74ls48 pin / pin function circuit diagram

The following is the pinout and functional diagram of the 74LS48 IC, a commonly used seven-segment display decoder driver in digital circuits and microcontroller-based systems. This chip plays a crucial role in converting binary-coded decimal (BCD) inputs into signals that drive seven-segment displays. Here's the pin configuration and function table for the 74LS48:

The 74LS48 is widely used in various applications such as digital clocks, calculators, and other electronic devices where numeric display is required. It provides a simple and efficient way to interface with common cathode seven-segment LED displays. Below is the detailed pin function table for the 74LS48:

74LS48 Pin Function Table - Seven Segment Decoding Driver
Decimal Number or Function	Input			BI/RBO	Output							Remarks
Decimal Number or Function	LT	RBI	DCBA	BI/RBO	a	b	c	d	e	f	g	Remarks
0	H	H	0000	H	1	1	1	1	1	1	0	1
1	H	x	0001	H	0	1	1	0	0	0	0
2	H	x	0010	H	1	1	0	1	1	0	1
3	H	x	0011	H	1	1	1	1	0	0	1
4	H	x	0100	H	0	1	1	0	0	1	1
5	H	x	0101	H	1	0	1	1	0	1	1
6	H	x	0110	H	0	0	1	1	1	1	1
7	H	x	0111	H	1	1	1	0	0	0	0
8	H	x	1000	H	1	1	1	1	1	1	1
9	H	x	1001	H	1	1	1	0	0	1	1
10	H	x	1010	H	0	0	0	1	1	0	1
11	H	x	1011	H	0	0	1	1	0	0	1
12	H	x	1100	H	0	1	0	0	0	1	1
13	H	x	1101	H	1	0	0	1	0	1	1
14	H	x	1110	H	0	0	0	1	1	1	1
15	H	x	1111	H	0	0	0	0	0	0	0
BI	x	x	XXXX	L	0	0	0	0	0	0	0	2
RBI	H	L	0000	L	0	0	0	0	0	0	0	3
LT	L	x	XXXX	H	1	1	1	1	1	1	1	4

This table illustrates how each input combination affects the output segments of the seven-segment display. Understanding these functions helps in designing circuits that use the 74LS48 effectively. Whether you're working on a simple digital clock or a more complex system, the 74LS48 remains a fundamental component in many electronics projects.

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