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Nexperia USA Inc. 74HCT139PW,118
- Part No.:
- 74HCT139PW,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT139PW,118.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,842
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Product details
Overview
74HCT139PW,118 from Nexperia is a dual 2-to-4 line decoder/demultiplexer in TSSOP16 package, operating at 4.5–5.5 V with TTL-compatible inputs and active-LOW mutually exclusive outputs. It features two independent decoders, each with dedicated enable (nE) and address (nA0/nA1) inputs, enabling memory address decoding and data routing in industrial control logic. Each decoder supports demultiplexing via its enable pin as data input.
For engineers reviewing the 74HCT139PW,118 datasheet, 74HCT139PW,118 pinout, 74HCT139PW,118 application, or 74HCT139PW,118 equivalent, key selection criteria include TTL-level input compatibility, -40 °C to +125 °C operation, propagation delay ≤51 ns at 4.5 V, active-LOW output drive capability, and TSSOP16 thermal performance with 8.5 mW/K derating above 91 °C.
Technical Context
The device implements two independent 2-to-4 binary decoders, each accepting two address bits (nA0, nA1) and one active-LOW enable (nE) to assert exactly one of four active-LOW outputs (nY0–nY3). Outputs are mutually exclusive and high-impedance when enabled is HIGH.
Input clamping diodes allow interface to voltages exceeding VCC using current-limiting resistors. Static and dynamic characteristics are fully specified across -40 °C to +125 °C, with VIH = 2.0 V (min), VOL = 0.4 V (max at 4 mA), tpd = 51 ns (max at 4.5 V, CL = 50 pF), and CPD = 44 pF for dynamic power estimation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL systems and stable operation under rail variation. |
| Input Logic Level | TTL-compatible - VIH ≥ 2.0 V, VIL ≤ 0.8 V - enables direct interfacing with legacy 5 V microcontrollers and logic families without level shifters. |
| Propagation Delay | ≤51 ns at VCC = 4.5 V, CL = 50 pF - supports reliable timing in address decoding up to ~10 MHz clock domains. |
| Output Drive | IO = ±4 mA - sufficient to drive multiple 74-series inputs or small LED loads with series resistor. |
| Operating Temperature | -40 °C to +125 °C - qualified for extended industrial environments including motor drives and power supply controllers. |
| Power Dissipation Cap. | 500 mW (TSSOP16), derates 8.5 mW/K above 91 °C - defines thermal design margin for sustained operation in compact PCB layouts. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets JEDEC JS-001/JS-002 Class 2/C3 for robust handling in automated assembly. |
Pinout & Package
TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, body width 4.4 mm, lead pitch 0.65 mm, optimized for high-density PCBs with improved thermal dissipation over SO16.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1E, 2E | Active-LOW enable inputs - each controls one decoder; tied HIGH disables all outputs (forces HIGH). |
| 2, 3, 13, 14 | 1A0, 1A1, 2A0, 2A1 | Binary address inputs - select one of four outputs per decoder; CMOS/TTL compatible thresholds. |
| 4–7, 9–12 | 1Y0–1Y3, 2Y0–2Y3 | Active-LOW decoded outputs - only one asserted per enabled decoder; sink current up to 4 mA. |
| 8 | GND | Ground reference - return path for all internal logic and output currents; must be low-impedance. |
| 16 | VCC | Positive supply - powers both decoders; bypass capacitor (100 nF) recommended near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables simultaneous 2-bit address decoding for two memory banks or peripheral groups without shared timing constraints. |
| Enable-as-data demultiplexing | Each nE pin accepts serial data while nA0/nA1 select output channel - implements 1-to-4 demux without external gating. |
| Input clamp diodes | Permits safe interfacing to signals up to VCC + 0.5 V using series resistors - eliminates need for external protection in mixed-voltage systems. |
| Wide temperature range | Specified from -40 °C to +125 °C - supports deployment in under-hood automotive ECUs and industrial PLC backplanes. |
| Low quiescent current | ICC ≤ 160 μA at 5.5 V, full temperature range - minimizes standby power in battery-backed or energy-sensitive systems. |
Applications
| Memory Address Decoding | Industrial I/O Expansion |
|---|---|
Use Scenario: Selecting one of four SRAM or EEPROM chips on a microcontroller bus using A0/A1 address lines. IC Role / Device Role / Timing Role: Dual decoder maps 2-bit address + chip-enable signal to four discrete /CS lines; propagation delay <51 ns ensures setup/hold compliance at 10 MHz bus clocks. Use Value: Eliminates need for discrete logic gates or larger PLDs, reducing BOM count and layout area while maintaining deterministic decode timing. |
Use Scenario: Routing a single digital control signal to one of four solenoid drivers in a programmable logic controller output module. IC Role / Device Role / Timing Role: Acts as 1-to-4 demultiplexer using nE as data input and nA0/nA1 as channel select; active-LOW outputs directly interface with N-channel MOSFET gate drivers. Use Value: Provides galvanically isolated channel selection without optocouplers or relay drivers, cutting response latency to <51 ns and component cost by 40% vs discrete solutions. |
| Legacy System Bus Interface | LED Segment Select Logic |
Use Scenario: Adapting a vintage 8-bit CPU's 2-bit I/O port to control four separate peripheral registers via /IORQ strobe. IC Role / Device Role / Timing Role: Decoder interprets port bits as register address while /IORQ serves as synchronized nE - ensures glitch-free register access during bus cycles. Use Value: Enables drop-in replacement of obsolete 74LS139 in retro-computing restoration projects with identical pinout and improved noise immunity. |
Use Scenario: Driving common-anode 7-segment displays where each decoder output selects one digit via PNP transistor base control. IC Role / Device Role / Timing Role: Active-LOW outputs sink current through segment resistors; TTL-level inputs accept direct connection to FPGA GPIO pins without pull-ups. Use Value: Reduces segment driver complexity by 75% versus individual transistors per digit, while supporting multiplex rates up to 2 kHz without visible flicker. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 2-to-4 decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT139D,653 | SO16 package (SOT109-1), wider body (3.9 mm), higher thermal resistance (12.4 mW/K derating above 110 °C) | Better suited for through-hole prototyping or legacy board rework where TSSOP footprint unavailable | Select when mechanical compatibility with existing SO16 footprints or manual soldering is required. |
| SN74HCT139N | DIP-16 package, no surface-mount thermal performance, rated only to +70 °C ambient | Limited to lab evaluation or low-power consumer electronics; not qualified for industrial temperature range | Choose only for breadboard validation or non-critical educational use - avoid in production designs requiring -40 °C to +125 °C operation. |
Compared with 74HCT139PW,118, the SO16 variant offers easier hand-soldering but lower power density, while the DIP version sacrifices temperature rating and modern manufacturability - the TSSOP16 delivers optimal balance of thermal performance, board space efficiency, and industrial qualification.
Availability
74HCT139PW,118 is available at Aetrix Electronics and suitable for industrial control logic, memory address decoding, and I/O expansion systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT139PW,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 delivering high-performance, reliable logic, analog, and discrete components with focus on efficiency, reliability, and sustainability.
The 74HCT139 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically for TTL-compatible interfacing in industrial, automotive, and computing applications demanding robustness and wide temperature operation.
FAQ
Can 74HCT139PW,118 operate at 3.3 V supply?
No. The 74HCT139PW,118 is specified only for 4.5 V to 5.5 V operation per its Recommended Operating Conditions table. At 3.3 V, input thresholds (VIH ≥ 2.0 V) remain valid, but VOH and VOL degrade beyond specification, and propagation delay increases significantly. For 3.3 V systems, use the 74LVC139 or 74AHC139 instead.
What is the maximum capacitive load this device can drive reliably?
The 74HCT139PW,118 is characterized with CL = 50 pF in dynamic testing, and its transition time (tt ≤ 22 ns) and output drive (±4 mA) support stable operation into ≤75 pF loads. Exceeding 75 pF risks timing violations and increased EMI; for heavier loads, add a buffer stage or reduce trace length and capacitance.
Are the two decoders electrically isolated within the same package?
Yes. The two decoders share only VCC and GND rails; their address inputs (1A0/1A1, 2A0/2A1), enable inputs (1E, 2E), and outputs (1Y0–1Y3, 2Y0–2Y3) are fully independent. No internal coupling exists between decoder sections - crosstalk is limited to substrate noise, mitigated by proper PCB grounding.
Does this part support hot insertion or live swapping?
No. The 74HCT139PW,118 lacks hot-swap protection circuitry such as power-up sequencing control or Ioff (power-off protection). Applying VCC while inputs are driven can cause latch-up or excessive current due to internal parasitic paths. Always power VCC before applying input signals during system initialization.
74HCT139PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 2
- Current - Output High, Low:
- 4mA, 4mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74HCT139PW,118 FAQ
1.How can I place an order for 74HCT139PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT139PW,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 74HCT139PW,118 reliable?
The price and inventory of 74HCT139PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT139PW,118 is usually 5 days.
3.What payment methods are accepted for 74HCT139PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT139PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT139PW,118?
74HCT139PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT139PW,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 74HCT139PW,118?
For technical support, including 74HCT139PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT139PW,118 requirements.
6.How does Aetrix verify that 74HCT139PW,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT139PW,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 74HCT139PW,118 meets industry standards.
7.What is the process for return or replacement of 74HCT139PW,118?
All 74HCT139PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT139PW,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 74HCT139PW,118 part is unused and in its original packaging.
Return procedure for 74HCT139PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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