Nexperia USA Inc. 74HCT175DB,118

Overview

74HCT175DB,118 from Nexperia is a quad positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), 16-pin SO16 package, TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), propagation delay of 19–50 ns (VCC = 4.5 V), and operation from -40 °C to +125 °C. It serves as a synchronous data latch in digital control logic, bus interface registers, and state machine sequencing.

For engineers reviewing the 74HCT175DB,118 datasheet, 74HCT175DB,118 pinout, 74HCT175DB,118 application, or 74HCT175DB,118 equivalent, key selection criteria include TTL-level input compatibility, guaranteed 25 MHz maximum clock frequency at VCC = 4.5 V, simultaneous asynchronous reset across all four flip-flops, and SO16 package thermal performance (Ptot = 500 mW at Tamb ≤ 110 °C).

Technical Context

This device implements four independent edge-triggered D latches sharing one common clock (CP) and one active-low master reset (MR). Each flip-flop samples its Dn input on the LOW-to-HIGH transition of CP and updates Qn/Qn outputs synchronously, with MR overriding clock action to force all Qn = LOW and Qn = HIGH regardless of CP or Dn state.

Input clamp diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The design supports mixed-logic systems via TTL-compatible inputs while delivering CMOS-level output drive (VOH ≥ 3.98 V at IO = –4.0 mA, VOL ≤ 0.26 V at IO = 5.2 mA).

Key Specifications

Pinout & Package

74HCT175DB,118 is supplied in SOT109-1 (SO16), a plastic small outline package with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or dot; pin numbering follows counter-clockwise convention from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC175D,653, the 74HCT175DB,118 offers seamless TTL interoperability but consumes more quiescent current; versus SN74LS175N, it delivers lower power, better noise immunity, and complementary outputs - making it the preferred upgrade path for industrial control and mixed-signal interface designs.

Availability

74HCT175DB,118 is available at Aetrix Electronics and suitable for industrial automation controllers, embedded instrumentation interfaces, and legacy bus expansion modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT175DB,118 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

Nexperia is a global semiconductor expert specializing in high-performance, energy-efficient logic, analog, and discrete components for industrial, automotive, and computing markets.

The 74HCT175 belongs to Nexperia's 74HCT logic family, engineered for reliable 5 V TTL-to-CMOS bridging in industrial control, test equipment, and legacy system upgrades where input compatibility and thermal robustness are essential.

FAQ

Can 74HCT175DB,118 operate at 3.3 V supply?

No. The 74HCT175DB,118 is specified only for VCC = 4.5–5.5 V per Table 5. At 3.3 V, input thresholds fall outside TTL compatibility (VIH minimum becomes unmet), and output drive degrades significantly - use 74LVC175 or 74AUP1G74 for 3.3 V operation instead.

What is the minimum pulse width required on the MR pin?

The minimum MR pulse width is 5 ns at VCC = 4.5 V (Table 7, tW). This ensures reliable reset assertion across the full operating temperature range. For robust designs, maintain ≥ 20 ns to accommodate PCB trace delays and signal integrity margins.

Does this device support hot insertion or live swapping?

No. The 74HCT175DB,118 lacks hot-swap protection circuitry such as power-up reset, Ioff, or bus-hold. Applying VCC while inputs are driven risks latch-up or excessive current flow. Power sequencing must follow GND → VCC → inputs to ensure safe operation.

How does the SO16 package affect thermal performance?

The SOT109-1 (SO16) package has a total power dissipation limit of 500 mW at Tamb ≤ 110 °C, derating linearly by 12.4 mW/K above that temperature. With typical ICC < 160 μA and output loading, self-heating remains negligible below 50 °C ambient - no heatsink required in standard PCB layouts.