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Nexperia USA Inc. 74HC393BQ,115
- Part No.:
- 74HC393BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 14-VFQFN Exposed Pad
- Datasheet:
-
74HC393BQ,115.pdf
- Description:
- IC BIN COUNTER DL 4BIT 14DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,792
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Product details
Overview
74HC393BQ,115 from Nexperia is a dual 4-bit binary ripple counter IC with two independent asynchronous master reset inputs (1MR, 2MR), two edge-triggered clock inputs (1CP, 2CP), and eight buffered outputs (1Q0–1Q3, 2Q0–2Q3). It operates from 2.0 V to 6.0 V, advances on HIGH-to-LOW clock transitions, and clears all flip-flops to LOW when MR is HIGH. Used in digital timing, frequency division, and address sequencing circuits requiring low-power CMOS logic.
For engineers reviewing the 74HC393BQ,115 datasheet, 74HC393BQ,115 pinout, 74HC393BQ,115 application, or 74HC393BQ,115 equivalent, this device serves as a space-efficient dual divider for clock tree partitioning, programmable logic state machines, and industrial control counters where rail-to-rail input compatibility and thermal-enhanced QFN packaging are critical.
Technical Context
The 74HC393BQ implements two independent 4-stage ripple counters using T-type flip-flops cascaded in series per channel. Each counter advances synchronously with its dedicated clock input and resets asynchronously via its own active-HIGH master reset - enabling precise, isolated control of divide-by-2n (n = 1 to 4) sequences up to 28 = 256 per package. No internal synchronization between channels exists.
Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The DHVQFN14 package (SOT762-1) provides enhanced thermal performance over SO14 and TSSOP14 variants, with a 2.5 × 3.0 × 0.85 mm body and exposed thermal pad (non-soldered by default).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered operation down to 2 V. |
| Max clock frequency | 107 MHz at VCC = 6.0 V, CL = 50 pF - enables high-speed division in signal conditioning paths. |
| Propagation delay (nCP → nQ0) | 12 ns typical at VCC = 6.0 V - defines minimum clock period for reliable counting at full speed. |
| Output drive strength | ±4.0 mA at VCC = 4.5 V - sufficient to drive 10 LSTTL loads or multiple CMOS inputs without buffering. |
| Power dissipation capacitance | 23 pF - used to calculate dynamic power: PD = CPD × VCC² × fin × N + Σ(CL × VCC² × fout). |
| Input leakage current | ±0.1 μA max at VCC = 6.0 V - ensures minimal standby current in always-on timing circuits. |
| Operating temperature | −40 °C to +125 °C - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
DHVQFN14 package (SOT762-1): 2.5 × 3.0 × 0.85 mm body, 14-terminal quad flat no-lead with exposed thermal pad (terminal 1 index area marked). Pin 1 is top-left corner when index area is oriented top-left; pad is electrically connected to VCC but not required to be soldered.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1CP | Channel 1 clock input - edge-triggered on HIGH-to-LOW transition; drives first flip-flop of counter 1. |
| 2 | 1MR | Channel 1 master reset - asynchronous, active-HIGH; forces 1Q0–1Q3 LOW regardless of clock state. |
| 3–6 | 1Q0, 1Q1, 1Q2, 1Q3 | Counter 1 outputs - buffered, complementary binary count states (LSB to MSB); each capable of driving ≥10 LSTTL loads. |
| 7 | GND | Ground reference - must be low-impedance connection; return path for all internal logic and output currents. |
| 8–11 | 2Q3, 2Q2, 2Q1, 2Q0 | Counter 2 outputs - LSB-first order (2Q3 is MSB, 2Q0 is LSB); identical electrical specs to 1Qx outputs. |
| 12 | 2MR | Channel 2 master reset - independent of 1MR; enables separate reset control for dual-channel timing functions. |
| 13 | 2CP | Channel 2 clock input - functionally identical to 1CP; allows independent clock domains per counter. |
| 14 | VCC | Supply voltage - powers both counters; thermal pad (under package) may be connected to VCC or left floating per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit counters | Enables two simultaneous divide-by-2n operations (n = 1–4) in one IC - reduces board space vs. discrete 74HC393D or cascaded single counters. |
| Asynchronous master reset per channel | Allows deterministic zero-initialization of each counter without affecting the other - essential for multi-phase timing generators. |
| CMOS-level input compatibility | VIH = 3.15 V min at VCC = 4.5 V - ensures robust noise margin and interoperability with 3.3 V and 5 V logic families. |
| Clamp diode protected inputs | Permits safe interface to signals up to VCC + 0.5 V using external current-limiting resistors - simplifies level-shifting in mixed-supply systems. |
| ESD robustness | HBM > 2000 V, CDM > 1000 V - meets industrial handling requirements without additional protection circuitry. |
Applications
| Industrial PLC Timing Module | Digital Audio Sample Rate Divider |
|---|---|
|
Use Scenario: Generating precise 10 ms and 100 ms timing pulses for cyclic control tasks in programmable logic controllers. IC Role / Device Role / Timing Role: Dual counter provides independent 10 ms (divide-by-1000 at 100 kHz) and 100 ms (divide-by-10,000) outputs using cascaded stages and external gating logic. Use Value: Eliminates need for microcontroller-based timing, reducing BOM cost and firmware complexity while maintaining deterministic jitter-free intervals. |
Use Scenario: Converting 48 kHz I²S master clock to 12 kHz and 6 kHz sampling rates for legacy audio DACs and ADCs. IC Role / Device Role / Timing Role: First counter divides 48 kHz by 4 (12 kHz), second counter divides same source by 8 (6 kHz); both use same clock domain for phase coherence. Use Value: Maintains exact integer division ratios with zero accumulated phase error across sample periods - critical for jitter-sensitive audio reconstruction. |
| Embedded Motor Encoder Pre-scaler | Test Equipment Frequency Counter Front-end |
|
Use Scenario: Reducing high-frequency quadrature encoder signals (up to 1 MHz) to manageable rates for MCU GPIO capture. IC Role / Device Role / Timing Role: One counter pre-scales A/B channel edges by 16 (2⁴), the other handles index pulse division independently for position homing. Use Value: Offloads high-speed counting from MCU, freeing CPU cycles and avoiding missed edges during interrupt latency spikes. |
Use Scenario: Extending measurement range of a 100 MHz counter IC by pre-dividing unknown input frequencies above 100 MHz. IC Role / Device Role / Timing Role: Dual counters configured as cascaded divide-by-16 stages (2⁸ = 256) to extend upper limit to 25.6 GHz before main counter stage. Use Value: Enables direct frequency measurement of RF synthesizer outputs without external prescalers or PLL-based downconversion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual binary counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC393D,118 | SO14 package (SOT108-1); 3.9 mm body width; higher thermal resistance (10.1 mW/K derating above 100 °C). | Preferred for through-hole prototyping or legacy PCBs with SOIC footprints; less suitable for high-density or thermally constrained layouts. | Select when board space permits larger footprint and thermal management is handled externally. |
| 74HC393PW,118 | TSSOP14 package (SOT402-1); 4.4 mm body width; 7.3 mW/K derating above 81 °C; slightly lower max fCLK (99 MHz at VCC = 5 V, CL = 15 pF). | Better suited for hand-soldered small-batch builds due to wider pitch (0.65 mm) vs. DHVQFN's 0.5 mm; moderate thermal performance. | Choose for manual assembly or when thermal load is moderate and board real estate is tighter than SO14 but looser than QFN. |
Compared with 74HC393D and 74HC393PW, the 74HC393BQ offers superior thermal efficiency and smallest footprint - making it optimal for high-reliability, space-constrained industrial modules where sustained 100+ MHz operation is required without forced airflow.
Availability
74HC393BQ,115 is available at Aetrix Electronics and suitable for industrial PLC timing modules, digital audio sample rate dividers, embedded motor encoder pre-scalers, and test equipment frequency counter front-ends requiring stable component supply across extended temperature ranges.
Supply support for 74HC393BQ,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 delivering high-performance, reliable logic, analog, and MOSFET solutions with focus on efficiency, miniaturization, and robustness for industrial and automotive markets.
The 74HC393BQ belongs to Nexperia's HC-series logic family, designed specifically for low-power, high-noise-immunity digital signal routing and timing functions in harsh environments - emphasizing rail-to-rail compatibility, wide VCC tolerance, and extended temperature operation.
FAQ
What is the maximum clock frequency supported by the 74HC393BQ,115?
The 74HC393BQ,115 supports a maximum clock frequency of 107 MHz at VCC = 6.0 V and CL = 50 pF, as specified in Table 7 of the datasheet. At 4.5 V and same load, the limit drops to 48 MHz. Performance degrades linearly with reduced supply voltage or increased capacitive loading beyond 50 pF.
Can the 74HC393BQ,115 operate with a 3.3 V supply?
Yes - the 74HC393BQ,115 is fully specified for operation from 2.0 V to 6.0 V. At 3.3 V, VIH is guaranteed ≥2.1 V and VOL ≤0.26 V at 4.0 mA sink current, ensuring reliable interfacing with 3.3 V microcontrollers and FPGAs without level shifters.
Is the thermal pad on the DHVQFN14 package required to be soldered?
No - the exposed thermal pad (terminal 1 index area) has no electrical or mechanical requirement to be soldered. If soldered, it must remain floating or be connected to VCC per Nexperia's layout guidance in Figure 8; improper grounding causes functional failure due to internal bias disruption.
How does the ripple architecture affect timing accuracy between outputs?
Ripple propagation introduces cumulative delay: tpd(1CP→1Q0) = 12 ns, but tpd(1CP→1Q3) ≈ 4×12 ns = 48 ns at VCC = 6.0 V. This skew limits synchronous use of all four outputs as a parallel bus; however, it is irrelevant for pure frequency division where only the MSB (1Q3) is used as the divided clock.
74HC393BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 14-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Binary Counter
- Direction:
- Up
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Reset:
- Asynchronous
- Timing:
- -
- Count Rate:
- 107 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:
- 14-DHVQFN (2.5x3)
74HC393BQ,115 FAQ
1.How can I place an order for 74HC393BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC393BQ,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 74HC393BQ,115 reliable?
The price and inventory of 74HC393BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC393BQ,115 is usually 5 days.
3.What payment methods are accepted for 74HC393BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC393BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC393BQ,115?
74HC393BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC393BQ,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 74HC393BQ,115?
For technical support, including 74HC393BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC393BQ,115 requirements.
6.How does Aetrix verify that 74HC393BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74HC393BQ,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 74HC393BQ,115 meets industry standards.
7.What is the process for return or replacement of 74HC393BQ,115?
All 74HC393BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC393BQ,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 74HC393BQ,115 part is unused and in its original packaging.
Return procedure for 74HC393BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC393BQ,115 Tags
-
74HC393BQ,115
Nexperia USA Inc.
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Texas Instruments
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