74LS75 4-bit Bi-Stable Latch

The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS75 contains a 4-bit Bi-Stable Latch. These latches are ideally suited for use as temporary storage for binary information between processing units and input/output or indicator units.

74LS75 Features

• Designed as a Temporary Storage for Binary Information
• Latches Feature Complementary Q Outputs
• Fast Switching Speed
• Operating Temperature up to 70°C
• Standard TTL Switching Voltages

74LS75 Specifications

Supply Voltage	4.75 – 5.25Vdc
Maximum Clock Frequency	40Mhz
Power Dissipation	2mW/gate @100kHz
Minimum Output Current	8mA
Propagation Delay	10nS
Fan Out (TTL Loads)	20

74LS75 Pinout Diagram

74LS75 Pin Description

Pin No	Pin Name	Description
1	1Q’	Invert Output Pin Latch 1
2	1D	Data Input Pin Latch 1
3	2D	Data Input Pin Latch 2
4	3C,4C	NAND Gate 2 Input 2
5	VCC	NAND Gate 2 Input 2
6	3D	Data Input Pin Latch 3
7	4D	Data Input Pin Latch 4
8	4Q’	Invert Output Pin Latch 4
9	4Q	Output Pin Of Latch 4
10	3Q	Output Pin Of Latch 3
11	3Q’	Invert Output Pin Latch 3
12	GND	NAND Gate 3 Input 2
13	1C,2C	NAND Gate 3 Input 2
14	2Q’	Invert Output Pin Latch 2
15	2Q
16	1Q	Positive Supply

74LS75 Circuit

Here is a simple circuit of SR Latch using Logic Gate AND and NOR.

Applications

74LS75 Alternative Equivalent

Download 74LS75 4-bit Bi-Stable Latch Datasheet from the link given below.