Overview
The SN74HC259DR, produced by Texas Instruments, is an 8-bit addressable latch designed for general-purpose storage applications in digital systems. This device is part of the 74HC series and is known for its versatility and reliability. It can function as a working register, serial-holding register, or as an active-high decoder or demultiplexer. The SN74HC259DR is capable of storing single-line data in eight addressable latches and can be configured in four distinct functional modes by controlling the clear (CLR) and enable (G) inputs.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2 | 5 | 6 | V |
| Operating Temperature | -40 | 85 | °C | |
| High-Level Input Voltage (VIH) | 3.15 (at VCC = 4.5V) | 4.2 (at VCC = 6V) | V | |
| Low-Level Input Voltage (VIL) | 0.5 (at VCC = 2V) | 1.8 (at VCC = 6V) | V | |
| Output Current (IOH/IOL) | ±5.2 mA | mA | ||
| Propagation Delay Time (tpd) | 13 ns | ns | ||
| Package Type | SOIC-16 | |||
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
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 (tpd) 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 SN74HC259DR is suitable for various applications in digital systems, including:
- General-purpose storage applications
- Working registers
- Serial-holding registers
- Active-high decoders or demultiplexers
- 1-of-8 decoder or demultiplexer with active-high outputs
Q & A
- What is the operating voltage range of the SN74HC259DR?
The operating voltage range is from 2 V to 6 V.
- What is the maximum propagation delay time (tpd) of the SN74HC259DR?
The typical propagation delay time is 13 ns.
- What is the maximum output current (IOH/IOL) of the SN74HC259DR?
The maximum output current is ±5.2 mA.
- What package types are available for the SN74HC259DR?
The device is available in a 16-pin SOIC package.
- Is the SN74HC259DR RoHS compliant?
- What is the moisture sensitivity level (MSL) of the SN74HC259DR?
The MSL is 1 (unlimited).
- What are the primary applications of the SN74HC259DR?
The primary applications include general-purpose storage, working registers, serial-holding registers, and active-high decoders or demultiplexers.
- How many functional modes does the SN74HC259DR support?
The device supports four distinct functional modes.
- What is the typical power consumption of the SN74HC259DR?
The typical power consumption is 80 μA max ICC.
- Can the SN74HC259DR be used as a decoder or demultiplexer?
