Overview
The CD4044BD is a quad cross-coupled 3-state CMOS NAND latch produced by Texas Instruments. This component is part of the CD4044B series, which is designed for use in digital logic circuits. Each latch in the CD4044BD has a separate Q output and individual SET and RESET inputs, allowing for flexible control over the latch states. The Q outputs are controlled by a common ENABLE input, enabling or disabling the output states as needed. This device is suitable for various applications requiring independent storage and output enable functionality.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (D), PDIP (N), CDIP (J), SOP (NS), TSSOP (PW) |
| Pins | 16 |
| Operating Temperature Range (°C) | -55 to 125 |
| Supply Voltage (V) | 5, 10, 15 |
| Input Current (µA) | 1 µA at 18 V over full package temperature range; 100 nA at 18 V and 25°C |
| Noise Margin (V) | 1 V at VDD= 5 V, 2 V at VDD= 10 V, 2.5 V at VDD= 15 V |
| Package Quantity | Varies by package type (e.g., 40, 250, 2500) |
Key Features
- 3-state outputs with common output ENABLE
- Separate SET and RESET inputs for each latch
- NOR and NAND configurations (CD4044B is NAND, CD4043B is NOR)
- Standardized symmetrical output characteristics
- 100% tested for quiescent current at 20 V
- Meets all requirements of JEDEC Tentative Standard No. 13B, 'Standard Specifications for Description of 'B' Series CMOS Devices'
Applications
- Holding register in multi-register systems
- Four bits of independent storage with output ENABLE
- Strobed register
- General digital logic
- Specifically, CD4044B for negative logic systems and CD4043B for positive logic systems
Q & A
- What is the CD4044BD? The CD4044BD is a quad cross-coupled 3-state CMOS NAND latch produced by Texas Instruments.
- What are the key features of the CD4044BD? It includes 3-state outputs, separate SET and RESET inputs, and standardized symmetrical output characteristics.
- What are the different package types available for the CD4044BD? The device is available in SOIC (D), PDIP (N), CDIP (J), SOP (NS), and TSSOP (PW) packages.
- What is the operating temperature range of the CD4044BD? The operating temperature range is -55°C to 125°C.
- What are the typical applications of the CD4044BD? It is used in holding registers, strobed registers, and general digital logic circuits.
- Is the CD4044BD still in production? The CD4044BD is obsolete and no longer manufactured, but substitutes like CD4044BDR are available.
- What is the significance of the ENABLE input in the CD4044BD? The ENABLE input controls the Q outputs, connecting or disconnecting them from the latch states.
- What are the noise margins for the CD4044BD at different supply voltages? The noise margins are 1 V at VDD= 5 V, 2 V at VDD= 10 V, and 2.5 V at VDD= 15 V.
- Does the CD4044BD meet any specific industry standards? Yes, it meets all requirements of JEDEC Tentative Standard No. 13B.
- What is the maximum input current for the CD4044BD? The maximum input current is 1 µA at 18 V over the full package temperature range and 100 nA at 18 V and 25°C.
