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Nexperia USA Inc. 74LVC138AD-Q100J
- Part No.:
- 74LVC138AD-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVC138AD-Q100J.pdf
- Description:
- IC DECODER/DEMUX 1 X 3:8 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,231
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Product details
Overview
74LVC138AD-Q100 from Nexperia is an automotive-grade 3-to-8 line decoder/demultiplexer with inverting outputs, featuring three binary address inputs (A0–A2), eight mutually exclusive active-low outputs (Y0–Y7), and three enable inputs (E1, E2 active LOW; E3 active HIGH). It operates across 1.2 V to 3.6 V supply, supports -40 °C to +125 °C ambient, and delivers propagation delay as low as 1.0 ns at 3.0–3.6 V - enabling precise memory chip select decoding in engine control units and ADAS domain controllers.
For engineers reviewing the 74LVC138AD-Q100 datasheet, 74LVC138AD-Q100 pinout, 74LVC138AD-Q100 application, or 74LVC138AD-Q100 equivalent, this device is selected for its AEC-Q100 Grade 1 qualification, overvoltage-tolerant 5.5 V inputs, Schmitt-trigger input hysteresis for noise immunity, and parallel expandability to 1-of-32 decoding using four ICs and one inverter.
Technical Context
The 74LVC138AD-Q100 implements a combinational logic decoder with strict mutual exclusivity: only one output goes LOW when E1=E2=LOW and E3=HIGH, while all others remain HIGH. Its enable architecture allows cascading via E1/E2/E3 to build larger decoding trees without external logic beyond a single inverter.
Input Schmitt triggers provide ≥0.35 V hysteresis at VCC = 2.3–2.7 V, ensuring robust operation with slow-rising signals from microcontrollers or sensors. Output drive capability supports direct termination into 50 Ω transmission lines at 125 °C, making it suitable for high-speed board-level signal routing in automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - enables direct interface with 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Operating Temperature | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood automotive applications. |
| Propagation Delay (tpd) | 1.0 ns (min) to 7.5 ns (max) at VCC = 3.0–3.6 V - ensures sub-8 ns timing margin for 100 MHz+ address strobing. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe interfacing with legacy 5 V microcontrollers or sensors in mixed-voltage systems. |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - sufficient to drive 50 Ω PCB traces directly at 125 °C without external buffers. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets automotive system-level ESD robustness requirements per ISO 10605. |
| Power Dissipation Capacitance | 21.1 pF at VCC = 3.0–3.6 V - enables accurate dynamic power estimation for thermal design in dense ECU layouts. |
Pinout & Package
74LVC138AD-Q100 is packaged in SO16 (SOT109-1): plastic small outline package, 16 leads, 3.9 mm body width, with gull-wing leads and standard JEDEC MS-012 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (A0, A1, A2) | Binary address input | Three-bit address selects exactly one of eight outputs; Schmitt-triggered for noise immunity on slow edges. |
| 4, 5 (E1, E2) | Enable input (active LOW) | Both must be LOW to activate decoding; used for hierarchical enable chaining in multi-chip systems. |
| 6 (E3) | Enable input (active HIGH) | Must be HIGH to enable outputs; complements E1/E2 for flexible 3-input gating logic. |
| 7–9, 10–15 (Y0–Y7) | Active-LOW decoded output | Only one output is LOW at any valid enable condition; all others remain HIGH - guarantees mutual exclusivity. |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and I/O; requires low-inductance PCB connection for signal integrity. |
| 16 (VCC) | Supply voltage | Primary power rail; decoupling capacitor (100 nF) required within 5 mm for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40 °C to +125 °C, including temperature cycling, HTOL, and ESD stress. |
| Overvoltage-tolerant inputs | Withstands up to 5.5 V regardless of VCC setting - eliminates need for external clamping diodes in 5 V ↔ 3.3 V interfaces. |
| Multiple enable architecture | E1/E2 (LOW-active) + E3 (HIGH-active) enables modular expansion to 1-of-32 decoding with minimal external components. |
| Schmitt-trigger inputs | Input hysteresis ≥0.35 V at mid-range VCC improves noise margin against crosstalk and ground bounce in high-density PCBs. |
| Direct 50 Ω transmission line drive | Output can terminate into 50 Ω loads at 125 °C - simplifies high-speed routing in ADAS sensor fusion modules. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Decoding microcontroller address bus to select among 8 flash memory banks or peripheral registers. IC Role / Device Role / Timing Role: Address decoder providing mutually exclusive chip-select signals with <8 ns propagation delay at 3.3 V. Use Value: Enables deterministic memory access timing critical for real-time fuel injection and ignition control loops. | Use Scenario: Routing sensor data streams from multiple radar/LiDAR front-ends to shared processing channels. IC Role / Device Role / Timing Role: Demultiplexer using E1 as data input and A0–A2 as channel address selectors. Use Value: Reduces interconnect complexity by replacing discrete logic gates with a single AEC-Q100-compliant IC. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Selecting among 8 CAN transceiver nodes or LIN bus peripherals based on MCU command. IC Role / Device Role / Timing Role: Enable-controlled decoder driving isolated enable lines with 5.5 V tolerant inputs. Use Value: Eliminates level-shifter ICs when interfacing 5 V legacy CAN controllers with 3.3 V domain MCUs. | Use Scenario: Managing audio codec, display driver, and USB PHY selection in multi-function infotainment SoC designs. IC Role / Device Role / Timing Role: Memory-mapped peripheral decoder with simultaneous enable validation across three inputs. Use Value: Guarantees no bus contention during hot-plug events due to strict mutual exclusivity and fast enable response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-to-8 decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV138AQPWRQ1 | TI part with identical pinout, same AEC-Q100 Grade 1 rating, but wider VCC range (1.65–5.5 V) and higher ICC (up to 20 μA vs. 10 μA typical). | Supports 5 V-only systems where 74LVC138AD-Q100's 3.6 V max VCC is limiting. | Select when legacy 5 V supply rails dominate and lower static current is not critical. |
| 74AHC138-Q100 | Nexperia variant with higher VCC range (2.0–5.5 V), faster tpd (0.8 ns min), but no 1.2 V operation and reduced overvoltage tolerance (5.0 V max). | Better suited for high-speed 5 V industrial PLCs than automotive low-voltage domains. | Choose for speed-critical non-automotive applications requiring >100 MHz address strobe rates. |
Compared with SN74LV138AQPWRQ1 and 74AHC138-Q100, the 74LVC138AD-Q100 uniquely balances ultra-low-voltage operation (1.2 V), automotive temperature range, and 5.5 V input tolerance - making it the only option for next-gen 1.2 V/1.8 V automotive MCUs interfacing with legacy 5 V peripherals.
Availability
74LVC138AD-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, body control modules, and infotainment head units requiring stable component supply across automotive production lifecycles.
Supply support for 74LVC138AD-Q100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on essential efficiency-enhancing components, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LVC138AD-Q100 belongs to Nexperia's automotive-qualified LVC logic family, designed specifically for low-voltage, high-noise-immunity decoding in safety-critical vehicle subsystems operating from -40 °C to +125 °C.
FAQ
What is the maximum clock frequency supported by the 74LVC138AD-Q100?
The 74LVC138AD-Q100 is a combinational logic device with no internal clock; its usable frequency depends on propagation delay and system timing margins. With tpd ≤ 7.5 ns at VCC = 3.0–3.6 V and -40 °C to +125 °C, it supports reliable address decoding up to ~100 MHz in well-designed PCB layouts with controlled impedance and proper decoupling.
Can the 74LVC138AD-Q100 be used as a demultiplexer, and how is that configured?
Yes - configure E1 (or E2) as the data input (driven LOW/HIGH), A0–A2 as the 3-bit channel address, and tie the remaining enables (E2/E3 or E1/E3) to fixed valid states. The selected Yn output mirrors the data input polarity (inverted), enabling 1-to-8 signal distribution in automotive sensor networks or display backlight control.
Does the 74LVC138AD-Q100 require external pull-up resistors on its outputs?
No - outputs are push-pull CMOS and actively drive both HIGH and LOW states. External pull-ups are unnecessary and may cause contention or excessive current draw when outputs switch. Only add termination resistors (e.g., 50 Ω to GND or VCC) if driving long transmission lines to prevent reflections.
Is the SO16 package (SOT109-1) of the 74LVC138AD-Q100 compatible with automated optical inspection (AOI)?
No - the standard SO16 (SOT109-1) lacks side-wettable flanks. For AOI-compatible assembly, specify the DHVQFN16 variant (74LVC138ABQ-Q100), which features exposed flank metallization enabling solder-joint inspection without X-ray. SO16 relies on post-reflow electrical test or X-ray for process validation.
74LVC138AD-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 3:8
- Independent Circuits:
- 1
- Current - Output High, Low:
- 24mA, 24mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74LVC138AD-Q100J FAQ
1.How can I place an order for 74LVC138AD-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC138AD-Q100J on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74LVC138AD-Q100J reliable?
The price and inventory of 74LVC138AD-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC138AD-Q100J is usually 5 days.
3.What payment methods are accepted for 74LVC138AD-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC138AD-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC138AD-Q100J?
74LVC138AD-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC138AD-Q100J order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74LVC138AD-Q100J?
For technical support, including 74LVC138AD-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC138AD-Q100J requirements.
6.How does Aetrix verify that 74LVC138AD-Q100J is sourced from the original manufacturer or authorized distributors?
All 74LVC138AD-Q100J products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74LVC138AD-Q100J meets industry standards.
7.What is the process for return or replacement of 74LVC138AD-Q100J?
All 74LVC138AD-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC138AD-Q100J, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74LVC138AD-Q100J part is unused and in its original packaging.
Return procedure for 74LVC138AD-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC138AD-Q100J Tags
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SN74HC138DR
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