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
Key Features
- 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
Applications
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) |
Alternate & Equivalent Parts
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.
Related Guides
How to Choose a 3528 SMD Indicator LED for Blue Status Lighting: Selection Guide
A practical 3528 SMD indicator LED selection guide using 150141BS73100 and related Wurth 150141 variants for blue status lighting.
Jul 5, 2026
BAS70KFILM Design Guide for Low-Leakage Signal Clamping and RF Detector Inputs
Practical BAS70KFILM design guidance for signal clamps, RF detector inputs, leakage control, capacitance, layout, and sourcing alternatives.
Jul 5, 2026
How to Choose a BAS70 Schottky Diode for Signal Clamping: Selection Guide
A practical BAS70KFILM and BAS70-family Schottky diode selection guide for signal clamping, RF detection, leakage, and topology choices.
Jul 4, 2026
AMC1202DWVR Design Guide for Isolated Current Sensing
Practical AMC1202DWVR design guide covering shunt sizing, isolation layout, input filtering, ADC scaling, and sourcing choices.
Jul 4, 2026
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.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”