Overview
The SN74HC139PWRE4, produced by Texas Instruments, is a dual 2-line to 4-line decoder/demultiplexer. This component is specifically designed for high-performance memory-decoding and data-routing applications that require very short propagation delay times. It features two individual 2-line to 4-line decoders in a single package, making it ideal for minimizing system decoding delays in high-speed memory systems.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2 | 5 | 6 | V |
| High-Level Input Voltage (VIH) | 1.5 (VCC=2V), 3.15 (VCC=4.5V), 4.2 (VCC=6V) | V | ||
| Low-Level Input Voltage (VIL) | 0.5 (VCC=2V), 1.35 (VCC=4.5V), 1.8 (VCC=6V) | V | ||
| Output Voltage (VOH) @ IOH=-20μA | 1.9 (VCC=2V), 4.4 (VCC=4.5V), 5.9 (VCC=6V) | V | ||
| Output Voltage (VOL) @ IOL=20μA | 0.1 | V | ||
| Propagation Delay Time (tpd) | 47 (VCC=2V), 14 (VCC=4.5V), 12 (VCC=6V) | ns | ||
| Operating Free-Air Temperature (TA) | -40 | 85 | °C | |
| Power Dissipation Capacitance per Decoder (Cpd) | 25 | pF |
Key Features
- Wide operating voltage range of 2 V to 6 V.
- Outputs can drive up to 10 LSTTL loads.
- Low power consumption, with a maximum ICC of 80 μA.
- Typical propagation delay time of 10 ns.
- ±4-mA output drive at 5 V.
- Low input current of 1 μA max.
- Incorporates two enable inputs to simplify cascading and/or data reception.
- Fully buffered inputs, each representing only one normalized load to its driving circuit.
Applications
- High-speed memory decoding systems.
- Data-routing applications requiring short propagation delay times.
- Demultiplexing applications where the active-low enable input can be used as a data line.
- High-performance digital systems where fast enable circuits are utilized.
Q & A
- What is the SN74HC139PWRE4 used for?
The SN74HC139PWRE4 is used for high-speed memory decoding and data-routing applications.
- What is the operating voltage range of the SN74HC139PWRE4?
The operating voltage range is from 2 V to 6 V.
- How many LSTTL loads can the outputs of the SN74HC139PWRE4 drive?
The outputs can drive up to 10 LSTTL loads.
- What is the typical propagation delay time of the SN74HC139PWRE4?
The typical propagation delay time is 10 ns.
- Does the SN74HC139PWRE4 have low power consumption?
- What is the output drive capability of the SN74HC139PWRE4 at 5 V?
The output drive capability is ±4 mA at 5 V.
- How many enable inputs does the SN74HC139PWRE4 have?
The device incorporates two enable inputs.
- What is the maximum junction temperature for the SN74HC139PWRE4?
The maximum junction temperature is 150°C.
- What is the storage temperature range for the SN74HC139PWRE4?
The storage temperature range is from -65°C to 150°C.
- What package options are available for the SN74HC139PWRE4?
Available packages include SOIC, SSOP, PDIP, SO, TSSOP, and others as specified in the datasheet.
