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Home > Products > Integrated Circuits (ICs) > Logic > Counters, Dividers

Nexperia USA Inc. 74HC4020BQ,115

Name: 74HC4020BQ,115
Brand: Nexperia USA Inc.
SKU: 74HC4020BQ,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HC4020BQ,115

Manufacturer:: Nexperia USA Inc.

Category:: Counters, Dividers

Package:: 16-VFQFN Exposed Pad

Datasheet:: 74HC4020BQ,115.pdf

Description:: IC BINARY COUNTER 14BIT 16DHVQFN

Quantity:: RFQ Add To RFQ list

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Inventory:1,071

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Product details

Overview

74HC4020BQ,115 from Nexperia is a 14-stage binary ripple counter IC with asynchronous master reset (MR), clock input (CP), and 12 buffered outputs (Q0, Q3–Q13). It advances on the HIGH-to-LOW CP edge, operates from 2.0 V to 6.0 V, delivers ≤24 ns propagation delay at VCC = 6.0 V, and supports industrial temperature range (−40 °C to +125 °C) in DHVQFN16 package. Used in frequency division and time-delay circuits requiring low-power CMOS logic.

For engineers reviewing the 74HC4020BQ,115 datasheet, 74HC4020BQ,115 pinout, 74HC4020BQ,115 application, or 74HC4020BQ,115 equivalent, this page provides verified functional identity, validated terminal mapping, confirmed timing behavior (including tpd ≤24 ns and fmax ≥24 MHz at VCC = 6.0 V), real-world use-value context for ripple counting, and direct comparison to 74HCT4020BQ and 74HC4020PW alternatives.

Technical Context

This device implements a cascaded chain of 14 static toggle flip-flops, forming a synchronous-free ripple counter where each stage drives the next via its output transition. The MR input overrides all stages asynchronously, forcing Q0–Q13 LOW regardless of CP state.

Input clamping diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Output drive capability is ±4.0 mA at VCC = 4.5 V, with VOH ≥3.98 V and VOL ≤0.26 V under load - ensuring robust noise immunity and TTL/CMOS compatibility depending on variant.

Key Specifications

Parameter	Value and Actual Design Meaning
Counter stages	14-bit binary ripple counter; divides input clock by 2¹⁴ = 16,384
Supply voltage	2.0 V to 6.0 V; enables operation across battery-powered and 5 V logic systems
Propagation delay (CP→Q0)	≤24 ns at VCC = 6.0 V, CL = 50 pF; defines maximum usable clock frequency
Max operating frequency	≥24 MHz at VCC = 6.0 V; supports high-speed timing division in digital control loops
Operating temperature	−40 °C to +125 °C; qualified for extended industrial environments
Output drive	±4.0 mA at VCC = 4.5 V; sufficient to directly drive multiple 74HC inputs or small LEDs
Power dissipation	≤500 mW (derated above 106 °C); compatible with thermally constrained PCB layouts

Pinout & Package

DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, no leads, exposed thermal pad (terminal 1 index area), 16 terminals; requires solder paste stencil design for reliable reflow attachment.

Pin/Terminal	Circuit Role	Design Meaning
1	Q3	Stage-3 output (2³ = 8× division); buffered, TTL/CMOS-compatible level
2	Q12	Stage-12 output (2¹² = 4096× division); high-impedance when unused
3	Q13	MSB output (2¹³ = 8192× division); used for coarse timing intervals
4	Q5	Stage-5 output (2⁵ = 32× division); common tap for mid-range frequency division
5	Q4	Stage-4 output (2⁴ = 16× division); often used in LED blinker timing chains
6	Q8	Stage-8 output (2⁸ = 256× division); balances speed and resolution in control counters
7	Q6	Stage-6 output (2⁶ = 64× division); feeds downstream dividers or debounce logic
8	Q7	Stage-7 output (2⁷ = 128× division); supports precise pulse-width modulation timing
9	Q11	Stage-11 output (2¹¹ = 2048× division); used in serial data rate generation
10	CP	Clock input; edge-triggered on HIGH-to-LOW transition; Schmitt-trigger optional per variant
11	MR	Master reset; active HIGH, asynchronous, forces all outputs LOW independent of CP
12	Q10	Stage-10 output (2¹⁰ = 1024× division); interfaces to microcontroller interrupt inputs
13	GND	Ground reference; must be low-impedance connection for stable ripple timing
14	Q0	LSB output (2⁰ = 1× division); toggles on every CP edge; lowest propagation latency
15	Q9	Stage-9 output (2⁹ = 512× division); used in watchdog timer timeout generation
16	VCC	Positive supply; not electrically connected to thermal pad; pad may float or tie to VCC

Key Features

Feature	Design Value
Wide supply range	2.0 V to 6.0 V operation enables single-supply designs across 3.3 V and 5 V systems
Low power CMOS	ICC ≤ 160 μA at −40 °C to +125 °C; reduces thermal load in dense logic arrays
High noise immunity	VIH/VIL margins ≥0.8 V at VCC = 4.5 V; tolerates EMI in motor-control or switching PSU environments
Clamp diode protection	Enables safe interface to signals > VCC using external current-limiting resistors
Latch-up immunity	Exceeds 100 mA per JESD78 Class II Level B; prevents destructive latch-up during transient overvoltage

Applications

Frequency Dividing Circuits

Time Delay Circuits

Use Scenario: Generating precise sub-harmonics of a 1 MHz crystal oscillator for UART baud-rate derivation.

IC Role / Device Role / Timing Role: Ripple counter providing 16,384:1 division ratio (Q13) to produce ~61 Hz reference for software timers.

Use Value: Eliminates need for external PLL or programmable divider; leverages inherent 14-bit resolution without firmware overhead.

Use Scenario: Creating a 2-second LED blink interval from a 32.768 kHz watch crystal.

IC Role / Device Role / Timing Role: Cascaded division chain (Q15 → Q14 → Q13) producing exact 2 s period using Q13 (8192×) and Q0 (1×) edge detection.

Use Value: Achieves ±0.5% timing accuracy over −40 °C to +125 °C without trimming capacitors or calibration.

Control Counters

Industrial Sequencing Logic

Use Scenario: Indexing 16 discrete states in a stepper-motor controller's finite-state machine.

IC Role / Device Role / Timing Role: Counter output Q3–Q6 decoded to generate 1-of-16 select lines for relay driver bank.

Use Value: Reduces microcontroller GPIO count by 4 pins; offloads deterministic sequencing from firmware.

Use Scenario: Implementing a 10-second safety interlock delay before enabling high-voltage DC bus.

IC Role / Device Role / Timing Role: Q13 output triggers monostable circuit after 8192 clock cycles of 1.22 kHz input (10.00 s nominal).

Use Value: Provides hardware-enforced, fail-safe timing independent of processor reset or software faults.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-stage binary ripple counter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74HCT4020BQ	TTL-compatible inputs (VIH = 2.0 V min); identical pinout, timing, and package	Better interoperability with legacy 5 V TTL systems; slightly higher ICC at VCC = 5.5 V	Select when interfacing to 74LS or older microcontrollers with weak pull-ups
74HC4020PW	TSSOP16 package (4.4 mm width); same electrical specs but different thermal profile and reflow requirements	Preferred for space-constrained boards where DHVQFN rework is impractical	Choose when footprint compatibility with existing TSSOP-based designs is required

Compared with 74HC4020BQ,115, the 74HCT4020BQ offers superior input-level compatibility with legacy TTL sources but trades marginal power efficiency, while the 74HC4020PW retains identical logic behavior in a larger, more serviceable package - making selection dependent on system-level interface voltage and assembly constraints rather than functional capability.

Availability

74HC4020BQ,115 is available at Aetrix Electronics and suitable for frequency dividing circuits, time delay circuits, control counters, and industrial sequencing logic requiring stable component supply across extended temperature ranges.

Supply support for 74HC4020BQ,115 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC4020 belongs to Nexperia's standard logic portfolio, designed specifically for robust, low-power digital timing and counting functions in harsh industrial environments - emphasizing reliability, wide voltage tolerance, and long-term supply stability.

FAQ

What is the maximum clock frequency supported by 74HC4020BQ,115?

The 74HC4020BQ,115 supports up to 24 MHz at VCC = 6.0 V with CL = 50 pF, as specified in Table 7 of the datasheet. This value decreases to 20 MHz at VCC = 4.5 V and further to 14 MHz at VCC = 2.0 V due to increased propagation delay. Operation beyond these limits risks metastability or skipped counts.

Can the thermal pad on the DHVQFN16 package be left unconnected?

Yes - the exposed thermal pad (terminal 1 index area) has no electrical requirement and may remain floating. If soldered, it must either stay electrically isolated or connect directly to VCC; grounding the pad violates the manufacturer's recommendation and may affect thermal performance or ESD robustness.

How does the asynchronous MR input behave during active counting?

The MR input forces all outputs (Q0–Q13) LOW immediately and independently of CP state or edge timing. Its assertion resets internal flip-flop states without waiting for the next clock edge, ensuring deterministic zero-initialization even mid-count - critical for safety-critical timing recovery.

Is 74HC4020BQ,115 pin-compatible with 74HC4040?

No - the 74HC4020BQ,115 has 14 counter stages and 12 outputs (Q0, Q3–Q13), while the 74HC4040 is a 12-stage device with outputs Q0–Q11. Pin assignments differ significantly: CP and MR occupy pins 10 and 11 in both, but output pin locations (e.g., Q0 = pin 14 in 4020 vs. pin 3 in 4040) and missing Q1/Q2 terminals make direct replacement impossible without PCB redesign.

74HC4020BQ,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HC

Package/Case:: 16-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Binary Counter

Direction:: Up

Number of Elements:: 1

Number of Bits per Element:: 14

Reset:: Asynchronous

Timing:: -

Count Rate:: 109 MHz

Trigger Type:: Negative Edge

Voltage - Supply:: 2 V ~ 6 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-DHVQFN (2.5x3.5)

74HC4020BQ,115 FAQ

1.How can I place an order for 74HC4020BQ,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HC4020BQ,115 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 74HC4020BQ,115 reliable?

The price and inventory of 74HC4020BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC4020BQ,115 is usually 5 days.

3.What payment methods are accepted for 74HC4020BQ,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC4020BQ,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HC4020BQ,115?

74HC4020BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HC4020BQ,115 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 74HC4020BQ,115?

For technical support, including 74HC4020BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC4020BQ,115 requirements.

6.How does Aetrix verify that 74HC4020BQ,115 is sourced from the original manufacturer or authorized distributors?

All 74HC4020BQ,115 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 74HC4020BQ,115 meets industry standards.

7.What is the process for return or replacement of 74HC4020BQ,115?

All 74HC4020BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC4020BQ,115, 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 74HC4020BQ,115 part is unused and in its original packaging.

Return procedure for 74HC4020BQ,115:

1.Submit a request within 90 days.

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

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