Overview
The CD4044BE, produced by Texas Instruments, is a quad cross-coupled 3-state CMOS NAND latch. This integrated circuit is part of the CD4000 series and is designed for use in a variety of digital logic applications. Each latch within the CD4044BE has a separate Q output and individual SET and RESET inputs, allowing for flexible and independent control of each latch. The outputs are controlled by a common ENABLE input, which can connect or disconnect the latch states from the Q outputs, facilitating common busing of the outputs.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | PDIP (N), CDIP (J), SOP (NS), TSSOP (PW), TSSOP (PWR) |
| Pins | 16 |
| Operating Temperature Range (°C) | -55 to 125 |
| Supply Voltage Range (V) | 2 to 15 |
| Maximum Input Current at 18 V | 1 µA over full package temperature range, 100 nA at 25°C |
| Noise Margin at VDD (V) | 1 V at 5 V, 2 V at 10 V, 2.5 V at 15 V |
| Quiescent Current Test | 100% tested at 20 V |
Key Features
- 3-state outputs with common output ENABLE
- Separate SET and RESET inputs for each latch
- NOR and NAND configurations (CD4044B for negative logic systems)
- 5-V, 10-V, and 15-V parametric ratings
- Standardized symmetrical output characteristics
- Maximum input current of 1 µA at 18 V over full package temperature range; 100 nA at 18 V and 25°C
- Noise margin (over full package temperature range): 1 V at VDD= 5 V, 2 V at VDD= 10 V, 2.5 V at VDD= 15 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
- Positive logic systems (CD4043B) and negative logic systems (CD4044B)
Q & A
- What is the CD4044BE?
The CD4044BE is a quad cross-coupled 3-state CMOS NAND latch produced by Texas Instruments. - What are the key features of the CD4044BE?
Key features include 3-state outputs, separate SET and RESET inputs, NOR and NAND configurations, and standardized symmetrical output characteristics. - What are the operating temperature and voltage ranges for the CD4044BE?
The operating temperature range is -55 to 125°C, and the supply voltage range is 2 to 15 V. - What is the maximum input current for the CD4044BE?
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. - What are some common applications of the CD4044BE?
Common applications include holding registers in multi-register systems, four bits of independent storage with output ENABLE, strobed registers, and general digital logic. - What types of packages are available for the CD4044BE?
The CD4044BE is available in PDIP (N), CDIP (J), SOP (NS), TSSOP (PW), and TSSOP (PWR) packages. - Does the CD4044BE meet any specific industry standards?
Yes, it meets all requirements of JEDEC Tentative Standard No. 13B, 'Standard Specifications for Description of 'B' Series CMOS Devices'. - How does the ENABLE input function on the CD4044BE?
The ENABLE input connects or disconnects the latch states from the Q outputs. A logic '1' or high on the ENABLE input connects the latch states to the Q outputs, while a logic '0' or low disconnects them. - What is the significance of the 3-state outputs on the CD4044BE?
The 3-state outputs allow for common busing of the outputs, which is useful in various digital logic applications. - Can the CD4044BE be used in both positive and negative logic systems?
Yes, the CD4044B is used for negative logic systems, while the CD4043B is used for positive logic systems.
