Texas Instruments CD40174BPWR

Overview

CD40174BPWR from Texas Instruments is a hex D-type flip-flop IC in a 16-pin TSSOP package, operating over -55°C to +125°C, with supply voltage range 3V–18V, propagation delay ≤120 ns at 5V, and static current ≤1 µA. It serves as a synchronous data latch in digital control logic, timing sequencers, and register-based state machines.

For engineers reviewing the CD40174BPWR datasheet, CD40174BPWR pinout, CD40174BPWR application, or CD40174BPWR equivalent, key selection factors include its wide V_DD range, CMOS-level input compatibility, master-reset functionality, and TSSOP-16 thermal and layout advantages for space-constrained industrial control boards.

Technical Context

The CD40174BPWR implements six independent edge-triggered D flip-flops sharing a common clock (CLK) and master reset (MR) input. Each stage features complementary Q and Q̅ outputs, enabling direct register storage without external inverters.

It uses standard CMOS silicon-gate technology with buffered inputs, ensuring noise immunity and rail-to-rail output swing. The device is fully compatible with CD4000B-series logic families and supports both positive-edge clocking and asynchronous active-low reset.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.

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 MC140174BCP, the CD40174BPWR uniquely balances wide supply range, extended temperature capability, and modern TSSOP packaging-making it optimal for new industrial designs requiring field reliability and long-term component availability.

Availability

CD40174BPWR is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD40174BPWR 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic ICs, with leadership in industrial, automotive, and power management solutions.

The CD4000B series-including CD40174BPWR-is designed for robust, low-power digital logic in harsh environments, emphasizing wide voltage operation, radiation tolerance, and long-term manufacturability.

FAQ

What is the maximum clock frequency supported by the CD40174BPWR?

The CD40174BPWR does not specify a maximum clock frequency in its datasheet; instead, it specifies propagation delay (t_PD) ≤120 ns at V_DD = 5V. This implies reliable operation up to approximately 3 MHz in typical synchronous logic configurations. For higher-frequency use, designers should verify setup/hold timing margins using actual board-level signal integrity measurements. The CD40174BPWR remains functional at lower frequencies down to DC, supporting static register applications.

Does the CD40174BPWR have Schmitt-trigger inputs?

No, the CD40174BPWR does not feature Schmitt-trigger inputs. Its inputs follow standard CMOS threshold behavior (V_IL ≤ 0.3×V_DD, V_IH ≥ 0.7×V_DD). This means it requires clean, monotonic input transitions to avoid metastability. If noisy signals are present, external RC filtering or a dedicated Schmitt-trigger buffer (e.g., CD40106B) must be used before connecting to CD40174BPWR inputs.

Can the CD40174BPWR operate from a 3.3V supply?

Yes, the CD40174BPWR is fully specified to operate from 3V to 18V, including 3.3V nominal supplies. At V_DD = 3.3V, its output high level is ≥2.97V and output low level is ≤0.33V, ensuring compatibility with 3.3V logic families. Propagation delay increases to ~220 ns, which remains adequate for most control and sequencing applications below 2 MHz.

Is there an exposed thermal pad on the CD40174BPWR package?

No, the CD40174BPWR in TSSOP-16 (PW) package does not include an exposed thermal pad. Its thermal performance relies solely on conduction through leads and PCB copper. The package's maximum junction temperature is 150°C, and typical power dissipation remains below 10 mW under normal operation-making forced cooling unnecessary in standard industrial layouts.

How does the master reset (MR) pin behave during power-up?

The MR pin on the CD40174BPWR is active-low and asynchronous. During power-up, if MR is held high (V_DD), outputs retain their previous state until the first valid clock edge. To ensure deterministic initialization, MR should be asserted low (via RC network or supervisor IC) for ≥100 ns after V_DD stabilizes above 3V. This guarantees all six flip-flops reset before first clock arrival-critical for CD40174BPWR use in safety-critical sequencers.