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Home > Products > Integrated Circuits (ICs) > Logic > Multivibrators

Texas Instruments CD4047BMG4

Name: CD4047BMG4
Brand: Texas Instruments
SKU: CD4047BMG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CD4047BMG4

Manufacturer:: Texas Instruments

Category:: Multivibrators

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: CD4047BMG4.pdf

Description:: IC MULTIVIBRATOR 80NS 14SOIC

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Product details

Overview

CD4047BMG4 from Texas Instruments is a CMOS retriggerable monostable multivibrator and astable multivibrator IC with built-in oscillator, operating from 3 V to 18 V supply, delivering ±4.2 mA output drive at 5 V, with propagation delay of 120 ns typical at 10 V, and used in timing control, pulse generation, and clock signal derivation for legacy industrial logic systems.

For engineers reviewing the CD4047BMG4 datasheet, CD4047BMG4 pinout, CD4047BMG4 application, or CD4047BMG4 equivalent, this device serves as a low-power, wide-supply-range timing generator where precise duty-cycle control, external frequency adjustment via RC network, and dual-output (Q and Q̅) phase complementarity are required in non-PLL-based digital timing circuits.

Technical Context

The CD4047BMG4 integrates a Schmitt-trigger-based astable oscillator and a retriggerable monostable multivibrator in a single 14-pin SOIC package. Its internal architecture supports both free-running (astable) and triggered (monostable) modes via MODE pin selection, with independent RESET and ASTABLE/MONOSTABLE mode control logic.

It features complementary buffered outputs (Q and Q̅), a dedicated oscillator enable (OSC EN), and direct TTL/CMOS-compatible input thresholds. The oscillator frequency is set by external R and C components, with f_osc = 1/(4.4 × R × C) in astable mode, and pulse width t_w = 0.44 × R × C in monostable mode - both verified across -55°C to +125°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3 V to 18 V - enables direct interface with legacy 5 V, 12 V, and mixed-voltage logic systems without level-shifting.
Output Drive Capability	±4.2 mA at V_DD = 5 V - sufficient to directly drive TTL loads or small capacitive nodes without buffer amplification.
Astable Frequency Range	10 Hz to 1 MHz - set by external R/C; supports timing intervals from microseconds to seconds in oscillator applications.
Monostable Pulse Width	0.44 × R × C - provides predictable, RC-determined one-shot duration with no internal trimming required.
Propagation Delay	120 ns typical at V_DD = 10 V - ensures deterministic timing alignment in synchronous logic chains.
Operating Temperature	-55°C to +125°C - qualified for extended industrial and automotive under-hood environments.
Input Thresholds	V_IL = 1.5 V, V_IH = 3.5 V at V_DD = 5 V - compatible with standard TTL and CMOS logic families without interface circuitry.

Pinout & Package

CD4047BMG4 is housed in a 14-pin SOIC (D) package, 3.9 mm wide, 1.75 mm max height, with 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level (MSL) 1 - suitable for standard reflow assembly without baking.

Pin/Terminal	Circuit Role	Design Meaning
1 (ASTABLE)	Oscillator Enable Input	High enables astable mode; low disables oscillator and forces Q = LOW, Q̅ = HIGH - used for gated clock generation.
2 (MONOSTABLE)	Mode Select Input	Low selects monostable operation; high selects astable - mutually exclusive with ASTABLE pin logic.
3 (RESET)	Asynchronous Reset Input	Active-high reset forces Q = LOW, Q̅ = HIGH regardless of mode - critical for system initialization and fault recovery.
4 (C)	Timing Capacitor Terminal	Connects external capacitor to ground; sets oscillator frequency or monostable pulse width with external resistor.
5 (R)	Timing Resistor Terminal	Connects external resistor between V_DD and C pin - forms RC network defining timing constants per mode.
6 (Q̅)	Inverted Output	Complementary buffered output to Q; provides phase-inverted logic signal with same timing edge alignment.
7 (V_SS)	Ground Reference	Primary ground return for all internal logic and output drivers - must be low-impedance connection.
8–14	Not Connected / Reserved	Pins 8–13 are NC; Pin 14 is V_DD - no internal connection; avoid routing or loading to prevent parasitic coupling.
14 (V_DD)	Positive Supply Rail	Accepts 3 V to 18 V DC; decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin.

Key Features

Feature	Design Value
Dual-mode operation (astable/monostable)	Selectable via two dedicated logic inputs - eliminates need for external mode-switching logic or discrete multivibrators.
Complementary buffered outputs (Q/Q̅)	Simultaneous, matched-edge outputs reduce PCB routing complexity in flip-flop or clock-distribution circuits.
Wide supply voltage range (3–18 V)	Supports direct integration into battery-powered, 12 V industrial, and 5 V logic subsystems without regulators or level shifters.
Temperature-stable RC timing	Specified timing accuracy maintained over -55°C to +125°C - enables reliable operation in uncontrolled thermal environments.
Low quiescent current (20 µA max)	Minimizes standby power in always-on timing circuits - critical for energy-constrained remote sensors and backup systems.

Applications

LED Flasher Control	Power Sequencing Timer
Use Scenario: Generating periodic on/off cycles for indicator LEDs in panel-mounted industrial equipment. IC Role / Device Role / Timing Role: Astable multivibrator providing square-wave clock to LED driver transistor or MOSFET gate. Use Value: Eliminates need for discrete 555 timer and supporting passive network - reduces BOM count and improves long-term timing stability.	Use Scenario: Controlling sequential power-up of multiple voltage rails in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Monostable multivibrator generating fixed-duration enable pulses for DC-DC converter enable inputs. Use Value: Ensures deterministic inter-rail delay (e.g., 100 ms between 5 V and 3.3 V rails) without microcontroller intervention.
Legacy Logic Clock Derivation	Reset Pulse Generator
Use Scenario: Deriving clean, jitter-free clock signals for vintage CMOS microcontrollers or static RAM refresh circuits. IC Role / Device Role / Timing Role: Astable oscillator configured with precision R/C to generate stable 100 kHz–1 MHz clocks. Use Value: Provides rail-to-rail CMOS-compatible clock with lower jitter than RC-oscillator-based MCU internal clocks.	Use Scenario: Generating a fixed-width reset pulse upon power-up or manual reset button press in embedded instrumentation. IC Role / Device Role / Timing Role: Monostable multivibrator triggered by debounced switch or POR signal to produce 10–100 ms reset assertion. Use Value: Guarantees minimum reset pulse width compliant with legacy ASIC or FPGA requirements, independent of supply ramp rate.

LED Flasher Control

Power Sequencing Timer

Use Scenario: Generating periodic on/off cycles for indicator LEDs in panel-mounted industrial equipment.

IC Role / Device Role / Timing Role: Astable multivibrator providing square-wave clock to LED driver transistor or MOSFET gate.

Use Value: Eliminates need for discrete 555 timer and supporting passive network - reduces BOM count and improves long-term timing stability.

Use Scenario: Controlling sequential power-up of multiple voltage rails in programmable logic controllers (PLCs).

IC Role / Device Role / Timing Role: Monostable multivibrator generating fixed-duration enable pulses for DC-DC converter enable inputs.

Use Value: Ensures deterministic inter-rail delay (e.g., 100 ms between 5 V and 3.3 V rails) without microcontroller intervention.

Legacy Logic Clock Derivation

Reset Pulse Generator

Use Scenario: Deriving clean, jitter-free clock signals for vintage CMOS microcontrollers or static RAM refresh circuits.

IC Role / Device Role / Timing Role: Astable oscillator configured with precision R/C to generate stable 100 kHz–1 MHz clocks.

Use Value: Provides rail-to-rail CMOS-compatible clock with lower jitter than RC-oscillator-based MCU internal clocks.

Use Scenario: Generating a fixed-width reset pulse upon power-up or manual reset button press in embedded instrumentation.

IC Role / Device Role / Timing Role: Monostable multivibrator triggered by debounced switch or POR signal to produce 10–100 ms reset assertion.

Use Value: Guarantees minimum reset pulse width compliant with legacy ASIC or FPGA requirements, independent of supply ramp rate.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multivibrator timing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CD4047BE	Same core functionality; PDIP-14 package, SNPB lead finish, no RoHS compliance.	Preferred for through-hole prototyping or legacy repair where SOIC rework is impractical.	Select CD4047BE when hand-soldering or board-level repair requires axial-leaded compatibility and Pb-based solder process.
CD4047BM96	Identical SOIC-14 function and pinout; differs only in tape-and-reel packaging (2500 pcs/reel vs. 2000 pcs/reel for CD4047BMG4).	Used in high-volume SMT production lines requiring different reel size or carrier specifications.	Choose CD4047BM96 if your SMT line is calibrated for 2500-piece reels or requires specific tape width (16.4 mm) and cavity dimensions.

Compared with CD4047BE and CD4047BM96, the CD4047BMG4 offers RoHS-compliant NiPdAu plating and MSL-1 reflow readiness in a 2000-piece TSSOP-compatible tape format - making it optimal for modern automated assembly while retaining full functional equivalence.

Availability

CD4047BMG4 is available at Aetrix Electronics and suitable for industrial control panels, legacy system upgrades, and power management modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for CD4047BMG4 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 over 90 years of innovation in industrial, automotive, and communications markets.

The CD4047B series belongs to TI's legacy CMOS logic portfolio, designed specifically for robust, low-power timing generation in harsh-environment applications where reliability and wide-voltage operation outweigh advanced feature integration.

FAQ

What is the maximum recommended supply voltage for CD4047BMG4?

The CD4047BMG4 is rated for operation up to 18 V DC. Exceeding this voltage risks permanent damage to internal oxide layers and may cause latch-up. For designs operating near the upper limit, ensure V_DD ripple remains below ±0.5 V and include transient suppression if connected to inductive loads. The CD4047BMG4 maintains full timing specification compliance across its entire 3 V to 18 V range.

Does CD4047BMG4 support both astable and monostable modes simultaneously?

No - the CD4047BMG4 operates exclusively in one mode at a time, selected by the logic states of the ASTABLE and MONOSTABLE pins. When ASTABLE = HIGH and MONOSTABLE = LOW, the device runs in astable mode; when ASTABLE = LOW and MONOSTABLE = LOW, it enters monostable mode. Both pins HIGH is undefined and must be avoided. The CD4047BMG4 does not support concurrent dual-mode operation.

Can CD4047BMG4 drive a piezoelectric buzzer directly?

Yes - the CD4047BMG4 can drive low-current piezoelectric buzzers (≤5 mA load) directly using its Q or Q̅ output, provided the buzzer's rated voltage falls within the CD4047BMG4's supply range. For higher-current or resonant-type buzzers, an external NPN transistor or small MOSFET is required. Always verify buzzer impedance and peak current draw against the CD4047BMG4's ±4.2 mA output spec at the chosen V_DD.

Is CD4047BMG4 pin-compatible with the original CD4047B from Harris Semiconductor?

Yes - the CD4047BMG4 retains identical pinout, electrical characteristics, and functional behavior as the original Harris CD4047B, including timing equations, input thresholds, and output drive strength. TI acquired Harris' logic portfolio and maintains full backward compatibility. No PCB layout changes are needed when replacing Harris CD4047B with CD4047BMG4 in SOIC-14 footprint designs.

What is the minimum external capacitor value supported for stable CD4047BMG4 operation?

The CD4047BMG4 specifies stable operation down to 10 pF for the timing capacitor (C pin), though values below 100 pF increase sensitivity to stray capacitance and noise. For production designs, TI recommends ≥100 pF with tight-tolerance (±5%) NP0/C0G ceramic capacitors. At 10 pF, the minimum usable resistor value is ~10 kΩ to maintain timing accuracy; the CD4047BMG4's internal comparator offsets are characterized for C ≥ 10 pF in the official datasheet.

CD4047BMG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 4000B

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Logic Type:: Astable, Monostable

Independent Circuits:: 1

Schmitt Trigger Input:: No

Propagation Delay:: 80 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:: Surface Mount

Supplier Device Package:: 14-SOIC

CD4047BMG4 FAQ

1.How can I place an order for CD4047BMG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for CD4047BMG4 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 CD4047BMG4 reliable?

The price and inventory of CD4047BMG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4047BMG4 is usually 5 days.

3.What payment methods are accepted for CD4047BMG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4047BMG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CD4047BMG4?

CD4047BMG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CD4047BMG4 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 CD4047BMG4?

For technical support, including CD4047BMG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4047BMG4 requirements.

6.How does Aetrix verify that CD4047BMG4 is sourced from the original manufacturer or authorized distributors?

All CD4047BMG4 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 CD4047BMG4 meets industry standards.

7.What is the process for return or replacement of CD4047BMG4?

All CD4047BMG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4047BMG4, 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 CD4047BMG4 part is unused and in its original packaging.

Return procedure for CD4047BMG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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