Texas Instruments CD40174BEG4

Overview

CD40174BEG4 from Texas Instruments is a hex D-type flip-flop IC with common clock and reset, operating across -55°C to +125°C, featuring 16-pin PDIP (N) package, 15 V max supply voltage, and CMOS logic compatibility. It serves as a synchronous data latch in digital control registers, microcontroller I/O expansion, and address/data buffering circuits.

For engineers reviewing the CD40174BEG4 datasheet, CD40174BEG4 pinout, CD40174BEG4 application, or CD40174BEG4 equivalent, key selection criteria include its single-clock edge-triggered operation, independent Q/Q̅ outputs per stage, rail-to-rail input voltage tolerance, and compatibility with legacy 4000-series logic families.

Technical Context

The CD40174BEG4 implements six independent D-type latches sharing one master clock and one asynchronous reset line, with all inputs and outputs fully buffered for noise immunity. Its CMOS architecture ensures static operation, low power consumption (<1 µA at 5 V), and high noise margin (≥45% of V_DD).

It operates over a wide supply range (3 V to 15 V DC), supports both positive-edge clocking and active-low asynchronous reset, and maintains full functionality across military-grade temperature extremes (-55°C to +125°C), making it suitable for industrial and aerospace systems requiring long-term reliability without refresh cycles.

Key Specifications

Pinout & Package

CD40174BEG4 is supplied in a 16-lead plastic dual-in-line package (PDIP-N), 19.1 mm × 6.6 mm body size, 2.54 mm lead pitch, with pin 1 marked by a notch or dot. The package is RoHS-compliant, lead-finished with NiPdAu, and rated for through-hole reflow or wave soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex D-type latch applications.

Compared with CD40174BEG4, CD40174BM96 reduces footprint by 65% and enables higher assembly density, while CD40174BNSR improves thermal resistance by 12°C/W-both retain identical functional behavior and timing margins for drop-in logic replacement in existing designs.

Availability

CD40174BEG4 is available at Aetrix Electronics and suitable for industrial automation, aerospace telemetry, and legacy system repair requiring stable component supply and long-lifecycle support.

Supply support for CD40174BEG4 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 CD4000B logic family was designed for high-reliability, wide-temperature, low-power digital control in mission-critical systems where latch stability and voltage flexibility outweigh speed requirements.

FAQ

What is the maximum clock frequency supported by the CD40174BEG4?

The CD40174BEG4 does not specify a maximum clock frequency in its datasheet because its operation is defined by minimum pulse width and propagation delay rather than a sustained toggle rate. At 5 V supply, the minimum clock pulse width is 60 ns and propagation delay is 120 ns, allowing reliable operation up to approximately 4 MHz in typical conditions. For precise timing analysis in your CD40174BEG4 design, refer to the setup/hold time and pulse-width specifications in Section 6.2 of the TI SCHS104C datasheet.

Does the CD40174BEG4 have Schmitt-trigger inputs?

No, the CD40174BEG4 does not feature Schmitt-trigger inputs. Its data and clock inputs use standard CMOS threshold detection with V_IL ≤ 1.5 V and V_IH ≥ 3.5 V at 5 V supply. This means it requires clean, monotonic input transitions to avoid multiple triggering. If noisy signals are present in your CD40174BEG4 application, external RC filtering or a dedicated Schmitt-trigger buffer (e.g., CD40106B) should be added before the CLK or D inputs.

Can the CD40174BEG4 operate at 3.3 V supply voltage?

Yes, the CD40174BEG4 is fully specified to operate at 3.3 V, as confirmed by its 3 V to 15 V supply range and characterization data in the TI SCHS104C datasheet. At 3.3 V, output drive capability decreases to ±1.8 mA, and propagation delay increases to 220 ns max, but all logic thresholds and timing parameters remain guaranteed. This makes CD40174BEG4 compatible with mixed-voltage 3.3 V/5 V systems when interfacing with appropriate level translators.

Is the CD40174BEG4 pin-compatible with the CD40175B?

No, the CD40174BEG4 is not pin-compatible with the CD40175B. While both are hex D-type devices, CD40175B uses separate clock and reset pins for each latch pair (three independent clocks/resets), whereas CD40174BEG4 has one global clock and one global reset. Their pinouts differ significantly: CD40174BEG4 places MR on pin 7 and CLK on pin 15, while CD40175B assigns clocks to pins 3, 6, and 13 and resets to pins 4, 7, and 14 - direct substitution would cause functional failure in any CD40174BEG4 circuit.

What is the meaning of the "G4" suffix in CD40174BEG4?

Within Texas Instruments' packaging nomenclature, the "G4" suffix in CD40174BEG4 indicates a RoHS-compliant, green (halogen-free), lead-finished version of the standard CD40174BE part in PDIP package. It replaces older lead-based finishes with NiPdAu plating and meets JEDEC J-STD-609A Class 1 moisture sensitivity requirements. The core logic, timing, and electrical behavior of CD40174BEG4 are identical to CD40174BE - only the finish and environmental compliance differ.