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Nexperia USA Inc. 74HCT139D,653
- Part No.:
- 74HCT139D,653
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT139D,653.pdf
- Description:
- IC DECODER/DEMUX 1 X 2:4 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,367
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Product details
Overview
74HCT139D,653 from Nexperia is a dual 2-to-4 line decoder/demultiplexer with TTL-compatible inputs, active-LOW outputs, and independent enable inputs per section. It operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient range, and delivers propagation delays as low as 13 ns (typ.) at VCC = 5.0 V with CL = 15 pF. It is used in memory address decoding and data routing within industrial control logic systems.
For engineers reviewing the 74HCT139D,653 datasheet, 74HCT139D,653 pinout, 74HCT139D,653 application, or 74HCT139D,653 equivalent, key selection criteria include TTL-level input compatibility, dual independent decode paths, active-LOW output drive capability, and SO16 package thermal performance up to +125 °C.
Technical Context
The device integrates two fully independent 2-to-4 decoders, each with dedicated address inputs (A0, A1), active-LOW enable (nE), and four active-LOW outputs (nY0–nY3). Outputs are mutually exclusive: only one is LOW per enabled decoder for any valid 2-bit input combination.
Enable inputs double as data inputs in demultiplexer mode; when nE is LOW, the addressed output mirrors the state of the corresponding address lines' decoded function. Input clamp diodes allow safe interfacing with voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL logic rails and stable operation across industrial voltage tolerances. |
| Propagation Delay | 13 ns (typ.) at VCC = 5.0 V, CL = 15 pF - enables use in high-speed address decoding for SRAM and peripheral selection up to ~30 MHz clock-equivalent timing. |
| Output Drive | ±4 mA (IOH/ IOL) - sufficient to directly drive multiple 74-series TTL inputs or small LED indicators without external buffers. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood industrial automation, motor control, and power supply management applications. |
| Input Thresholds | VIH = 2.0 V (min), VIL = 0.8 V (max) - guarantees reliable recognition of standard TTL logic levels across full temperature and voltage range. |
| Power Dissipation | CPD = 44 pF - determines dynamic power consumption; at 1 MHz switching, contributes ~1.1 mW per active input (PD = CPD × VCC² × fi). |
Pinout & Package
74HCT139D,653 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with standard JEDEC MS-012 footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1E, 2E - Enable inputs (active LOW) | Each controls one decoder section; HIGH disables all outputs (forces HIGH); LOW enables decoding/demux action. |
| 2, 3, 13, 14 | 1A0, 1A1, 2A0, 2A1 - Address inputs | Binary-select two outputs per decoder; A0 = LSB, A1 = MSB; unused inputs must be tied HIGH/LOW to prevent floating. |
| 4–7, 9–12 | 1Y0–1Y3, 2Y0–2Y3 - Outputs (active LOW) | Four mutually exclusive active-LOW outputs per decoder; only one LOW per enabled section for valid input codes. |
| 8 | GND | Ground reference for all internal circuitry and output loads; requires low-impedance connection to minimize noise coupling. |
| 16 | VCC | Positive supply rail; bypass capacitor (100 nF ceramic) recommended near pin for transient suppression during output switching. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Accepts standard 5 V TTL logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), eliminating level-shifting in mixed-logic systems. |
| Dual independent decoders | Two fully isolated 2-to-4 sections share no internal resources - enables concurrent address decoding for separate memory banks or peripherals. |
| Active-LOW demultiplexing | Enable pins serve as data inputs: asserting nE LOW routes the selected output to reflect the decoded state, supporting 1-to-4 signal distribution. |
| ESD robustness | HBM > 2000 V, CDM > 1000 V - withstands handling and board assembly stresses without protection circuitry overhead. |
| Wide temperature operation | Specified from -40 °C to +125 °C - validated for use in uncooled industrial enclosures and power electronics control modules. |
Applications
| Memory Address Decoding | Data Routing in PLC I/O Modules |
|---|---|
|
Use Scenario: Selecting one of four SRAM chips in a microcontroller-based data logger using 2-bit address lines. IC Role / Device Role: Dual decoder maps A1:A0 to chip-select signals (CS0–CS3), with separate enables isolating memory banks. Use Value: Reduces external logic count by integrating two decoders in one SO16 package, minimizing PCB area and interconnect delay. |
Use Scenario: Distributing a single digital control signal to four independent relay drivers in an industrial programmable logic controller. IC Role / Device Role: Configured as dual 1-to-4 demultiplexer using 1E/2E as data inputs and A1:A0 as channel selectors. Use Value: Enables time-multiplexed actuation of four output stages with precise timing control and no bus contention. |
| Code Conversion in Sensor Interface | Peripheral Selection in Embedded HMI |
|
Use Scenario: Converting 2-bit sensor status codes (e.g., fault level 0–3) into discrete LED driver enables on a front-panel display. IC Role / Device Role: Decoder outputs drive cathodes of four common-anode LEDs; active-LOW outputs match typical LED sink configurations. Use Value: Eliminates need for inverters or transistor drivers - direct interface reduces BOM cost and improves reliability. |
Use Scenario: Selecting between four UART-to-USB, CAN, SPI, or I²C bridge ICs based on host command in a field-configurable HMI unit. IC Role / Device Role: One decoder handles peripheral select; second decoder manages reset or configuration enable for the chosen interface. Use Value: Supports firmware-updatable peripheral mapping without hardware change - enhances product reuse across customer variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 2-to-4 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC139D,653 | CMOS input thresholds (VIH = 3.15 V min @ VCC = 4.5 V); higher noise margin but incompatible with pure TTL source drivers. | Requires CMOS-compatible upstream logic; unsuitable where legacy TTL outputs drive inputs directly. | Select when system uses 74HC/AC logic family or when higher noise immunity is prioritized over TTL interoperability. |
| SN74LS139DR | Bipolar TTL process; VIH = 2.0 V, VIL = 0.8 V same as 74HCT139, but slower (tpd ≈ 25 ns typ.), higher ICC (19 mA max), and narrower temp range (-40 °C to +85 °C). | Limited to commercial/industrial ambient ranges below +85 °C; not suitable for high-temp power control or automotive-adjacent environments. | Choose only for legacy board refresh where LS-family timing and loading behavior must be preserved; avoid for new designs targeting >85 °C operation. |
Compared with 74HC139D,653 and SN74LS139DR, the 74HCT139D,653 uniquely balances TTL input compatibility, +125 °C operation, and sub-15 ns propagation delay - making it optimal for modern industrial controllers requiring both legacy interface support and extended thermal resilience.
Availability
74HCT139D,653 is available at Aetrix Electronics and suitable for memory address decoding, industrial I/O multiplexing, sensor code translation, and embedded peripheral selection requiring stable component supply across extended temperature environments.
Supply support for 74HCT139D,653 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 MOSFET solutions optimized for efficiency-critical applications in automotive, industrial, and consumer markets.
The 74HCT series targets mixed-signal systems needing TTL-compatible CMOS logic - designed specifically to bridge legacy TTL interfaces with low-power, high-noise-immunity digital subsystems in ruggedized equipment.
FAQ
Can 74HCT139D,653 operate at 3.3 V?
No. The 74HCT139D,653 is specified only for 4.5 V to 5.5 V supply operation. Its TTL-compatible input thresholds require minimum 4.5 V VCC to guarantee VIH ≥ 2.0 V and proper recognition of HIGH inputs. Operation below 4.5 V risks incorrect decoding or metastability.
What happens when both enable inputs are HIGH?
When either 1E or 2E is HIGH, all four outputs of that decoder section are forced HIGH (inactive state). If both enables are HIGH, all eight outputs (1Y0–1Y3 and 2Y0–2Y3) remain HIGH regardless of address inputs - effectively disabling both decoders simultaneously.
Is the SO16 package RoHS compliant and lead-free?
Yes. The SOT109-1 package used for 74HCT139D,653 is RoHS-compliant and lead-free, meeting EU Directive 2011/65/EU and Nexperia's environmental specifications. Terminal finish is matte tin, and the device carries the "Pb-free" marking per JEDEC standards.
How does input clamping affect interfacing with 12 V signals?
Integrated input clamp diodes allow safe connection of voltages up to VCC + 0.5 V. To interface with 12 V signals, a series current-limiting resistor must be used to restrict IIK to ≤ ±20 mA - e.g., a 390 Ω resistor limits current to ~18 mA when VCC = 5 V and VIN = 12 V.
74HCT139D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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-SO
74HCT139D,653 FAQ
1.How can I place an order for 74HCT139D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT139D,653 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 74HCT139D,653 reliable?
The price and inventory of 74HCT139D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT139D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT139D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT139D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT139D,653?
74HCT139D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT139D,653 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 74HCT139D,653?
For technical support, including 74HCT139D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT139D,653 requirements.
6.How does Aetrix verify that 74HCT139D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT139D,653 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 74HCT139D,653 meets industry standards.
7.What is the process for return or replacement of 74HCT139D,653?
All 74HCT139D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT139D,653, 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 74HCT139D,653 part is unused and in its original packaging.
Return procedure for 74HCT139D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT139D,653 Tags
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