. The 74LS151 features complementary W and Y outputs.

In 74LS154 IC, Each of these 4-line-to-16-line decoders utilizes TTL circuitry to decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs, G1 and G2, are LOW. The demultiplexing function is performed by using the 4 input lines to address the output line, passing data from one of the strobe inputs with the other strobe input LOW. When either strobe input is HIGH, all outputs are HIGH. These demultiplexers are ideally suited for implementing high-performance memory decoders. All inputs are buffered and input clamping diodes are provided to minimize transmission-line effects and thereby simplify system design. 

74LS157 Quad 2-input multiplexer IC (74157 IC) DIP-16 Package

The 74LS158 is a high speed Quad 2-input Multiplexer. It selects four bits of data from two sources using the common Select and Enable inputs. The four buffered outputs present the selected data in the inverted form. The LS158 can also generate any four of the 16 different functions of two variables. The LS158 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families

The 74LS158 is a high speed Quad 2-input Multiplexer. It selects four bits of data from two sources using the common Select and Enable inputs. The four buffered outputs present the selected data in the inverted form. The LS158 can also generate any four of the 16 different functions of two variables. The LS158 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families