Overview
The SN74HC138PWRE4 is a 3-line to 8-line decoder/demultiplexer integrated circuit produced by Texas Instruments. It is designed for high-performance memory-decoding or data-routing applications that require very short propagation delay times. This device is particularly useful in high-speed memory systems where it can minimize the effects of system decoding, ensuring that the effective system delay introduced by the decoders is negligible when used with fast enable circuits and high-speed memories.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Series | 74HC |
| Type | Decoder/Demultiplexer |
| Circuit | 1 x 3:8 |
| Independent Circuits | 1 |
| Current - Output High, Low | 5.2mA, 5.2mA |
| Voltage Supply Source | Single Supply |
| Voltage - Supply | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
Key Features
- Targeted specifically for high-speed memory decoders and data-transmission systems.
- Wide operating voltage range (2 V to 6 V).
- Outputs can drive up to 10 LSTTL loads.
- Low power consumption, 80-µA maximum ICC.
- Typical propagation delay time (tpd) of 15 ns.
- ±4-mA output drive at 5 V.
- Low input current of 1-µA maximum.
- Active low outputs (selected output is low).
- Incorporate three enable inputs to simplify cascading or data reception.
Applications
- LED displays.
- Servers.
- White goods.
- Power infrastructure.
- Building automation.
- Factory automation.
- D/A converters.
- Implementing boolean functions with multiple variables.
- Data collection systems.
- Audio, video, and image transmission.
- Combinational circuits and logic gates for other digital devices).
Q & A
- What is the primary function of the SN74HC138PWRE4?
The SN74HC138PWRE4 is a 3-line to 8-line decoder/demultiplexer, designed for high-speed memory-decoding or data-routing applications.
- What is the operating voltage range of the SN74HC138PWRE4?
The operating voltage range is 2 V to 6 V.
- What is the typical propagation delay time (tpd) of the SN74HC138PWRE4?
The typical propagation delay time is 15 ns.
- How many LSTTL loads can the outputs of the SN74HC138PWRE4 drive?
The outputs can drive up to 10 LSTTL loads.
- What is the maximum power consumption of the SN74HC138PWRE4?
The maximum power consumption is 80-µA ICC.
- What are the output drive capabilities of the SN74HC138PWRE4 at 5 V?
The output drive is ±4-mA at 5 V.
- What is the input current of the SN74HC138PWRE4?
The input current is 1-µA maximum.
- What type of outputs does the SN74HC138PWRE4 have?
The outputs are active low (selected output is low).
- How many enable inputs does the SN74HC138PWRE4 have?
The device incorporates three enable inputs to simplify cascading or data reception.
- In what package is the SN74HC138PWRE4 available?
The device is available in a 16-TSSOP package (0.173", 4.40mm Width).
