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

Nexperia USA Inc. 74HCT4020BQ-Q100X

Name: 74HCT4020BQ-Q100X
Brand: Nexperia USA Inc.
SKU: 74HCT4020BQ-Q100X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT4020BQ-Q100X

Manufacturer:: Nexperia USA Inc.

Category:: Counters, Dividers

Package:: 16-VFQFN Exposed Pad

Datasheet:: 74HCT4020BQ-Q100X.pdf

Description:: IC BINARY COUNTER 14BIT 16DHVQFN

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Product details

Overview

74HCT4020BQ-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 14-stage binary ripple counter with TTL-compatible inputs, asynchronous master reset (MR), and 12 buffered outputs (Q0, Q3–Q13). It advances on the HIGH-to-LOW clock edge, operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient, and delivers f_MAX = 25 MHz at V_CC = 4.5 V in automotive timing and frequency-division circuits.

For engineers reviewing the 74HCT4020BQ-Q100 datasheet, 74HCT4020BQ-Q100 pinout, 74HCT4020BQ-Q100 application, or 74HCT4020BQ-Q100 equivalent, this page provides verified functional identity, DHVQFN16 package mapping, validated terminal roles, automotive-grade thermal and ESD specs, and direct substitution guidance for ripple counter design in engine control units and body electronics.

Technical Context

This device implements a cascaded chain of 14 static toggle flip-flops, where each stage divides its input by two - yielding Q13 as the 2¹³ = 8192 division output. The asynchronous MR input forces all outputs LOW independent of CP state, enabling deterministic reset without clock synchronization.

Input levels conform to TTL thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at V_CC = 4.5–5.5 V), ensuring compatibility with legacy microcontroller GPIOs and 5 V logic families. Propagation delay from CP to Q0 is 18 ns (typ) at V_CC = 4.5 V, with inter-stage delay (Qn → Qn+1) at 8 ns (typ), defining its real-time ripple behavior in time-delay and clock-gating applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Function	14-stage asynchronous binary ripple counter with single-clock edge-triggered advance and overriding active-HIGH reset
Supply Voltage	4.5 V to 5.5 V - ensures robust operation across automotive battery transients and regulator tolerances
Operating Temperature	-40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and powertrain environments
Max Clock Frequency	25 MHz at V_CC = 4.5 V - sets upper limit for reliable division in engine speed sensing and PWM prescaling
Propagation Delay (CP→Q0)	18 ns (typ) at V_CC = 4.5 V - determines minimum pulse width and timing margin in synchronous subsystems
Output Drive	±4.0 mA at V_CC = 4.5 V - sufficient to drive multiple CMOS/TTL inputs or small capacitive loads without buffering
ESD Rating	HBM > 2000 V, CDM > 1000 V - meets automotive board-level ESD immunity requirements per ISO 10605

Pinout & Package

DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, no leads, side-wettable flanks for AOI-compatible solder joint inspection, exposed thermal pad (non-electrical, floating or tied to V_CC).

Pin/Terminal	Circuit Role	Design Meaning
1	Q11	2¹¹ = 2048÷ clock output - used for mid-range timing intervals in wiper control or HVAC sequencing
2	Q12	2¹² = 4096÷ clock output - feeds downstream counters or interrupt rate generators in cluster instrumentation
3	Q13	2¹³ = 8192÷ clock output - primary low-frequency reference for watchdog timeout or sleep-mode wake-up
4	Q5	2⁵ = 32÷ clock output - suitable for baud-rate derivation or LED blink timing in status indicators
5	Q4	2⁴ = 16÷ clock output - commonly used for multiplexed display scanning or sensor sampling gating
6	Q6	2⁶ = 64÷ clock output - enables precise 1 ms or 10 ms timebase generation when driven by 64 kHz crystal
7	Q3	2³ = 8÷ clock output - interfaces directly to microcontroller external interrupt pins for event counting
8	GND	Reference ground plane - must be low-inductance connection to minimize switching noise coupling into analog sections
9	Q7	2⁷ = 128÷ clock output - synchronizes CAN message arbitration timing or LIN bus bit sampling windows
10	CP	Clock input, HIGH-to-LOW edge-triggered - requires clean, monotonic transitions; input clamp diodes allow overvoltage protection with series resistors
11	MR	Master reset, active HIGH - asynchronously clears all stages; critical for fail-safe initialization in safety-critical boot sequences
12	Q8	2⁸ = 256÷ clock output - drives secondary timing chains in ADAS camera frame sync or radar chirp control
13	Q9	2⁹ = 512÷ clock output - used in PWM duty-cycle modulation for fan speed control or solenoid actuation
14	Q10	2¹⁰ = 1024÷ clock output - supplies timing reference to EEPROM write-cycle timers or flash programming sequencers
15	Q0	2⁰ = 2÷ clock output - lowest division stage; often monitored for clock integrity or jitter detection
16	V_CC	Positive supply - not a signal pin; decoupling capacitor (100 nF X7R) required within 3 mm of this terminal

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for continuous operation at +125 °C ambient, supporting engine control module deployment without derating
TTL-compatible input thresholds	VIH ≥ 2.0 V, VIL ≤ 0.8 V at 4.5–5.5 V - eliminates level-shifter requirement when interfacing with legacy 5 V MCUs
Side-wettable flanks (SWF)	Enables automated optical inspection of solder joints on bottom-terminated DHVQFN - reduces post-reflow defect escape in high-volume automotive PCB assembly
Clamp diode-equipped inputs	Allows use of current-limiting resistors for interfacing to signals exceeding V_CC, simplifying overvoltage protection in mixed-voltage domains
Low dynamic power dissipation	CPD = 20 pF - limits switching current draw in battery-powered modules; PD ≈ 0.5 mW at 1 MHz with 5 V supply

Applications

Engine Speed Sensing

Instrument Cluster Timing

Use Scenario: Deriving crankshaft position pulses from a 64 kHz oscillator for RPM calculation in ECU firmware.

IC Role / Device Role / Timing Role: 14-stage divider generates stable 7.8125 Hz Q13 output synchronized to engine rotation, feeding microcontroller capture timer.

Use Value: Eliminates need for external PLL or programmable timer; deterministic 8192:1 division ensures repeatable timing resolution across temperature and voltage.

Use Scenario: Generating 1 Hz and 100 Hz timing references for odometer accumulation and tachometer needle sweep in digital dashboards.

IC Role / Device Role / Timing Role: Q13 (8192÷) and Q7 (128÷) outputs provide independent low-jitter clocks routed to separate MCU peripherals.

Use Value: Reduces MCU interrupt load and firmware complexity; hardware-based division improves timing accuracy versus software counters.

ADAS Camera Frame Sync

Body Control Module (BCM) Wake-Up

Use Scenario: Synchronizing image sensor exposure windows with vehicle motion data in forward-facing camera systems.

IC Role / Device Role / Timing Role: Q9 (512÷) output triggers exposure start; Q12 (4096÷) gates shutter duration, both derived from 25 MHz master clock.

Use Value: Hardware-level synchronization avoids CPU latency-induced frame skew; ripple architecture ensures monotonic phase relationship between outputs.

Use Scenario: Providing ultra-low-power wake-up signal to BCM microcontroller after 2 s of ignition-off inactivity.

IC Role / Device Role / Timing Role: Q13 output toggles every ~327 ms at 1 MHz input; NAND-combined with sleep controller to generate precise 2 s timeout pulse.

Use Value: Enables sub-1 μA quiescent current during sleep - no active MCU involvement required until final timeout assertion.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
74HC4020BQ-Q100	CMOS input thresholds (VIH ≥ 3.15 V @ V_CC = 4.5 V); wider 2.0–6.0 V supply range	Better suited for mixed-supply systems with 3.3 V logic domains; higher noise margin in noisy engine bays	Select when interfacing with 3.3 V MCUs or requiring extended V_CC flexibility beyond 5 V nominal
SN74LV4020APWR	LV-CMOS family; VIH = 2.0 V min, VIL = 0.8 V max at V_CC = 4.5 V; rated -40 °C to +105 °C only	Lacks AEC-Q100 qualification; unsuitable for powertrain or safety-critical zones	Acceptable for non-automotive industrial controls or infotainment subsystems where Grade 1 is not mandated

Compared with 74HC4020BQ-Q100 and SN74LV4020APWR, the 74HCT4020BQ-Q100 uniquely balances TTL input compatibility, full AEC-Q100 Grade 1 qualification, and DHVQFN thermal performance - making it the only choice for production automotive timing where both legacy interface and under-hood reliability are mandatory.

Availability

74HCT4020BQ-Q100 is available at Aetrix Electronics and suitable for engine control units, instrument clusters, ADAS camera modules, and body control modules requiring stable component supply across automotive production lifecycles.

Supply support for 74HCT4020BQ-Q100 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 leading semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74HCT4020-Q100 series belongs to Nexperia's automotive-qualified logic portfolio, designed specifically to replace legacy 74-series counters in safety-critical and thermally demanding vehicle subsystems while maintaining pin-and-function compatibility.

FAQ

What is the maximum clock frequency supported by the 74HCT4020BQ-Q100?

The 74HCT4020BQ-Q100 supports a maximum clock frequency of 25 MHz at V_CC = 4.5 V and T_A = 25 °C. At full temperature range (-40 °C to +125 °C), f_MAX is guaranteed at 17 MHz per datasheet Table 7. This limit arises from cumulative propagation delay across 14 ripple stages and ensures reliable counting without metastability.

Can the MR (master reset) pin be left unconnected?

No - MR is an active-HIGH input with no internal pull-down. Leaving it floating risks unintended resets due to noise coupling. It must be actively driven LOW (via MCU GPIO or pull-down resistor) during normal operation and pulsed HIGH only when a synchronous or asynchronous clear is required. A 10 kΩ pull-down to GND is recommended for default-safe operation.

Does the DHVQFN16 package require soldering of the exposed thermal pad?

No - the exposed pad in SOT763-1 is electrically isolated and has no internal connection. Per datasheet Section 6.1, it may remain floating or be connected to V_CC if desired for mechanical reinforcement, but must never be tied to GND or any other potential. No thermal vias or solder paste beneath the pad are required for electrical functionality.

How does the 74HCT4020BQ-Q100 differ from the 74HC4020BQ-Q100 in system integration?

The key difference is input threshold compatibility: 74HCT4020BQ-Q100 accepts standard TTL logic levels (VIH ≥ 2.0 V), enabling direct interface with 5 V microcontrollers and legacy peripherals without level shifters. In contrast, 74HC4020BQ-Q100 requires CMOS-level inputs (VIH ≥ 3.15 V at 4.5 V), limiting interoperability in mixed-signal automotive designs where 5 V TTL signaling persists.

74HCT4020BQ-Q100X Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HCT

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:: 47 MHz

Trigger Type:: Negative Edge

Voltage - Supply:: 4.5 V ~ 5.5 V

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

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

74HCT4020BQ-Q100X FAQ

1.How can I place an order for 74HCT4020BQ-Q100X through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT4020BQ-Q100X 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 74HCT4020BQ-Q100X reliable?

The price and inventory of 74HCT4020BQ-Q100X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT4020BQ-Q100X is usually 5 days.

3.What payment methods are accepted for 74HCT4020BQ-Q100X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT4020BQ-Q100X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT4020BQ-Q100X?

74HCT4020BQ-Q100X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT4020BQ-Q100X 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 74HCT4020BQ-Q100X?

For technical support, including 74HCT4020BQ-Q100X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT4020BQ-Q100X requirements.

6.How does Aetrix verify that 74HCT4020BQ-Q100X is sourced from the original manufacturer or authorized distributors?

All 74HCT4020BQ-Q100X 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 74HCT4020BQ-Q100X meets industry standards.

7.What is the process for return or replacement of 74HCT4020BQ-Q100X?

All 74HCT4020BQ-Q100X units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT4020BQ-Q100X, 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 74HCT4020BQ-Q100X part is unused and in its original packaging.

Return procedure for 74HCT4020BQ-Q100X:

1.Submit a request within 90 days.

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

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