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Texas Instruments CD4050BDT
- Part No.:
- CD4050BDT
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD4050BDT.pdf
- Description:
- IC BUFFER NON-INVERT 18V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,220
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Product details
Overview
CD4050BDT from Texas Instruments is a noninverting hex buffer IC designed for CMOS-to-TTL/DTL logic-level conversion and high-current sinking/source driving in single-supply systems. It operates from 3V to 18V, delivers ≥3.2mA sink current at VCC = 5V and TA = 25°C, supports –55°C to +125°C industrial temperature range, and features 1µA max input current at 18V across full temperature range - used in voltage translation interfaces for microcontroller I/O expansion.
For engineers reviewing the CD4050BDT datasheet, CD4050BDT pinout, CD4050BDT application, or CD4050BDT equivalent, this page provides verified functional specifications, validated SOIC-16 pin mapping, confirmed logic-level conversion capability, and direct alternative part comparisons for legacy CMOS interface design.
Technical Context
The CD4050BDT implements six independent noninverting buffer stages with symmetrical output drive (sink/source), enabling bidirectional voltage translation without external level-shifting circuitry. Its input high threshold (VIH) scales with VCC - e.g., 3.5V min at VCC = 5V, 7V min at VCC = 10V - allowing reliable interfacing between higher-voltage CMOS logic and lower-voltage TTL loads.
Each buffer exhibits low propagation delay (tPHL ≤ 110ns, tPLH ≤ 140ns at VCC = 5V, TA = 25°C) and fast transition times (tTHL ≤ 60ns, tTLH ≤ 160ns), while maintaining quiescent current below 0.02µA at 25°C and 20V supply - critical for low-power industrial control and battery-backed sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 18V - enables direct interface between 3.3V/5V microcontrollers and 12V industrial sensors or actuators. |
| Output Sink Current (IOL) | ≥3.2mA at VCC = 5V, TA = 25°C - sufficient to drive two standard TTL loads without external transistors. |
| Input Current (IIN) | ≤1µA at 18V, full temperature range - minimizes loading on high-impedance CMOS sources like microcontroller GPIOs. |
| Propagation Delay | tPHL ≤ 110ns, tPLH ≤ 140ns at VCC = 5V - ensures timing integrity in medium-speed digital control loops (≤5MHz). |
| Operating Temperature | –55°C to +125°C - qualified for under-hood automotive, industrial PLC, and outdoor embedded applications. |
| Input Capacitance | 5–7.5pF - low capacitive loading preserves signal edge rate in high-impedance bus environments. |
Pinout & Package
CD4050BDT is housed in a 16-pin SOIC (D) package measuring 9.90mm × 3.91mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Pin 1 is marked by a beveled corner or dot; pins are numbered counter-clockwise from pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Positive power supply | Single-supply rail for all six buffers; must be bypassed with 0.1µF capacitor near pin. |
| 2 (G) | Noninverting output 1 | Output matches logic state of input A (pin 3); drives TTL loads directly. |
| 3 (A) | Input 1 | CMOS-compatible input accepting VIH ≥3.5V at VCC = 5V; not overvoltage tolerant above VCC. |
| 4 (H) | Noninverting output 2 | Output matches logic state of input B (pin 5); electrically isolated from other outputs. |
| 5 (B) | Input 2 | Independent input with same VIH/VIL thresholds as pin 3; no internal connection to other inputs. |
| 6 (I) | Noninverting output 3 | Output matches logic state of input C (pin 7); supports simultaneous switching of all six buffers. |
| 7 (C) | Input 3 | Third dedicated input; shares identical DC/AC specs with pins 3 and 5. |
| 8 (VSS) | Negative supply / ground | Reference return for all inputs and outputs; requires low-impedance connection to system ground plane. |
| 9 (D) | Input 4 | Fourth input; functionally identical to pins 3, 5, and 7 - no shared internal nodes. |
| 10 (J) | Noninverting output 4 | Output matches logic state of input D (pin 9); maintains VOH ≥4.95V at VCC = 5V. |
| 11 (E) | Input 5 | Fifth input; supports full operating voltage range and temperature specification. |
| 12 (K) | Noninverting output 5 | Output matches logic state of input E (pin 11); sinks up to 2.4mA at 125°C. |
| 13, 16 (NC) | No connection | Internally unconnected; may be left floating or tied to VSS/VCC for mechanical stability - no electrical effect. |
| 14 (F) | Input 6 | Sixth and final input; completes hex buffer functionality with identical parametric performance. |
| 15 (L) | Noninverting output 6 | Output matches logic state of input F (pin 14); completes full-channel buffering capability. |
Key Features
| Feature | Design Value |
|---|---|
| Noninverting hex buffer architecture | Preserves logic polarity across all six channels - eliminates need for external inversion in bus interface designs. |
| Single-supply logic-level translation | Accepts input voltages up to VCC, outputs swing rail-to-rail - enables CMOS (e.g., 12V) to TTL (5V) conversion without dual supplies. |
| High sink/source drive strength | Delivers ≥3.2mA sink and ≥2.1mA source at VCC = 5V - directly drives LEDs, relays, and TTL inputs without discrete transistors. |
| Ultra-low input leakage | ≤1µA max at 18V and full temperature range - prevents false triggering in high-impedance sensor conditioning circuits. |
| Extended temperature qualification | Rated for –55°C to +125°C operation - suitable for automotive engine control, industrial motor drives, and aerospace subsystems. |
Applications
| Microcontroller I/O Expansion | Industrial Sensor Interface |
|---|---|
Use Scenario: Expanding limited GPIO count of an ARM Cortex-M0+ MCU to drive six 5V TTL peripherals. IC Role / Device Role / Timing Role: Noninverting buffer translating 3.3V CMOS outputs to 5V TTL-compatible levels while providing current gain. Use Value: Eliminates need for six discrete MOSFET level shifters; reduces BOM cost and PCB area by >40% versus discrete solution. | Use Scenario: Interfacing 12V analog sensor outputs (e.g., pressure transducer) to a 5V ADC controller via digital enable lines. IC Role / Device Role / Timing Role: Logic-level translator converting 12V enable signals to 5V-compatible control inputs with rail-to-rail output swing. Use Value: Enables direct use of high-voltage industrial sensors without custom voltage-divider networks or optocouplers. |
| Legacy System Upgrades | LED Driver Interface |
Use Scenario: Replacing obsolete CD4010B in a 1980s industrial PLC backplane where pin compatibility is mandatory. IC Role / Device Role / Timing Role: Drop-in replacement noninverting hex buffer with identical pinout and enhanced drive capability. Use Value: Maintains legacy board layout while improving noise immunity and load-driving margin - no requalification required. | Use Scenario: Driving six status LEDs from a low-power MSP430 microcontroller with 3.3V I/O. IC Role / Device Role / Timing Role: Current-boosting buffer sourcing up to 2.1mA per LED anode while preserving logic state. Use Value: Achieves bright LED illumination without degrading MCU output voltage - avoids brown-out during simultaneous LED activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar noninverting hex buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4050BE | Same core functionality but in 16-pin PDIP (N) package; larger footprint (6.35mm × 19.30mm) and through-hole mounting. | Preferred for prototyping, manual assembly, or legacy through-hole PCBs; unsuitable for space-constrained SMT designs. | Select CD4050BE only when PDIP form factor is required; CD4050BDT offers superior thermal resistance (RθJA = 81.6°C/W vs 49.5°C/W) and automated assembly compatibility. |
| MC74HC4050DT | 74HC-family device with 2V–6V supply range; faster propagation (tPD ≈ 10ns at 5V) but lower drive (IOL = 4mA typ) and narrower voltage range. | Optimized for high-speed 5V-only systems; cannot replace CD4050BDT in 12V or wide-voltage applications. | Choose MC74HC4050DT only for new 5V logic designs requiring sub-25ns timing; CD4050BDT remains essential for multi-voltage industrial interfaces. |
Compared with CD4050BE and MC74HC4050DT, CD4050BDT uniquely supports 3–18V operation with verified 125°C performance and SOIC-16 packaging - making it the sole option for compact, high-temperature, wide-supply industrial control interfaces.
Availability
CD4050BDT is available at Aetrix Electronics and suitable for industrial automation, automotive subsystems, and legacy equipment repair requiring stable component supply and long-term obsolescence management.
Supply support for CD4050BDT 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.
CD4050BDT belongs to TI's legacy CMOS logic family, engineered for robust voltage translation and high-noise-immunity interfacing in harsh environments - targeting applications where reliability across extreme temperatures and supply voltages is non-negotiable.
FAQ
What is the maximum supply voltage rating for CD4050BDT?
The CD4050BDT has an absolute maximum supply voltage (VCC to VSS) of 20V, with recommended operating range from 3V to 18V. Operation at 20V is permitted only for short-duration testing; continuous operation above 18V risks exceeding junction temperature limits and degrading long-term reliability. The CD4050BDT is fully characterized for DC and AC parameters at 5V, 10V, and 15V supply points.
Is CD4050BDT pin-compatible with CD4010B?
Yes, CD4050BDT is pin-compatible with CD4010B and designated by Texas Instruments as its direct replacement. Both devices share identical 16-pin SOIC (D) pinout, including VCC (pin 1), six input/output pairs (pins 2–15), VSS (pin 8), and NC (pins 13, 16). This allows drop-in substitution in existing designs without PCB modification, while delivering improved sink current and extended temperature range.
Can CD4050BDT translate 12V logic signals to 5V TTL levels?
Yes, CD4050BDT can translate 12V CMOS inputs to 5V TTL-compatible outputs when powered at VCC = 5V. Its input structure accepts VIH up to VCC, and with VCC = 5V, VIH(min) = 3.5V - well below 12V. The output swings rail-to-rail (VOH ≥4.95V, VOL ≤0.05V), meeting TTL VOH/VOL thresholds. However, inputs must not exceed VCC due to internal clamp diodes - external resistive dividers are required for >5V inputs when VCC = 5V.
What is the typical propagation delay of CD4050BDT at 5V supply?
At VCC = 5V and TA = 25°C, CD4050BDT exhibits tPHL (high-to-low) ≤110ns and tPLH (low-to-high) ≤140ns, with typical values of 55ns and 70ns respectively. These delays are measured with CL = 50pF and input rise/fall times of 20ns. Delay increases at temperature extremes: tPHL rises to 110ns at 125°C, confirming stable timing behavior across the full industrial temperature range.
Does CD4050BDT require external pull-up or pull-down resistors on unused inputs?
Yes, all unused inputs of CD4050BDT must be terminated to either VCC or VSS to prevent floating states that cause excessive supply current, erratic output behavior, or localized heating. TI recommends tying unused inputs directly to VCC or VSS using short traces - do not leave them open. This requirement applies regardless of whether the device is actively used in the circuit, as floating CMOS inputs violate the absolute maximum ratings for input current.
CD4050BDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SOIC
CD4050BDT FAQ
1.How can I place an order for CD4050BDT through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4050BDT 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 CD4050BDT reliable?
The price and inventory of CD4050BDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4050BDT is usually 5 days.
3.What payment methods are accepted for CD4050BDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4050BDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4050BDT?
CD4050BDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4050BDT 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 CD4050BDT?
For technical support, including CD4050BDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4050BDT requirements.
6.How does Aetrix verify that CD4050BDT is sourced from the original manufacturer or authorized distributors?
All CD4050BDT 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 CD4050BDT meets industry standards.
7.What is the process for return or replacement of CD4050BDT?
All CD4050BDT units undergo pre-shipment inspection (PSI). If there is an issue with CD4050BDT, 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 CD4050BDT part is unused and in its original packaging.
Return procedure for CD4050BDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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