SN74LS373NSR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Octal Transparent Latch with 3-State Outputs
• Characteristics: High-speed, low-power consumption, compatible with TTL logic levels
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The SN74LS373NSR is a latch IC that can store and output data in an octal format. It provides a convenient way to control multiple outputs using a single input signal.
• Packaging/Quantity: The SN74LS373NSR is typically sold in reels containing 2500 units.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Input Voltage: 2V to 5.25V
• Output Voltage: 0V to 5.25V
• Operating Temperature Range: -40°C to 85°C
• Propagation Delay Time: 15ns (max)
• Output Current: ±8mA

Detailed Pin Configuration

The SN74LS373NSR has a total of 20 pins. The pin configuration is as follows:

1. D0 - Data Input 0
2. D1 - Data Input 1
3. D2 - Data Input 2
4. D3 - Data Input 3
5. D4 - Data Input 4
6. D5 - Data Input 5
7. D6 - Data Input 6
8. D7 - Data Input 7
9. GND - Ground
10. OE - Output Enable
11. LE - Latch Enable
12. Q0 - Output 0
13. Q1 - Output 1
14. Q2 - Output 2
15. Q3 - Output 3
16. Q4 - Output 4
17. Q5 - Output 5
18. Q6 - Output 6
19. Q7 - Output 7
20. VCC - Supply Voltage

Functional Features

• Octal transparent latch with 3-state outputs
• Data inputs can be latched or transparently passed to the outputs
• Outputs can be disabled using the output enable (OE) pin
• Latch enable (LE) pin controls the latching of data inputs to outputs
• High-speed operation allows for efficient data transfer

Advantages and Disadvantages

Advantages: - High-speed operation enables quick data transfer - Low-power consumption makes it suitable for battery-powered devices - Compatible with TTL logic levels, ensuring compatibility with existing systems - 3-state outputs provide flexibility in controlling multiple outputs

Disadvantages: - Limited number of outputs (8 in total) - Propagation delay time may affect real-time applications - Requires external control signals for proper operation

Working Principles

The SN74LS373NSR operates as an octal transparent latch with 3-state outputs. It stores data from the input pins and outputs it to the corresponding output pins when the latch enable (LE) signal is active. The outputs can be disabled by deactivating the output enable (OE) signal.

When the latch enable signal is active, the data inputs are latched and stored in the internal memory. The stored data is then available at the outputs. When the latch enable signal is inactive, the outputs hold their previous state.

The output enable signal allows the outputs to be enabled or disabled. When the output enable signal is active, the outputs are enabled and reflect the stored data. When the output enable signal is inactive, the outputs enter a high-impedance state, effectively disconnecting them from the external circuit.

Detailed Application Field Plans

The SN74LS373NSR can be used in various applications, including:

1. Data storage and retrieval systems
2. Address decoding circuits
3. Bus interface units
4. Register banks
5. Multiplexers and demultiplexers
6. Control logic circuits

Its ability to control multiple outputs using a single input signal makes it particularly useful in systems where efficient data transfer and output control are required.

Detailed and Complete Alternative Models

• SN74LS373D - DIP (Dual In-line Package) version of the SN74LS373NSR
• SN74HC373N - High-speed CMOS version of the octal transparent latch
• CD74HCT373E - Octal transparent latch with 3-state outputs from Texas Instruments

These alternative models offer similar functionality and can be used as replacements for the SN74LS373NSR depending on specific requirements and availability.

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