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Nexperia USA Inc. 74LV138D,118
- Part No.:
- 74LV138D,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LV138D,118.pdf
- Description:
- IC DECODER/DEMUX 1 X 3:8 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
74LV138D,118 from Nexperia is a 3-to-8 line inverting decoder/demultiplexer with three active-LOW enable inputs (E1, E2) and one active-HIGH enable input (E3), operating across 1.0 V to 5.5 V supply range, delivering propagation delays as low as 12 ns at VCC = 3.3 V and CL = 15 pF, and supporting industrial temperature range (−40 °C to +125 °C); it is used for memory chip select decoding and address expansion in microcontroller peripheral interfaces.
For engineers reviewing the 74LV138D,118 datasheet, 74LV138D,118 pinout, 74LV138D,118 application, or 74LV138D,118 equivalent, key selection criteria include its dual-enable architecture for cascaded decoding, guaranteed operation down to 1.0 V, active-LOW mutually exclusive outputs, and SO16 package compatibility with legacy PCB footprints.
Technical Context
The 74LV138D implements standard TTL-compatible logic decoding with strict inverting output behavior: all eight outputs (Y0–Y7) remain HIGH unless E1 = LOW, E2 = LOW, and E3 = HIGH - only then does exactly one output go LOW based on A0–A2 binary input. Its enable hierarchy enables direct 1-of-32 expansion using four ICs and one external inverter.
Input clamping diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used; output drive capability supports ±6 mA at VCC = 3.0 V (VOL ≤ 0.40 V, VOH ≥ 2.4 V), and ground bounce remains under 0.8 V at 3.3 V/25 °C - critical for noise-sensitive digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0 V to 5.5 V - enables direct interface with 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| Propagation Delay (tpd) | 12 ns typical at VCC = 3.3 V, CL = 15 pF - ensures timing compliance in high-speed address decoding up to ~40 MHz clock-equivalent systems. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLCs, and extended-temperature embedded controllers. |
| Output Drive Strength | ±6 mA at VCC = 3.0 V - sufficient to directly drive multiple 74-series TTL inputs or small LED indicators without buffers. |
| Input Clamping Diodes | Integrated - permits safe connection of inputs to voltages > VCC (e.g., 5 V signals into 3.3 V system) when series resistors limit current to <20 mA. |
| Power Dissipation | 500 mW max at Tamb ≤ 110 °C (SO16) - supports sustained operation in compact enclosures with moderate airflow. |
| ESD Robustness | HBM > 2000 V, CDM > 1000 V - reduces risk of handling damage during manual assembly and board rework. |
Pinout & Package
74LV138D,118 is housed in a plastic small outline package (SO16), SOT109-1, with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch - compatible with IPC-7351B SOIC-16 footprint and automated SMT placement.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | A0, A1, A2 | Binary address inputs determining which single output (Y0–Y7) goes LOW when enabled. |
| 4, 5 | E1, E2 | Active-LOW enable inputs - both must be LOW for decoding to occur; used for hierarchical enable control. |
| 6 | E3 | Active-HIGH enable input - must be HIGH alongside E1/E2 LOW to activate decoder function. |
| 7, 9–15 | Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7 | Active-LOW decoded outputs - exactly one is LOW per valid address/enable combination; all others remain HIGH. |
| 8 | GND | Ground reference (0 V) for all internal circuitry and I/O signaling. |
| 16 | VCC | Primary power supply input - accepts 1.0 V to 5.5 V; decoupling capacitor required near pin for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.0–5.5 V) | Eliminates need for voltage translators in mixed-supply systems, e.g., interfacing 1.8 V FPGA I/O to 3.3 V memory subsystems. |
| Inverting active-LOW outputs | Directly drives common-cathode LED arrays or enables NMOS-based chip-select lines without external inverters. |
| Three enable inputs (E1, E2, E3) | Enables modular system design: E1/E2 serve as group selects, E3 acts as global strobe - simplifies multi-bank memory decoding. |
| Clamp diodes on all inputs | Permits robust interfacing to overvoltage sources (e.g., 5 V GPIO driving 3.3 V domain) using simple 1 kΩ series resistors. |
| Latch-up immunity >100 mA | Ensures reliability in noisy industrial environments where transient coupling or ESD events could otherwise trigger destructive latch-up. |
Applications
| Memory Address Decoding | Peripheral Select Logic |
|---|---|
Use Scenario: Selecting one of eight SRAM or Flash memory chips in a microcontroller-based data logger. IC Role / Device Role / Timing Role: 3-bit address decoder generating individual /CS signals; operates synchronously with CPU address bus transitions. Use Value: Reduces MCU GPIO count by replacing eight discrete enable lines with three address lines plus three enables - saving 5 pins and simplifying firmware. |
Use Scenario: Routing UART, SPI, or I²C peripherals to shared bus lines in an industrial gateway with expandable I/O modules. IC Role / Device Role / Timing Role: Demultiplexer converting a single enable strobe into eight isolated peripheral select lines; timing-critical path limited to 12 ns delay. Use Value: Enables hot-pluggable peripheral cards via standardized backplane addressing - each card responds only when its assigned Yn output is asserted. |
| 1-of-32 Decoder Expansion | LED Segment Driver Enable |
Use Scenario: Building a 5-to-32 line decoder for FPGA configuration memory mapping or FPGA I/O bank selection. IC Role / Device Role / Timing Role: One 74LV138D controls MSBs (A3,A4), enabling four parallel 74LV138Ds handling LSBs (A0–A2); total tpd ≤ 26 ns. Use Value: Achieves full 32-line decoding with minimal component count - only four ICs and one inverter - versus dedicated ASIC or CPLD solutions. |
Use Scenario: Driving eight 7-segment LED displays in multiplexed mode, where each display shares segment lines but requires individual digit enable. IC Role / Device Role / Timing Role: Digit select decoder asserting one Yn output per display cycle; outputs sink current directly into common-cathode LED anodes. Use Value: Eliminates need for eight discrete transistors or driver ICs - reduces BOM cost by 35% and PCB area by 40% vs. discrete transistor solution. |
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 |
|---|---|---|---|
| SN74LV138APWR | TI part in TSSOP-16 (SOT403-1); identical logic function and VCC range, but 10% higher typical tpd (13 ns @ 3.3 V) and lower max Ptot (350 mW). | Preferred for space-constrained PCBs due to smaller 4.4 mm body width; not drop-in compatible with SO16 footprints. | Select when board layout prioritizes density over thermal margin and existing SO16 land pattern is unavailable. |
| 74HC138D,653 | Nexperia HC variant; same pinout but narrower VCC range (2.0–6.0 V), higher propagation delay (21 ns @ 4.5 V), and no 1.0–1.8 V support. | Suitable for 5 V legacy systems only; cannot replace LV version in low-voltage (1.2–1.8 V) applications like modern SoC I/O expansion. | Choose only if system operates strictly at ≥2.0 V and cost is primary constraint - avoids LV-series premium pricing. |
Compared with SN74LV138APWR and 74HC138D,653, the 74LV138D,118 uniquely supports 1.0 V operation and delivers lowest propagation delay in SO16 packaging - making it optimal for battery-powered, low-power, and mixed-voltage embedded designs requiring legacy footprint compatibility.
Availability
74LV138D,118 is available at Aetrix Electronics and suitable for memory address decoding, peripheral select logic, 1-of-32 decoder expansion, and LED digit enable applications requiring stable component supply across automotive, industrial, and IoT product lifecycles.
Supply support for 74LV138D,118 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 leading Dutch semiconductor manufacturer specializing in high-performance, energy-efficient logic, analog, and MOSFET components - serving automotive, industrial, and consumer markets with AEC-Q100-qualified and industrial-grade products.
The 74LV logic family targets low-voltage, high-noise-immunity digital interfacing in mixed-supply systems, with design emphasis on wide VCC tolerance, robust ESD performance, and seamless integration into resource-constrained embedded platforms.
FAQ
Can 74LV138D,118 operate reliably at 1.2 V supply?
Yes - the device is fully specified down to 1.0 V supply voltage, with guaranteed functionality including VIH/VIL thresholds, propagation delay (75 ns max at VCC = 1.2 V), and output drive (VOH ≥ 0.9 V, VOL ≤ 0.3 V). It meets JESD8-7 (1.65–1.95 V) and JESD8-5 (2.3–2.7 V) standards, and operates across −40 °C to +125 °C at this voltage.
What is the maximum fan-out capability of 74LV138D,118 outputs?
Each output can source or sink up to ±6 mA at VCC = 3.0 V (VOL ≤ 0.40 V, VOH ≥ 2.4 V), supporting direct drive of up to 10 standard 74LVC inputs (each drawing ~1 μA) or two 74LS inputs (each requiring 20 μA LOW-level current). For heavier loads, external buffers are recommended.
Is the SO16 package (SOT109-1) RoHS and REACH compliant?
Yes - the 74LV138D,118 in SO16 packaging complies with EU RoHS Directive 2011/65/EU (Pb-free terminations, homogeneous material restrictions) and REACH Regulation (EC) No. 1907/2006 (SVHC screening). Nexperia's declaration of conformity is publicly available on their website under product documentation.
How does the enable input architecture support cascading multiple 74LV138D,118 ICs?
E1 and E2 are active-LOW enables; E3 is active-HIGH. To cascade, connect E1/E2 of subordinate decoders to one Yn output of a master decoder, and tie E3 HIGH. With four 74LV138D,118 ICs and one inverter, a full 5-to-32 decoder is built - where A4/A3 select the active IC, and A2/A1/A0 select the output within it.
74LV138D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LV
- 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:
- 12mA, 12mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74LV138D,118 FAQ
1.How can I place an order for 74LV138D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV138D,118 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 74LV138D,118 reliable?
The price and inventory of 74LV138D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV138D,118 is usually 5 days.
3.What payment methods are accepted for 74LV138D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV138D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV138D,118?
74LV138D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV138D,118 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 74LV138D,118?
For technical support, including 74LV138D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV138D,118 requirements.
6.How does Aetrix verify that 74LV138D,118 is sourced from the original manufacturer or authorized distributors?
All 74LV138D,118 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 74LV138D,118 meets industry standards.
7.What is the process for return or replacement of 74LV138D,118?
All 74LV138D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV138D,118, 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 74LV138D,118 part is unused and in its original packaging.
Return procedure for 74LV138D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LV138D,118 Tags
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SN74HC138DR
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TC7SB3157CFU,LF(CT
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74CBTLV3257PW,118
Nexperia USA Inc.
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74CBTLV3257GUX
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74HC154BQ,118
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P3S0200GMX
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SN74CB3Q3245PWR
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TCA9543APWR
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TCA9546APWR
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SN74HC138N
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