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Nexperia USA Inc. 74HC40103D,653
- Part No.:
- 74HC40103D,653
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HC40103D,653.pdf
- Description:
- IC BINARY COUNTER 8-BIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,933
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Product details
Overview
74HC40103D,653 from Nexperia is an 8-bit synchronous binary down counter with asynchronous master reset (MR), synchronous/asynchronous preset (PE/PL), terminal enable (TE), and active-low terminal count (TC) output. It operates from 2.0 V to 6.0 V, delivers ≤60 ns propagation delay at 4.5 V, and supports cascading in synchronous or ripple mode for extended counting sequences. Used in programmable timers and divide-by-N clock generation circuits requiring precise zero-count detection.
For engineers reviewing the 74HC40103D,653 datasheet, 74HC40103D,653 pinout, 74HC40103D,653 application, or 74HC40103D,653 equivalent, key selection criteria include its dual-mode preset capability (synchronous via PE, asynchronous via PL), guaranteed operation up to +125 °C, TC pulse width matching one full CP period at zero count, and SO16 package compatibility with legacy 74HC logic footprints.
Technical Context
The device implements eight edge-triggered D-type flip-flops with shared clock (CP) and control logic enabling synchronous decrement on each LOW-to-HIGH CP transition. Its functional architecture supports both cascaded counting (via TE input and TC output) and independent jam-loading of P0–P7 inputs under MR, PL, or PE assertion.
Control prioritization follows strict hierarchy: MR (asynchronous clear to 255) overrides all; PL (asynchronous load) overrides PE and TE; PE enables synchronous load only when TE is inactive. TC asserts LOW for exactly one CP cycle upon reaching zero - a deterministic timing behavior critical for interrupt generation and timeout signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Counter Type | 8-bit synchronous binary down counter with wraparound from 0 to 255 |
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V systems without level shifting |
| Max Clock Frequency | 35 MHz at VCC = 6.0 V - supports high-speed timing applications with sub-30 ns tPHL |
| Propagation Delay (CP to TC) | 28–51 ns at VCC = 6.0 V - ensures predictable zero-detection latency for real-time control loops |
| Operating Temperature | -40 °C to +125 °C - qualified for automotive under-hood and industrial motor-control environments |
| Terminal Count Pulse Width | Exactly one full CP period - provides unambiguous, glitch-free interrupt trigger without external monostable circuitry |
| Input Clamping Diodes | Integrated - allows safe interfacing to voltages exceeding VCC using current-limiting resistors |
Pinout & Package
74HC40103D,653 is housed in a 16-lead SO16 plastic small outline package (SOT109-1), 3.9 mm body width, with standard 1.27 mm lead pitch and gull-wing leads compatible with automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CP | Clock input | LOW-to-HIGH edge-triggered; synchronizes all internal state changes including count decrement and synchronous preset |
| 2 - MR | Asynchronous master reset | Active LOW; forces counter to maximum value (255) regardless of CP, TE, or PL state |
| 3 - TE | Terminal enable | Active LOW; enables TC output assertion and permits counting only when LOW |
| 4–7, 10–13 - P0–P7 | Jam data inputs | 8-bit parallel load bus; MSB = P7, LSB = P0; sampled on CP edge when PE = LOW or forced when PL = LOW |
| 8 - GND | Ground reference | 0 V return path for all internal logic and I/O; must be low-impedance for noise immunity |
| 9 - PL | Asynchronous preset enable | Active LOW; loads P0–P7 immediately, overriding CP, TE, and PE |
| 14 - TC | Terminal count output | Active LOW open-drain output; pulses LOW for one full CP period when count reaches zero and TE = LOW |
| 15 - PE | Synchronous preset enable | Active LOW; enables loading of P0–P7 on next CP rising edge, provided TE = HIGH |
| 16 - VCC | Positive supply | Primary power rail; decoupling capacitor required within 10 mm of pin for stable high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode preset | Supports both synchronous (PE-controlled) and asynchronous (PL-controlled) 8-bit parallel load - eliminates need for external load strobes or glue logic |
| Cascadable architecture | TE input and TC output allow daisy-chaining multiple 74HC40103 devices for counters beyond 8 bits without external gating |
| Wide voltage operation | Functional across 2.0–6.0 V - enables single-part deployment in mixed-voltage systems (e.g., 3.3 V logic with 5 V peripherals) |
| High noise immunity | CMOS input thresholds (VIH ≥ 70% VCC, VIL ≤ 30% VCC) and integrated clamp diodes suppress EMI-induced false triggering |
| Industrial temperature grade | Specified from -40 °C to +125 °C - validated for continuous operation in harsh thermal environments without derating |
Applications
| Programmable Timer | Divide-by-N Counter |
|---|---|
Use Scenario: Generating precise time-out intervals in microcontroller watchdog circuits or power-on reset sequencers. IC Role / Device Role / Timing Role: Down counter initialized with N+1; TC pulse triggers system reset or interrupt when count reaches zero. Use Value: Eliminates external RC timing components and provides deterministic, temperature-stable timeout periods independent of analog drift. | Use Scenario: Reducing high-frequency clock signals (e.g., 10 MHz system clock) to lower frequencies (e.g., 10 kHz) for peripheral interfaces. IC Role / Device Role / Timing Role: Configured as modulo-(N+1) divider; TC output serves as clean, duty-cycle-controlled divided clock. Use Value: Delivers exact integer division ratios with no jitter accumulation across cycles - superior to PLL-based dividers for deterministic timing. |
| Interrupt Timer | Cycle/Program Counter |
Use Scenario: Managing periodic servicing of real-time tasks in embedded firmware, such as sensor polling or PWM update cycles. IC Role / Device Role / Timing Role: Counts down from preset value; TC pulse generates hardware interrupt request to CPU on each zero-crossing. Use Value: Offloads timing-critical interrupt scheduling from software, reducing CPU overhead and jitter in latency-sensitive applications. | Use Scenario: Tracking instruction execution cycles in FPGA-based soft-core processors or microcoded controllers. IC Role / Device Role / Timing Role: Synchronously decrements per instruction fetch; TC flags end-of-program or loop termination condition. Use Value: Provides hardware-accelerated loop control with zero-software latency - critical for deterministic finite-state machine implementations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit synchronous down counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC40103PW,118 | TSSOP16 package (SOT403-1); 4.4 mm body width; 0.65 mm lead pitch | Better board-space efficiency and thermal performance in high-density layouts; requires finer-pitch reflow profile | Select for space-constrained PCBs where SO16 footprint is unavailable or thermal dissipation exceeds SO16 limits. |
| SN74HC40103N | Obsolete PDIP-16 package; wider 0.3" body; no modern industrial temp rating | Limited to lab prototyping or legacy through-hole designs; not qualified for >85 °C operation | Avoid for new designs; use only for direct replacement in existing DIP-based systems with verified thermal margins. |
Compared with 74HC40103PW,118, the 74HC40103D,653 offers proven manufacturability in SO16 and broader legacy compatibility; versus SN74HC40103N, it delivers full -40 °C to +125 °C qualification and tighter AC timing specs essential for production-grade timing circuits.
Availability
74HC40103D,653 is available at Aetrix Electronics and suitable for programmable timers, divide-by-N counters, interrupt timers, and cycle/program counters requiring stable component supply across automotive, industrial automation, and embedded control programs.
Supply support for 74HC40103D,653 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 logic, discrete, and MOSFET solutions with focus on reliability, efficiency, and scalability for mass-market electronics.
The 74HC40103 belongs to Nexperia's high-speed CMOS logic family, engineered specifically for deterministic timing functions in resource-constrained embedded systems where low power, wide voltage tolerance, and industrial temperature resilience are mandatory.
FAQ
What is the function of the TE (terminal enable) pin?
The TE pin is an active-LOW control that enables the terminal count (TC) output and permits counting. When TE is HIGH, counting is inhibited and TC remains HIGH regardless of counter state. When TE is LOW, TC goes LOW for one full clock period upon reaching zero count - making TE essential for gated timeout or conditional interrupt generation.
Can the 74HC40103D,653 be used as an up counter?
No - the 74HC40103D,653 is strictly an 8-bit synchronous down counter with fixed decrement-on-clock architecture. It lacks up-count logic, carry-out for upward propagation, or configurable count direction. For up/down functionality, consider dedicated 74HC190 or 74HC192 devices instead.
How does the asynchronous preset (PL) interact with the master reset (MR)?
MR has absolute priority: when MR is LOW, the counter is forced to 255 regardless of PL, PE, TE, or CP state. PL only takes effect when MR is HIGH. Both are asynchronous, but MR overrides PL - ensuring fail-safe initialization to maximum count during system reset sequences.
Is the TC output buffered or open-drain?
The TC output is an active-LOW open-drain structure, requiring an external pull-up resistor to VCC or another logic rail. This allows wired-OR connection with other TC outputs in cascaded configurations and supports mixed-voltage interfacing - unlike push-pull outputs, it avoids contention when multiple devices drive the same node.
74HC40103D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Binary Counter
- Direction:
- Down
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Reset:
- Asynchronous
- Timing:
- Synchronous
- Count Rate:
- 32 MHz
- Trigger Type:
- Positive Edge
- Voltage - Supply:
- 2 V ~ 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74HC40103D,653 FAQ
1.How can I place an order for 74HC40103D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC40103D,653 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 74HC40103D,653 reliable?
The price and inventory of 74HC40103D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC40103D,653 is usually 5 days.
3.What payment methods are accepted for 74HC40103D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC40103D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC40103D,653?
74HC40103D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC40103D,653 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 74HC40103D,653?
For technical support, including 74HC40103D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC40103D,653 requirements.
6.How does Aetrix verify that 74HC40103D,653 is sourced from the original manufacturer or authorized distributors?
All 74HC40103D,653 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 74HC40103D,653 meets industry standards.
7.What is the process for return or replacement of 74HC40103D,653?
All 74HC40103D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC40103D,653, 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 74HC40103D,653 part is unused and in its original packaging.
Return procedure for 74HC40103D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC40103D,653 Tags
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