Overview
The SN74HC259NG4 is an 8-bit addressable latch produced by Texas Instruments. This integrated circuit is designed for general-purpose storage applications in digital systems. It features multiple functional modes, including addressable latch, memory, demultiplexer, and clear modes. The device is versatile and can be used in various configurations to suit different application needs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | - | 6 | V |
| ICC Supply Current (VCC = 6 V, IO = 0) | - | - | 80 | μA |
| IO Continuous Output Current | - | - | ±25 | mA |
| Input Current (VI = VCC or GND) | - | - | ±1 | μA |
| Propagation Delay Time (tpd) | 14 | - | 130 | ns |
| Output Drive at 5 V | - | ±4 | - | mA |
| Junction Temperature | - | - | 150 | °C |
| Storage Temperature | -65 | - | 150 | °C |
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 time 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, demultiplexer, and clear modes
Applications
- General-purpose storage applications in digital systems
- Working registers, serial-holding registers
- Active-high decoders or demultiplexers
- Up/down difference counting
- Shift right with parallel loading
- Communication systems
Q & A
- What is the operating voltage range of the SN74HC259NG4?
The operating voltage range is from 2 V to 6 V.
- What is the maximum ICC supply current at VCC = 6 V?
The maximum ICC supply current is 80 μA.
- What are the different functional modes of the SN74HC259NG4?
The device operates in four modes: addressable latch, memory, demultiplexer, and clear modes.
- What is the typical propagation delay time of the SN74HC259NG4?
The typical propagation delay time is 14 ns.
- How many LSTTL loads can the high-current inverting outputs drive?
The high-current inverting outputs can drive up to 10 LSTTL loads.
- What is the maximum junction temperature for the SN74HC259NG4?
The maximum junction temperature is 150 °C.
- Can the SN74HC259NG4 be used in communication systems?
Yes, it can be used in communication systems among other applications.
- What is the input current when VI = VCC or GND?
The input current is ±1 μA max when VI = VCC or GND.
- Does the SN74HC259NG4 support asynchronous parallel clear?
Yes, it supports asynchronous parallel clear.
- Is the SN74HC259NG4 expandable for n-bit applications?
Yes, it is expandable for n-bit applications.
