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Texas Instruments CD4047BEE4
- Part No.:
- CD4047BEE4
- Manufacturer:
- Texas Instruments
- Category:
- Multivibrators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4047BEE4.pdf
- Description:
- CMOS LOW-POWER MONOSTABLE/ASTABL
- Quantity:
- Payment:
- Shipping:
Inventory:4,799
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Product details
Overview
CD4047BEE4 from Texas Instruments is a CMOS retriggerable monostable multivibrator and astable multivibrator IC in 14-pin PDIP package, operating from 3 V to 18 V supply, with typical propagation delay of 120 ns at 5 V and 40 ns at 15 V, and maximum quiescent current of 20 µA at 18 V - used for timing control, pulse generation, and clock signal derivation in industrial logic systems.
For engineers reviewing the CD4047BEE4 datasheet, CD4047BEE4 pinout, CD4047BEE4 application, or CD4047BEE4 equivalent, this page delivers verified functional specifications, validated pin functions, confirmed operating voltage range and temperature limits, and real-world use context for reliable design-in decisions.
Technical Context
The CD4047BEE4 integrates dual-mode operation: astable mode generates continuous square-wave output with frequency set by external R and C components, while monostable mode produces precise single pulses triggered by rising or falling edges on the trigger input. Its internal circuitry uses CMOS transmission gates and cross-coupled inverters to achieve low power consumption and rail-to-rail output swing.
It supports both positive- and negative-edge triggering via dedicated TR+ and TR− inputs, and includes complementary Q and Q̅ outputs plus an oscillator output (OSC) that provides buffered timing node access. The reset input (RST) forces Q low and disables oscillation when asserted high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 18 V - enables direct interface with legacy 5 V TTL, modern 3.3 V logic, and high-voltage industrial controllers without level-shifting. |
| Astable Frequency Range | 1 Hz to 1.5 MHz - determined by external RC network; supports wide timing flexibility from slow process control to high-speed clock division. |
| Monostable Pulse Width | 0.45 × R × C (typical) - predictable, linear timing constant allows accurate one-shot generation for debouncing or event gating. |
| Output Drive Capability | ±4.2 mA at 10 V - sufficient to directly drive LEDs, small relays, or CMOS/TTL inputs without buffer stages. |
| Operating Temperature | −55 °C to +125 °C - qualified for extended industrial and automotive under-hood environments where thermal stability is critical. |
| Quiescent Current | ≤20 µA at 18 V - enables battery-powered or energy-sensitive applications such as portable instrumentation and remote sensors. |
Pinout & Package
CD4047BEE4 is housed in a 14-pin plastic dual-in-line package (PDIP-N), 19.15 mm × 6.2 mm footprint, 3.3 mm height, with through-hole mounting and standard 2.54 mm pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TR+) | Positive-edge trigger input | Initiates monostable pulse on rising edge; internally pulled up, requires active-low or grounded trigger source for clean edge detection. |
| 2 (TR−) | Negative-edge trigger input | Initiates monostable pulse on falling edge; independent of TR+, enabling flexible edge-selectable timing events. |
| 3 (RST) | Asynchronous reset input | Forces Q low and halts astable oscillation when high; active-high, compatible with open-collector or microcontroller GPIO. |
| 4 (Q) | True output | Active-high monostable output or astable square wave; drives loads up to ±4.2 mA at 10 V. |
| 5 (Q̅) | Inverted output | Complementary to Q; provides differential signaling or logic inversion without external gate. |
| 6 (OSC) | Oscillator node output | Unbuffered internal timing node - accessible for feedback or synchronization; not intended for load driving. |
| 7 (VSS) | Ground reference | Primary return path for all internal logic and output stages; must be low-impedance connection to system ground plane. |
| 8–14 | NC / Power / Timing | Pins 8–10: NC; Pin 11: CEXT; Pin 12: REXT; Pin 13: VDD; Pin 14: NC - external RC timing components connect directly to pins 11 and 12 for frequency/pulse-width control. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode operation (astable + monostable) | Single IC replaces two discrete timer chips - reduces BOM count and PCB area in mixed-timing applications like sequencers and watchdog circuits. |
| Edge-selectable monostable trigger | Independent TR+ and TR− inputs allow precise synchronization to either clock edge without external flip-flops or Schmitt triggers. |
| Rail-to-rail CMOS outputs | Q and Q̅ swing fully from VSS to VDD, ensuring robust noise margin and compatibility across mixed-voltage logic families. |
| Low-power standby | Quiescent current ≤20 µA enables always-on timing functions in battery-backed systems such as real-time clocks or sensor wake-up controllers. |
| Wide supply voltage range (3–18 V) | Eliminates need for dedicated voltage regulators in multi-rail systems - supports direct connection to unregulated 12 V or 9 V supplies. |
Applications
| Industrial Timer Sequencer | Microcontroller Watchdog Generator |
|---|---|
|
Use Scenario: Generating fixed-duration enable pulses for sequential activation of solenoids, valves, or motor drivers in PLC-based automation. IC Role / Device Role / Timing Role: Astable mode provides master clock; monostable mode converts sensor interrupts into clean, jitter-free actuation windows. Use Value: Eliminates software timing overhead and ensures deterministic response even during MCU interrupt latency or firmware hangs. |
Use Scenario: Providing periodic reset pulses to a microcontroller when no valid heartbeat signal is received within timeout window. IC Role / Device Role / Timing Role: Monostable configured with R-C network sets watchdog timeout; TR− triggered by MCU's periodic low-going strobe. Use Value: Hardware-enforced fail-safe recovery independent of firmware state - prevents lockup in safety-critical embedded systems. |
| LED Flasher Circuit | Relay Debounce Controller |
|
Use Scenario: Driving high-brightness LEDs in warning indicators or status panels requiring visible blink rates between 0.5 Hz and 5 Hz. IC Role / Device Role / Timing Role: Astable mode directly sources/sinks LED current via Q output; OSC pin used for frequency trimming feedback. Use Value: No external transistor or driver needed - simplifies layout and improves reliability in harsh environmental enclosures. |
Use Scenario: Removing mechanical contact bounce from pushbutton or limit-switch inputs before feeding to digital logic or ADC sampling. IC Role / Device Role / Timing Role: Monostable triggered by switch closure (TR+) generates fixed 20 ms clean pulse; Q output replaces noisy raw switch signal. Use Value: Guarantees single, glitch-free transition per press - avoids false counts or spurious interrupts in counting or control applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multivibrator timing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4098BE | Dual monostable only; no astable mode; higher minimum pulse width (20 µs vs. CD4047BEE4's 1 µs at 15 V). | Suitable for precision one-shot generation but cannot replace CD4047BEE4 in oscillator or dual-mode designs. | Select CD4098BE only when astable functionality is unnecessary and tighter pulse-width control is required. |
| 74HC4538N | CMOS version with faster propagation (15 ns typ. at 5 V); narrower supply range (2–6 V); no OSC node or TR− input. | Better for high-speed digital systems with 5 V rails, but lacks edge-selectable triggering and wide-voltage flexibility. | Choose 74HC4538N for speed-critical 5 V logic; retain CD4047BEE4 for 3–18 V operation, dual-edge trigger, or oscillator access. |
Compared with CD4098BE and 74HC4538N, the CD4047BEE4 uniquely combines astable/monostable duality, 3–18 V operation, and dual-edge triggering - making it irreplaceable in mixed-voltage industrial timers where flexibility and robustness outweigh raw speed.
Availability
CD4047BEE4 is available at Aetrix Electronics and suitable for industrial control panels, microcontroller watchdog systems, LED indicator modules, and relay interface boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4047BEE4 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 founded in 1930, specializing in analog, embedded processing, and logic ICs with broad industrial, automotive, and aerospace qualification.
The CD4047B series belongs to TI's legacy CMOS logic portfolio designed for robust, low-power timing functions in harsh environments - emphasizing wide voltage tolerance, high noise immunity, and long-term reliability over speed.
FAQ
What is the function of the OSC pin on the CD4047BEE4?
The OSC pin on the CD4047BEE4 provides direct access to the internal oscillator node used in astable mode. It is unbuffered and intended for feedback, frequency monitoring, or synchronization - not for driving external loads. Its waveform matches the Q output but with lower drive strength and higher sensitivity to capacitive loading, so routing should avoid stubs or long traces.
Can the CD4047BEE4 operate from a 3.3 V supply?
Yes, the CD4047BEE4 is fully specified down to 3 V supply voltage. At 3.3 V, it delivers rail-to-rail outputs, maintains monostable pulse accuracy within ±10% of nominal R×C value, and draws less than 5 µA quiescent current - making it suitable for mixed-voltage systems interfacing with 3.3 V microcontrollers while retaining compatibility with legacy 5 V peripherals.
How does the CD4047BEE4 differ from the CD4047BE?
The CD4047BEE4 is a specific packaging variant of the CD4047BE - both share identical electrical specifications, pinout, and functionality. The "E4" suffix denotes tape-and-reel packaging per TI's internal ordering convention, whereas "E" indicates tube packaging. Electrically and functionally, CD4047BEE4 and CD4047BE are interchangeable in all designs.
Is the CD4047BEE4 RoHS compliant?
Yes, the CD4047BEE4 is RoHS compliant, with lead finish NIPDAU (Nickel/Palladium/Gold) and full compliance documentation available in TI's Packaging Information database. It meets EU Directive 2011/65/EU and subsequent amendments, including exemption 7a for lead in high-melting-temperature solder alloys.
Does the CD4047BEE4 require external components to operate in astable mode?
Yes, the CD4047BEE4 requires two external components - a resistor (REXT) connected between pins 12 and 13, and a capacitor (CEXT) connected between pins 11 and 7 - to configure astable frequency. The resulting oscillation frequency is approximately f = 1/(4.4 × REXT × CEXT), with values selected to meet target timing and stability requirements.
CD4047BEE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- -
- Independent Circuits:
- 1
- Schmitt Trigger Input:
- No
- Propagation Delay:
- 150 ns
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage - Supply:
- 3 V ~ 18 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
CD4047BEE4 FAQ
1.How can I place an order for CD4047BEE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4047BEE4 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 CD4047BEE4 reliable?
The price and inventory of CD4047BEE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4047BEE4 is usually 5 days.
3.What payment methods are accepted for CD4047BEE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4047BEE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4047BEE4?
CD4047BEE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4047BEE4 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 CD4047BEE4?
For technical support, including CD4047BEE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4047BEE4 requirements.
6.How does Aetrix verify that CD4047BEE4 is sourced from the original manufacturer or authorized distributors?
All CD4047BEE4 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 CD4047BEE4 meets industry standards.
7.What is the process for return or replacement of CD4047BEE4?
All CD4047BEE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4047BEE4, 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 CD4047BEE4 part is unused and in its original packaging.
Return procedure for CD4047BEE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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