Texas Instruments CD40174BEE4

Overview

CD40174BEE4 from Texas Instruments is a hex D-type flip-flop IC with common clock and reset, implemented in CMOS technology for low-power operation. It features 6 independent edge-triggered D flip-flops, operates over -55°C to +125°C, supports supply voltages from 3V to 18V, and uses standard 16-pin PDIP packaging. It is used in digital logic control, data latching, and synchronous register applications.

For engineers reviewing the CD40174BEE4 datasheet, CD40174BEE4 pinout, CD40174BEE4 application, or CD40174BEE4 equivalent, key selection considerations include its wide V_DD range (3–18 V), TTL/CMOS compatibility, single positive-edge clock input, asynchronous master reset, and industrial temperature rating.

Technical Context

The CD40174BEE4 implements six identical D-type flip-flops sharing one common clock (CP) and one common asynchronous reset (MR) signal. Each stage samples the D input on the rising edge of CP and updates Q output synchronously.

All inputs are buffered with Schmitt-trigger action on MR and CP to improve noise immunity. The device exhibits typical propagation delays of 100 ns at 5 V and 50 ns at 15 V, with static current draw below 1 µA across the full temperature range.

Key Specifications

Pinout & Package

CD40174BEE4 is housed in a 16-lead plastic dual-in-line package (PDIP-N), with 0.3-inch body width and standard through-hole mounting. Pin 1 is located at the left end of the top row, identified by a notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HC174M and MC14174BCP, the CD40174BEE4 uniquely balances wide supply range, extended temperature capability, and active production status-making it the preferred choice for industrial, aerospace, and legacy-system upgrade designs requiring reliability and longevity.

Availability

CD40174BEE4 is available at Aetrix Electronics and suitable for industrial control logic, digital instrumentation, and legacy system interface applications requiring stable component supply and long-term lifecycle assurance.

Supply support for CD40174BEE4 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 across industrial, automotive, and personal electronics markets.

The CD40174B series belongs to TI's legacy CMOS logic portfolio, designed specifically for robust, low-power digital control functions in environments demanding wide voltage tolerance and extended temperature operation.

FAQ

What is the maximum clock frequency supported by the CD40174BEE4?

The CD40174BEE4 does not specify a maximum clock frequency in its datasheet; instead, timing is defined by minimum pulse widths and propagation delays. At V_DD = 15 V, t_PLH/t_PHL is typically 50 ns, supporting reliable operation up to approximately 10 MHz in well-designed layouts. For guaranteed timing, designers must meet t_W(CP) ≥ 30 ns and t_su/t_h ≥ 20 ns per the CD40174BEE4 datasheet.

Does the CD40174BEE4 support 3.3 V logic levels?

Yes, the CD40174BEE4 operates down to 3 V, but its output high voltage (V_OH) at 3.3 V supply is typically ≥ 2.97 V, meeting 3.3 V TTL thresholds. However, input thresholds scale with V_DD, so 3.3 V CMOS-compatible driving is ensured only if source logic meets CD40174BEE4's V_IH ≥ 0.7×V_DD requirement.

Is the CD40174BEE4 pin-compatible with the CD40175B?

No, the CD40174BEE4 is not pin-compatible with the CD40175B. While both are hex D flip-flops, the CD40175B has separate Q and Q̅ outputs per stage (12 total outputs), whereas the CD40174BEE4 provides only Q outputs (6 total), resulting in different pin assignments and incompatible pinouts.

What is the purpose of the Schmitt-trigger inputs on CP and MR in the CD40174BEE4?

The Schmitt-trigger inputs on CP and MR provide hysteresis (typically 1.5 V at 5 V supply), enabling clean edge detection on slow-rising or electrically noisy signals. This prevents multiple clocking or spurious resets in industrial environments where switch bounce or EMI may degrade signal integrity - a key reliability feature of the CD40174BEE4.

Can the CD40174BEE4 be used in battery-powered applications?

Yes, the CD40174BEE4 is well-suited for battery-powered applications due to its ultra-low quiescent current (typically < 1 µA at 25°C) and ability to operate from 3 V - matching common lithium coin-cell or two-AA battery configurations. Its wide V_DD range also accommodates gradual battery discharge without functional interruption.