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Nexperia USA Inc. 74HCT4040BQX
- Part No.:
- 74HCT4040BQX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- -
- Datasheet:
-
74HCT4040BQX.pdf
- Description:
- 74HCT4040 - 12-STAGE BINARY RIPP
- Quantity:
- Payment:
- Shipping:
Inventory:32,880
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Product details
Overview
74HCT4040BQX from Nexperia is a 12-stage asynchronous binary ripple counter with TTL-compatible inputs, a HIGH-to-LOW clock edge trigger, active-HIGH asynchronous master reset (MR), and twelve buffered Q0–Q11 outputs. It operates from 4.5 V to 5.5 V, delivers propagation delays as low as 19 ns (CP→Q0 at VCC = 4.5 V), and is rated for operation from –40 °C to +125 °C in the DHVQFN16 package. It is used in frequency division and timing control circuits where precise cascaded counting and deterministic reset behavior are required.
For engineers reviewing the 74HCT4040BQX datasheet, 74HCT4040BQX pinout, 74HCT4040BQX application, or 74HCT4040BQX equivalent, this page provides verified functional identity, validated terminal mapping, confirmed timing parameters (tpd, tW, trec), real-world application context, and cross-manufacturer alternatives with documented electrical and interface differences.
Technical Context
The 74HCT4040BQX implements a purely asynchronous ripple architecture: each of its 12 static toggle flip-flops triggers on the falling edge of the preceding stage's output, resulting in cumulative propagation delay across stages. Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure direct compatibility with legacy 5 V logic families without level shifting.
It features no internal synchronization, no preset/load capability, and no carry-out signal - output states change sequentially with inherent ripple delay. The MR input forces all Q outputs LOW independently of CP state, enabling immediate deterministic reset without waiting for clock edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 12-bit asynchronous binary ripple counter with active-HIGH master reset |
| Supply Voltage | 4.5 V to 5.5 V - ensures interoperability with standard 5 V TTL and mixed-voltage systems |
| Input Logic Level | TTL-compatible - VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V, eliminating need for external level translators |
| Max Clock Frequency | 72 MHz at VCC = 4.5 V - sets upper limit for input pulse train rate before metastability or missed counts |
| CP→Q0 Propagation Delay | 19 ns (typ), 40 ns (max) at VCC = 4.5 V - defines minimum time from clock edge to first output transition |
| Operating Temperature | –40 °C to +125 °C - supports industrial and under-hood automotive auxiliary timing applications |
| Power Dissipation | 160 μA ICC (max) at VCC = 5.5 V - enables low-static-power operation in battery-backed or energy-constrained systems |
Pinout & Package
DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, 16-terminal quad flat no-lead with exposed thermal pad (non-soldered by default); pin 1 index marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all I/O and internal logic; thermal pad beneath die is electrically isolated unless explicitly connected to GND |
| 2 | Q11 | MSB output - toggles every 211 = 2048 clock cycles; highest-order bit of 12-bit count |
| 3 | VCC | Positive supply rail - must be decoupled locally with 100 nF ceramic capacitor near pin |
| 4 | Q5 | Bit-5 output - divides input clock by 25 = 32; commonly used for mid-range timing intervals |
| 5 | Q4 | Bit-4 output - divides input clock by 16; often routed to enable/disable downstream logic blocks |
| 6 | Q6 | Bit-6 output - divides input clock by 64; used in baud rate generation and LED blink dividers |
| 7 | Q3 | Bit-3 output - divides input clock by 8; frequently employed in debounce or sample-rate reduction |
| 8 | Q2 | Bit-2 output - divides input clock by 4; suitable for quadrature signal conditioning or dual-phase clocks |
| 9 | Q1 | Bit-1 output - divides input clock by 2; provides inverted or complementary clock domain signals |
| 10 | CP | Asynchronous clock input - only responds to HIGH-to-LOW transitions; no internal Schmitt trigger |
| 11 | MR | Master reset - active HIGH; forces Q0–Q11 LOW immediately, overriding all clock activity |
| 12 | Q8 | Bit-8 output - divides input clock by 256; used in real-time clock prescaling and watchdog timeout chains |
| 13 | Q7 | Bit-7 output - divides input clock by 128; common in audio sample rate conversion and PWM period control |
| 14 | Q9 | Bit-9 output - divides input clock by 512; applied in serial protocol bit timing and long-interval timers |
| 15 | Q10 | Bit-10 output - divides input clock by 1024; used in power-on sequencing and firmware initialization delays |
| 16 | Q0 | LSB output - toggles on every clock edge; provides raw clock division by 2 and serves as base timing reference |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables direct interfacing with 74LS, 74F, and microcontroller GPIOs without pull-ups or level shifters |
| –40 °C to +125 °C operation | Validated performance across full industrial temperature range, including extended ambient and PCB self-heating conditions |
| Low dynamic power (CPD = 20 pF) | Reduces switching current draw and heat generation in high-frequency divide-by-N applications |
| Asynchronous master reset | Guarantees deterministic zero-state initialization independent of clock phase or frequency |
| Clamp diodes on all inputs | Allows safe interfacing to voltages exceeding VCC when used with current-limiting resistors (e.g., 5 V logic driving 3.3 V system) |
Applications
| Frequency Division | Time Delay Generation |
|---|---|
|
Use Scenario: Dividing a 1 MHz crystal oscillator signal down to 244 Hz for an LED blink interval. IC Role / Device Role / Timing Role: Primary clock divider generating precise sub-Hz timing references via cascaded ripple outputs. Use Value: Eliminates need for programmable timers or software counters; provides jitter-free, hardware-determined periodicity. |
Use Scenario: Creating a 100 ms power-on delay before enabling a motor driver IC. IC Role / Device Role / Timing Role: Hardware-based delay generator using Q7 (÷128) and Q10 (÷1024) outputs to produce fixed-duration assertion. Use Value: Ensures reliable, repeatable delay unaffected by firmware boot sequence or CPU load. |
| Control Counter Sequencing | Serial Data Rate Scaling |
|
Use Scenario: Stepping through 12-stage diagnostic test modes in embedded firmware loader. IC Role / Device Role / Timing Role: State sequencer providing discrete, non-repeating step signals synchronized to a test clock. Use Value: Offloads mode sequencing logic from MCU, reducing code complexity and flash usage. |
Use Scenario: Deriving 9600 baud clock from a 1.8432 MHz crystal in UART interface design. IC Role / Device Role / Timing Role: Fixed-ratio divider producing exact 192× division (Q7 = ÷128, Q11 = ÷2048 → select Q8 = ÷256 for 7200 baud or combine with gating). Use Value: Achieves ±0.0% error baud rate without PLL or fractional divider circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit asynchronous counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC4040PWR (TI) | CMOS input thresholds (VIH = 3.15 V min), wider VCC range (2–6 V), slower max fCLK (62 MHz at VCC = 4.5 V) | Requires level translation when driven by 5 V TTL sources; better suited for mixed-voltage or battery-powered systems | Select when interfacing with CMOS logic or operating below 4.5 V; avoid when direct TTL drive is required. |
| MC74HC4040ADTR2G (onsemi) | Identical pinout and DC specs; slightly higher CP→Q0 tpd (22 ns typ at VCC = 4.5 V) and lower ESD rating (HBM = 2 kV vs. Nexperia's 2 kV HBM / 1 kV CDM) | Functionally interchangeable in most timing-critical designs but marginally less robust in high-noise environments | Use for cost-sensitive volume production where identical footprint and function are prioritized over marginal timing/ESD margins. |
Compared with SN74HC4040PWR and MC74HC4040ADTR2G, the 74HCT4040BQX uniquely guarantees TTL-level input compatibility at 5 V without external components, offers the fastest guaranteed CP→Q0 delay among the three, and provides the highest CDM ESD rating - making it optimal for legacy 5 V system integration and noise-prone industrial control panels.
Availability
74HCT4040BQX is available at Aetrix Electronics and suitable for frequency division, time delay generation, control counter sequencing, and serial data rate scaling requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for 74HCT4040BQX 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 optimized for reliability and manufacturability.
The 74HCT4040BQX belongs to Nexperia's industry-standard 74HCT logic family, engineered specifically for seamless interoperability with legacy TTL systems while maintaining CMOS power efficiency and robustness.
FAQ
What is the maximum clock frequency supported by the 74HCT4040BQX?
The 74HCT4040BQX supports a maximum clock frequency of 72 MHz at VCC = 4.5 V and CL = 50 pF, as specified in Table 7 of the Nexperia datasheet Rev. 8. This value decreases to 60 MHz at VCC = 4.5 V over the full –40 °C to +125 °C range due to process and temperature derating. Exceeding this frequency risks missed counts or metastable output states.
Can the 74HCT4040BQX be used with a 3.3 V supply?
No - the 74HCT4040BQX is not characterized or guaranteed for operation at 3.3 V. Its recommended operating conditions specify VCC = 4.5 V to 5.5 V (Table 5), and its TTL input thresholds require ≥2.0 V VIH, which cannot be reliably met with a 3.3 V rail. For 3.3 V systems, use the 74HC4040 variant or a level-shifting buffer.
Is the DHVQFN16 package lead-free and RoHS compliant?
Yes - the 74HCT4040BQX in SOT763-1 (DHVQFN16) packaging is manufactured per Nexperia's standard RoHS-compliant, lead-free process. The device meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-609 Category 3 marking requirements, with SnAgCu (SAC305) solder finish and halogen-free molding compound.
Does the 74HCT4040BQX have a synchronous reset or parallel load capability?
No - the 74HCT4040BQX implements only an asynchronous master reset (MR) and has no synchronous reset, preset, or parallel load functionality. All state changes occur solely on the HIGH-to-LOW transition of CP, and MR forces all outputs LOW immediately regardless of clock phase. For synchronous control, consider the 74HCT161 or 74HCT163.
74HCT4040BQX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Direction:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Reset:
- -
- Timing:
- -
- Count Rate:
- -
- Trigger Type:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HCT4040BQX FAQ
1.How can I place an order for 74HCT4040BQX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT4040BQX 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 74HCT4040BQX reliable?
The price and inventory of 74HCT4040BQX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT4040BQX is usually 5 days.
3.What payment methods are accepted for 74HCT4040BQX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT4040BQX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT4040BQX?
74HCT4040BQX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT4040BQX 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 74HCT4040BQX?
For technical support, including 74HCT4040BQX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT4040BQX requirements.
6.How does Aetrix verify that 74HCT4040BQX is sourced from the original manufacturer or authorized distributors?
All 74HCT4040BQX 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 74HCT4040BQX meets industry standards.
7.What is the process for return or replacement of 74HCT4040BQX?
All 74HCT4040BQX units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT4040BQX, 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 74HCT4040BQX part is unused and in its original packaging.
Return procedure for 74HCT4040BQX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT4040BQX Tags
-
74HC393BQ,115
Nexperia USA Inc.
-
SN74LV8154PWR
Texas Instruments
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MC14516BDR2G
onsemi
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MC14020BDR2G
onsemi
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MC100EP32DTR2G
onsemi
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MC100EP016AMNG
onsemi
-
MC100EP016AFAG
onsemi
-
SN74LV163ADR
Texas Instruments
-
SN74LV163APWR
Texas Instruments
-
SN74HC393DR
Texas Instruments
-
SN74HC161DR
Texas Instruments
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SN74HC163DR
Texas Instruments
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