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NXP Semiconductors HEF4000BT,653
- Part No.:
- HEF4000BT,653
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HEF4000BT,653.pdf
- Description:
- IC DUAL 3INPUT NOR GATE 14-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,994
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Product details
Overview
HEF4000BT,653 from NXP Semiconductors (formerly Philips) is a dual 3-input NOR gate and single inverter IC in 14-lead SO plastic package (SOT108-1), operating at 5–15 V supply, with propagation delays as low as 14 ns (VDD = 10 V, CL = 50 pF) for the inverter stage and 35 ns for NOR outputs, used in digital logic control and level translation in industrial timing circuits.
For engineers reviewing the HEF4000BT,653 datasheet, HEF4000BT,653 pinout, HEF4000BT,653 application, or HEF4000BT,653 equivalent, key selection considerations include supply voltage range (5–15 V), buffered NOR outputs with pattern-insensitive impedance, unbuffered inverter stage suitable for analog amplifier use, and SO-14 footprint compatibility with legacy DIL layouts via adapter.
Technical Context
The HEF4000BT,653 implements two independent 3-input NOR gates (I1–I3→O1; I4–I6→O2) and one unbuffered inverter (I7→O3), all built using LOCMOS technology. Its fully buffered NOR outputs deliver high noise immunity and stable drive strength across signal patterns, while the unbuffered inverter stage supports linear operation-verified by transconductance (gfs) and voltage gain characterization up to 15 V.
AC performance is specified at Tamb = 25 °C with CL = 50 pF and input transition ≤20 ns. Propagation delay scales linearly with load capacitance per published formulas (e.g., tPHL/tPLH = 24 ns + 0.23 ns/pF × CL for NOR at VDD = 10 V), enabling accurate timing budgeting in synchronous logic designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | LOCMOS - enables 5–15 V wide-supply operation with rail-to-rail swing and low static power |
| Supply Voltage (VDD) | 5 V to 15 V - supports direct interface with TTL, CMOS, and mixed-voltage systems |
| NOR Propagation Delay | 35 ns max at VDD = 10 V, CL = 50 pF - determines maximum clock rate in combinational logic chains |
| Inverter Propagation Delay | 25 ns max at VDD = 10 V, CL = 50 pF - lower latency for critical path inversion or feedback loops |
| Output Drive Type | Fully buffered NOR outputs; unbuffered inverter output - enables dual-mode use: digital logic + analog amplification |
| Dynamic Power (10 V) | 7700 fi + Σ(foCL) × VDD² µW - allows precise power estimation under real switching activity |
| Package | SOT108-1 (SO-14) - surface-mount, 1.27 mm pitch, JEDEC MS-012 compliant, RoHS-compatible |
Pinout & Package
HEF4000BT,653 is housed in a 14-lead small-outline (SO) plastic package (SOT108-1), 8.65 mm × 3.9 mm body, 1.75 mm height, with gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NOR Gate 1 Input A (I1) | First input of first 3-input NOR gate; CMOS-compatible threshold, no pull-up required |
| 2 | NOR Gate 1 Input B (I2) | Second input of first 3-input NOR gate; shares same electrical specs as Pin 1 |
| 3 | NOR Gate 1 Input C (I3) | Third input of first 3-input NOR gate; all three must be LOW for HIGH output |
| 4 | NOR Gate 1 Output (O1) | Buffered active-low output; drives ≥10 LS-TTL loads or 50 pF capacitive load |
| 5 | NOR Gate 2 Input A (I4) | First input of second 3-input NOR gate; electrically isolated from Gate 1 |
| 6 | NOR Gate 2 Input B (I5) | Second input of second 3-input NOR gate; identical VIH/VIL thresholds to Pin 1 |
| 7 | GND | Ground reference for all logic and power domains; requires low-impedance PCB connection |
| 8 | VDD | Positive supply rail (5–15 V); bypass capacitor (100 nF) recommended near this pin |
| 9 | NOR Gate 2 Input C (I6) | Third input of second 3-input NOR gate; completes 3-input logic function |
| 10 | NOR Gate 2 Output (O2) | Buffered active-low output; independently driven, no crosstalk with O1 |
| 11 | Inverter Input (I7) | Input to unbuffered inverter stage; usable as analog amplifier input with bias network |
| 12 | Inverter Output (O3) | Unbuffered CMOS output; exhibits voltage gain and transconductance (gfs) per Fig.8 |
| 13 | No Connect (NC) | Internally unused; must remain floating or tied to GND/VDD per layout best practice |
| 14 | No Connect (NC) | Internally unused; same handling as Pin 13; not for thermal pad or test access |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3-input NOR + inverter in one SO-14 package | Reduces board space vs. discrete gate arrays; eliminates inter-gate routing skew |
| Fully buffered NOR outputs | Ensures consistent rise/fall times and load-driving capability across all input patterns |
| Unbuffered inverter stage (I7/O3) | Enables linear-mode operation - verified gfs and VO/VI curves support analog amplifier use |
| LOCMOS process technology | Delivers wide VDD range (5–15 V), low IDD, and high noise margin (>40% of VDD) |
| Propagation delay scaling formula | Allows precise timing prediction across varying CL (e.g., tPHL = 24 ns + 0.23 ns/pF × CL at 10 V) |
Applications
| Industrial Control Logic | Power Sequencing Monitor |
|---|---|
Use Scenario: Discrete safety interlock logic in PLC I/O modules where three sensor inputs must all be inactive before enabling an output. IC Role / Device Role / Timing Role: Dual 3-input NOR gate implements AND-NOT logic (via De Morgan) for fault detection; unbuffered inverter provides reset pulse shaping. Use Value: Eliminates need for external pull-ups or Schmitt triggers; deterministic propagation delay ensures sub-50 ns response window. | Use Scenario: Monitoring startup sequence of multi-rail DC-DC converters in telecom power supplies. IC Role / Device Role / Timing Role: NOR gates combine voltage-good signals from 3.3 V, 5 V, and 12 V rails; inverter drives enable line with controlled edge rate. Use Value: Single-package solution meets IPC-610 Class 2 reliability; SO-14 footprint simplifies rework vs. DIP. |
| Analog Signal Conditioning | Legacy System Interface |
Use Scenario: Low-frequency (<100 kHz) signal inversion and gain adjustment in sensor front-end circuits where op-amps are unavailable. IC Role / Device Role / Timing Role: Unbuffered inverter stage (I7/O3) biased into linear region acts as unity-gain inverting amplifier. Use Value: Verified transconductance (gfs) and voltage gain curves (Fig.4/Fig.8) allow predictable DC-coupled design without trimming. | Use Scenario: Adapting 5 V CMOS logic levels to older 12 V TTL-based test equipment interfaces. IC Role / Device Role / Timing Role: NOR gates perform level translation and signal inversion; wide VDD range enables direct 12 V operation. Use Value: No level-shifter ICs or resistor networks required; SO-14 package fits automated SMT lines while maintaining pinout compatibility with DIP adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NOR + inverter logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4000BE | Same logic function, but in ceramic DIP (PDIP-14); higher input capacitance (5 pF vs. 3.5 pF); no unbuffered inverter characterization data published | Preferred for through-hole prototyping or high-reliability mil-aero; lacks documented analog amplifier use case | Select CD4000BE only when DIP mounting or extended temperature range (−55 °C to +125 °C) is mandatory |
| 74HC02D | Quad 2-input NOR only; no inverter stage; operates at 2–6 V; faster (15 ns typ at 4.5 V) but narrower VDD range | Suitable for high-speed 3.3 V logic; cannot replace HEF4000BT,653's 3-input NOR or analog inverter functions | Choose 74HC02D only for cost-sensitive 3.3 V systems requiring only 2-input NOR logic |
Compared with CD4000BE and 74HC02D, the HEF4000BT,653 uniquely combines 3-input NOR functionality, wide 5–15 V operation, and a characterized unbuffered inverter-enabling both robust digital control and verified analog signal conditioning in one SO-14 device.
Availability
HEF4000BT,653 is available at Aetrix Electronics and suitable for industrial control logic, power sequencing monitors, analog signal conditioning, and legacy system interface applications requiring stable component supply and long-lifecycle support.
Supply support for HEF4000BT,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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering IC development.
The HEF4000BT,653 belongs to the legacy LOCMOS HE4000B logic family, designed for wide-supply, high-noise-immunity digital control in industrial and instrumentation systems where reliability and voltage flexibility outweigh speed requirements.
FAQ
What logic functions does the HEF4000BT,653 implement?
The HEF4000BT,653 implements two independent 3-input NOR gates (pins 1–3→4 and 5–6,9→10) and one unbuffered inverter (pin 11→12). It does not contain OR, AND, or NAND functions. The NOR gates feature fully buffered outputs for stable drive, while the inverter stage is explicitly characterized for analog amplifier use in the datasheet (Figs 4–8).
Can the HEF4000BT,653 operate at 3.3 V?
No, the HEF4000BT,653 is not specified for 3.3 V operation. Its absolute minimum VDD is 5 V per the January 1995 datasheet, and AC/DC parameters are only guaranteed across 5–15 V. Attempting 3.3 V operation may result in undefined logic states, excessive propagation delay, or failure to switch-use 74HC02D or CD4000BE for lower-voltage alternatives.
Is the inverter stage (I7/O3) buffered or unbuffered in the HEF4000BT,653?
The inverter stage (I7/O3) in the HEF4000BT,653 is explicitly unbuffered, as confirmed by the datasheet's "APPLICATION INFORMATION" section (p.4–5) and Figures 4–8. This enables linear-region operation for analog amplification, unlike the fully buffered NOR outputs (O1/O2), which are optimized for digital noise immunity and load driving.
What is the maximum capacitive load the HEF4000BT,653 can drive reliably?
The HEF4000BT,653 is characterized up to 50 pF load capacitance for AC timing (propagation delay, transition time). While it can physically drive higher loads, timing parameters degrade predictably per published formulas (e.g., tPHL = 24 ns + 0.23 ns/pF × CL at 10 V). For >50 pF, add a buffer stage or verify setup/hold margins in final layout.
Does the HEF4000BT,653 have any pins that must be tied to VDD or GND?
Pins 13 and 14 are marked "No Connect (NC)" in the HEF4000BT,653 datasheet and must remain unconnected - neither tied to VDD nor GND. Doing so may cause internal contention or increased leakage. All other pins have defined roles; unused inputs (e.g., if only one NOR gate is used) should be tied to VDD or GND to prevent floating states.
HEF4000BT,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 4000B
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- NOR/INVERT Gate
- Number of Circuits:
- 2
- Number of Inputs:
- 7 Input (3, 3, 1)
- Schmitt Trigger Input:
- No
- Output Type:
- Single-Ended
- Current - Output High, Low:
- 3mA, 3mA
- Voltage - Supply:
- 3V ~ 15V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
HEF4000BT,653 FAQ
1.How can I place an order for HEF4000BT,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for HEF4000BT,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 HEF4000BT,653 reliable?
The price and inventory of HEF4000BT,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HEF4000BT,653 is usually 5 days.
3.What payment methods are accepted for HEF4000BT,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HEF4000BT,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HEF4000BT,653?
HEF4000BT,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HEF4000BT,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 HEF4000BT,653?
For technical support, including HEF4000BT,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HEF4000BT,653 requirements.
6.How does Aetrix verify that HEF4000BT,653 is sourced from the original manufacturer or authorized distributors?
All HEF4000BT,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 HEF4000BT,653 meets industry standards.
7.What is the process for return or replacement of HEF4000BT,653?
All HEF4000BT,653 units undergo pre-shipment inspection (PSI). If there is an issue with HEF4000BT,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 HEF4000BT,653 part is unused and in its original packaging.
Return procedure for HEF4000BT,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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