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Nexperia USA Inc. 74HC4520DB,112
- Part No.:
- 74HC4520DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HC4520DB,112.pdf
- Description:
- IC BINARY COUNTR DL 4BIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,726
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Product details
Overview
74HC4520DB,112 from Nexperia is a dual 4-bit synchronous binary counter IC with two independent clock inputs (nCP0 and nCP1), asynchronous master reset (nMR), and buffered outputs (nQ0–nQ3 per counter). It operates from 2.0 V to 6.0 V, supports both LOW-to-HIGH and HIGH-to-LOW edge-triggered counting modes, and functions across -40 °C to +125 °C - used in multistage synchronous counting and frequency division circuits.
For engineers reviewing the 74HC4520DB,112 datasheet, 74HC4520DB,112 pinout, 74HC4520DB,112 application, or 74HC4520DB,112 equivalent, key selection concerns include dual-clock edge sensitivity (nCP0 rising / nCP1 falling), guaranteed operation at 6 V, SO16 package compatibility, and CMOS-level input thresholds for low-power digital timing systems.
Technical Context
This device implements two independent 4-bit synchronous binary counters sharing no internal state - each advances on either nCP0's rising edge (when nCP1 = HIGH) or nCP1's falling edge (when nCP0 = LOW). The asynchronous nMR input forces all eight outputs (1Q0–1Q3, 2Q0–2Q3) LOW regardless of clock states.
Input clamping diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Propagation delay from nCP0/nCP1 to output is 22–41 ns at VCC = 6.0 V (CL = 50 pF), and maximum operating frequency reaches 69 MHz at VCC = 6.0 V and CL = 15 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic families without level shifters. |
| Operating Temperature | -40 °C to +125 °C - qualified for industrial and extended-temperature embedded control applications. |
| Propagation Delay (nCP0 → nQn) | 22 ns (typ) at VCC = 6.0 V, CL = 50 pF - ensures precise timing alignment in cascaded counter stages. |
| Max Clock Frequency | 69 MHz at VCC = 6.0 V, CL = 15 pF - supports high-speed frequency division up to 1:16 per counter. |
| Output Drive Strength | ±25 mA - sufficient to drive multiple standard CMOS inputs or small capacitive loads directly. |
| Power Dissipation Capacitance | 29 pF - used to calculate dynamic power: PD = CPD × VCC² × fi × N, critical for thermal budgeting. |
| Input Thresholds (74HC) | VIH = 4.2 V, VIL = 1.8 V at VCC = 6.0 V - provides robust noise immunity (>1.2 V noise margin). |
Pinout & Package
74HC4520DB,112 is supplied in SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm lead pitch, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9 (1CP0, 2CP0) | Primary clock input | Rising-edge triggered; counter advances only when corresponding nCP1 = HIGH. |
| 2, 10 (1CP1, 2CP1) | Secondary clock input | Falling-edge triggered; counter advances only when corresponding nCP0 = LOW. |
| 3–6, 11–14 (1Q0–1Q3, 2Q0–2Q3) | Buffered binary outputs | Active HIGH, TTL/CMOS-compatible; represent 4-bit count value (0–15) for each counter. |
| 7, 15 (1MR, 2MR) | Asynchronous master reset | Active HIGH; forces all Q outputs LOW immediately, overriding clock edges. |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-impedance. |
| 16 (VCC) | Positive supply | Power rail for entire IC; decoupling capacitor (100 nF) required near pin for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit counters | Enables two separate 16-state sequences in one package - reduces board space vs. discrete counters. |
| Edge-selectable clocking | Supports both rising-edge (nCP0) and falling-edge (nCP1) triggering - simplifies interface to diverse clock sources. |
| Clamp diode-equipped inputs | Allows safe connection to signals up to VCC + 0.5 V using series resistors - eliminates need for external protection. |
| Wide voltage operation (2.0–6.0 V) | Permits direct use in mixed-voltage systems (e.g., 3.3 V MCU controlling 5 V peripheral timing). |
| Latch-up immunity >100 mA | Meets JESD78 Class II Level B - ensures reliability under transient overvoltage or ESD stress. |
Applications
| Programmable Frequency Divider | Digital Timer Control |
|---|---|
Use Scenario: Dividing a 1 MHz system clock to generate precise 62.5 kHz, 31.25 kHz, or lower periodic signals for PWM or sampling clocks. IC Role / Device Role / Timing Role: Dual counter configured as cascaded 4-bit dividers (1:16 × 1:16 = 1:256), with nMR enabling synchronized reset across stages. Use Value: Eliminates need for microcontroller-based division; achieves deterministic jitter-free division with hardware latency <41 ns. |
Use Scenario: Implementing a 16-second real-time delay using a 1 Hz reference clock fed into one counter section. IC Role / Device Role / Timing Role: Single 4-bit counter operating in free-run mode, with decoded outputs (e.g., 1Q3) triggering timeout events. Use Value: Provides accurate, low-power timing without software overhead or crystal oscillator dependency. |
| Multistage Synchronous Counter | Industrial Encoder Interface |
Use Scenario: Building an 8-bit counter by cascading both sections with shared clock and reset, driving LED displays or position registers. IC Role / Device Role / Timing Role: Two 4-bit synchronous counters operating in lockstep, with carry-out from first stage feeding clock enable of second. Use Value: Delivers glitch-free 8-bit binary count with single-cycle propagation through both sections (max 82 ns at 6 V). |
Use Scenario: Decoding quadrature encoder pulses in motor control, where direction and step count are derived from phase relationships. IC Role / Device Role / Timing Role: One counter tracks A-phase edges, the other tracks B-phase edges; outputs feed combinational logic for direction detection. Use Value: Enables hardware-accelerated, sub-microsecond resolution position tracking without CPU polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4-bit synchronous counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC4040PW,118 | Single 12-bit ripple counter; no dual-section architecture or dual-clock edge support. | Lacks independent clock inputs and asynchronous reset per section - unsuitable for split-clock or synchronized dual-stage designs. | Select only if 12-bit depth is required and edge-selectable clocking is unnecessary. |
| SN74LV4040APWR | 12-bit ripple counter with LV logic (1.65–5.5 V); higher ICC (160 μA max) and slower tpd (100 ns typ at 5 V). | No dual-counter isolation or programmable clock-edge selection - limits flexibility in multi-domain timing systems. | Prefer only when legacy TI footprint compatibility is mandatory and speed/power trade-offs are acceptable. |
Compared with 74HC4520DB,112, the 74HC4040 offers greater bit depth but sacrifices dual-clock flexibility and synchronous operation, while SN74LV4040APWR trades speed and power efficiency for broader voltage compatibility - making the 74HC4520DB,112 optimal for precision dual-stage, edge-configurable counting.
Availability
74HC4520DB,112 is available at Aetrix Electronics and suitable for industrial automation controllers, test equipment timing modules, and consumer electronics frequency synthesis requiring stable component supply across extended temperature ranges.
Supply support for 74HC4520DB,112 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 discrete components optimized for efficiency and miniaturization in mass-market electronics.
The 74HC4520 belongs to Nexperia's HC-series high-speed CMOS logic family, designed specifically for low-power, wide-voltage-range digital timing and control applications in industrial, computing, and communications systems.
FAQ
What clock edge does 74HC4520DB,112 respond to on pin 1 (1CP0)?
Pin 1 (1CP0) responds to the LOW-to-HIGH transition - but only when pin 2 (1CP1) is held HIGH. This edge-selectable behavior allows the same physical pin to serve as either primary clock or clock-enable depending on the state of the companion input.
Can 74HC4520DB,112 operate reliably at 3.3 V supply?
Yes - the 74HC4520DB,112 is fully specified from 2.0 V to 6.0 V. At 3.3 V, VIH = 2.31 V (min), VIL = 1.09 V (max), and tpd = 35 ns (typ), meeting standard 3.3 V CMOS interface requirements with 1.2 V noise margin.
Is the SO16 package of 74HC4520DB,112 RoHS-compliant and lead-free?
Yes - the 74HC4520DB,112 in SOT109-1 (SO16) package is manufactured per RoHS Directive 2011/65/EU and is lead-free, halogen-free, and compliant with Nexperia's environmental specifications as documented in their product change notifications.
How is the asynchronous reset (nMR) implemented internally?
The nMR input feeds directly to the reset terminal of all eight flip-flops (four per counter), forcing Q outputs LOW independently of clock edges or internal state - verified by functional table entry "X X H → nQ0–nQ3 = LOW" with no timing dependency on nCP0/nCP1 transitions.
74HC4520DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Binary Counter
- Direction:
- Up
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Reset:
- Asynchronous
- Timing:
- Synchronous
- Count Rate:
- 69 MHz
- Trigger Type:
- Positive, Negative
- Voltage - Supply:
- 2 V ~ 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HC4520DB,112 FAQ
1.How can I place an order for 74HC4520DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC4520DB,112 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 74HC4520DB,112 reliable?
The price and inventory of 74HC4520DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC4520DB,112 is usually 5 days.
3.What payment methods are accepted for 74HC4520DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC4520DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC4520DB,112?
74HC4520DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC4520DB,112 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 74HC4520DB,112?
For technical support, including 74HC4520DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC4520DB,112 requirements.
6.How does Aetrix verify that 74HC4520DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HC4520DB,112 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 74HC4520DB,112 meets industry standards.
7.What is the process for return or replacement of 74HC4520DB,112?
All 74HC4520DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC4520DB,112, 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 74HC4520DB,112 part is unused and in its original packaging.
Return procedure for 74HC4520DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC4520DB,112 Tags
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