Texas Instruments CD4068BEE4

Overview

CD4068BEE4 from Texas Instruments is an 8-input NAND gate CMOS logic IC operating across -55°C to +125°C, with typical propagation delay of 90 ns at 5 V, supply voltage range of 3 V to 18 V, and fan-out capability of ≥10 TTL loads. It serves as a high-voltage, radiation-tolerant combinational logic element in industrial control sequencers and legacy instrumentation signal conditioning.

For engineers reviewing the CD4068BEE4 datasheet, CD4068BEE4 pinout, CD4068BEE4 application, or CD4068BEE4 equivalent, key selection considerations include its wide V_DD range, dual-in-line ceramic-compatible footprint, MIL-qualified variants, and compatibility with legacy 4000-series logic families in high-reliability analog-digital interface designs.

Technical Context

The CD4068BEE4 implements a single 8-input NAND function using standard CMOS process technology, delivering rail-to-rail output swing and symmetrical rise/fall times under capacitive load. Its input structure supports direct interfacing with TTL and other CMOS families without level-shifting.

Designed for operation in harsh environments, it features high noise immunity (typical V_NIH/V_NIL ≥ 45% V_DD), low static current (<100 nA at 25°C), and latch-up immunity per JEDEC JESD78. No internal pull-ups or Schmitt-trigger inputs are present.

Key Specifications

Pinout & Package

CD4068BEE4 is supplied in a 14-lead plastic dual-in-line package (PDIP) with 0.3-inch body width and 0.1-inch lead pitch, compliant with JEDEC MS-001 and MIL-STD-1835 GDIP1-T14 outlines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-input NAND logic applications.

Compared with CD4068BM and CD4068BF3A, the CD4068BEE4 balances commercial availability, through-hole robustness, and extended temperature performance - making it optimal for industrial upgrades and non-MIL production where hermetic sealing is unnecessary but mechanical reliability matters.

Availability

CD4068BEE4 is available at Aetrix Electronics and suitable for industrial sequencers, aerospace power-up controllers, and downhole tool signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD4068BEE4 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 for industrial, automotive, and aerospace markets.

The CD4068BEE4 belongs to TI's legacy 4000-series CMOS logic family, designed specifically for high-voltage, high-reliability digital control in environments where modern low-voltage logic cannot operate.

FAQ

What is the maximum operating frequency of the CD4068BEE4?

The CD4068BEE4 is not characterized for maximum toggle frequency in its datasheet. Its typical propagation delay is 90 ns at 5 V, implying usable operation up to approximately 5–6 MHz in non-critical combinatorial paths. For synchronous clocked systems, designers should apply derating based on worst-case delay, load capacitance, and supply voltage - the CD4068BEE4 is intended for static and low-speed sequencing, not high-frequency data paths.

Does the CD4068BEE4 have Schmitt-trigger inputs?

No, the CD4068BEE4 does not feature Schmitt-trigger inputs. Its input thresholds are standard CMOS levels (V_IH ≥ 0.7 V_DD, V_IL ≤ 0.3 V_DD) with no hysteresis. Slow-rising or noisy signals may cause multiple transitions; external RC filtering or a dedicated Schmitt-trigger buffer like CD40106B is required for such cases. This behavior is consistent across all CD4068B variants including the CD4068BEE4.

Can CD4068BEE4 drive TTL loads directly?

Yes, the CD4068BEE4 can directly drive standard TTL loads. At V_DD = 5 V, its output sink/source capability exceeds ±4 mA, satisfying the I_IL and I_IH requirements of 74LS and 74L series TTL inputs. However, when driving more than two 74LS inputs, verify voltage margins under worst-case V_DD and temperature - the CD4068BEE4 remains compatible but may require local decoupling to maintain edge integrity.

Is CD4068BEE4 RoHS compliant?

Yes, CD4068BEE4 is RoHS compliant and labeled "Green (RoHS & no Sb/Br)" per TI's Packaging Information Addendum. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and meets JS709B low-halogen requirements (<1000 ppm Br/Cl). The PDIP package uses NiPdAu lead finish and is exempt from MSL classification due to its through-hole construction.

What is the difference between CD4068BEE4 and CD4068BE?

The CD4068BEE4 and CD4068BE are functionally and electrically identical devices. The "E4" suffix denotes tape-and-reel packaging per TI's internal ordering convention (25 units per tube), whereas "E" indicates bulk packaging. Both share the same PDIP-14 package (drawing N), -55°C to +125°C rating, and green RoHS-compliant finish. No parametric or reliability differences exist between CD4068BEE4 and CD4068BE.