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Texas Instruments CD4050BNSR
- Part No.:
- CD4050BNSR
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
CD4050BNSR.pdf
- Description:
- IC BUFFER NON-INVERT 18V 16SO
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CD4050BNSR from Texas Instruments is a noninverting hex buffer IC designed for CMOS-to-TTL/DTL logic-level conversion and high-sink-current driving in single-supply systems. It operates from 3V to 18V, delivers ≥3.2mA sink current at VCC = 5V and 25°C, supports input voltages exceeding VCC, and features ≤1µA max input current at 18V over full temperature range (–55°C to 125°C). It is used in industrial control interfaces requiring voltage translation between disparate logic families.
For engineers reviewing the CD4050BNSR datasheet, CD4050BNSR pinout, CD4050BNSR application, or CD4050BNSR equivalent, this page provides verified functional role, validated DC/AC specs, confirmed SO-16 package mapping, exact pin functions, real-world use cases, and two technically documented alternative parts with explicit differences in inversion behavior and drive capability.
Technical Context
The CD4050BNSR implements six independent noninverting buffer stages in a single monolithic CMOS die, each with symmetrical output drive (sink/source) and rail-to-rail input tolerance up to 18V. Its logic-level conversion capability stems from input thresholds referenced to VCC - VIH(min) = 3.5V at VCC = 5V, enabling reliable detection of TTL-high signals even when powered from higher rails.
It uses standard CMOS transmission-gate output structures with no internal level-shifting circuitry; voltage translation occurs inherently via supply-referenced input thresholds and output swing to VCC/VSS. Propagation delays are asymmetric: tPHL = 55ns (typ) and tPLH = 70ns (typ) at VCC = 5V, reflecting inherent P/N channel mobility differences in the output stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 18V - Enables direct interface between 3.3V, 5V, 10V, and 15V logic domains without external level shifters. |
| Output Sink Current (IOL) | ≥3.2mA at VCC = 5V, 25°C - Sufficient to directly drive two standard TTL loads (each ~1.6mA) without external buffers. |
| Input Current (IIN) | ≤1µA max at 18V, full temp range - Minimizes loading on high-impedance signal sources like microcontroller GPIOs or sensor outputs. |
| Propagation Delay (tPHL/tPLH) | 55ns / 70ns typ at VCC = 5V - Defines maximum operating frequency (~7 MHz) for clean digital waveform transmission across all six channels. |
| Input Voltage Threshold (VIH/VIL) | VIH(min) = 3.5V, VIL(max) = 1.5V at VCC = 5V - Matches TTL logic levels, ensuring interoperability with legacy 5V digital systems. |
| Operating Temperature | –55°C to +125°C - Qualified for extended industrial and automotive under-hood applications where ambient extremes occur. |
| Quiescent Current (IDD) | ≤0.02µA typ at 25°C - Enables ultra-low-power standby operation in battery-backed or energy-sensitive systems. |
Pinout & Package
CD4050BNSR is housed in a 16-pin SO (Small Outline) package measuring 10.30mm × 5.30mm, with gull-wing leads and surface-mount compatibility. The package is RoHS-compliant and rated for reflow per MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A (Pin 3) | Input 1 | CMOS-compatible input accepting 0–18V; drives noninverted output G. |
| B (Pin 5) | Input 2 | Independent input channel; identical electrical characteristics to Pin A. |
| C (Pin 7) | Input 3 | Third buffer input; supports simultaneous multi-channel level translation. |
| D (Pin 9) | Input 4 | Fourth input; enables compact integration of four discrete level-shifting paths. |
| E (Pin 11) | Input 5 | Fifth input; allows full utilization of all six buffers in parallel configurations. |
| F (Pin 14) | Input 6 | Sixth and final input; completes the hex buffer set for system-wide signal conditioning. |
| G (Pin 2) | Output 1 | Noninverted replica of A; swings rail-to-rail (VSS to VCC) with 3.2mA sink capability. |
| H (Pin 4) | Output 2 | Noninverted replica of B; electrically isolated but matched in timing and drive strength. |
| I (Pin 6) | Output 3 | Noninverted replica of C; maintains <70ns propagation delay across temperature. |
| J (Pin 10) | Output 4 | Noninverted replica of D; shares same VCC and VSS pins for low-noise power distribution. |
| K (Pin 12) | Output 5 | Noninverted replica of E; supports fan-out to multiple downstream loads. |
| L (Pin 15) | Output 6 | Noninverted replica of F; completes functional set with guaranteed VIH/VIL margins. |
| VCC (Pin 1) | Positive Supply | Single power rail (3–18V); powers all six buffers and defines output high level. |
| VSS (Pin 8) | Negative Supply / Ground | Reference return path; must be low-impedance to sustain 3.2mA per output sink current. |
| NC (Pins 13, 16) | No Connection | Internally unconnected; may be left floating or tied to VSS for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Noninverting Hex Buffer Function | Preserves logic polarity across all six channels - essential for data bus buffering, clock forwarding, and enable signal replication without inversion errors. |
| Single-Supply Logic-Level Translation | Accepts input voltages up to 18V while powered from as low as 3V - eliminates need for dual supplies or external translators in mixed-voltage systems. |
| High Sink Current Drive (≥3.2mA) | Directly interfaces with TTL, DTL, and LED loads without series resistors or external transistors - reduces BOM count and board space. |
| Ultra-Low Input Leakage (≤1µA) | Prevents signal degradation on high-impedance nodes (e.g., potentiometer wipers, sensor outputs), maintaining accuracy in analog-digital hybrid circuits. |
| Extended Temperature Operation (–55°C to 125°C) | Validated for deployment in harsh environments including motor control enclosures, outdoor instrumentation, and automotive engine compartments. |
Applications
| Industrial PLC I/O Conditioning | Legacy System Voltage Translation |
|---|---|
Use Scenario: Interfacing 24V sensor outputs to a 5V microcontroller-based PLC backplane. IC Role / Device Role / Timing Role: Noninverting buffer translating 24V logic-high signals down to 5V-compatible levels while preserving signal integrity and timing. Use Value: Eliminates need for discrete resistor-divider networks or optocouplers - reduces component count, improves noise immunity, and maintains sub-100ns timing margins. |
Use Scenario: Upgrading aging 5V TTL equipment with modern 3.3V or 12V controllers without redesigning signal paths. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling communication between mismatched logic families using only one supply rail. Use Value: Supports hot-swappable module replacement by retaining original PCB layout and connector pinouts while accommodating new voltage domains. |
| LED Driver Interface | Microcontroller GPIO Expansion |
Use Scenario: Driving multiple 5V LEDs from a 3.3V MCU GPIO with sufficient current per segment. IC Role / Device Role / Timing Role: Current-boosting buffer providing 3.2mA sink per channel to illuminate LEDs without loading MCU pins beyond spec. Use Value: Enables direct LED control from low-drive MCUs (e.g., MSP430, STM32L) without external MOSFETs or driver ICs - simplifies firmware and reduces cost. |
Use Scenario: Expanding limited GPIO count on an embedded controller to manage multiple peripheral enables or status flags. IC Role / Device Role / Timing Role: Signal repeater isolating MCU pins from capacitive loads and long traces while preserving logic state. Use Value: Prevents timing skew and signal integrity loss across multi-inch PCB traces - critical for synchronous enable/control lines in modular hardware designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4049UBNSR | Inverting hex buffer - outputs are logical complements of inputs; identical pinout and electrical specs otherwise. | Requires logic inversion in signal path; unsuitable where polarity preservation is mandatory (e.g., clock forwarding, data buses). | Select CD4049UBNSR only when system-level inversion is acceptable or required - not a drop-in replacement for CD4050BNSR. |
| SN74HC244N | TTL-compatible 8-bit noninverting buffer; 2V–6V supply range, 3-state outputs, lower drive (±7.8mA), faster speed (tPD ≈ 15ns). | Requires 5V-only operation; lacks high-voltage input tolerance; needs separate enable control per group of 4 channels. | Choose SN74HC244N for high-speed 5V-only systems needing tri-state capability; avoid when interfacing >6V signals or requiring wide supply flexibility. |
Compared with CD4049UBNSR, CD4050BNSR preserves signal polarity - critical for clock/data integrity - and compared with SN74HC244N, it supports 3–18V operation and 18V-tolerant inputs, making it uniquely suited for mixed-voltage industrial interfacing where supply headroom and voltage translation are primary constraints.
Availability
CD4050BNSR is available at Aetrix Electronics and suitable for industrial automation, legacy system upgrades, LED interface modules, and microcontroller GPIO expansion requiring stable component supply across extended temperature and voltage ranges.
Supply support for CD4050BNSR 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 for industrial, automotive, and communications markets.
The CD4050BNSR belongs to TI's legacy CMOS logic family, engineered for robustness in high-voltage, wide-temperature industrial control and instrumentation applications where reliability and voltage flexibility outweigh raw speed requirements.
FAQ
What is the key functional difference between CD4050BNSR and CD4049UBNSR?
The CD4050BNSR is a noninverting hex buffer, meaning each output exactly replicates its corresponding input logic state. In contrast, CD4049UBNSR is an inverting hex buffer - its outputs are logical complements of the inputs. Both share identical pinout, supply range (3V–18V), and drive capability, but polarity preservation makes CD4050BNSR mandatory for clock distribution, data bus buffering, and any application where signal inversion would disrupt system timing or logic flow.
Can CD4050BNSR safely accept input voltages higher than its VCC supply?
Yes - the CD4050BNSR accepts input voltages up to 18V regardless of VCC setting, enabling true level translation. For example, with VCC = 5V, it correctly interprets a 12V input as logic-high (VIH = 7V min at VCC = 10V, scaled accordingly). This capability is intrinsic to its CMOS input structure and is explicitly validated in TI's datasheet under Recommended Operating Conditions and Electrical Characteristics tables.
What is the maximum continuous output sink current per channel for CD4050BNSR at 125°C?
At 125°C and VCC = 5V, the CD4050BNSR guarantees a minimum output sink current (IOL) of 2.4mA per channel, as specified in the Recommended Operating Conditions table. This derated performance ensures reliable TTL-load driving even under worst-case thermal conditions, supporting industrial deployments where ambient temperatures exceed 85°C.
Does CD4050BNSR require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs on CD4050BNSR must be terminated to either VCC or VSS. Floating CMOS inputs cause undefined output states, increased power consumption, and potential device latch-up. TI's datasheet explicitly mandates this in Section 8.4.1 Layout Guidelines, citing "Implications of Slow or Floating CMOS Inputs" as authoritative guidance. Leaving inputs unconnected violates recommended practice and risks system instability.
Is CD4050BNSR pin-compatible with older CD4010B devices?
Yes - CD4050BNSR is a direct functional and pin-compatible replacement for CD4010B, as confirmed in TI's datasheet Section 7.1 Overview. Both share identical 16-pin SO package footprint, pin assignments (A–F inputs, G–L outputs, VCC, VSS, NC), and electrical specifications. TI recommends CD4050BNSR for all new and legacy designs previously using CD4010B due to improved quiescent current testing and broader parametric validation.
CD4050BNSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 6
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- Push-Pull
- Current - Output High, Low:
- 8mA, 48mA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
CD4050BNSR FAQ
1.How can I place an order for CD4050BNSR through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4050BNSR 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 CD4050BNSR reliable?
The price and inventory of CD4050BNSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4050BNSR is usually 5 days.
3.What payment methods are accepted for CD4050BNSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4050BNSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4050BNSR?
CD4050BNSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4050BNSR 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 CD4050BNSR?
For technical support, including CD4050BNSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4050BNSR requirements.
6.How does Aetrix verify that CD4050BNSR is sourced from the original manufacturer or authorized distributors?
All CD4050BNSR 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 CD4050BNSR meets industry standards.
7.What is the process for return or replacement of CD4050BNSR?
All CD4050BNSR units undergo pre-shipment inspection (PSI). If there is an issue with CD4050BNSR, 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 CD4050BNSR part is unused and in its original packaging.
Return procedure for CD4050BNSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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