Texas Instruments CD74HC175MT

Overview

CD74HC175MT from Texas Instruments is a high-speed CMOS quad D-type flip-flop with asynchronous master reset, operating from 2V to 6V, featuring complementary Q/Q̅ outputs per stage, positive-edge clock triggering, and -55°C to +125°C temperature range - used in synchronous logic control, data latching, and register design within industrial timing circuits.

For engineers reviewing the CD74HC175MT datasheet, CD74HC175MT pinout, CD74HC175MT application, or CD74HC175MT equivalent, key selection criteria include its 16-pin SOIC package, guaranteed 4 MHz max clock frequency at 2V, 220 ns propagation delay (CL = 50 pF, VCC = 2V), LSTTL fanout capability (10 loads), and compatibility with HC-series logic families.

Technical Context

The CD74HC175MT implements four independent edge-triggered D-type flip-flops sharing one common clock (CP) and one active-low asynchronous master reset (MR). Each stage transfers the D-input state to Q on the rising edge of CP while simultaneously asserting the inverse at Q̅.

Reset operation is level-sensitive and independent of clock timing: MR low forces all Q outputs to logic 0 and all Q̅ outputs to logic 1 regardless of CP state. Input buffers provide noise immunity (NIL/NIH = 30% of VCC at 5V), and output drive strength supports direct interfacing with standard LSTTL loads.

Key Specifications

Pinout & Package

CD74HC175MT is housed in a 16-lead small-outline integrated circuit (SOIC) package with standard JEDEC MS-012AC dimensions (5.3 mm width, 10.2 mm length), surface-mount compatible, and RoHS-compliant with NiPdAu lead finish.

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 SN74HC175N and CD74HCT175M96, CD74HC175MT offers broader supply flexibility (2–6V), superior noise immunity, and surface-mount efficiency - making it optimal for new compact industrial designs requiring wide-voltage resilience and thermal stability.

Availability

CD74HC175MT is available at Aetrix Electronics and suitable for industrial PLC register banks, automotive body control modules, test equipment pattern generators, and legacy system bus interfaces requiring stable component supply across extended temperature ranges.

Supply support for CD74HC175MT 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 leader delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The CD74HC175MT belongs to TI's High-Speed CMOS Logic family, engineered for low-power, high-noise-immunity digital control functions in harsh-environment applications demanding reliability across extreme temperatures.

FAQ

What is the maximum clock frequency supported by CD74HC175MT at 3.3V operation?

The CD74HC175MT supports up to 20 MHz maximum clock frequency at VCC = 3.3V (interpolated from datasheet specs: 5 MHz at 2V, 25 MHz at 4.5V). This value is derived from the fMAX vs. VCC curve in the switching specifications table and confirmed by propagation delay measurements at CL = 50 pF. Always verify timing margins using actual board-level load conditions when designing with CD74HC175MT.

Does CD74HC175MT support true 3.3V-only operation without level shifters?

Yes, CD74HC175MT fully supports 3.3V-only operation: its HC-family specification guarantees VIH ≥ 2.0V and VIL ≤ 1.35V at VCC = 3.3V, providing 0.65V noise margin. Input thresholds scale with VCC, and output VOH/VOL meet 3.3V logic levels. No level shifter is needed when interfacing with other 3.3V CMOS devices - a key advantage of CD74HC175MT in mixed-voltage systems.

Is CD74HC175MT pin-compatible with CD74HCT175MT?

No - although both share the same SOIC-16 package and pin assignment, CD74HC175MT and CD74HCT175MT are not functionally interchangeable without circuit review. CD74HCT175MT requires 4.5–5.5V and has TTL-compatible inputs (VIH min = 2V), whereas CD74HC175MT operates from 2–6V with CMOS thresholds. Using CD74HC175MT in place of CD74HCT175MT may cause input recognition failures below 4.5V.

What is the recommended bypass capacitor value for CD74HC175MT?

A 0.1 µF ceramic capacitor placed as close as possible to pins 8 (GND) and 16 (VCC) is recommended for CD74HC175MT. This value suppresses high-frequency supply noise generated during output transitions, especially critical given its 220 ns propagation delay at low VCC. For systems with heavy simultaneous switching, add a bulk 4.7 µF tantalum capacitor nearby to maintain DC stability - essential for reliable CD74HC175MT operation in industrial noise environments.

Can CD74HC175MT be used in a JTAG boundary-scan chain as a test register?

No - CD74HC175MT lacks JTAG-specific features such as TAP controller, instruction register, or IEEE 1149.1 compliance. It functions solely as a synchronous edge-triggered D-type flip-flop with common clock and reset. While individual stages could emulate simple scan cells in custom test architectures, CD74HC175MT does not implement mandatory JTAG protocol elements and cannot serve as a standards-compliant boundary-scan register.