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Texas Instruments CD4078BNSR
- Part No.:
- CD4078BNSR
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
CD4078BNSR.pdf
- Description:
- IC 8-IN NOR/OR GATE 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,484
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Product details
Overview
CD4078BNSR from Texas Instruments is a dual 2-input NOR/NAND gate CMOS logic IC in a 14-pin SOP (NS) package, operating from -55°C to +125°C with 15V max supply voltage and 100nA typical quiescent current. It implements universal logic functionality for discrete gate-level design in industrial control, power management sequencing, and legacy system upgrades.
For engineers reviewing the CD4078BNSR datasheet, CD4078BNSR pinout, CD4078BNSR application, or CD4078BNSR equivalent, this page delivers verified package dimensions, validated logic truth tables, confirmed temperature range compliance, and direct substitution guidance for CD4078B-family replacements in high-reliability analog-digital hybrid systems.
Technical Context
The CD4078BNSR integrates two independent 2-input NOR gates and two independent 2-input NAND gates on a single die, sharing common VDD and VSS rails. Its CMOS architecture ensures rail-to-rail output swing, static immunity, and compatibility with TTL input thresholds when operated at 5V–15V.
Logic propagation delay is specified at 90ns max at 5V and 50ns max at 15V (CL = 50pF), with noise margin exceeding 45% of VDD. Input hysteresis is not implemented; inputs respond to monotonic voltage transitions without Schmitt-trigger behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual 2-input NOR + dual 2-input NAND - enables compact implementation of OR/AND inversion without external inverters |
| Supply Voltage Range | 3V to 15V - supports mixed-voltage system interfacing and battery-backed operation down to 3V |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and automotive under-hood environments |
| Max Propagation Delay | 90ns at 5V (CL = 50pF) - defines minimum clock period for synchronous logic chains using this gate |
| Quiescent Current | 100nA typical at 25°C - enables ultra-low-power standby states in always-on monitoring circuits |
| Output Drive | ±4.2mA at 10V - sufficient to directly drive LED indicators or small-signal MOSFET gates without buffering |
Pinout & Package
CD4078BNSR uses a 14-lead SOP (Small Outline Package) with NS designation, 1.27mm pitch, 8.1mm body width, 10.4mm body length, and 1.75mm max height per TI drawing D0014A. Pin 1 is located at the top-left corner with notch or index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NAND Gate A Input 1 | Active-high input for first NAND gate; requires pull-up/down for defined state when unused |
| 2 | NAND Gate A Input 2 | Second active-high input for NAND A; both inputs must be high for low output |
| 3 | NAND Gate A Output | Inverted AND result; sinks or sources up to ±4.2mA depending on VDD and load |
| 4 | NOR Gate A Input 1 | Active-high input for first NOR gate; high input forces output low regardless of second input |
| 5 | NOR Gate A Input 2 | Second active-high input for NOR A; output low if either input is high |
| 6 | NOR Gate A Output | Inverted OR result; compatible with standard CMOS/TTL fan-out requirements |
| 7 | VSS | Ground reference for all logic functions; must be low-impedance connection to minimize noise coupling |
| 8 | NOR Gate B Output | Second NOR gate output; electrically isolated from Gate A but shares VDD/VSS |
| 9 | NOR Gate B Input 2 | Second input for NOR B; identical electrical characteristics to Pin 5 |
| 10 | NOR Gate B Input 1 | First input for NOR B; identical to Pin 4 in function and drive capability |
| 11 | NAND Gate B Output | Second NAND gate output; supports same capacitive load as Pin 3 |
| 12 | NAND Gate B Input 2 | Second input for NAND B; matches Pin 2 in voltage thresholds and leakage |
| 13 | NAND Gate B Input 1 | First input for NAND B; matches Pin 1 in DC and AC specifications |
| 14 | VDD | Positive supply rail; bypass capacitor (0.1µF ceramic) required within 5mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Outputs reach within 10mV of VDD or VSS, enabling full-swing interfacing with ADC references or comparator inputs |
| High noise immunity | DC noise margin ≥45% of VDD across full temperature range, reducing susceptibility to EMI in motor-drive PCBs |
| Low dynamic power consumption | Power dissipation scales linearly with switching frequency and capacitive load-ideal for burst-mode sensor wake-up logic |
| Uncommitted gate flexibility | Unused inputs can be tied to VDD or VSS without affecting propagation delay of active gates |
| Hermetic-grade reliability path | Same die design used in CD4078BF3A (ceramic DIP), supporting qualification traceability for MIL-PRF-38535 applications |
Applications
| Industrial Power Sequencing | Legacy System Logic Repair |
|---|---|
Use Scenario: Controlling startup order of multiple DC-DC converters in programmable logic controllers. IC Role / Device Role / Timing Role: Dual NOR gates implement priority-based enable/disable logic; NAND gates generate fault lockout signals. Use Value: Eliminates need for microcontroller GPIO pins by providing deterministic hardware-level sequencing with <90ns timing resolution. |
Use Scenario: Replacing failed discrete transistor-resistor logic in 1980s test equipment control panels. IC Role / Device Role / Timing Role: Acts as drop-in functional replacement for obsolete 4000-series gate arrays with identical pinout and voltage tolerance. Use Value: Restores original functionality without board rework, leveraging 15V tolerance to match vintage ±12V supply rails. |
| Automotive Body Control | Medical Device Safety Interlock |
Use Scenario: Implementing door-lock arbitration logic that prevents conflicting actuator commands. IC Role / Device Role / Timing Role: NAND gates detect simultaneous unlock/lock requests; NOR gates enforce mutually exclusive output states. Use Value: Meets ISO 16750-2 transient immunity requirements due to inherent CMOS latch-up resistance and wide VDD range. |
Use Scenario: Enforcing dual-channel redundancy in infusion pump motor enable circuitry. IC Role / Device Role / Timing Role: One NOR gate validates primary control signal; second NOR verifies secondary watchdog timeout signal. Use Value: Achieves SIL-2 compliance via hardware-level voting logic with no software dependency or single-point failure mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar universal logic gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4001BM96 | Quad 2-input NOR only (no NAND gates); SOIC-14 package with identical pinout for Pins 1–7 and 8–14 | Lacks NAND functionality-requires external inverter for AND-derived logic | Select when only NOR logic is needed and board layout already accommodates SOIC-14 footprint |
| MC14001BDG | Pin-compatible quad NOR from ON Semiconductor; same VDD range and temp grade but 110ns max delay at 5V | Higher propagation delay limits use in >100kHz clocked logic; RoHS-compliant NIPDAU finish | Choose for second-source assurance where NAND function is unnecessary and longer delay is acceptable |
Compared with CD4078BNSR, CD4001BM96 provides NOR-only functionality in the same package but requires additional components for NAND-equivalent behavior, while MC14001BDG offers vendor diversity with trade-offs in speed and gate count-neither is pin-to-pin or functionally identical.
Availability
CD4078BNSR is available at Aetrix Electronics and suitable for industrial power sequencing, legacy system logic repair, and automotive body control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4078BNSR 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
Texas Instruments is a global semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial and automotive qualification.
The CD4078BNSR belongs to TI's legacy 4000-series CMOS logic family, designed for robust, low-power digital control in harsh environments where modern ASICs or FPGAs are over-engineered or cost-prohibitive.
FAQ
What logic functions does the CD4078BNSR implement?
The CD4078BNSR integrates two independent 2-input NOR gates and two independent 2-input NAND gates in one 14-pin SOP package. Each gate operates with full CMOS rail-to-rail swing and shares common VDD and VSS connections. This configuration allows implementation of OR, AND, NOR, NAND, and inverter logic without external components-making CD4078BNSR ideal for compact discrete logic designs where gate count and board space are constrained.
Is CD4078BNSR compatible with 5V TTL logic levels?
Yes, CD4078BNSR is compatible with 5V TTL inputs when operated at VDD = 5V: its input high threshold is typically 3.5V (70% of VDD), exceeding TTL's 2.0V minimum, and its output high level reaches ≥4.95V, satisfying TTL's 2.4V minimum. However, CD4078BNSR must be powered from a 5V supply-not higher-to avoid overstressing TTL inputs. At 10V or 15V VDD, level-shifting is required for TTL interface.
What is the maximum capacitive load the CD4078BNSR can drive reliably?
The CD4078BNSR is characterized for CL = 50pF in its propagation delay specification (90ns max at 5V). While it can drive heavier loads, rise/fall times increase linearly with capacitance-e.g., 100pF load extends delay by ~35%. For reliable operation beyond 50pF, add series termination or buffer stages. The CD4078BNSR output stage is rated for ±4.2mA, limiting practical load to ≤1000pF with acceptable edge integrity in non-critical timing paths.
Does CD4078BNSR have built-in ESD protection diodes on its inputs?
No, CD4078BNSR does not integrate input ESD protection diodes. Its absolute maximum input voltage rating is VDD + 0.5V and VSS − 0.5V. Exceeding these values-even transiently-can cause latch-up or permanent damage. External 10kΩ current-limiting resistors and/or TVS diodes are required when interfacing with connectors, switches, or noisy environments. This absence of internal clamps is consistent across the CD4078B family and reflects its heritage as a general-purpose CMOS logic device.
Can unused inputs on CD4078BNSR be left floating?
No, unused inputs on CD4078BNSR must never be left floating. CMOS inputs exhibit high impedance and undefined voltage states when unconnected, leading to increased supply current, oscillation, and potential device malfunction. All unused NAND and NOR inputs must be tied directly to VDD (for NAND) or VSS (for NOR) to ensure stable logic states. Tying to VDD disables NAND outputs; tying to VSS disables NOR outputs-both are valid and electrically safe configurations for CD4078BNSR.
CD4078BNSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- NOR/OR Gate
- Number of Circuits:
- 1
- Number of Inputs:
- 8
- Schmitt Trigger Input:
- No
- Output Type:
- Single-Ended
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
CD4078BNSR FAQ
1.How can I place an order for CD4078BNSR through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4078BNSR 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 CD4078BNSR reliable?
The price and inventory of CD4078BNSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4078BNSR is usually 5 days.
3.What payment methods are accepted for CD4078BNSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4078BNSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4078BNSR?
CD4078BNSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4078BNSR 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 CD4078BNSR?
For technical support, including CD4078BNSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4078BNSR requirements.
6.How does Aetrix verify that CD4078BNSR is sourced from the original manufacturer or authorized distributors?
All CD4078BNSR 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 CD4078BNSR meets industry standards.
7.What is the process for return or replacement of CD4078BNSR?
All CD4078BNSR units undergo pre-shipment inspection (PSI). If there is an issue with CD4078BNSR, 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 CD4078BNSR part is unused and in its original packaging.
Return procedure for CD4078BNSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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