My Inquiry
My Account
Texas Instruments CD74HC4049NSRG4
- Part No.:
- CD74HC4049NSRG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
CD74HC4049NSRG4.pdf
- Description:
- IC INVERTER 6CH 6-INP 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,773
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD74HC4049NSRG4 from Texas Instruments is a hex inverting buffer IC designed for high-to-low voltage level translation, supporting up to 15 V input while operating from a 2–6 V supply. It delivers 6 ns typical propagation delay at 5 V/15 pF, operates across –55°C to 125°C, and provides 10 LSTTL fanout with CMOS-compatible inputs and outputs.
For engineers reviewing the CD74HC4049NSRG4 datasheet, CD74HC4049NSRG4 pinout, CD74HC4049NSRG4 application, or CD74HC4049NSRG4 equivalent, key selection criteria include its 15 V tolerant inputs, rail-to-rail output swing, wide temperature range, and compatibility with legacy TTL logic interfaces in mixed-voltage systems.
Technical Context
The CD74HC4049NSRG4 implements six independent inverting buffers with modified input protection enabling robust high-voltage (up to 15 V) signal down-conversion to low-voltage logic domains. Its silicon-gate CMOS process ensures low static power consumption and high noise immunity (30% of VCC at 5 V).
It supports dual-domain operation: inputs accept voltages up to 15 V regardless of VCC (2–6 V), while outputs swing rail-to-rail between GND and VCC. Propagation delays are balanced (tPLH ≈ tPHL), and transition times remain consistent across temperature and supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Hex inverting buffer - provides six independent A→Y inversion paths with no internal feedback or latching. |
| Input Voltage Range | –0.5 V to 15 V - enables direct interfacing with 12 V or 15 V analog/legacy logic without external resistive dividers. |
| Supply Voltage Range | 2 V to 6 V - compatible with 3.3 V and 5 V systems; not functional below 2 V or above 6 V. |
| Propagation Delay | 6 ns typical at VCC = 5 V, CL = 15 pF - ensures timing predictability in high-speed digital control and interface circuits. |
| Operating Temperature | –55°C to 125°C - qualified for extended industrial, automotive under-hood, and military-grade applications. |
| Fanout Capability | 10 LSTTL loads - drives standard TTL inputs directly without buffering, reducing component count in mixed-logic designs. |
| Input Leakage Current | ±1 µA max at 15 V input - minimizes loading on high-impedance source signals such as microcontroller GPIO or sensor outputs. |
Pinout & Package
SOP-16 (Small Outline Package, 16-pin) with 1.27 mm pitch; body dimensions 10.2 mm × 5.3 mm × 1.75 mm; RoHS-compliant, NIPDAU lead finish; MSL Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | High-voltage tolerant logic inputs accepting up to 15 V; internally clamped but not limited by VCC. |
| 2, 4, 6, 10, 12, 14 | Output (1Y–6Y) | Inverted buffered outputs swinging from GND to VCC; capable of ±25 mA per pin. |
| 7 | GND | Ground reference for both logic and power; must be connected to system ground plane for noise immunity. |
| 16 | VCC | Positive supply for output stage and internal logic; sets output high level and defines noise margins. |
| 8, 15 | NC | No-connect terminals - left unconnected; no internal connection or function; avoid routing traces to them. |
Key Features
| Feature | Design Value |
|---|---|
| High-to-Low Level Translation | Converts 15 V input signals to 0–VCC logic levels using only one supply - eliminates need for dual-supply translators or discrete resistor networks. |
| Rail-to-Rail Output Swing | Outputs drive fully to GND and VCC, ensuring maximum noise margin and compatibility with downstream CMOS or TTL inputs. |
| Wide Supply Range (2–6 V) | Operates across common logic rails including 2.5 V, 3.3 V, and 5 V - simplifies design reuse across multiple platform generations. |
| Enhanced ESD Protection | Modified input structure withstands negative electrostatic discharge events - improves reliability in handling-sensitive environments. |
| Low Quiescent Current | ICC ≤ 40 µA max over full temperature range - reduces standby power in battery-operated or energy-constrained systems. |
Applications
| Industrial PLC I/O Interface | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Interfacing 12 V industrial sensors (e.g., proximity switches, limit switches) to a 3.3 V microcontroller-based PLC module. IC Role / Device Role / Timing Role: Inverting level translator and buffer - accepts 12 V switch closure signals and outputs clean 0–3.3 V logic-compatible pulses. Use Value: Eliminates external voltage dividers and pull-up resistors, reducing BOM count and PCB area while maintaining fast edge integrity (6 ns delay). |
Use Scenario: Converting analog sensor outputs (e.g., throttle position, coolant temp) conditioned to 0–12 V range into digital-ready logic levels for an automotive MCU ADC trigger circuit. IC Role / Device Role / Timing Role: High-voltage input conditioner - translates 12 V pulses to 0–5 V inverted logic edges synchronized to engine control timing windows. Use Value: Enables direct integration of legacy 12 V sensor subsystems without redesigning front-end analog stages or adding isolated level-shifting ICs. |
| Mixed-Voltage Microcontroller Peripherals | Legacy TTL System Upgrades |
Use Scenario: Connecting 5 V peripherals (e.g., EEPROM, UART transceivers) to a 3.3 V ARM Cortex-M microcontroller with open-drain or push-pull I/O constraints. IC Role / Device Role / Timing Role: Bidirectional-capable inverter buffer - used in unidirectional mode to shift 5 V peripheral ACK/NACK signals down to 3.3 V logic thresholds. Use Value: Maintains timing compliance (sub-10 ns delay) and avoids bus contention issues inherent in passive resistor-based solutions. |
Use Scenario: Retrofitting obsolete 74LS04-based control logic in aging test equipment with modern low-power CMOS equivalents. IC Role / Device Role / Timing Role: Pin-compatible logic replacement - provides identical 1A→1Y through 6A→6Y inversion mapping and TTL-compatible output drive. Use Value: Reduces system power consumption by >90% versus LS-TTL while preserving existing PCB layout and firmware timing assumptions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC04DR | Standard 2–6 V hex inverter with 5.5 V max input rating - lacks 15 V input tolerance and level translation capability. | Only suitable for same-supply domain logic buffering; cannot replace CD74HC4049NSRG4 in mixed-voltage signal paths. | Select when interfacing within a single 3.3 V or 5 V domain and lowest cost is prioritized over high-voltage input support. |
| CD74HC4050NSR | Non-inverting hex buffer with identical 15 V input tolerance, package, and temperature rating - differs only in logic polarity. | Used where signal polarity preservation is required (e.g., clock distribution, enable lines), not inversion. | Choose when the system requires non-inverted level translation - shares footprint, thermal profile, and qualification data with CD74HC4049NSRG4. |
Compared with SN74HC04DR and CD74HC4050NSR, the CD74HC4049NSRG4 uniquely combines 15 V input tolerance with inverting logic, making it irreplaceable in applications requiring both voltage down-conversion and signal inversion without added components.
Availability
CD74HC4049NSRG4 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and aerospace avionics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC4049NSRG4 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 solutions, with decades of experience in high-reliability industrial and automotive IC design.
The CD74HC4049NSRG4 belongs to TI's legacy HC logic family - engineered for robustness in mixed-voltage systems, emphasizing interoperability between legacy and modern logic families across harsh environmental conditions.
FAQ
What is the maximum input voltage the CD74HC4049NSRG4 can safely accept?
The CD74HC4049NSRG4 supports DC input voltages from –0.5 V to 15 V, independent of VCC. This allows direct connection to 12 V or 15 V sources without external attenuation. Exceeding 15 V risks permanent damage, as specified in Absolute Maximum Ratings. The CD74HC4049NSRG4 input protection structure is optimized for this range and validated per JEDEC JESD78.
Can the CD74HC4049NSRG4 operate with a 3.3 V supply while accepting 12 V inputs?
Yes - the CD74HC4049NSRG4 is explicitly designed for this use case. With VCC = 3.3 V, it accepts 12 V inputs and produces 0–3.3 V inverted outputs. Its modified input protection enables safe operation across the full 2–6 V supply range while maintaining 15 V input tolerance. This behavior is confirmed in the Functional Description and DC Electrical Specifications sections of the datasheet.
Is the CD74HC4049NSRG4 pin-compatible with the CD74HC4050NSR?
Yes - the CD74HC4049NSRG4 and CD74HC4050NSR share identical SOP-16 pinouts, thermal profiles, and package markings. They differ only in logic function: CD74HC4049NSRG4 is inverting, while CD74HC4050NSR is non-inverting. This allows drop-in replacement in layouts where signal polarity can be accommodated via firmware or board-level inversion.
Does the CD74HC4049NSRG4 require external pull-up or pull-down resistors on unused inputs?
No - all six inputs of the CD74HC4049NSRG4 have defined logic thresholds and internal protection. Unused inputs should be tied to VCC or GND to prevent floating states and reduce dynamic power consumption. Leaving them unconnected may cause oscillation or increased ICC due to noise coupling, but no external resistors are needed for basic biasing.
What is the thermal performance of the CD74HC4049NSRG4 in SOP-16 package?
The CD74HC4049NSRG4 in SOP-16 (NS package) has a junction-to-ambient thermal resistance (θJA) of 64°C/W, as specified in the Thermal Information table. At 25°C ambient and 5 V operation with moderate loading, junction temperature remains well below the 150°C plastic-package limit. Derating is recommended above 85°C ambient per TI's thermal guidelines.
CD74HC4049NSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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-SO
CD74HC4049NSRG4 FAQ
1.How can I place an order for CD74HC4049NSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC4049NSRG4 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 CD74HC4049NSRG4 reliable?
The price and inventory of CD74HC4049NSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC4049NSRG4 is usually 5 days.
3.What payment methods are accepted for CD74HC4049NSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC4049NSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC4049NSRG4?
CD74HC4049NSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC4049NSRG4 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 CD74HC4049NSRG4?
For technical support, including CD74HC4049NSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC4049NSRG4 requirements.
6.How does Aetrix verify that CD74HC4049NSRG4 is sourced from the original manufacturer or authorized distributors?
All CD74HC4049NSRG4 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 CD74HC4049NSRG4 meets industry standards.
7.What is the process for return or replacement of CD74HC4049NSRG4?
All CD74HC4049NSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC4049NSRG4, 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 CD74HC4049NSRG4 part is unused and in its original packaging.
Return procedure for CD74HC4049NSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD74HC4049NSRG4 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
