Overview
The SN74HC259NSR, produced by Texas Instruments, is an 8-bit addressable latch integrated circuit. This device is designed for general-purpose storage applications in digital systems, offering versatility in various operational modes. It can function as working registers, serial-holding registers, and active-high decoders or demultiplexers. The SN74HC259NSR is part of the HC series, known for its wide operating voltage range and low power consumption, making it suitable for a variety of digital circuit designs.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | - | 6 | V |
| Input Current | - | - | 1 μA | μA |
| Output Drive at 5 V | - | - | ±4 mA | mA |
| Continuous Output Current | - | - | ±25 mA | mA |
| Junction Temperature | - | - | 150 °C | °C |
| Storage Temperature | -65 | - | 150 | °C |
| Propagation Delay (tpd) | 14 | - | 26 | ns |
| Power Dissipation Capacitance per Latch | - | 33 | - | pF |
Key Features
- Wide operating voltage range of 2 V to 6 V
- High-current inverting outputs drive up to 10 LSTTL loads
- Low power consumption, with a maximum ICC of 80 μA
- Typical propagation delay of 14 ns
- ±4-mA output drive at 5 V
- Low input current of 1 μA max
- 8-bit parallel-out storage register performs serial-to-parallel conversion with storage
- Asynchronous parallel clear
- Active-high decoder
- Enable input simplifies expansion
- Expandable for n-bit applications
- Four distinct functional modes: addressable latch, memory, 1-of-8 decoding or demultiplexing, and clear mode
Applications
The SN74HC259NSR is suitable for various digital system applications, including:
- Working registers
- Serial-holding registers
- Active-high decoders or demultiplexers
- General-purpose storage in digital systems
Q & A
- What is the operating voltage range of the SN74HC259NSR?
The operating voltage range is from 2 V to 6 V.
- What is the maximum input current for the SN74HC259NSR?
The maximum input current is 1 μA.
- How many LSTTL loads can the SN74HC259NSR drive?
The SN74HC259NSR can drive up to 10 LSTTL loads.
- What is the typical propagation delay of the SN74HC259NSR?
The typical propagation delay is 14 ns.
- What are the different functional modes of the SN74HC259NSR?
The SN74HC259NSR has four distinct functional modes: addressable latch, memory, 1-of-8 decoding or demultiplexing, and clear mode.
- Can the SN74HC259NSR be expanded for n-bit applications?
- What is the maximum junction temperature for the SN74HC259NSR?
The maximum junction temperature is 150 °C.
- What is the storage temperature range for the SN74HC259NSR?
The storage temperature range is from -65 °C to 150 °C.
- How much power does the SN74HC259NSR consume?
The maximum power consumption (ICC) is 80 μA.
- What is the output drive capability of the SN74HC259NSR at 5 V?
The output drive capability at 5 V is ±4 mA.
