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Texas Instruments CD4050BE
- Part No.:
- CD4050BE
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4050BE.pdf
- Description:
- IC BUFFER NON-INVERT 18V 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,951
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Product details
Overview
CD4050BE 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 output sink current at VCC = 5V and TA = 25°C, features ≤0.05V VOL (max), and supports −55°C to +125°C industrial temperature range - used in voltage translation interfaces for microcontroller I/O expansion and legacy TTL subsystem interfacing.
For engineers reviewing the CD4050BE datasheet, CD4050BE pinout, CD4050BE application, or CD4050BE equivalent, this page provides verified functional role, confirmed DC/AC electrical specs, validated PDIP-16 package mapping, real-world use cases with design meaning, and two technically documented alternative parts with explicit functional and application differences.
Technical Context
The CD4050BE implements six independent noninverting buffer stages in a single monolithic CMOS die, each with symmetrical input/output characteristics and rail-to-rail voltage translation capability. Its input high threshold (VIH) scales with VCC - e.g., 3.5V min at VCC = 5V, 7V min at VCC = 10V - enabling reliable level shifting without external biasing.
It uses standard CMOS transmission-gate architecture with no internal clamping diodes to VCC, requiring input signals to remain ≤ VCC. Output drive strength is optimized for direct TTL/DTL fanout (2 loads), with propagation delays of 70–140ns (tPLH) and 55–110ns (tPHL) at 5V, and transition times of 80–160ns (tTLH) and 30–60ns (tTHL) under CL = 50pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 18V - enables operation across battery, industrial, and mixed-voltage systems without level shifters. |
| Output Sink Current (IOL) | ≥3.2mA at VCC = 5V, VOUT = 0.4V - sufficient to directly drive two standard TTL inputs. |
| Output Low Voltage (VOL) | ≤0.05V max at VCC = 5V - ensures robust noise margin for TTL-compatible low-state recognition. |
| Input Leakage Current | ≤0.1µA at 18V, −55°C to +125°C - minimizes loading on high-impedance sensor or analog signal sources. |
| Propagation Delay (tPLH) | 70–140ns at VCC = 5V, CL = 50pF - defines maximum operating frequency in synchronous digital interfaces. |
| Operating Temperature | −55°C to +125°C - qualified for automotive under-hood, industrial control, and military-grade environments. |
| Input Capacitance | 5–7.5pF - low capacitive loading preserves signal integrity in high-speed or high-impedance routing. |
Pinout & Package
CD4050BE is supplied in a 16-pin plastic dual in-line package (PDIP, N package), measuring 6.35mm × 19.30mm, with 0.1-inch lead pitch and through-hole mounting. Pin 1 is top-left corner (notch side), with VCC at pin 1 and VSS at pin 8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Positive supply | Single power rail input; must be bypassed with 0.1µF capacitor near pin for stable operation. |
| 2 (G) | Noninverting output 1 | Buffered replica of input A; drives TTL/DTL loads directly with 3.2mA sink capability. |
| 3 (A) | Input 1 | CMOS-compatible input; VIH = 3.5V min at VCC = 5V; must not exceed VCC due to lack of overvoltage protection. |
| 4 (H) | Noninverting output 2 | Buffered replica of input B; electrically identical to G, supporting parallel channel expansion. |
| 5 (B) | Input 2 | Independent CMOS input with same VIH/VIL thresholds as A; usable for multi-channel signal conditioning. |
| 6 (I) | Noninverting output 3 | Output stage for input C; shares same DC/AC specs as G and H - consistent timing and drive across all six buffers. |
| 7 (C) | Input 3 | Third buffered input; low 100nA leakage at 25°C enables use with high-Z analog switches or sensors. |
| 8 (VSS) | Negative supply / ground | Reference return path for all inputs and outputs; requires low-impedance connection to system ground plane. |
| 9 (D) | Input 4 | Fourth independent input; supports daisy-chained logic translation where multiple voltage domains interface. |
| 10 (J) | Noninverting output 4 | Output for D; maintains VOL ≤ 0.05V even at 125°C - critical for thermal-stable industrial control I/O. |
| 11 (E) | Input 5 | Fifth input; VIH = 3.5V min ensures compatibility with 3.3V MCU GPIOs when VCC = 5V. |
| 12 (K) | Noninverting output 5 | Output for E; full 6-channel buffering allows simultaneous translation of parallel data bus lines. |
| 13, 16 (NC) | No connection | Unbonded pins; no internal connection - may be left unconnected or grounded per layout convenience. |
| 14 (F) | Input 6 | Sixth and final input; completes hex-buffer functionality for applications like 6-bit ADC/DAC interface translation. |
| 15 (L) | Noninverting output 6 | Final output stage; matches all other outputs in VOH ≥ 4.95V at VCC = 5V - guarantees TTL-high recognition. |
Key Features
| Feature | Design Value |
|---|---|
| Noninverting hex buffer architecture | Six independent, identical buffer channels enable parallel signal translation without cross-talk or timing skew. |
| Voltage-level translation (3V–18V) | Single-supply operation eliminates need for dual-rail regulators or external level-shifting circuitry. |
| High sink current (≥3.2mA @ 5V) | Directly drives two TTL loads per channel - reduces component count in mixed-logic-system interfaces. |
| Low input leakage (≤0.1µA) | Preserves signal integrity when interfacing with high-impedance sources such as piezoelectric sensors or photodiode amps. |
| Wide temperature range (−55°C to +125°C) | Validated for deployment in harsh environments including automotive engine control units and industrial PLC backplanes. |
| Rail-to-rail output swing | VOH ≥ 4.95V and VOL ≤ 0.05V at VCC = 5V ensure full TTL logic margin compliance across temperature extremes. |
Applications
| Microcontroller I/O Expansion | TTL Subsystem Interface |
|---|---|
Use Scenario: A 3.3V microcontroller needs to drive six 5V TTL inputs in a legacy test fixture. IC Role / Device Role / Timing Role: CD4050BE acts as a noninverting level translator and current booster, accepting 3.3V CMOS logic and delivering 5V-compatible outputs with TTL-fanout strength. Use Value: Eliminates need for six discrete MOSFET translators or dedicated level-shifter ICs - reduces BOM cost and PCB area by >40%. | Use Scenario: An industrial controller uses 12V CMOS logic to interface with 5V TTL-based relay drivers. IC Role / Device Role / Timing Role: CD4050BE performs high-to-low voltage conversion while sourcing/sinking sufficient current to meet TTL VIH/VIL thresholds reliably. Use Value: Enables direct interconnection without resistor-divider networks - avoids timing skew and input threshold uncertainty inherent in passive solutions. |
| High-Voltage Sensor Signal Conditioning | Legacy System Logic Translation |
Use Scenario: A 15V analog front-end generates digital status flags that must be read by a 5V FPGA. IC Role / Device Role / Timing Role: CD4050BE buffers and down-translates 15V logic signals to 5V-compatible levels, maintaining fast edge rates (tPLH ≤ 30ns at 15V). Use Value: Preserves signal fidelity and timing accuracy - avoids pulse distortion caused by RC-based attenuators or slow optocouplers. | Use Scenario: A vintage instrumentation system with CD4010B-based logic requires replacement with modern, pin-compatible components. IC Role / Device Role / Timing Role: CD4050BE serves as a drop-in functional replacement for CD4010B, retaining identical pinout and electrical behavior. Use Value: Enables field upgrades without PCB rework - extends service life of legacy equipment while improving reliability and availability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar noninverting hex buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4010BE | Same pinout and function but older generation; higher quiescent current (up to 100µA vs. 0.02µA typ. for CD4050BE); no 18V rating. | Limited to ≤15V operation; unsuitable for 18V industrial rails or extended-temperature deployments. | Select CD4010BE only for legacy board repair where CD4050BE is unavailable; verify VCC and temp range compliance. |
| SN74HC04N | Hex inverter (not noninverting); 2V–6V supply only; 5.2mA IOL at 5V; faster (tPLH = 15ns typ.) but no level translation above 6V. | Cannot translate >6V signals; requires redesign if input exceeds 6V or if noninverting logic is mandatory. | Choose SN74HC04N only for 5V-only systems needing higher speed; add external inverters if noninverting function required. |
Compared with CD4010BE, CD4050BE offers lower power, wider voltage range, and improved temperature tolerance; compared with SN74HC04N, it trades speed for universal level translation capability - making CD4050BE optimal for mixed-voltage, high-reliability, or legacy-compatible designs.
Availability
CD4050BE is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, legacy equipment refurbishment, and mixed-voltage embedded interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for CD4050BE 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and logic ICs for industrial, automotive, and consumer markets.
The CD4050BE belongs to TI's legacy CMOS logic family, engineered for robust voltage translation and interoperability between disparate logic families in resource-constrained or high-reliability systems.
FAQ
What is the maximum supply voltage rating for CD4050BE?
The CD4050BE has an absolute maximum supply voltage (VCC to VSS) of 20V, with recommended operating range from 3V to 18V. At 18V, it maintains ≤0.1µA input leakage across −55°C to +125°C and delivers ≥24mA output sink current - making CD4050BE suitable for high-voltage industrial sensing and actuation interfaces where standard 5V logic cannot operate.
Is CD4050BE pin-compatible with CD4010BE?
Yes, CD4050BE is pin-compatible with CD4010BE and functions as a direct replacement. Both share identical PDIP-16 pinout, terminal assignments, and functional truth table. CD4050BE improves upon CD4010BE with lower quiescent current, extended 18V rating, and −55°C to +125°C qualification - allowing seamless upgrade in existing CD4010BE-based designs without layout changes.
Can CD4050BE translate 12V logic to 5V TTL levels?
Yes, CD4050BE can translate 12V CMOS logic to 5V TTL-compatible outputs when powered at VCC = 5V. With VIH(min) = 7V at VCC = 10V and scalable thresholds, its input structure accepts voltages up to VCC without damage. When VCC = 5V, CD4050BE outputs VOH ≥ 4.95V and VOL ≤ 0.05V - meeting TTL VIH(≥2.0V) and VIL(≤0.8V) requirements while sinking ≥3.2mA per channel.
Does CD4050BE include input protection diodes to VCC?
No, CD4050BE does not include input clamp diodes to VCC. Its inputs are standard CMOS gates without overvoltage protection, so applied input voltage must not exceed VCC. Exceeding VCC risks latch-up or permanent damage. For systems with potential input overshoot, external series resistors or Schottky clamps to VCC are recommended - unlike some newer logic families, CD4050BE relies on proper system-level voltage management.
What is the typical propagation delay of CD4050BE at 5V supply?
At VCC = 5V, CL = 50pF, and TA = 25°C, CD4050BE exhibits tPLH (low-to-high) of 70–140ns and tPHL (high-to-low) of 55–110ns. These values reflect worst-case process/voltage/temperature corners; typical performance is centered within this range. The delay is load-dependent - reducing CL to 15pF lowers tPLH to ~45ns - enabling use in moderate-speed digital control loops up to ~5MHz.
CD4050BE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
CD4050BE FAQ
1.How can I place an order for CD4050BE through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4050BE 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 CD4050BE reliable?
The price and inventory of CD4050BE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4050BE is usually 5 days.
3.What payment methods are accepted for CD4050BE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4050BE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4050BE?
CD4050BE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4050BE 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 CD4050BE?
For technical support, including CD4050BE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4050BE requirements.
6.How does Aetrix verify that CD4050BE is sourced from the original manufacturer or authorized distributors?
All CD4050BE 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 CD4050BE meets industry standards.
7.What is the process for return or replacement of CD4050BE?
All CD4050BE units undergo pre-shipment inspection (PSI). If there is an issue with CD4050BE, 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 CD4050BE part is unused and in its original packaging.
Return procedure for CD4050BE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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