CD4043BNSR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Gate
• Characteristics: Quad NOR R/S Latch with 3-State Outputs
• Package: SOIC-16
• Essence: The CD4043BNSR is a quad NOR R/S latch with 3-state outputs, designed for general-purpose logic applications.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Supply Voltage Range: 3V to 18V
• High-Level Input Voltage: 2V
• Low-Level Input Voltage: 0.8V
• High-Level Output Voltage: 4.6V
• Low-Level Output Voltage: 0.1V
• Maximum Quiescent Current: 10µA
• Maximum Operating Frequency: 6MHz

Detailed Pin Configuration

The CD4043BNSR has a total of 16 pins, which are assigned as follows:

1. S1 - Set input for latch 1
2. R1 - Reset input for latch 1
3. Q1 - Output for latch 1
4. Q̅1 - Complementary output for latch 1
5. S2 - Set input for latch 2
6. R2 - Reset input for latch 2
7. Q2 - Output for latch 2
8. Q̅2 - Complementary output for latch 2
9. S3 - Set input for latch 3
10. R3 - Reset input for latch 3
11. Q3 - Output for latch 3
12. Q̅3 - Complementary output for latch 3
13. S4 - Set input for latch 4
14. R4 - Reset input for latch 4
15. Q4 - Output for latch 4
16. Q̅4 - Complementary output for latch 4

Functional Features

• Quad NOR R/S Latch: The CD4043BNSR consists of four independent NOR R/S latches, each with separate set (S) and reset (R) inputs.
• 3-State Outputs: The latch outputs (Q) are 3-state, allowing them to be connected to a common bus line.
• Direct Set/Reset Inputs: The S and R inputs provide direct control over the latch state.
• Schmitt Trigger Inputs: The inputs have Schmitt trigger action, ensuring noise immunity and improved input signal shaping.

Advantages and Disadvantages

Advantages

• Versatile Logic Function: The quad NOR R/S latch provides flexibility in designing various logic circuits.
• 3-State Outputs: The 3-state outputs allow multiple devices to share a common bus line, reducing the number of required connections.
• Schmitt Trigger Inputs: The Schmitt trigger inputs enhance noise immunity and signal integrity.

Disadvantages

• Limited Operating Frequency: The maximum operating frequency of 6MHz may not be sufficient for high-speed applications.
• Single Package Option: The CD4043BNSR is only available in the SOIC-16 package, limiting its compatibility with other package types.

Working Principles

The CD4043BNSR operates based on the NOR latch principle. The set (S) and reset (R) inputs control the latch state. When the S input is activated, the corresponding latch output (Q) goes high, while the complementary output (Q̅) goes low. Conversely, activating the R input sets Q low and Q̅ high. The latch holds its state until the opposite input is activated.

Detailed Application Field Plans

The CD4043BNSR can be used in various applications, including:

1. Data Storage: The quad NOR R/S latch can be used to store binary data in memory circuits.
2. Address Decoding: It is suitable for address decoding in microprocessor-based systems.
3. Bus Control: The 3-state outputs allow multiple devices to share a common bus line, enabling efficient bus control.

Detailed and Complete Alternative Models

• CD4043BE: DIP-16 package variant of the CD4043BNSR.
• CD4043BM: SOIC-14 package variant with reduced pin count.
• CD4043BQ: CFP-16 package variant with improved thermal performance.

These alternative models offer similar functionality to the CD4043BNSR but may differ in package type or pin configuration.

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