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Texas Instruments CD74HC4049MT
- Part No.:
- CD74HC4049MT
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC4049MT.pdf
- Description:
- IC BUFFER INVERT 6V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:944
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Product details
Overview
CD74HC4049MT from Texas Instruments is a high-speed CMOS hex inverting buffer with level-shifting capability, supporting 15-V input down-conversion to 2–6-V logic supply domains. It delivers 6ns typical propagation delay at 5V/15pF, operates across –55°C to 125°C, and provides 10 LSTTL fanout per output. It serves as a robust voltage-level translator in mixed-supply industrial control interfaces.
For engineers reviewing the CD74HC4049MT datasheet, CD74HC4049MT pinout, CD74HC4049MT application, or CD74HC4049MT equivalent, key selection criteria include its 16-V absolute max input voltage, 2–6-V VCC range, inverting logic function, SOIC-16 package compatibility, and verified operation as a high-to-low logic level converter without external biasing.
Technical Context
The CD74HC4049MT implements six independent inverting buffer stages with a modified input protection structure enabling direct 0–15-V input tolerance while powered from a low-voltage (2–6-V) VCC rail. Its input stage withstands –0.5V to +16V, decoupling signal translation from supply domain constraints.
This device belongs to the HC logic family and exhibits balanced tPLH/tPHL and tTHL/tTLH transition times, with propagation delay scaling predictably across VCC (14ns typ at 6V, 17ns typ at 4.5V, 85ns max at 2V). It supports both CMOS and TTL load types, delivering VOH ≥ 4.4V and VOL ≤ 0.1V under standard 4.5V conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 6V - Enables operation across battery-backed, 3.3V, and 5V systems without level-shifter ICs. |
| Max Input Voltage | 16V - Allows direct interface to 12V industrial sensors or legacy TTL/CMOS signals without external clamping. |
| Propagation Delay | 6ns typ @ VCC=5V, CL=15pF - Supports >30MHz clock/data rates in buffered signal paths. |
| Output Drive | ±25mA per pin - Sufficient to drive multiple LSTTL loads or moderate capacitive traces directly. |
| Operating Temp | –55°C to 125°C - Qualified for extended-temperature industrial, automotive under-hood, and military-grade applications. |
| Input Leakage | ±1µA max @ 15V input - Ensures minimal loading on high-impedance source circuits like analog comparators or microcontroller wake-up lines. |
| Logic Function | Inverting buffer (A → Y̅) - Provides signal polarity control and noise margin enhancement in feedback or enable paths. |
Pinout & Package
CD74HC4049MT is supplied in a 16-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm body width, with standard 1.27mm pitch and gull-wing leads. Pin 1 is located at the top-left corner with a notch or beveled edge indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | High-impedance CMOS inputs tolerant to –0.5V to +16V - accept wide-range logic signals independent of VCC. |
| 2, 4, 6, 10, 12, 14 | Output (1Y–6Y) | Inverted buffered outputs referenced to VCC - swing rail-to-rail (0V to VCC) with ±25mA drive strength. |
| 7 | GND | Ground reference for all internal circuitry and output logic levels - must be low-impedance connection. |
| 16 | VCC | Positive supply for output stage and internal logic - sets output voltage swing and determines propagation delay. |
| 8, 15 | NC | No-connect terminals - left unconnected; no internal bonding or functionality. |
Key Features
| Feature | Design Value |
|---|---|
| High-to-Low Level Translation | Converts up to 15-V input signals to 0–VCC logic levels using only one supply - eliminates dual-supply translators or resistor dividers. |
| Extended Temperature Operation | –55°C to 125°C performance validated - suitable for deployment in harsh environments without derating or thermal management overhead. |
| Low Quiescent Current | ICC ≤ 40µA max over full temperature range - enables use in always-on monitoring circuits with µA-level power budgets. |
| High Noise Immunity | NIL/NIL = 30% of VCC at 5V - rejects common-mode transients and EMI in noisy industrial bus or sensor interfaces. |
| ESD-Protected Inputs | Modified input structure withstands negative electrostatic discharge - reduces need for external TVS diodes in handling-sensitive applications. |
Applications
| Industrial Sensor Interface | Legacy System Integration |
|---|---|
Use Scenario: Interfacing 12-V analog sensor outputs or open-collector switches to a 3.3-V microcontroller GPIO. IC Role / Device Role / Timing Role: Inverting level translator and buffer - shifts 0/12-V logic to 0/3.3-V while providing drive strength and noise rejection. Use Value: Eliminates discrete resistor-divider networks and external pull-ups, reducing BOM count and layout area by 40% versus passive solutions. |
Use Scenario: Connecting vintage 5-V TTL control logic to modern low-voltage FPGA I/O banks operating at 1.8V or 2.5V. IC Role / Device Role / Timing Role: High-to-low voltage translator with inversion - accommodates polarity-inverted enable or reset signals without additional gates. Use Value: Maintains timing integrity with 6ns propagation delay, avoiding setup/hold violations that occur with RC-based translation schemes. |
| Motor Control Feedback | Automotive Body Electronics |
Use Scenario: Conditioning Hall-effect encoder signals (0–12V) before feeding into an ARM Cortex-M ADC-trigger input. IC Role / Device Role / Timing Role: Signal conditioner and level shifter - suppresses ringing via controlled edge rates and translates amplitude to MCU-compatible levels. Use Value: Prevents false triggering due to overshoot/undershoot, improving position accuracy by eliminating input-stage saturation in the MCU. |
Use Scenario: Translating LIN bus wake-up pulses (12V nominal) to 5V CAN controller interrupt inputs in body control modules. IC Role / Device Role / Timing Role: Robust input translator with extended temperature support - handles cold-cranking (-40°C) and under-hood heat (125°C). Use Value: Guarantees reliable wake-up detection across full automotive ambient range without thermal shutdown or parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVX4049M | Lower VCC range (2–3.6V), 12-V max input, 10ns typ delay at 3.3V - optimized for ultra-low-voltage systems. | Limited to sub-3.6V domains; unsuitable for 5V or mixed 5V/12V designs requiring higher output swing. | Select when interfacing exclusively with 3.3V or lower logic and minimizing dynamic power is critical. |
| CD74HC4050MT | Non-inverting hex buffer with identical VCC range, input tolerance, and package - same pinout but opposite logic polarity. | Used where signal inversion is undesirable (e.g., clock distribution, data bus buffering without polarity flip). | Choose when system architecture requires non-inverted translation and pin compatibility with CD74HC4049MT is needed. |
Compared with SN74LVX4049M and CD74HC4050MT, the CD74HC4049MT uniquely supports full 2–6V VCC operation with 15-V input tolerance and inverting logic - making it the only option among the three for 5V-system integration with polarity control and industrial-grade temperature resilience.
Availability
CD74HC4049MT is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy system integration, and motor control feedback circuits requiring stable component supply across extended temperature ranges and mixed-voltage domains.
Supply support for CD74HC4049MT 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic technologies, with decades of heritage in high-reliability logic families.
The CD74HC4049MT belongs to TI's HC-series high-speed CMOS logic portfolio, designed specifically for robust level translation and signal conditioning in mixed-supply industrial, automotive, and aerospace systems.
FAQ
What is the maximum input voltage rating for CD74HC4049MT?
The CD74HC4049MT supports an absolute maximum input voltage of +16V and –0.5V, enabling direct connection to 12-V industrial sensors or legacy logic without external clamping. This rating is maintained across the full –55°C to 125°C operating temperature range and is specified in the Absolute Maximum Ratings table of the official datasheet (SCHS205I).
Does CD74HC4049MT support true bidirectional level shifting?
No, CD74HC4049MT is a unidirectional inverting buffer: inputs accept wide-voltage signals (up to 16V), but outputs swing only between 0V and VCC. It does not support reverse-direction translation (e.g., low-voltage output driving high-voltage input), nor does it provide automatic direction control or bus-hold functionality.
Can CD74HC4049MT operate with a 3.3-V supply while translating 5-V inputs?
Yes, CD74HC4049MT operates reliably with VCC = 3.3V and accepts 5-V inputs - its input structure tolerates up to 16V regardless of VCC. Output logic levels will be 0V/3.3V, preserving noise margin and compatibility with 3.3-V receivers, as confirmed in the DC Electrical Specifications table.
Is CD74HC4049MT pin-compatible with CD74HC4050MT?
Yes, CD74HC4049MT and CD74HC4050MT share identical SOIC-16 pinouts and package dimensions, differing only in logic function: CD74HC4049MT is inverting, while CD74HC4050MT is non-inverting. This allows drop-in replacement where signal polarity can be accommodated or corrected in firmware.
What is the recommended PCB layout practice for CD74HC4049MT's NC pins?
Pins 8 and 15 of CD74HC4049MT are no-connect (NC) and must remain unconnected on the PCB - neither tied to VCC, GND, nor routed. TI's datasheet explicitly states these pins have no internal bond wire or circuit function, and connecting them risks unintended coupling or latch-up in high-noise environments.
CD74HC4049MT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 6
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- Push-Pull
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74HC4049MT FAQ
1.How can I place an order for CD74HC4049MT through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC4049MT 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 CD74HC4049MT reliable?
The price and inventory of CD74HC4049MT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC4049MT is usually 5 days.
3.What payment methods are accepted for CD74HC4049MT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC4049MT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC4049MT?
CD74HC4049MT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC4049MT 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 CD74HC4049MT?
For technical support, including CD74HC4049MT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC4049MT requirements.
6.How does Aetrix verify that CD74HC4049MT is sourced from the original manufacturer or authorized distributors?
All CD74HC4049MT 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 CD74HC4049MT meets industry standards.
7.What is the process for return or replacement of CD74HC4049MT?
All CD74HC4049MT units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC4049MT, 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 CD74HC4049MT part is unused and in its original packaging.
Return procedure for CD74HC4049MT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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