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onsemi MC14049UBFL1
- Part No.:
- MC14049UBFL1
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
MC14049UBFL1.pdf
- Description:
- IC INVERTER
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Product details
Overview
MC14049UBFL1 from ON Semiconductor is a hex inverting buffer IC constructed with complementary MOS (CMOS) P- and N-channel enhancement-mode devices, designed for logic-level translation, high-noise-immunity signal conditioning, and CMOS-to-TTL/DTL interfacing. It operates from 3.0 V to 18 V, supports input voltages exceeding VDD, delivers ±45 mA output sink/source capability per pin, and features unconnected pins 13 and 16. It is used in industrial control I/O buffering and legacy system voltage translation.
For engineers reviewing the MC14049UBFL1 datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, validated pin mapping, confirmed supply and interface specifications, real-world noise immunity and level-shifting behavior, and two technically documented alternative parts for design continuity.
Technical Context
The MC14049UBFL1 implements six independent CMOS inverter/buffer stages in a single monolithic structure, each capable of bidirectional logic-level conversion without requiring dual supplies. Its input stage accepts VIH up to 18 V regardless of VDD, enabling robust interfacing between disparate logic families.
It exhibits rail-to-rail output swing (VOH ≥ VDD – 0.05 V, VOL ≤ 0.05 V at VDD = 5–15 V), supports dynamic loading up to 50 pF per output, and maintains stable quiescent current (IDD ≤ 4.0 µA at VDD = 15 V, TA = 25°C). Propagation delays range from 10 ns to 120 ns depending on VDD and load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 18 V - Enables operation across wide industrial and legacy logic rails without external regulators. |
| Input Voltage Range | –0.5 V to +18.0 V - Allows inputs to exceed VDD, supporting true level-shifting from higher-voltage sources. |
| Output Sink Current | ≥ 30 mA at VDD = 15 V, VOL = 1.5 V - Drives two TTL/DTL loads directly when VDD = 5 V and VOL ≤ 0.4 V. |
| Output Source Current | ≥ –4.7 mA at VDD = 15 V, VOH = 13.5 V - Sustains logic-high drive into capacitive or resistive loads under high-VDD conditions. |
| Propagation Delay | 30 ns to 120 ns (VDD = 5–15 V, CL = 50 pF) - Predictable timing for synchronous bus buffering and clock distribution. |
| Quiescent Current | ≤ 4.0 µA at VDD = 15 V, TA = 25°C - Supports ultra-low-power standby modes in battery-backed systems. |
| ESD Protection | Improved ESD protection on all inputs - Enhances reliability in handling-sensitive industrial environments. |
Pinout & Package
MC14049UBFL1 is supplied in a 16-pin SOIC package (Case 751B), with 1.27 mm pitch, body size 10.0 × 4.0 mm, and standard JEDEC-compliant footprint. Pins 13 and 16 are internally unconnected (NC); no external connection is required or recommended.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply rail - Must be decoupled locally; supports 3.0–18 V operation. |
| 2 | INA | Inverter A input - Accepts logic signals up to 18 V, independent of VDD. |
| 3 | OUTA | Inverter A output - Provides full-rail CMOS output swing referenced to VDD/VSS. |
| 4 | INB | Inverter B input - Electrically identical to INA; unused inputs must be tied to VDD or VSS. |
| 5 | OUTB | Inverter B output - Independent stage; no internal coupling to other outputs. |
| 6 | INC | Inverter C input - One of six buffered inverter inputs; high-impedance CMOS node. |
| 7 | OUTC | Inverter C output - Capable of sourcing/sinking up to ±45 mA transiently. |
| 8 | VSS | Ground reference - All voltages referenced to this pin; must be low-impedance return path. |
| 9 | IND | Inverter D input - Matches electrical specs of other inputs; VIH > VDD supported. |
| 10 | OUTD | Inverter D output - Validated for driving TTL/DTL loads when VDD = 5 V. |
| 11 | INE | Inverter E input - Internally identical; requires termination if unused. |
| 12 | OUTE | Inverter E output - Meets JEDEC UB specification for propagation delay and noise margin. |
| 13 | NC | No connection - Not bonded; floating or connected externally has no effect on operation. |
| 14 | INF | Inverter F input - Final input channel; same VIH/VIL thresholds as others. |
| 15 | OUTF | Inverter F output - Fully specified for VOL ≤ 0.05 V and VOH ≥ VDD – 0.05 V. |
| 16 | NC | No connection - Internally open; no routing or PCB trace required. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply level shifting | Accepts input high levels up to 18 V while operating from VDD = 3–18 V - eliminates need for external level translators. |
| Rail-to-rail output swing | VOH ≥ VDD – 0.05 V and VOL ≤ 0.05 V across full VDD and temperature range - ensures reliable logic interpretation by downstream receivers. |
| High noise immunity | Guaranteed VIL ≤ 2.5 V and VIH ≥ 12.5 V at VDD = 15 V - rejects >5 V of common-mode noise on input lines. |
| Low quiescent power | ID D ≤ 4.0 µA at VDD = 15 V - enables use in always-on monitoring circuits without significant standby drain. |
| TTL/DTL compatibility | Drives two standard TTL loads at VDD = 5 V with VOL ≤ 0.4 V and IOL ≥ 3.2 mA - supports direct interface to legacy logic without pull-up resistors. |
Applications
| Industrial PLC I/O Buffering | Legacy System Voltage Translation |
|---|---|
Use Scenario: Isolating and translating sensor signals from 12 V industrial field buses into 5 V microcontroller inputs. IC Role / Device Role / Timing Role: Hex inverting buffer providing level-shifted, noise-immune digital signal conditioning with no external bias components. Use Value: Eliminates discrete resistor networks and reduces board space while maintaining >2.5 V noise margin at 12 V input. |
Use Scenario: Interfacing vintage 12 V TTL peripherals with modern 3.3 V or 5 V FPGA I/O banks. IC Role / Device Role / Timing Role: Unidirectional CMOS inverter acting as a high-VIH translator, accepting 12 V inputs while outputting clean 0–VDD logic levels. Use Value: Enables drop-in replacement of obsolete translators without redesigning power domains or adding level-shifter ICs. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
Use Scenario: Driving multiple relay coils or LED indicators from a low-current MCU GPIO in 12 V automotive subsystems. IC Role / Device Role / Timing Role: High-sink-current inverting buffer delivering up to 30 mA per output at 12 V supply. Use Value: Reduces component count versus discrete transistor drivers while ensuring fast turn-off via active pull-down. |
Use Scenario: Cleaning up noisy or slow-rising clock and control signals in automated test fixtures before feeding to DUTs. IC Role / Device Role / Timing Role: Six independent Schmitt-trigger-free buffers reshaping edges and restoring logic margins. Use Value: Improves signal integrity without introducing hysteresis-induced timing uncertainty in deterministic test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverter/buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4049UBE | Same pinout and function but lower max output current (IOL = 4.2 mA typical at VDD = 5 V vs. 30 mA for MC14049UBFL1); no guaranteed VIH > VDD. | Not suitable for driving TTL loads or high-VIH translation; limited to low-fanout CMOS-only systems. | Select CD4049UBE only when power budget is tighter and load drive requirements are minimal. |
| 74HC04PW | Higher speed (tPD ≈ 8 ns), but narrower VDD range (2–6 V), no VIH > VDD support, and lower absolute output current (IOL = 4 mA at VDD = 6 V). | Cannot replace MC14049UBFL1 in 12 V or 15 V systems or where input overvoltage tolerance is required. | Choose 74HC04PW only for high-speed, low-voltage (≤6 V) digital logic where level shifting is unnecessary. |
Compared with CD4049UBE and 74HC04PW, MC14049UBFL1 uniquely combines wide supply range (3–18 V), input overvoltage tolerance, and high-output drive in a JEDEC UB-compliant hex inverter - making it irreplaceable in mixed-voltage industrial and legacy upgrade designs.
Availability
MC14049UBFL1 is available at Aetrix Electronics and suitable for industrial control I/O buffering, legacy system voltage translation, automotive body electronics, test equipment signal conditioning, and high-noise-margin logic interfacing requiring stable component supply across extended temperature and voltage ranges.
Supply support for MC14049UBFL1 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensors, and logic solutions for automotive, industrial, and communications markets.
The MC14049UBFL1 belongs to ON Semiconductor's legacy CMOS logic family, engineered specifically for robust level translation, high-noise immunity, and wide-supply operation in harsh industrial and retrofit applications.
FAQ
What is the maximum input voltage allowed on MC14049UBFL1 inputs?
The MC14049UBFL1 allows input voltages from –0.5 V to +18.0 V, regardless of VDD setting - enabling true level-shifting where inputs exceed the supply rail. This is explicitly specified in the Absolute Maximum Ratings table and confirmed in the "VIN can exceed VDD" feature statement. Exceeding +18.0 V risks permanent damage.
Does MC14049UBFL1 support driving TTL loads directly?
Yes, MC14049UBFL1 can drive two standard TTL/DTL loads when operated at VDD = 5.0 V, meeting VOL ≤ 0.4 V and IOL ≥ 3.2 mA per output. This capability is explicitly stated in the device description and verified in the Electrical Characteristics table under IOL conditions at VDD = 5 V.
Are pins 13 and 16 on MC14049UBFL1 functional or should they be left unconnected?
Pins 13 and 16 on MC14049UBFL1 are internally unconnected (NC), as confirmed in the Pin Assignment diagram and device description. External connections to these pins have no effect on circuit operation and are not recommended - they should remain unconnected on the PCB.
What is the typical quiescent current consumption of MC14049UBFL1 at 12 V supply?
At VDD = 12 V and TA = 25°C, the typical quiescent current (IDD) of MC14049UBFL1 is 2.0 µA per package, with a maximum of 4.0 µA across temperature. This value is taken directly from the Electrical Characteristics table under Quiescent Current, interpolated from the 10 V and 15 V rows.
Can MC14049UBFL1 be used in automotive under-hood applications?
MC14049UBFL1 is rated for ambient temperatures from –55°C to +125°C and meets JEDEC UB specifications, making it suitable for under-hood automotive applications where temperature and noise resilience are critical. However, it is not AEC-Q100 qualified, so system-level validation is required for safety-critical functions.
MC14049UBFL1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Circuits:
- -
- Number of Inputs:
- -
- Features:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -
- Input Logic Level - Low:
- -
- Input Logic Level - High:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MC14049UBFL1 FAQ
1.How can I place an order for MC14049UBFL1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC14049UBFL1 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 MC14049UBFL1 reliable?
The price and inventory of MC14049UBFL1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC14049UBFL1 is usually 5 days.
3.What payment methods are accepted for MC14049UBFL1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC14049UBFL1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC14049UBFL1?
MC14049UBFL1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC14049UBFL1 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 MC14049UBFL1?
For technical support, including MC14049UBFL1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC14049UBFL1 requirements.
6.How does Aetrix verify that MC14049UBFL1 is sourced from the original manufacturer or authorized distributors?
All MC14049UBFL1 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 MC14049UBFL1 meets industry standards.
7.What is the process for return or replacement of MC14049UBFL1?
All MC14049UBFL1 units undergo pre-shipment inspection (PSI). If there is an issue with MC14049UBFL1, 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 MC14049UBFL1 part is unused and in its original packaging.
Return procedure for MC14049UBFL1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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