74LS116 Dual 4-Bit Latch IC With Clear

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74LS116 belongs to the 74XXYY IC series. The 74LS116 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC offers a wide array of features such as variable operating voltages & thermal protection.

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What is a D-Type Latching Circuit?

A latch is a device that can be used to store one bit of information. The D latch is used to capture, or ‘latch’ the logic level which is present on the Data line when the clock input is high. If the data on the D line changes state while the clock pulse is high, then the output, Q, follows the input, D. When the CLK input falls to logic 0, the last state of the D input is trapped and held in the latch.

74LS116 Key features & Specifications

Technology Family: LS
VCC (Min): 4.75V
VCC (Max): 5.25V
Bits (#): 4
Voltage (Nom): 5V
Frequency at operating voltage (Max): 35MHz
Propagation delay (Max): 40ns
IOL (Max): 16mA
IOH (Max): -0.8mA
Operating temperature range (C): 0 to 70

74LS116 Pinout

Pin Name	Pin No.	Description
1CLR’	1	Active Low Clear pin 1
1G1′	2	Active Low Input 1G1
1G2′	3	Active Low Input 1G2
1D1	4	Input Pin 1D1
1Q1	5	Output Pin 1Q1
1D2	6	Input Pin 1D2
1Q2	7	Output Pin 1Q2
1D3	8	Input Pin 1D3
1Q3	9	Output Pin 1Q3
1D4	10	Input Pin 1D4
1Q4	11	Output Pin 1Q4
GND	12	Ground Pin
2CLR’	13	Active Low Clear pin 1
2G1′	14	Active Low Input 2G1
2G2′	15	Active Low Input 2G2
2D1	16	Input Pin 2D1
2Q1	17	Output Pin 2Q1
2D2	18	Input Pin 2D2
2Q2	19	Output Pin 2Q2
2D3	20	Input Pin 2D3
2Q3	21	Output Pin 2Q3
2D4	22	Input Pin 2D4
2Q4	23	Output Pin 2Q4
Vcc	24	Chip Supply Voltage