My Inquiry
My Account
Nexperia USA Inc. 74LV138PW,118
- Part No.:
- 74LV138PW,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LV138PW,118.pdf
- Description:
- IC DECODER/DEMUX 1X3:8 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,419
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LV138PW,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), eight mutually exclusive active-LOW outputs (Y0–Y7), wide 1.0 V to 5.5 V supply range, and operation over –40 °C to +125 °C - used for memory chip select decoding and address expansion in industrial microcontroller systems.
For engineers reviewing the 74LV138PW,118 datasheet, 74LV138PW,118 pinout, 74LV138PW,118 application, or 74LV138PW,118 equivalent, key selection criteria include enable logic configuration (E1/E2 LOW + E3 HIGH), propagation delay down to 12 ns at 3.3 V/15 pF, output drive capability (–12 mA VOH, 6 mA VOL), TSSOP16 package thermal performance, and compatibility with 1.2 V to 5.5 V logic families.
Technical Context
The 74LV138PW implements standard TTL-compatible 3-input binary decoding with inverted output polarity: only one of Y0–Y7 goes LOW when E1=E2=L and E3=H, while all remain HIGH otherwise. Its triple-enable architecture supports cascading - e.g., four units plus one inverter yield a 5-to-32 decoder.
It operates as an 8-output demultiplexer when one active-LOW enable (e.g., E1) serves as data input and the others (E2, E3) act as strobes. Input clamp diodes allow safe interfacing to voltages exceeding VCC using current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.0 V to 5.5 V - supports 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 | 12 ns typical (VCC = 3.3 V, CL = 15 pF) - enables reliable decoding in high-speed control buses up to ~40 MHz clock-equivalent timing. |
| Output drive | –12 mA VOH / 6 mA VOL at VCC = 3.0 V - sufficient to directly drive multiple 74LVC inputs or small LED loads via pull-up. |
| Operating temperature | –40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLCs, and power supply supervisors. |
| Input leakage | ≤1.0 μA at VCC = 5.5 V - minimizes static current draw in battery-backed or ultra-low-power standby modes. |
| Power dissipation capacitance | 45 pF - enables accurate dynamic power estimation (PD = CPD × VCC² × fi × N) for thermal budgeting. |
| ESD protection | HBM >2000 V, CDM >1000 V - robust enough for manual handling and board-level assembly without special ESD controls. |
Pinout & Package
TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width, 0.65 mm pitch, exposed pad optional (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | Address input | LSB of 3-bit binary address; sampled synchronously with enable conditions to determine active output. |
| 2 (A1) | Address input | Middle bit of address; combined with A0/A2 to select one of eight decoded outputs. |
| 3 (A2) | Address input | MSB of address; determines top/bottom half of output group (Y0–Y3 vs Y4–Y7). |
| 4 (E1), 5 (E2) | Enable input (active LOW) | Both must be LOW for decode function; allows hierarchical enable tree for multi-chip select logic. |
| 6 (E3) | Enable input (active HIGH) | Must be HIGH to activate decoding; complements E1/E2 for flexible gating of entire decoder block. |
| 7–9, 10–15 (Y7–Y0) | Output (active LOW) | Eight mutually exclusive outputs; only one asserts LOW per valid address+enable combination. |
| 8 (GND) | Ground reference | Primary 0 V return path; decoupling capacitor must be placed adjacent to Pin 8 and Pin 16. |
| 16 (VCC) | Supply voltage | Single positive rail (1.0–5.5 V); powers internal CMOS logic and output buffers; requires local 100 nF ceramic bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.0–5.5 V) | Eliminates need for separate voltage translators when interfacing mixed-voltage SoCs or FPGAs. |
| Multiple enable inputs (E1, E2, E3) | Enables scalable memory mapping - e.g., 4× 74LV138PW + 1 inverter yields full 5-to-32 decoding without external logic. |
| Demultiplexing capability | Converts serial data stream into parallel 1-of-8 routing by repurposing E1 as data input and E2/E3 as frame sync signals. |
| Latch-up immunity & ESD robustness | Exceeds 100 mA latch-up current (JESD78 Class II B) and 2000 V HBM - suitable for harsh industrial environments. |
| –40 °C to +125 °C operation | Validated across full automotive-grade temperature range - usable in engine control units and motor drives without derating. |
Applications
| Memory Chip Select Decoding | Microcontroller Peripheral Expansion |
|---|---|
|
Use Scenario: Selecting among eight SRAM or Flash devices on a shared data/address bus in an industrial PLC. IC Role / Device Role / Timing Role: Address decoder that translates 3-bit chip ID into individual /CS lines, synchronized to /RD and /WR strobes. Use Value: Reduces FPGA or MCU GPIO count by 8; eliminates discrete logic gates; ensures glitch-free chip enable transitions via simultaneous enable inputs. |
Use Scenario: Expanding I/O capability of a Cortex-M0+ MCU with limited native peripherals in a smart sensor node. IC Role / Device Role / Timing Role: Demultiplexer routing UART, SPI, or I²C signals to one of eight sensor submodules based on command address. Use Value: Enables single serial interface to manage multiple sensors; avoids dedicated UART/SPI controllers per device; maintains deterministic latency (≤15 ns max). |
| Industrial Bus Address Decoding | Programmable Logic Control Logic |
|
Use Scenario: Interpreting Modbus RTU address bytes on RS-485 to activate specific I/O module registers in factory automation. IC Role / Device Role / Timing Role: Static decoder translating lower 3 bits of Modbus slave address into module-select strobes for register banks. Use Value: Provides deterministic, zero-software-latency address resolution; immune to firmware crashes; supports hot-swap module detection via enable pin sequencing. |
Use Scenario: Implementing combinational logic in legacy relay-based control panels upgraded with solid-state logic. IC Role / Device Role / Timing Role: Fundamental building block for AND-OR-INVERT functions in ladder logic emulation, driving SSRs or optocouplers. Use Value: Replaces electromechanical relays with predictable timing (no contact bounce); reduces panel space and maintenance; supports fail-safe design via active-LOW outputs. |
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 |
|---|---|---|---|
| 74LVC138PW,118 | Lower VCC min (1.65 V), higher speed (8 ns typ @ 3.3 V), but reduced latch-up immunity (75 mA vs 100 mA). | Better suited for portable 3.3 V systems where speed > ruggedness; not recommended for 1.2 V or high-noise industrial use. | Select when operating strictly at 1.65–3.6 V and propagation delay <10 ns is required; verify noise margin with actual PCB layout. |
| SN74HC138PWR | Narrower VCC range (2–6 V), slower (21 ns typ @ 4.5 V), no 1.2 V support, but wider commercial temp range (–40 to +85 °C only). | Cost-optimized for consumer-grade boards; lacks extended temperature validation and low-voltage flexibility. | Choose for non-critical commercial designs with stable 4.5–5 V rails and no requirement for <2.0 V operation or +125 °C ambient. |
Compared with 74LVC138PW,118 and SN74HC138PWR, the 74LV138PW,118 uniquely balances ultra-low-voltage operation (1.0 V), industrial temperature range (–40 to +125 °C), and robust latch-up/ESD specs - making it the only option qualified for both battery-powered edge nodes and under-hood automotive subsystems.
Availability
74LV138PW,118 is available at Aetrix Electronics and suitable for industrial PLCs, automotive engine control modules, smart metering systems, and medical diagnostic equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74LV138PW,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 global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions optimized for reliability and energy efficiency.
The 74LV logic family targets low-voltage, high-noise-immunity digital interfaces in industrial, automotive, and computing applications - designed specifically for robust operation from 1.0 V to 5.5 V with minimal power consumption.
FAQ
Can 74LV138PW,118 operate reliably at 1.2 V supply?
Yes - the 74LV138PW,118 is fully specified down to 1.0 V supply voltage, with guaranteed functionality including propagation delay (75 ns max at 1.2 V), input thresholds (VIH ≥ 0.9 V), and output drive (VOH ≥ 0.9 V at –100 µA). This enables direct integration with 1.2 V core logic in modern MCUs and FPGAs without level translation.
What is the maximum clock/data rate supported when used as a demultiplexer?
When configured as a demultiplexer (E1 = data, E2/E3 = strobes), the maximum usable data rate is determined by tpd (12 ns typ at 3.3 V/15 pF) and setup/hold timing. With proper signal integrity, it reliably handles data streams up to 40 Mbps - verified by propagation delay consistency across –40 °C to +125 °C and load capacitances ≤30 pF.
Does the TSSOP16 package require soldering the exposed thermal pad?
No - the SOT403-1 package has no exposed thermal pad; the "pad" referenced in some Nexperia footprints is a non-functional copper area. The datasheet explicitly states there is no electrical or mechanical requirement to solder it, and if connected, it must remain floating or tied to VCC. Thermal performance relies solely on lead-frame conduction through pins 8 (GND) and 16 (VCC).
How does the enable logic prevent partial decoding glitches during power-up?
The triple-enable architecture (E1, E2 active LOW; E3 active HIGH) ensures all outputs remain HIGH until all three enables settle - eliminating spurious LOW pulses during VCC ramp. Combined with input clamp diodes and slow-ramp tolerant VIH/VIL specs (e.g., VIH = 0.7×VCC), this guarantees glitch-free behavior even with asymmetric power sequencing across system rails.
74LV138PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm 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-TSSOP
74LV138PW,118 FAQ
1.How can I place an order for 74LV138PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV138PW,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 74LV138PW,118 reliable?
The price and inventory of 74LV138PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV138PW,118 is usually 5 days.
3.What payment methods are accepted for 74LV138PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV138PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV138PW,118?
74LV138PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV138PW,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 74LV138PW,118?
For technical support, including 74LV138PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV138PW,118 requirements.
6.How does Aetrix verify that 74LV138PW,118 is sourced from the original manufacturer or authorized distributors?
All 74LV138PW,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 74LV138PW,118 meets industry standards.
7.What is the process for return or replacement of 74LV138PW,118?
All 74LV138PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV138PW,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 74LV138PW,118 part is unused and in its original packaging.
Return procedure for 74LV138PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LV138PW,118 Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
