74LS109 IC in Pakistan

The 74LS160 IC package, consisting of 16 pins, contains a single 4 bit synchronous counter circuit which can be wired for decade counting mod, without external logic chips. By wiring more than one 74LS160 together (cascading), it is possible to make higher count lengths (powers of ten). For example, two 74LS160s cascaded together would yield a counter capable of decimally counting the range 00 – 99.

74HC157 is a high-speed multiplexer integrated circuit consisting of four 2-input digital multiplexers inside the chip. It is pin-compatible with Low-power Schottky TTL. It has two control inputs namely enable and select input. Additionally, it has two groups of registers. The selected input determines the register from which the data comes. Its operation is specified over a temperature range of -55 °C to 125 °C.

74LS47 accepts four lines of BCD (8421) input data, generates their complements internally and decodes the data with seven AND/OR gates having open-collector outputs to drive indicator segments directly. Each segment output is guaranteed to sink 24 mA in the ON (LOW) state and withstand 15V in the OFF (HIGH) state with a maximum leakage current of 250 µA. Auxiliary inputs provided blanking, 74LS47 BCD to 7-Segment Decoder/Driver IC.