SN74HC4020NS Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
14-stage binary ripple counter with asynchronous master reset, operating from 2 V to 6 V supply in a 16-pin SOIC package. Features 14 parallel outputs at up to 42 MHz. From $0.35 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC4020NS Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74HC4020NS?
- 14-stage binary ripple counter with 14 parallel output taps for flexible frequency division by powers of 2 up to 16384
- Asynchronous master reset input for immediate counter clearing without waiting for clock edges in real-time systems
- Wide 2 V to 6 V supply voltage range in 16-pin SOIC package compatible with both 3.3 V and 5 V logic systems
What is SN74HC4020NS used for?
The SN74HC4020NS is used in digital timing and frequency division circuits, generating clock frequencies from a high-frequency oscillator by dividing by 2, 4, 8, up to 16384. It is common in microcontroller-based systems requiring multiple sub-rate clock signals for peripherals operating at different speeds. Industrial control systems and scientific instruments also use it to generate precise time-base signals from a single reference oscillator.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SN74HC4020NS datasheet?
SN74HC4020NS Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74HC4020NS?
Compatible alternatives and drop-in replacements for SN74HC4020NS:
Binary Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 12-Bit, Up Direction, CMOS, PDSO16
Binary Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 14-Bit, Up Direction, CMOS, PDSO16
Binary Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 12-Bit, Up Direction, CMOS, PDSO16
Binary Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 12-Bit, Up Direction, CMOS, PDSO16
Binary Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 12-Bit, Up Direction, CMOS, PDSO16
Frequently Asked Questions
How many counter output stages does the SN74HC4020NS provide, and what is the maximum division ratio?
The SN74HC4020NS provides 14 binary counter stages, delivering a maximum frequency division ratio of 2^14 = 16384. With a 42 MHz input clock, the Q14 output produces a 2.56 kHz signal, enabling a single IC to replace multiple discrete frequency divider stages in timing circuits.
What is the maximum clock frequency for reliable SN74HC4020NS operation at 5 V, and how does it change at 3.3 V?
At 5 V supply, the SN74HC4020NS operates reliably at up to 42 MHz clock frequency. At 3.3 V supply, the maximum clock frequency reduces to approximately 20 MHz due to longer propagation delays. Designers should verify timing margins at the target supply voltage to avoid missed counts in high-speed applications.
Which timing and clock generation applications are best suited for SN74HC4020NS in embedded systems?
SN74HC4020NS is ideal for generating multiple sub-rate clocks from a single oscillator in embedded systems, such as 1 MHz, 500 kHz, 250 kHz, and 125 kHz from a 2 MHz reference using the Q1 through Q4 outputs. It is also used in real-time clock circuits, watchdog timer generation, and LED blink controllers requiring sub-second intervals from a 32.768 kHz crystal.
When would a designer choose SN74HC4020NS instead of a programmable timer IC like NE555 for frequency division?
Choose SN74HC4020NS when you need simultaneous access to 14 binary-divided frequencies from a single stable reference clock, which NE555 cannot provide. The SN74HC4020NS outputs are phase-coherent and synchronized to the input, maintaining frequency accuracy to within 1 clock cycle, whereas NE555 generates frequencies with RC-dependent tolerance of 5% or more.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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