Overview
The SN74LV139A, specifically the SN74LVC139ADRG4, is a dual 2-line to 4-line decoder/demultiplexer produced by Texas Instruments. This device is designed for high-performance applications requiring short propagation delay times and is suitable for operation over a wide voltage range of 2V to 5.5V VCC. It is particularly useful in high-speed memory-decoding and data-routing systems, where its fast enable circuitry and low delay times are advantageous.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage Range) | 2 | 5.5 | V | |
| VI (Input Voltage Range) | -0.5 | 7 | V | |
| VO (Output Voltage Range) | -0.5 | VCC + 0.5 | V | |
| tpd (Propagation Delay Time) at VCC = 5V, CL = 15pF | 3.7 | 6.3 | 7.5 | ns |
| IOH (High-Level Output Current) at VCC = 5V | -12 | mA | ||
| IOL (Low-Level Output Current) at VCC = 5V | 12 | mA | ||
| TA (Operating Free-Air Temperature) | -40 | 85 | °C |
Key Features
- Operates over a wide voltage range of 2V to 5.5V VCC.
- Maximum propagation delay time of 7.5ns at 5V.
- Supports mixed-mode voltage operation on all ports.
- Designed for high-speed memory decoders and data-transmission systems.
- Incorporates two enable inputs to simplify cascading and/or data reception.
- Ioff supports partial-power-down mode operation.
- Latch-up performance exceeds 250mA per JESD 17.
- Fully buffered inputs, each representing only one normalized load to its driving circuit.
Applications
- High-performance memory-decoding systems.
- Data-routing applications requiring short propagation delay times.
- High-speed memory systems utilizing fast enable circuits.
- Demultiplexing applications where the active-low enable input can be used as a data line.
Q & A
- What is the voltage range for the SN74LV139A?
The SN74LV139A operates over a voltage range of 2V to 5.5V VCC.
- What is the maximum propagation delay time at 5V?
The maximum propagation delay time at 5V is 7.5ns.
- Does the SN74LV139A support mixed-mode voltage operation?
Yes, it supports mixed-mode voltage operation on all ports.
- What are the primary applications of the SN74LV139A?
The primary applications include high-performance memory-decoding and data-routing systems.
- How many enable inputs does the SN74LV139A have?
The device incorporates two enable inputs.
- What is the latch-up performance of the SN74LV139A?
The latch-up performance exceeds 250mA per JESD 17.
- Can the SN74LV139A be used in partial-power-down mode?
Yes, it supports partial-power-down mode operation through Ioff.
- What is the operating temperature range of the SN74LV139A?
The operating temperature range is from -40°C to 85°C.
- How many decoders are included in a single package of the SN74LV139A?
The device comprises two individual 2-line to 4-line decoders in a single package.
- What types of packages are available for the SN74LV139A?
The device is available in various packages including SOIC, SSOP, TVSOP, SOP, TSSOP, and VQFN.
