Nexperia USA Inc. 74HCT175PW,118

Overview

74HCT175PW,118 from Nexperia is a quad positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), 16-pin TSSOP package, TTL-compatible inputs, and complementary Q/Q̅ outputs per stage. It operates from 4.5 V to 5.5 V across –40 °C to +125 °C, delivering 19 ns typical propagation delay (CP to Q) at VCC = 4.5 V and CL = 50 pF, and is used in synchronous data latching, register banks, and clock-domain synchronization in industrial control logic.

For engineers reviewing the 74HCT175PW,118 datasheet, 74HCT175PW,118 pinout, 74HCT175PW,118 application, or 74HCT175PW,118 equivalent, key selection criteria include TTL-level input compatibility, guaranteed 17 MHz minimum fmax at 125 °C, MR-to-Q timing under 38 ns, output drive capability of ±4 mA, and compliance with JEDEC standard no. 7A for interoperability in legacy 5 V digital systems.

Technical Context

This device implements four independent edge-triggered D flip-flops sharing one common clock (CP) and one active-low asynchronous master reset (MR). Each stage accepts a dedicated Dn input and produces true (Qn) and complementary (Q̅n) outputs, enabling simultaneous data capture and inversion without external gates.

Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure direct interfacing with legacy 5 V logic families, while the internal clamping diodes allow safe operation with current-limiting resistors when interfacing to voltages exceeding VCC.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16 leads, body width 4.4 mm, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT175N and 74HCT175D, the 74HCT175PW,118 offers superior PCB area efficiency (4.4 mm × 5.0 mm footprint), tighter timing consistency due to reduced parasitic inductance in TSSOP, and full RoHS/lead-free compliance - making it optimal for high-density industrial control modules requiring long-term supply stability.

Availability

74HCT175PW,118 is available at Aetrix Electronics and suitable for industrial PLCs, automated test equipment, and legacy 5 V bus interface designs requiring stable component supply, extended temperature operation, and long-lifecycle support.

Supply support for 74HCT175PW,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 focused on high-volume, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74HCT logic family was designed specifically to bridge TTL and CMOS systems, providing pin- and function-compatible replacements for legacy 74LS devices while delivering CMOS power efficiency and noise immunity.

FAQ

What is the maximum clock frequency supported by the 74HCT175PW,118 over its full temperature range?

The 74HCT175PW,118 guarantees a minimum clock frequency of 17 MHz at –40 °C to +125 °C (VCC = 4.5 V, CL = 50 pF), based on worst-case propagation delay (50 ns) and setup/hold timing margins. At 25 °C and VCC = 4.5 V, typical operation reaches 49 MHz, but system-level derating for temperature, voltage, and load must be applied for robust design.

Can the 74HCT175PW,118 operate reliably at 4.2 V supply voltage?

No - the 74HCT175PW,118 is specified only for 4.5 V to 5.5 V operation. At 4.2 V, VIH minimum (2.0 V) remains met, but VOL and VOH parameters degrade beyond specification limits, and timing margins collapse: tpd increases by ~35 % and fmax drops below 10 MHz. Operation below 4.5 V violates recommended conditions and voids parametric guarantees.

Does the master reset (MR) pin require a pull-up resistor in normal operation?

Yes - MR is active-low and internally unconnected (no weak pull-up). A 10 kΩ pull-up to VCC is recommended to ensure defined HIGH state during power-up and prevent spurious resets. Without it, floating MR may cause unpredictable initialization or intermittent latch clearing due to noise coupling.

Are the Q and Q̅ outputs truly complementary under all load conditions?

Yes - Q and Q̅ are internally generated as strict logical complements. However, output skew (tPHL vs. tPLH mismatch) up to 3 ns occurs under asymmetric loads (e.g., Q driving 15 pF, Q̅ driving 50 pF). For critical differential applications, match trace lengths and capacitive loading on both outputs to maintain <1 ns effective skew.