SN74LS173AN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data storage and retrieval
• Characteristics: High-speed, low-power consumption
• Package: DIP (Dual In-line Package)
• Essence: 4-bit D-type transparent latch
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage: 4.75V to 5.25V
• Operating Temperature Range: 0°C to 70°C
• Input Voltage High Level (VIH): 2V min
• Input Voltage Low Level (VIL): 0.8V max
• Output Voltage High Level (VOH): 2.7V min
• Output Voltage Low Level (VOL): 0.5V max
• Propagation Delay Time (tpd): 15ns max
• Power Dissipation (PD): 500mW max

Detailed Pin Configuration

The SN74LS173AN has a total of 16 pins. The pin configuration is as follows:

1. CLR (Clear) - Active LOW input for clearing the latch
2. D0 (Data Input 0) - Input for the least significant bit (LSB)
3. D1 (Data Input 1) - Input for the second least significant bit
4. D2 (Data Input 2) - Input for the third least significant bit
5. D3 (Data Input 3) - Input for the most significant bit (MSB)
6. GND (Ground) - Ground reference
7. Q0 (Output 0) - Output for the least significant bit (LSB)
8. Q1 (Output 1) - Output for the second least significant bit
9. Q2 (Output 2) - Output for the third least significant bit
10. Q3 (Output 3) - Output for the most significant bit (MSB)
11. CP (Clock Pulse) - Input for clock signal
12. MR (Master Reset) - Active LOW input for resetting the latch
13. D4 (Data Input 4) - Additional data input
14. D5 (Data Input 5) - Additional data input
15. VCC (Supply Voltage) - Positive power supply
16. NC (No Connection) - Not connected pin

Functional Features

The SN74LS173AN is a 4-bit D-type transparent latch with asynchronous clear and master reset inputs. It can store and retrieve data in a digital system. The latch is transparent when the clock pulse (CP) is high, allowing the input data to pass through to the outputs. When the CP is low, the latch holds the last input data.

Advantages: - High-speed operation enables efficient data storage and retrieval. - Low-power consumption makes it suitable for battery-powered devices. - Asynchronous clear and master reset inputs provide flexibility in controlling the latch.

Disadvantages: - Limited storage capacity of only 4 bits. - Requires an external clock signal for proper operation.

Working Principles

The SN74LS173AN operates based on the principles of digital logic. When the clock pulse (CP) is high, the latch is transparent, and the input data is transferred to the outputs. The outputs change according to the input data. When the CP is low, the latch holds the last input data, and the outputs remain unchanged.

The asynchronous clear (CLR) input allows the user to clear the latch and set all outputs to a known state. The master reset (MR) input resets the latch asynchronously, overriding the clock pulse.

Detailed Application Field Plans

The SN74LS173AN can be used in various applications, including:

1. Microcontrollers: Used for temporary storage of data during processing.
2. Data communication systems: Used for buffering and synchronization of data signals.
3. Digital displays: Used for storing and driving segment data in multiplexed displays.
4. Memory address decoding: Used for selecting specific memory locations.

Detailed and Complete Alternative Models

1. SN74LS373N: 8-bit transparent latch with similar characteristics and package.
2. SN74LS374N: 8-bit D-type flip-flop with similar characteristics and package.
3. SN74LS175N: 4-bit D-type flip-flop with asynchronous clear input.

These alternative models provide similar functionality and can be used as substitutes for the SN74LS173AN in various applications.

In conclusion, the SN74LS173AN is a 4-bit D-type transparent latch that offers high-speed operation, low-power consumption, and flexibility in controlling data storage. It finds applications in microcontrollers, data communication systems, digital displays, and memory address decoding. Alternative models such as the SN74LS373N, SN74LS374N, and SN74LS175N provide similar functionality and can be used as alternatives