Overview
The SN74LVC138APWR is a 3-line to 8-line decoder/demultiplexer designed by Texas Instruments for high-performance memory-decoding or data-routing applications. This device is optimized for very short propagation delay times, making it ideal for use in high-performance memory systems. When used with high-speed memories and a fast enable circuit, the delay times introduced by the decoder are typically negligible compared to the memory's access time.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 1.65 | 3.6 | V | |
| Input Voltage Range | 0 | 5.5 | V | |
| Operating Temperature Range | -40 | 85 | °C | |
| Propagation Delay Time (tpd) at VCC = 3.3 V, CL = 15 pF | 8.1 | 11.4 | 13.5 | ns |
| Output Low-Level Voltage (VOL) at IOL = 50 μA | 0.1 | 0.4 | V | |
| Output High-Level Voltage (VOH) at IOH = -12 mA | 2.4 | V | ||
| Input Current (II) at VI = 5.5 V or GND | ±1 | μA | ||
| Supply Current (ICC) at VI = VCC or GND, IO = 0 | 20 | μA | ||
| Input Capacitance (Ci) at VI = VCC or GND | 2.1 | pF |
Key Features
- Operates from 1.65 V to 3.6 V.
- Inputs accept voltages up to 5.5 V.
- Maximum propagation delay time of 5.8 ns at VCC = 3.3 V.
- Typical output ground bounce (VOLP) < 0.8 V at VCC = 3.3 V, TA = 25°C.
- Typical output VOH undershoot (VOHV) > 2 V at VCC = 3.3 V, TA = 25°C.
- Latch-up performance exceeds 250 mA per JESD 17.
- Supports mixed-mode voltage operation on all ports.
- Ioff supports partial-power-down mode operation.
Applications
- Output expansion.
- LED matrix control.
- 7-segment display control.
- 8-bit data storage.
Q & A
- What is the primary function of the SN74LVC138APWR? The SN74LVC138APWR is a 3-line to 8-line decoder/demultiplexer designed for high-performance memory-decoding or data-routing applications.
- What is the operating voltage range of the SN74LVC138APWR? The device operates from 1.65 V to 3.6 V.
- What is the maximum propagation delay time at VCC = 3.3 V? The maximum propagation delay time is 5.8 ns at VCC = 3.3 V.
- What is the typical output ground bounce (VOLP) at VCC = 3.3 V? The typical output ground bounce is less than 0.8 V at VCC = 3.3 V, TA = 25°C.
- Does the SN74LVC138APWR support mixed-mode voltage operation? Yes, it supports mixed-mode voltage operation on all ports.
- What are some common applications of the SN74LVC138APWR? Common applications include output expansion, LED matrix control, 7-segment display control, and 8-bit data storage.
- What is the operating temperature range of the SN74LVC138APWR? The operating temperature range is -40°C to 85°C.
- How many output lines does the SN74LVC138APWR have? The device has eight output lines.
- Does the SN74LVC138APWR have latch-up protection? Yes, the latch-up performance exceeds 250 mA per JESD 17.
- What is the package type of the SN74LVC138APWR? The device is available in a 16-pin TSSOP package.
