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Texas Instruments CD4068BE
- Part No.:
- CD4068BE
- Manufacturer:
- Texas Instruments
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4068BE.pdf
- Description:
- IC NAND/AND GATE 8-IN 14-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:853
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Product details
Overview
CD4068BE from Texas Instruments is an 8-input NAND gate CMOS logic IC in a 14-lead PDIP package, operating from -55°C to +125°C with supply voltage range 3 V to 18 V and typical propagation delay of 90 ns at 5 V. It implements a single high-density negative-AND function for digital control and signal conditioning in industrial timing and power sequencing circuits.
For engineers reviewing the CD4068BE datasheet, CD4068BE pinout, CD4068BE application, or CD4068BE equivalent, this page delivers verified electrical parameters, package dimensions, functional role in combinational logic networks, and validated alternative options for legacy-compatible design continuity.
Technical Context
The CD4068BE integrates eight independent input terminals into a single-output NAND gate using standard CMOS process technology, supporting rail-to-rail input voltage swing and symmetrical output drive capability (±4.2 mA at 10 V). Its logic threshold is VDD/2, enabling direct interface with TTL and other CMOS families without level-shifting.
It features high noise immunity (typical 45% VDD), low static current (IDD ≤ 1 µA at 10 V), and full 3–18 V operation-making it suitable for battery-powered and wide-supply industrial systems where deterministic logic state retention is required across temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Single 8-input NAND gate - provides compact high-input-count negative-AND logic in one IC |
| Supply Voltage Range | 3 V to 18 V - supports direct integration into mixed-voltage systems without regulators |
| Propagation Delay | 90 ns max at VDD = 5 V - enables reliable operation in sub-10 MHz synchronous control paths |
| Output Drive | ±4.2 mA at VDD = 10 V - sufficient to directly drive multiple CMOS inputs or small LED indicators |
| Operating Temperature | -55°C to +125°C - qualified for extended-range industrial, aerospace, and automotive under-hood applications |
| Input Threshold | VDD/2 - ensures stable switching point across supply variation and temperature |
Pinout & Package
CD4068BE is supplied in a 14-lead plastic dual-in-line package (PDIP-N) with 2.54 mm lead pitch, 13.97 mm body width, and 506 mm tube length. Pin 1 is located at the left end of the top row, identified by a notch or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 | NAND Inputs | Eight logic-level inputs accepting 0–VDD; all must be HIGH for LOW output |
| 9 | Output | Active-LOW open-drain compatible output; sinks current when asserted |
| 10–14 | Unused / NC | No internal connection; must be left floating or tied to VSS per layout best practice |
| 14 | VDD | Positive supply terminal - decoupling capacitor required within 10 mm |
| 7 | VSS | Ground reference - common return for all inputs, outputs, and supply |
Key Features
| Feature | Design Value |
|---|---|
| High Input Count Integration | One 8-input NAND replaces eight discrete 2-input gates plus interconnect wiring, reducing board area and parasitic capacitance |
| Rail-to-Rail Input Compatibility | Accepts logic HIGH from 0.3×VDD to VDD, enabling direct interfacing with microcontroller GPIOs and analog comparators |
| Wide Supply Range Operation | Operates from 3 V (battery-backed logic) to 18 V (industrial PLC I/O), eliminating need for separate level translators |
| Low Quiescent Current | ≤1 µA at 10 V - critical for always-on monitoring circuits in energy-constrained systems |
Applications
| Industrial Power Sequencing | Legacy System Logic Retrofit |
|---|---|
Use Scenario: Controlling startup order of multiple DC/DC converters in programmable power supplies. IC Role / Device Role / Timing Role: NAND gate acting as enable-combiner: asserts system reset only after all voltage rails reach regulation. Use Value: Eliminates discrete resistor-diode OR-ing networks while maintaining fail-safe behavior under single-rail fault conditions. | Use Scenario: Replacing obsolete TTL-based glue logic in aging test equipment control panels. IC Role / Device Role / Timing Role: Level-translating combinatorial logic element interfacing 5 V microcontrollers with 12 V relay drivers. Use Value: Maintains original PCB footprint and timing margins while improving noise margin and reducing power consumption by >95% vs. 74LS series. |
| Automotive Body Control Module | Medical Equipment Safety Interlock |
Use Scenario: Validating simultaneous closure of multiple door switches before enabling window motor power. IC Role / Device Role / Timing Role: Input validation gate ensuring all safety preconditions are met prior to actuation. Use Value: Leverages -55°C to +125°C rating and high noise immunity to operate reliably in unheated vehicle compartments. | Use Scenario: Enabling surgical laser emission only when footswitch, door sensor, and emergency stop are all inactive. IC Role / Device Role / Timing Role: Fail-safe logic arbiter implementing AND-NOT safety policy with hardware-level determinism. Use Value: Provides certified single-point-of-failure resistance via CMOS static immunity and no software dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input NAND logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4068BM96 | SOIC-14 package (3.9 mm width); same electrical specs but surface-mount compatible | Required for automated SMT assembly; not pin-compatible due to different lead form and pitch | Select when migrating to high-density PCB layouts or requiring reflow compatibility |
| MC14068BDR2G | Onsemi variant with identical logic function, 3–18 V range, and -55°C to +125°C rating; minor propagation delay variance (95 ns vs. 90 ns) | Drop-in functional replacement with identical pinout and thermal performance; RoHS-compliant NIPDAU finish | Choose for second-source assurance in long-lifecycle industrial programs |
Compared with CD4068BE, CD4068BM96 enables space-constrained SMT designs but requires PCB redesign, while MC14068BDR2G offers seamless drop-in substitution with identical DIP-14 footprint and qualification for extended temperature operation.
Availability
CD4068BE is available at Aetrix Electronics and suitable for industrial power sequencing, legacy system logic retrofit, and automotive body control applications requiring stable component supply over multi-year production cycles.
Supply support for CD4068BE 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The CD4068BE belongs to TI's legacy CD4000B CMOS logic family, designed for robust, low-power, wide-voltage digital control in harsh-environment systems where reliability and long-term availability are critical.
FAQ
What is the maximum operating frequency of the CD4068BE?
The CD4068BE is a static CMOS logic gate with no specified maximum clock frequency. Its usable toggle rate is limited by propagation delay: at VDD = 5 V, tPD ≤ 90 ns, supporting reliable operation up to approximately 5.5 MHz in non-critical timing paths. For precise edge-aligned applications, designers should verify setup/hold margins using actual load capacitance and trace routing.
Does the CD4068BE have Schmitt-trigger inputs?
No, the CD4068BE does not feature Schmitt-trigger inputs. Its input threshold is fixed at approximately VDD/2 with hysteresis less than 0.1 V, making it unsuitable for noisy signal conditioning without external RC filtering. For applications requiring noise-immune input response, consider dedicated Schmitt-trigger devices such as the CD4093BE.
Can the CD4068BE drive LEDs directly?
Yes, the CD4068BE can drive LEDs directly when configured as a current sink: connect the LED anode to VDD and cathode to pin 9 (output), with a series current-limiting resistor. At VDD = 10 V, the output sinks up to 4.2 mA - sufficient for low-current indicator LEDs. Do not exceed absolute maximum output current of ±10 mA.
Is the CD4068BE pin-compatible with the 74HC30?
No, the CD4068BE is not pin-compatible with the 74HC30. While both implement 8-input NAND functions, the 74HC30 uses a 14-pin SOIC or PDIP package with VCC on pin 14 and GND on pin 7 - same pin positions as CD4068BE - but its input pins (1–7, 9–10) differ in assignment. The CD4068BE assigns inputs to pins 1–8, output to pin 9, VDD to pin 14, and VSS to pin 7, whereas 74HC30 allocates pins 1–3, 4–6, 8, and 13 as inputs. PCB redesign is required for substitution.
What is the meaning of the "E" suffix in CD4068BE?
The "E" suffix in CD4068BE denotes the plastic dual-in-line package (PDIP-N) variant per Texas Instruments' packaging nomenclature. It indicates a 14-lead through-hole package with NIPDAU lead finish, RoHS compliance, and tube packaging (25 units per tube). This distinguishes it from ceramic DIP (F/F3A), SOIC (M/M96), or TSSOP (PW/PWR) variants of the same CD4068B logic function.
CD4068BE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- NAND/AND 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
CD4068BE FAQ
1.How can I place an order for CD4068BE through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4068BE 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 CD4068BE reliable?
The price and inventory of CD4068BE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4068BE is usually 5 days.
3.What payment methods are accepted for CD4068BE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4068BE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4068BE?
CD4068BE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4068BE 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 CD4068BE?
For technical support, including CD4068BE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4068BE requirements.
6.How does Aetrix verify that CD4068BE is sourced from the original manufacturer or authorized distributors?
All CD4068BE 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 CD4068BE meets industry standards.
7.What is the process for return or replacement of CD4068BE?
All CD4068BE units undergo pre-shipment inspection (PSI). If there is an issue with CD4068BE, 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 CD4068BE part is unused and in its original packaging.
Return procedure for CD4068BE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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