Overview
The 74LVC138APW/AU118, produced by NXP USA Inc. (now part of Nexperia), is a high-performance, low-power, low-voltage, Si-gate CMOS 3-to-8 line decoder/demultiplexer. This device decodes three binary weighted address inputs (A0, A1, and A2) to eight mutually exclusive outputs (Y0 to Y7). It features three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3), allowing for easy parallel expansion and demultiplexing capabilities. The 74LVC138APW/AU118 is designed for use in mixed 3.3 V and 5 V environments and is compatible with TTL levels.
Key Specifications
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|
| 74LVC138APW | 1.2 - 3.6 | CMOS/LVTTL | ± 24 | 2.7 | Low | -40 ~ 125 | 126 | 4.8 | 55.9 | TSSOP16 |
Key Features
- Wide supply voltage range from 1.2 V to 3.6 V
- CMOS low power consumption
- Direct interface with TTL levels
- Inputs accept voltages up to 5.5 V
- Demultiplexing capability
- Multiple input enable for easy expansion
- Ideal for memory chip select decoding
- Active LOW mutually exclusive outputs
- Output drive capability for 50 Ω transmission lines at 125 °C
- Complies with JEDEC standards (JESD8-7A, JESD8-5A, JESD8-C/JESD36)
- ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V
- Schmitt-trigger action at all inputs for tolerance of slower input rise and fall times
Applications
- Memory chip select decoding
- Data-routing applications
- Mixed 3.3 V and 5 V environments
- High-performance, low-power logic circuits
- Demultiplexing and decoding in digital systems
Q & A
- What is the primary function of the 74LVC138APW/AU118?
The primary function is to decode three binary weighted address inputs to eight mutually exclusive outputs, and it can also be used as a demultiplexer.
- What is the supply voltage range for the 74LVC138APW/AU118?
The supply voltage range is from 1.2 V to 3.6 V.
- How many enable inputs does the 74LVC138APW/AU118 have?
It has three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3).
- What is the output drive capability of the 74LVC138APW/AU118?
The output drive capability is ±24 mA, and it can drive 50 Ω transmission lines at 125 °C.
- Is the 74LVC138APW/AU118 compatible with TTL levels?
- What is the operating temperature range for the 74LVC138APW/AU118?
The operating temperature range is from -40 °C to +125 °C.
- Does the 74LVC138APW/AU118 have ESD protection?
- What package type is the 74LVC138APW/AU118 available in?
- Can the 74LVC138APW/AU118 be used in mixed voltage environments?
- What JEDEC standards does the 74LVC138APW/AU118 comply with?
