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Texas Instruments SN74HC139APW
- Part No.:
- SN74HC139APW
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC139APW.pdf
- Description:
- DECODER/DEMULTIPLEXER DUAL 2-TO-
- Quantity:
- Payment:
- Shipping:
Inventory:13,050
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Product details
Overview
SN74HC139APW from NXP Semiconductors is a dual 2-to-4 line decoder/demultiplexer in TSSOP16 package, operating from 2.0 V to 6.0 V supply, with active-LOW mutually exclusive outputs, CMOS-level inputs, and −40 °C to +125 °C temperature range. It implements two independent decoders, each with enable input (nE), address inputs (nA0, nA1), and four active-LOW outputs (nY0–nY3), used for memory address decoding and data routing in digital logic systems.
For engineers reviewing the SN74HC139APW datasheet, SN74HC139APW pinout, SN74HC139APW application, or SN74HC139APW equivalent, this page delivers verified functional behavior, validated pin mapping for TSSOP16, confirmed static/dynamic timing across voltage/temperature, JEDEC-compliant ESD ratings, and real-world demultiplexing use cases - all specific to SN74HC139APW, not generic 74HC139 family variants.
Technical Context
The SN74HC139APW integrates two identical 2-to-4 decoders on one die, each accepting two binary address inputs and one active-LOW enable signal to drive four mutually exclusive active-LOW outputs. Its CMOS input structure includes clamp diodes enabling interface to voltages exceeding VCC via current-limiting resistors.
Propagation delays are specified per path: nAn → nYn (max 220 ns at 2.0 V, −40 °C to +125 °C) and nE → nYn (max 205 ns under same conditions); transition times remain below 110 ns. Static characteristics include VIH = 1.5 V (min) at VCC = 2.0 V and VOL = 0.4 V (max) at IO = 4.0 mA, VCC = 4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 6.0 V - supports wide-range logic interfacing including 3.3 V and 5 V systems without level shifters. |
| Operating Temperature | −40 °C to +125 °C - qualified for industrial and extended-temperature embedded control applications. |
| Output Type | Active-LOW, mutually exclusive - ensures only one output asserts LOW per decoder when enabled, preventing bus contention. |
| Propagation Delay | 11 ns (typ) at VCC = 6.0 V, 25 °C - enables reliable operation in high-speed address decoding up to ~45 MHz toggle rate. |
| Input Clamp Diodes | Integrated - allows safe interface to signals > VCC using external current-limiting resistors, simplifying mixed-voltage system design. |
| ESD Protection | HBM > 2000 V, MM > 200 V - meets JEDEC JESD22-A114F/A115-A, reducing need for external protection in board-level ESD zones. |
| Quiescent Current | 8.0 µA (max) at VCC = 6.0 V, 25 °C - supports low-power standby modes in battery-backed or energy-sensitive systems. |
Pinout & Package
TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width, 0.65 mm lead pitch, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1E, 2E | Active-LOW enable inputs - disable respective decoder and force all four outputs HIGH when asserted. |
| 2, 3 | 1A0, 1A1 | Binary address inputs for Decoder 1 - select one of four outputs (1Y0–1Y3) when 1E is LOW. |
| 4–7 | 1Y0–1Y3 | Active-LOW decoder outputs for Decoder 1 - only one asserts LOW per valid address; all HIGH when 1E is HIGH. |
| 8 | GND | Ground reference - must be connected to system 0 V plane; serves as return path for all internal logic and I/O currents. |
| 9–12 | 2Y0–2Y3 | Active-LOW decoder outputs for Decoder 2 - functionally identical to 1Y0–1Y3 but isolated from Decoder 1 logic. |
| 13, 14 | 2A0, 2A1 | Binary address inputs for Decoder 2 - operate independently from 1A0/1A1; support parallel decoding paths. |
| 16 | VCC | Positive supply - powers both decoders; must be decoupled locally with ≥100 nF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables simultaneous 2-to-4 decoding for separate address buses or control domains without shared timing constraints. |
| Demultiplexing capability | Enable input (nE) functions as data input - allows 1-to-4 demux operation by toggling nE while holding nA0/nA1 constant. |
| CMOS-level input compatibility | VIH = 1.5 V (min) at VCC = 2.0 V - ensures robust noise margin and direct interfacing with 3.3 V or 5 V microcontroller GPIOs. |
| JEDEC Std. 7A compliance | Guarantees interoperability with legacy 74-series logic families and standardized test methodologies across supply voltages. |
| Clamp diode protection | Permits overvoltage-tolerant input design - e.g., interfacing 5 V address lines to 3.3 V SN74HC139APW with single series resistor per input. |
Applications
| Memory Address Decoding | Data Routing in Industrial PLCs |
|---|---|
Use Scenario: Selecting one of four RAM or peripheral chip-select lines based on upper address bits in an 8-bit microcontroller system. IC Role / Device Role / Timing Role: SN74HC139APW acts as address-space partitioner - converts A0/A1 into four non-overlapping CS signals synchronized to address latch enable. Use Value: Eliminates discrete logic gates or larger CPLDs; reduces PCB area and routing complexity while maintaining deterministic 220 ns worst-case propagation delay. |
Use Scenario: Directing sensor data streams from four analog input modules to a single ADC channel under programmable control in a modular I/O rack. IC Role / Device Role / Timing Role: SN74HC139APW serves as synchronous analog multiplexer controller - its active-LOW outputs drive analog switch enable pins with precise timing alignment. Use Value: Enables zero-latency channel selection without software overhead; leverages built-in mutual exclusivity to prevent simultaneous analog path activation. |
| Code Conversion in Legacy Interfaces | LED Segment Enable Logic |
Use Scenario: Converting 2-bit BCD or status codes from an older microprocessor into four discrete control signals for relay drivers or indicator lamps. IC Role / Device Role / Timing Role: SN74HC139APW performs fixed-function code translation - maps binary inputs directly to dedicated output lines with no firmware involvement. Use Value: Provides deterministic, glitch-free output transitions (tt < 110 ns) critical for driving electromechanical relays without contact chatter. |
Use Scenario: Driving common-anode 7-segment displays where each digit requires individual segment-enable strobing in multiplexed display drivers. IC Role / Device Role / Timing Role: SN74HC139APW supplies four active-LOW digit-select signals - synchronized to segment data updates via microcontroller PWM timing. Use Value: Supports high-brightness multiplexing at >1 kHz refresh rates due to sub-30 ns typical propagation delay at 5 V, minimizing 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 |
|---|---|---|---|
| SN74HCT139PW | TTL-compatible inputs (VIH = 2.0 V min at VCC = 4.5–5.5 V); identical pinout and function. | Better suited for direct interface with legacy 5 V TTL logic; higher input current during switching. | Select SN74HCT139PW when interfacing with 74LS or other TTL-family devices; otherwise SN74HC139APW offers lower power and wider VCC range. |
| MC74HC139ADTR2G | Same HC logic family, identical electrical specs, but in TSSOP-16 (ON Semiconductor marking); RoHS-compliant, automotive-grade option. | Qualified per AEC-Q100 Grade 3 (−40 °C to +85 °C); not rated to +125 °C like SN74HC139APW. | Choose MC74HC139ADTR2G for automotive-qualified designs requiring same functionality; SN74HC139APW preferred for industrial +125 °C environments. |
Compared with SN74HCT139PW, SN74HC139APW provides broader supply voltage flexibility (2.0–6.0 V vs. 4.5–5.5 V) and lower quiescent current, while MC74HC139ADTR2G trades extended temperature rating for automotive qualification - making SN74HC139APW optimal for high-reliability industrial control where +125 °C operation is required.
Availability
SN74HC139APW is available at Aetrix Electronics and suitable for industrial control systems, programmable logic interfaces, and embedded memory expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74HC139APW 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
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in logic, interface, and power management ICs.
The SN74HC139APW belongs to NXP's 74HC logic family, designed for high-noise-immunity, low-power digital signal routing and decoding in resource-constrained embedded systems operating across wide voltage and temperature ranges.
FAQ
What is the maximum supply voltage rating for SN74HC139APW?
The absolute maximum supply voltage for SN74HC139APW is +7.0 V, but recommended operation is limited to 2.0 V to 6.0 V per Table 5. Operating continuously above 6.0 V risks permanent damage and violates JEDEC Std. 7A compliance. At 6.0 V, propagation delay improves to 11 ns (typ), and output drive strength increases to 5.2 mA sink capability.
Does SN74HC139APW support demultiplexing functionality?
Yes, SN74HC139APW supports 1-to-4 demultiplexing: the enable input (nE) serves as the data input, while address inputs (nA0, nA1) select the output line. When nE is LOW, the selected nYn output goes LOW; all others remain HIGH. This is explicitly confirmed in Section 1 and Figure 4 of the NXP datasheet.
What is the pinout compatibility between SN74HC139APW and SN74HCT139PW?
SN74HC139APW and SN74HCT139PW share identical TSSOP16 pinout (SOT403-1), pin-for-pin compatible across all 16 terminals. Both use the same pin numbering, signal names (1E, 1A0, 1Y0, etc.), and physical footprint - enabling direct substitution where input voltage thresholds align with system logic levels.
How does the input clamp diode feature benefit system design with SN74HC139APW?
The integrated input clamp diodes in SN74HC139APW allow safe interfacing to signals exceeding VCC - for example, connecting 5 V address lines to a 3.3 V-powered SN74HC139APW using a single 1 kΩ series resistor per input. This eliminates external clamping components and simplifies mixed-voltage board design while maintaining IEC 61000-4-2 ESD robustness.
Is SN74HC139APW qualified for automotive applications?
No, SN74HC139APW is not automotive-qualified. It is specified for −40 °C to +125 °C industrial operation but lacks AEC-Q100 certification. For automotive use, consider alternatives like MC74HC139ADTR2G (AEC-Q100 Grade 3) or SN74HC139QPWRQ1 (automotive-grade variant), which undergo additional stress testing and PPAP documentation.
SN74HC139APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 2
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74HC139APW FAQ
1.How can I place an order for SN74HC139APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC139APW 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 SN74HC139APW reliable?
The price and inventory of SN74HC139APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC139APW is usually 5 days.
3.What payment methods are accepted for SN74HC139APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC139APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC139APW?
SN74HC139APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC139APW 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 SN74HC139APW?
For technical support, including SN74HC139APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC139APW requirements.
6.How does Aetrix verify that SN74HC139APW is sourced from the original manufacturer or authorized distributors?
All SN74HC139APW 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 SN74HC139APW meets industry standards.
7.What is the process for return or replacement of SN74HC139APW?
All SN74HC139APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC139APW, 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 SN74HC139APW part is unused and in its original packaging.
Return procedure for SN74HC139APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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