Overview
The SN74HC259DRG4 is an 8-bit addressable latch produced by Texas Instruments. It is designed for general-purpose storage applications in digital systems. This component is multifunctional, capable of storing single-line data in eight addressable latches and functioning as a 1-of-8 decoder or demultiplexer with active-high outputs. The device operates in four distinct modes controlled by the clear (CLR) and enable (G) inputs, making it versatile for various digital system needs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage Range | 2 | - | 6 | V |
| ICC (Quiescent Current) | - | 8 | 80 | μA |
| tPD (Propagation Delay) | 56 | 130 | 195 | ns |
| IOH (Output Current High) | -20 | -4 | -5.2 | mA |
| IOL (Output Current Low) | 20 | 4 | 5.2 | mA |
| TJ (Junction Temperature) | - | - | 150 | °C |
| Tstg (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, 80-μA max ICC
- 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
Applications
The SN74HC259DRG4 is suitable for various digital system applications, including:
- Working registers
- Serial-holding registers
- Active-high decoders or demultiplexers
- General-purpose storage applications
Q & A
- What is the operating voltage range of the SN74HC259DRG4?
The operating voltage range is from 2 V to 6 V.
- What is the maximum quiescent current (ICC) of the SN74HC259DRG4?
The maximum quiescent current is 80 μA.
- What is the typical propagation delay of the SN74HC259DRG4?
The typical propagation delay 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 function of the asynchronous parallel clear input?
The asynchronous parallel clear input allows all outputs to be cleared simultaneously without affecting the address and data inputs.
- Can the SN74HC259DRG4 be used as a decoder or demultiplexer?
- How many functional modes does the SN74HC259DRG4 have?
The device has four distinct functional modes controlled by the clear (CLR) and enable (G) inputs.
- What is the maximum junction temperature for the SN74HC259DRG4?
The maximum junction temperature is 150°C.
- What is the storage temperature range for the SN74HC259DRG4?
The storage temperature range is from -65°C to 150°C.
- What types of packages are available for the SN74HC259DRG4?
The device is available in various packages including SOIC, PDIP, TSSOP, and others.
