Overview
The SN74LVC138ARSVR, produced by Texas Instruments, is a 3-line to 8-line decoder/demultiplexer integrated circuit. This device is part of the LVC (Low-Voltage CMOS) family and is designed for high-performance memory-decoding or data-routing applications that require very short propagation delay times. It operates within a wide voltage range from 1.65 V to 3.6 V, making it versatile for various system environments, including mixed 3.3-V/5-V systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | UQFN (RSV) | |
| Number of Pins | 16 | |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 1.65 to 3.6 | V |
| Maximum Propagation Delay Time @ Maximum CL | 5.8 ns at 3.3 V | ns |
| Maximum High Level Output Current | 24 mA | mA |
| Maximum Low Level Output Current | -24 mA | mA |
| ESD Protection | 2000 V (MIL-STD-883, Method 3015) | V |
| Input Voltage Range | 0 to 5.5 V | V |
| Quiescent Current @ Nominal Voltage (Max) | 0.01 mA | mA |
Key Features
- Operates from 1.65 V to 3.6 V, with inputs accepting voltages up to 5.5 V.
- Maximum propagation delay of 5.8 ns at 3.3 V, making it suitable for high-performance applications.
- Typical output ground bounce (VOLP) < 0.8 V and output VOH undershoot > 2 V at VCC = 3.3 V, TA = 25°C.
- Latch-up performance exceeds 250 mA per JESD 17.
- ESD protection exceeds 2000 V per MIL-STD-883, Method 3015, and 200 V using the machine model.
- Two active-low enable inputs and one active-high enable input, reducing the need for external gates or inverters.
Applications
The SN74LVC138ARSVR is designed for high-performance memory-decoding or data-routing applications. It is particularly useful in high-speed memory systems where it minimizes the effects of system decoding. This device can be employed with fast enable circuits in memory systems, ensuring that the delay times of the decoder and the enable time of the memory are less than the typical access time of the memory. This makes the effective system delay introduced by the decoder negligible.
Additionally, it can be used in mixed 3.3-V/5-V system environments, acting as a translator between different voltage levels.
Q & A
- What is the operating voltage range of the SN74LVC138ARSVR?
The device operates from 1.65 V to 3.6 V.
- What is the maximum propagation delay time at 3.3 V?
The maximum propagation delay time at 3.3 V is 5.8 ns.
- What is the ESD protection level of the SN74LVC138ARSVR?
The ESD protection exceeds 2000 V per MIL-STD-883, Method 3015, and 200 V using the machine model.
- Can the inputs be driven from 5-V devices?
Yes, the inputs can be driven from either 3.3-V or 5-V devices.
- What is the typical output ground bounce (VOLP) at VCC = 3.3 V, TA = 25°C?
The typical output ground bounce (VOLP) is less than 0.8 V at VCC = 3.3 V, TA = 25°C.
- What is the latch-up performance of the SN74LVC138ARSVR?
The latch-up performance exceeds 250 mA per JESD 17.
- What is the package type and number of pins for the SN74LVC138ARSVR?
The package type is UQFN (RSV) with 16 pins.
- What is the operating temperature range of the SN74LVC138ARSVR?
The operating temperature range is -40°C to 85°C.
- Can the SN74LVC138ARSVR be used in mixed voltage systems?
Yes, it can be used in mixed 3.3-V/5-V system environments.
- What are the typical high and low level output currents at VCC = 3.3 V?
The typical high level output current is -24 mA and the low level output current is 24 mA at VCC = 3.3 V.
