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Nexperia USA Inc. HEF4528BT,652
- Part No.:
- HEF4528BT,652
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Multivibrators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HEF4528BT,652.pdf
- Description:
- IC MULTIVIBRATOR 35NS 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,261
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Product details
Overview
HEF4528BT,652 from Nexperia is a dual retriggerable and resettable monostable multivibrator IC in SO16 package, operating from 3 V to 15 V supply, delivering programmable pulse widths via external REXT/CEXT networks (e.g., 4.85 μs at VDD = 15 V, REXT = 10 kΩ, CEXT = 1 nF), with active-LOW clear inputs and complementary outputs - used for precision timing control in digital logic interfacing and pulse shaping circuits.
For engineers reviewing the HEF4528BT,652 datasheet, HEF4528BT,652 pinout, HEF4528BT,652 application, or HEF4528BT,652 equivalent, key selection considerations include its dual independent monostable architecture, wide voltage range compatibility, temperature-stable pulse width generation (±2% over VDD ±5%), and SO16 footprint suitability for space-constrained industrial control PCBs.
Technical Context
The HEF4528BT,652 implements two identical CMOS monostable multivibrators, each with dual edge-triggered inputs (nA: HIGH-to-LOW sensitive; nB: LOW-to-HIGH sensitive) and an asynchronous active-LOW clear (nCD) that forces nQ LOW and nQ HIGH while inhibiting further triggering. Pulse width tW is determined solely by external REXT and CEXT values using K × REXT × CEXT (K = 0.30 at 15 V).
Propagation delays are supply-voltage dependent: tPHL from nCD to nQ ranges from 30 ns (15 V) to 140 ns (5 V); transition times scale linearly with load capacitance (CL), e.g., tt = 6 ns + 0.28 ns/pF × CL at 15 V. Static operation ensures zero static current draw except during switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 15 V - supports direct interface with 5 V, 10 V, and 15 V logic families without level-shifting. |
| Pulse Width (tW) | 4.85 μs typical at VDD = 15 V, REXT = 10 kΩ, CEXT = 1 nF - enables precise one-shot timing for debounce or delay functions. |
| Propagation Delay (nCD → nQ) | 30 ns min at VDD = 15 V - ensures fast response to reset commands in real-time control systems. |
| Output Drive Strength | IOL = 2.4 mA min at VDD = 15 V - sufficient to directly drive TTL loads or small capacitive buses. |
| Operating Temperature | -40 °C to +85 °C - qualified for industrial ambient environments without derating. |
| Input Thresholds | VIH = 11.0 V, VIL = 4.0 V at VDD = 15 V - provides robust noise margin (>3 V) against supply ripple. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - reduces risk of handling damage in manual assembly or field service. |
Pinout & Package
HEF4528BT,652 is housed in a plastic SO16 (SOT109-1) package: 16-pin small outline, 3.9 mm body width, gull-wing leads, JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CEXT, 2CEXT (Pins 1, 15) | External capacitor ground node | Must be connected to VSS (ground); forms timing reference for both monostables. |
| 1REXT/CEXT, 2REXT/CEXT (Pins 2, 14) | Timing resistor/capacitor junction | Connects external REXT to VDD and CEXT to 1CEXT/2CEXT - sets pulse width tW. |
| 1CD, 2CD (Pins 3, 13) | Asynchronous clear input | Active-LOW; forces nQ LOW and blocks triggering until deasserted - critical for system-level reset coordination. |
| 1A, 2A (Pins 5, 11) | Falling-edge trigger input | Triggers positive output pulse on nQ when nB is LOW - used for clock-synchronized event capture. |
| 1B, 2B (Pins 4, 12) | Rising-edge trigger input | Triggers positive output pulse on nQ when nA is HIGH - enables edge-selectable timing initiation. |
| 1Q, 2Q (Pins 6, 10) | Primary output | Active-HIGH monostable output pulse - drives downstream logic or LED indicators directly. |
| 1Q, 2Q (Pins 7, 9) | Complementary output | Active-LOW inverted pulse - eliminates need for external inverters in differential timing paths. |
| VDD (Pin 16) | Positive supply | Accepts 3–15 V; powers both monostables and internal logic - simplifies multi-rail system design. |
| VSS (Pin 8) | Ground reference | Common return for all signals and timing components - must be low-impedance for stable pulse width. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monostables | Enables two separate timing functions (e.g., channel A delay + channel B reset) on single die - reduces board area and BOM count. |
| Retriggerable and resettable operation | Allows pulse extension during ongoing output (retrigger) or forced termination (reset) - essential for adaptive timing in motor control feedback loops. |
| Wide supply voltage range (3–15 V) | Eliminates need for dedicated voltage regulators in mixed-supply systems - interoperable with legacy 5 V and modern 12 V industrial rails. |
| Standardized symmetrical output characteristics | Matched VOH/VOL and IOL/IOH ensure consistent fan-out across logic families - avoids timing skew in cascaded timing chains. |
| JEDEC JESD13-B compliance | Guarantees interoperability with industry-standard test equipment and automated handlers - supports high-volume manufacturing validation. |
Applications
| Industrial Pushbutton Debounce | Serial Data Pulse Stretching |
|---|---|
|
Use Scenario: Mechanical pushbuttons in PLC I/O modules generate contact bounce lasting 5–20 ms, causing false edge detection in microcontroller GPIOs. IC Role / Device Role / Timing Role: HEF4528BT,652 acts as hardware debounce filter - one monostable triggered by button press generates a clean, fixed-duration logic pulse. Use Value: Eliminates software polling or RC+Schmitt circuits; pulse width set to 15 ms (REXT = 1 MΩ, CEXT = 15 pF) reliably suppresses all bounce artifacts. |
Use Scenario: Legacy UART peripherals require minimum pulse widths >100 ns on control lines (e.g., RTS/CTS), but FPGA-generated signals may fall below spec. IC Role / Device Role / Timing Role: Monostable configured as pulse stretcher - rising edge on nB extends narrow FPGA output into guaranteed 200 ns pulse on nQ. Use Value: Ensures reliable handshaking without FPGA firmware modification; uses only passive REXT/CEXT (10 kΩ/20 pF) for minimal component overhead. |
| Motor Driver Enable Timing | Test Equipment Trigger Synchronization |
|
Use Scenario: BLDC motor drivers require precise sequencing: enable signal must precede PWM by ≥500 ns to prevent shoot-through. IC Role / Device Role / Timing Role: HEF4528BT,652 generates controlled delay between MCU EN and PWM signals - second monostable triggered by EN produces delayed PWM-enable pulse. Use Value: Achieves deterministic 600 ns delay (REXT = 50 kΩ, CEXT = 12 pF) independent of MCU clock jitter or software latency. |
Use Scenario: Automated test systems synchronize multiple instruments (oscilloscope, DMM, power supply) using a common trigger line with variable edge rates. IC Role / Device Role / Timing Role: Dual monostable provides matched, edge-selectable trigger pulses - one channel for rising-edge sync, second for falling-edge sync. Use Value: Guarantees <10 ns inter-channel skew across -40 °C to +85 °C due to matched on-die propagation paths and temperature-compensated design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4528BE | Same functional topology but older TI CMOS process; higher typical propagation delay (200 ns at 5 V) and no CDM ESD rating. | Limited to ≤85 °C ambient; unsuitable for high-speed or ESD-prone factory-floor environments. | Prefer HEF4528BT,652 where faster timing, wider voltage range, or enhanced ESD robustness is required. |
| 74HC4538D | Single-supply 2–6 V operation only; lacks independent clear per channel; uses different timing equation (tW ≈ 0.7 × REXT × CEXT). | Cannot replace HEF4528BT,652 in 12 V systems or where per-channel reset is mandatory. | Select only for cost-sensitive 5 V-only designs where dual independent clears are unnecessary. |
Compared with CD4528BE and 74HC4538D, the HEF4528BT,652 offers broader supply flexibility (3–15 V vs. 5 V or 2–6 V), per-channel active-LOW clear, and superior ESD immunity - making it the preferred choice for industrial-grade timing where reliability and voltage interoperability are critical.
Availability
HEF4528BT,652 is available at Aetrix Electronics and suitable for industrial pushbutton debounce, serial data pulse stretching, motor driver enable timing, and test equipment trigger synchronization requiring stable component supply across extended temperature and voltage ranges.
Supply support for HEF4528BT,652 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 specializing in high-performance, high-reliability logic, analog, and discrete components, with manufacturing rooted in process technology leadership and automotive-grade quality systems.
The HEF4528BT,652 belongs to Nexperia's HEF4000B logic family - designed specifically for industrial and consumer applications demanding wide supply tolerance, robust noise immunity, and long-term parametric stability under thermal stress.
FAQ
What is the minimum pulse width achievable with HEF4528BT,652?
The shortest guaranteed pulse width is 20 ns at VDD = 15 V, achieved when nCD is held HIGH and nA/nB receive minimum-width valid triggers (20 ns LOW for nA, 20 ns HIGH for nB). This limit arises from internal gate delays and is specified in Table 7 under "minimum width" conditions.
Can unused inputs be left floating?
No. Unused inputs must be tied to VDD, VSS, or another driven input per Section 1 of the datasheet. Floating CMOS inputs cause increased supply current, unpredictable output states, and potential latch-up due to intermediate voltage levels violating noise margins.
How does supply voltage affect pulse width accuracy?
Pulse width variation over supply voltage is ±1% at VDD = 15 V and ±2% at VDD = 5 V (Table 7, ΔtW column), due to nonlinearities in the internal timing current source. For highest accuracy, regulate VDD or select REXT/CEXT values that minimize sensitivity to VDD drift.
Is HEF4528BT,652 qualified for automotive use?
No. The datasheet explicitly states "Non-automotive qualified products" in Section 15, and no AEC-Q100 qualification or automotive temperature grade (-40 °C to +125 °C) is specified. It is rated only for industrial temperature range (-40 °C to +85 °C).
HEF4528BT,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Monostable
- Independent Circuits:
- 2
- Schmitt Trigger Input:
- No
- Propagation Delay:
- 35 ns
- Current - Output High, Low:
- 3mA, 3mA
- Voltage - Supply:
- 3 V ~ 15 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
HEF4528BT,652 FAQ
1.How can I place an order for HEF4528BT,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for HEF4528BT,652 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 HEF4528BT,652 reliable?
The price and inventory of HEF4528BT,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HEF4528BT,652 is usually 5 days.
3.What payment methods are accepted for HEF4528BT,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HEF4528BT,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HEF4528BT,652?
HEF4528BT,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HEF4528BT,652 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 HEF4528BT,652?
For technical support, including HEF4528BT,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HEF4528BT,652 requirements.
6.How does Aetrix verify that HEF4528BT,652 is sourced from the original manufacturer or authorized distributors?
All HEF4528BT,652 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 HEF4528BT,652 meets industry standards.
7.What is the process for return or replacement of HEF4528BT,652?
All HEF4528BT,652 units undergo pre-shipment inspection (PSI). If there is an issue with HEF4528BT,652, 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 HEF4528BT,652 part is unused and in its original packaging.
Return procedure for HEF4528BT,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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