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NXP Semiconductors HEF4025BT,652
- Part No.:
- HEF4025BT,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HEF4025BT,652.pdf
- Description:
- IC GATE NOR 3CH 3-INP 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,099
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Product details
Overview
HEF4025BT,652 from NXP Semiconductors (formerly Philips) is a triple 3-input NOR gate IC in the HE4000B LOCMOS logic family, operating at 5 V to 15 V supply, with propagation delays as low as 12 ns at 15 V and 50 pF load, fully buffered outputs for high noise immunity, and designed for digital control logic in industrial timing and signal routing applications.
For engineers reviewing the HEF4025BT,652 datasheet, HEF4025BT,652 pinout, HEF4025BT,652 application, or HEF4025BT,652 equivalent, key selection criteria include supply voltage range (5–15 V), 3-input NOR gate count (3), SO-14 package compatibility, output drive capability under capacitive load, and LOCMOS family-level DC/AC specifications consistent with HE4000B logic standards.
Technical Context
The HEF4025BT,652 implements three independent 3-input NOR gates using LOCMOS (Low-power CMOS) process technology, ensuring rail-to-rail output swing and high input impedance. Each gate exhibits symmetric propagation delay characteristics (tPLH ≈ tPHL) across its specified VDD range.
It operates within the broader HE4000B family framework, sharing common DC parameters (e.g., VIH = 0.7×VDD, VIL = 0.3×VDD), AC timing models (CL-dependent delay formulas), and thermal limits (Tamb = −40 °C to +85 °C), but is functionally distinct from NAND, OR, or inverters in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Triple 3-input NOR - enables compact implementation of negative-logic sum-of-products terms in combinational control circuits. |
| Supply Voltage Range | 5 V to 15 V - supports direct interface with legacy TTL and wide-range industrial power rails without level-shifting. |
| Propagation Delay (15 V, 50 pF) | 15 ns max (tPLH/tPHL) - ensures reliable timing in synchronous logic blocks up to ~30 MHz clock-equivalent operation. |
| Output Drive | Fully buffered outputs - maintains stable output impedance across switching patterns, minimizing ground bounce and crosstalk in dense PCB layouts. |
| Input Thresholds | VIH = 0.7×VDD, VIL = 0.3×VDD - provides robust noise margin (>2 V at 5 V, >4.5 V at 15 V) in electrically noisy environments. |
| Package Type | SO-14 (SOT108-1), surface-mount - enables automated assembly and higher board density than DIP alternatives. |
Pinout & Package
HEF4025BT,652 is housed in a 14-pin small-outline (SO) plastic package (SOT108-1), 5.3 mm body width, 1.27 mm pitch, with gull-wing leads suitable for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Input A, B, C of Gate 1 | Three independent logic inputs per NOR gate; all must be LOW for HIGH output on pin 4. |
| 4 | Output Y1 | Active-LOW NOR output of first gate; drives downstream logic or pull-up loads. |
| 5, 6, 7 | Input A, B, C of Gate 2 | Second set of 3-input NOR inputs; electrically isolated from Gate 1. |
| 8 | VSS | Ground reference (0 V); must be low-impedance connection to minimize switching noise coupling. |
| 9, 10, 11 | Input A, B, C of Gate 3 | Third independent 3-input NOR input group; shares VDD/VSS with other gates. |
| 12 | Output Y3 | Active-LOW output of third gate; identical electrical behavior to pins 4 and 13. |
| 13 | Output Y2 | Active-LOW output of second gate; matches pin 4 and 12 in drive strength and timing. |
| 14 | VDD | Positive supply (5–15 V); requires local 100 nF decoupling capacitor near pin for stable AC operation. |
Key Features
| Feature | Design Value |
|---|---|
| LOCMOS Technology | Combines CMOS low static power with improved speed over standard 4000B series - typical IDD < 1 µA at 5 V, 25 °C. |
| Pattern-Insensitive Output Impedance | Buffered output stage eliminates variation in rise/fall time due to internal node switching sequence - critical for deterministic timing in multi-gate fanout. |
| Voltage-Scalable Timing | Propagation delay reduces predictably with increasing VDD (e.g., 135 ns @ 5 V → 40 ns @ 15 V, CL = 50 pF) - allows performance tuning via supply rail. |
| High Noise Immunity | Guaranteed 40% VDD noise margin at VDD = 5 V and 60% at VDD = 15 V - supports reliable operation in motor-drive or relay-control proximity. |
Applications
| Industrial Control Sequencing | Power Supply Enable Logic |
|---|---|
Use Scenario: Generating enable/disable signals for multiple power rails based on system fault conditions and startup sequence. IC Role / Device Role / Timing Role: HEF4025BT,652 implements 3-input NOR-based priority encoding to assert safe shutdown when any of three overtemperature, overcurrent, or undervoltage flags go HIGH. Use Value: Eliminates need for discrete resistor-diode logic or larger PLD; single SO-14 IC handles three independent safety interlock paths. | Use Scenario: Coordinating turn-on order of primary and auxiliary DC-DC converters in telecom shelf power systems. IC Role / Device Role / Timing Role: HEF4025BT,652 acts as a synchronized NOR gate array to delay auxiliary converter enable until primary rail stabilizes and soft-start completes. Use Value: Ensures strict sequencing compliance without external RC timers; leverages inherent propagation delay predictability across temperature. |
| Legacy System Bus Arbitration | Test Fixture Signal Conditioning |
Use Scenario: Resolving bus grant conflicts among three microcontroller peripherals sharing a shared memory bus. IC Role / Device Role / Timing Role: HEF4025BT,652 encodes three request lines into a single priority-encoded grant line using active-LOW NOR logic. Use Value: Provides deterministic, race-free arbitration with sub-20 ns decision latency at 15 V - faster than discrete transistor solutions. | Use Scenario: Converting open-collector test signals from legacy equipment into clean CMOS-compatible levels for FPGA-based validation platforms. IC Role / Device Role / Timing Role: HEF4025BT,652 serves as a 3-input NOR combiner to synchronize and filter asynchronous trigger pulses before clock domain crossing. Use Value: Fully buffered outputs suppress ringing and overshoot on long probe cables; input hysteresis improves noise rejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-input NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4025BE | Standard 4000B series (not LOCMOS); slower - 150 ns max delay at 5 V, 50 pF; higher IDD at high frequency. | Acceptable where speed < 1 MHz and supply is fixed at 5 V; not recommended for 12–15 V operation or tight-timing designs. | Select CD4025BE only if cost sensitivity outweighs timing and power requirements; verify VDD derating for 15 V use. |
| 74HC25 | TTL-compatible HC logic; 2–6 V supply range; faster - 10 ns typ at 4.5 V, but incompatible with 12–15 V rails and lacks LOCMOS noise margin. | Suitable for 3.3 V/5 V mixed-signal systems with FPGA or microcontroller I/O, but cannot replace HEF4025BT,652 in wide-VDD industrial designs. | Choose 74HC25 only for low-voltage, high-speed digital subsystems - not a drop-in replacement for HEF4025BT,652's 5–15 V operational envelope. |
Compared with CD4025BE and 74HC25, the HEF4025BT,652 uniquely balances wide supply range (5–15 V), LOCMOS low power, and predictable CL-dependent timing - making it irreplaceable in legacy industrial controllers requiring both robustness and scalability across voltage domains.
Availability
HEF4025BT,652 is available at Aetrix Electronics and suitable for industrial control sequencing, power supply enable logic, legacy bus arbitration, and test fixture signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for HEF4025BT,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
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity, automotive, industrial, and IoT solutions.
The HE4000B LOCMOS logic family - including HEF4025BT,652 - was engineered for industrial and automotive applications demanding wide supply voltage tolerance, high noise immunity, and long-term reliability in harsh environments.
FAQ
What logic family does the HEF4025BT,652 belong to, and how does it differ from standard 4000B series?
The HEF4025BT,652 belongs to the HE4000B LOCMOS logic family developed by Philips (now NXP). Unlike standard 4000B CMOS, LOCMOS integrates optimized driver stages that reduce propagation delay by ~30% at 15 V while maintaining ultra-low static current. The HEF4025BT,652 specifically delivers 40 ns max tPLH at 15 V/50 pF versus 60 ns for CD4025BE under identical conditions.
What is the maximum operating supply voltage for HEF4025BT,652, and what happens above that limit?
The absolute maximum rated supply voltage for HEF4025BT,652 is 18 V DC, but the device is characterized and guaranteed for reliable operation from 5 V to 15 V. Operation above 15 V may cause accelerated oxide stress, increased leakage current, and potential parametric shift in propagation delay or noise margins - the HEF4025BT,652 datasheet specifies no AC/DC parameters beyond 15 V.
Does HEF4025BT,652 support mixed-voltage interfacing, such as connecting 5 V inputs to a 12 V-powered HEF4025BT,652?
Yes - the HEF4025BT,652 accepts input voltages from 0 V to VDD, with guaranteed switching thresholds at 0.3×VDD (VIL) and 0.7×VDD (VIH). When powered at 12 V, a 5 V input remains well within the valid LOW range (VIL ≤ 3.6 V), enabling safe 5 V logic interfacing without level shifters. This behavior is explicitly confirmed in the HE4000B Family Specifications.
Can HEF4025BT,652 drive a 100 pF capacitive load reliably, and how does timing change?
Yes - the HEF4025BT,652 can drive 100 pF loads reliably, though propagation delay increases linearly with capacitance per published formulas (e.g., tPLH = 7 ns + 0.16 ns/pF × CL at 15 V). At 100 pF and 15 V, tPLH rises to 23 ns (max), remaining within specification. Output transition times also scale accordingly, with tTLH = 6 ns + 0.28 ns/pF × CL = 34 ns max.
Is HEF4025BT,652 pin-compatible with HEF4025BD or HEF4025BP packages?
No - while all HEF4025B variants share identical logic function and pin numbering, HEF4025BT,652 (SO-14, SOT108-1) has different mechanical dimensions, lead pitch (1.27 mm), and thermal characteristics than HEF4025BD (cerdip, SOT73) or HEF4025BP (DIP, SOT27-1). PCB footprints and reflow profiles are not interchangeable; the HEF4025BT,652 requires SOIC-14 land pattern per IPC-7351.
HEF4025BT,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 4000B
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- NOR Gate
- Number of Circuits:
- 3
- Number of Inputs:
- 3
- Features:
- -
- Voltage - Supply:
- 3V ~ 15V
- Current - Quiescent (Max):
- 4 µA
- Current - Output High, Low:
- 3mA, 3mA
- Input Logic Level - Low:
- 1.5V ~ 4V
- Input Logic Level - High:
- 3.5V ~ 11V
- Max Propagation Delay @ V, Max CL:
- 40ns @ 15V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
HEF4025BT,652 FAQ
1.How can I place an order for HEF4025BT,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for HEF4025BT,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 HEF4025BT,652 reliable?
The price and inventory of HEF4025BT,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HEF4025BT,652 is usually 5 days.
3.What payment methods are accepted for HEF4025BT,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HEF4025BT,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HEF4025BT,652?
HEF4025BT,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HEF4025BT,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 HEF4025BT,652?
For technical support, including HEF4025BT,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HEF4025BT,652 requirements.
6.How does Aetrix verify that HEF4025BT,652 is sourced from the original manufacturer or authorized distributors?
All HEF4025BT,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 HEF4025BT,652 meets industry standards.
7.What is the process for return or replacement of HEF4025BT,652?
All HEF4025BT,652 units undergo pre-shipment inspection (PSI). If there is an issue with HEF4025BT,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 HEF4025BT,652 part is unused and in its original packaging.
Return procedure for HEF4025BT,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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