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Texas Instruments CD74HC175M
- Part No.:
- CD74HC175M
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC175M.pdf
- Description:
- IC FF D-TYPE SNGL 4BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:345
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Product details
Overview
CD74HC175M 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 data latching and register design within industrial control logic.
For engineers reviewing the CD74HC175M datasheet, CD74HC175M pinout, CD74HC175M application, or CD74HC175M equivalent, this device is evaluated for edge-triggered sequential logic, low-power register storage, noise-immune digital state retention, and compatibility with LSTTL loads in extended-temperature embedded systems.
Technical Context
The CD74HC175M implements four independent D-type flip-flops sharing a common clock (CP) and active-low asynchronous master reset (MR), where data at each Dn input transfers to Qn on the rising edge of CP; MR forces all Qn to logic 0 and all Q̅n to logic 1 regardless of clock state.
It uses silicon-gate CMOS technology with buffered inputs, balanced propagation delay (e.g., 30 ns max at VCC = 6V, CL = 50 pF), and high noise immunity (NIL/NIH = 30% of VCC at 5V), enabling reliable operation in electrically noisy environments without external Schmitt triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), compatible with 2V–6V supply-enables direct interface with mixed-voltage systems including 3.3V and 5V domains. |
| Clock Edge Sensitivity | Positive-edge triggered-ensures deterministic state capture synchronized to rising transitions, critical for pipeline and register-file timing integrity. |
| Operating Temperature | -55°C to +125°C-supports deployment in aerospace, automotive under-hood, and industrial motor-control applications without derating. |
| Max Clock Frequency | 23 MHz at VCC = 6V, -55°C to +125°C-sufficient for medium-speed control sequencing and status sampling in real-time PLC modules. |
| Output Drive Capability | 10 LSTTL loads-allows direct fanout to legacy TTL logic without level-shifting buffers, reducing BOM count in hybrid logic designs. |
| Input Leakage Current | ±1 µA max over full temperature range-minimizes unintended bias current effects in high-impedance sample-and-hold or battery-backed state retention circuits. |
| Propagation Delay | 45 ns max (CP to Q, VCC = 6V, CL = 50 pF, -55°C to +125°C)-defines worst-case setup window for downstream combinational logic in synchronous finite-state machines. |
Pinout & Package
CD74HC175M is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, surface-mount compatible with standard reflow profiles (MSL Level-1, 260°C peak), footprint identical to industry-standard 16-pin SOIC (Package Drawing D).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Master Reset (active-low) | Asynchronous global reset: forces all Q outputs low and Q̅ outputs high independent of clock-essential for power-on initialization and fault recovery. |
| 2 (Q0) | Complementary Output 0 | Inverted output of first flip-flop; used with Q0 for differential signaling or dual-rail logic verification in safety-critical latches. |
| 3 (Q0) | True Output 0 | Primary registered output of first flip-flop; provides sampled D0 value on CP rising edge-core storage node for data path staging. |
| 4 (D0) | Data Input 0 | Input for first flip-flop; must be stable ≥14 ns before CP rising edge (tSU at VCC=6V) to avoid metastability in synchronous systems. |
| 5 (D1) | Data Input 1 | Input for second flip-flop; shares same timing constraints as D0-enables parallel loading of 4-bit words into register banks. |
| 6 (Q1) | True Output 1 | Registered output of second flip-flop; used in counter stages or shift-register segments where bit-parallel access is required. |
| 7 (Q1) | Complementary Output 1 | Inverted output of second flip-flop; supports dynamic logic, gated clocks, or XOR-based parity generation without external inverters. |
| 8 (GND) | Ground Reference | Power return path for all internal circuitry; requires low-inductance connection to minimize ground bounce during simultaneous output switching. |
| 9 (Q3) | True Output 3 | Output of fourth flip-flop; completes 4-bit register group-commonly used for status flags or address latching in microcontroller peripheral interfaces. |
| 10 (Q3) | Complementary Output 3 | Inverted output of fourth flip-flop; enables direct implementation of active-low enable signals or inverted bus drivers. |
| 11 (D3) | Data Input 3 | Input for fourth flip-flop; completes 4-bit parallel data interface-critical for latch-based ADC result capture or encoder position buffering. |
| 12 (D2) | Data Input 2 | Input for third flip-flop; symmetric with D0–D1–D3-ensures uniform timing across all four bits in register file implementations. |
| 13 (Q2) | True Output 2 | Output of third flip-flop; often used in modulo-16 counters or 4-bit shift registers where intermediate bit states drive feedback logic. |
| 14 (Q2) | Complementary Output 2 | Inverted output of third flip-flop; supports dual-rail encoding schemes or differential clock gating in low-power sequencers. |
| 15 (CP) | Common Clock Input | Edge-triggered global clock for all four flip-flops; requires clean, monotonic rising edge with <400 ns max rise time at VCC = 6V to meet timing specs. |
| 16 (VCC) | Positive Supply | CMOS core supply rail (2V–6V); decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin to suppress switching noise coupling into analog sections. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Master Reset | Single-pin global reset (MR) forces deterministic initial state across all four flip-flops-eliminates need for power-on reset sequencing logic in standalone register applications. |
| Complementary Outputs per Stage | Each flip-flop provides both Q and Q̅-reduces external inverter count in toggle-mode counters, Johnson counters, and differential bus drivers. |
| Wide Supply Range (2V–6V) | Operates across 3.3V and 5V systems without level shifters-enables reuse in legacy and modern designs, simplifying inventory management for multi-generation products. |
| High Noise Immunity | NIL/NIH = 30% of VCC at 5V-tolerates >1.5V of coupled noise on inputs, improving robustness in motor-drive or relay-switching environments without added filtering. |
| Low Quiescent Current | ICC ≤ 160 µA max over full temperature range-extends battery life in always-on monitoring nodes and reduces thermal load in dense logic arrays. |
Applications
| Industrial PLC Register Bank | Automotive Sensor Data Latch |
|---|---|
Use Scenario: Storing 4-bit status codes from discrete I/O modules in programmable logic controllers during scan-cycle updates. IC Role / Device Role / Timing Role: Quad D-type flip-flop acting as edge-triggered register bank, capturing parallel sensor states on system clock edge with guaranteed hold time compliance. Use Value: Eliminates need for discrete latches or microcontroller GPIO polling, reducing cycle time jitter and enabling deterministic 4-bit parallel data capture at up to 23 MHz. | Use Scenario: Capturing wheel speed sensor pulses in ABS control units where transient noise may corrupt raw signal edges. IC Role / Device Role / Timing Role: Synchronous data sampler with noise-immune inputs, holding sensor state for microcontroller readout during interrupt service routines. Use Value: High noise margin (30% VCC) prevents false triggering from EMI during braking events, ensuring accurate pulse counting even in high-noise under-hood environments. |
| Legacy TTL System Interface | 4-Bit Shift Register Stage |
Use Scenario: Interfacing modern microcontrollers to legacy 74LS-series logic in test equipment upgrades requiring backward compatibility. IC Role / Device Role / Timing Role: Level-translating register buffer providing 10-LSTTL-load drive capability while accepting LS-compatible input thresholds via HCT variants (not CD74HC175M, but contextually relevant). Use Value: Enables drop-in replacement of obsolete 74LS175 in existing PCBs when paired with proper VCC selection (5V), preserving layout and reducing redesign cost. | Use Scenario: Constructing a 16-bit serial-to-parallel shift register using four cascaded CD74HC175M devices in daisy-chain configuration. IC Role / Device Role / Timing Role: Four-bit parallel-output stage with shared clock and reset-synchronizes shifted data for display driver or DAC interface. Use Value: Complementary outputs allow direct driving of LED segment drivers or bidirectional bus transceivers without additional inverters, cutting component count by 4 per stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad D-type flip-flop with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74HCT175M | 5V-only operation (4.5V–5.5V); TTL-compatible input thresholds (VIH min = 2V, VIL max = 0.8V); identical pinout and function. | Better suited for pure 5V TTL/LSTTL systems where input noise immunity is less critical than voltage-level matching. | Select CD74HCT175M when interfacing directly to legacy 74LS logic without level shifters; CD74HC175M preferred for 3.3V/5V mixed-signal or wide-temp industrial use. |
| SN74HC175DR | Same HC logic family, identical electrical specs and pinout; TI's newer SOIC packaging (DR suffix), RoHS-compliant, active production status vs. CD74HC175M's obsolete status. | No functional difference; used interchangeably in new designs where long-term supply continuity is required. | Prefer SN74HC175DR for new designs due to active status and guaranteed availability; CD74HC175M remains viable for legacy repair or existing BOM continuity. |
Compared with CD74HCT175M, CD74HC175M offers wider voltage flexibility and higher noise immunity but lacks native TTL input compatibility; versus SN74HC175DR, it shares full functionality but carries obsolescence risk-making SN74HC175DR the recommended long-term alternative for new designs.
Availability
CD74HC175M is available at Aetrix Electronics and suitable for industrial control systems, automotive sensor interfaces, and legacy TTL system upgrades requiring stable component supply across extended temperature ranges.
Supply support for CD74HC175M 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 specializing in analog, embedded processing, and logic solutions, with decades of experience in high-reliability logic IC development.
The CD74HC175M belongs to TI's CD74HC high-speed CMOS logic family, designed for low-power, wide-temperature, noise-immune digital sequencing in industrial, aerospace, and automotive applications.
FAQ
What is the maximum clock frequency supported by CD74HC175M across its full operating temperature range?
The CD74HC175M supports a maximum clock frequency of 23 MHz at VCC = 6V over the full -55°C to +125°C range. At lower supply voltages (e.g., 4.5V), the max frequency drops to 20 MHz, and at 2V it is limited to 4 MHz-these values are specified in the Switching Specifications table and reflect worst-case timing under extreme thermal and voltage conditions.
Does CD74HC175M support 3.3V operation, and what are the key timing implications?
Yes, CD74HC175M fully supports 3.3V operation as part of its 2V–6V supply range. At 3.3V, typical propagation delay is ~40 ns (CL = 50 pF), setup time is ~20 ns, and clock frequency is rated up to ~18 MHz over temperature-enabling direct integration into 3.3V FPGA or microcontroller peripheral buses without level translation.
How does the asynchronous reset (MR) pin behave during power-up, and is an external pull-up required?
The MR pin is active-low and internally uncommitted; TI's datasheet specifies no internal pull-up. For reliable power-on reset, an external pull-up resistor (typically 10 kΩ to VCC) is required to hold MR high until system stabilization. Failure to do so may result in undefined Q outputs during startup, risking metastability in downstream logic.
Can CD74HC175M drive LEDs directly, and what current limitations apply?
CD74HC175M outputs are not designed for direct LED driving: its absolute max output sink/source current is ±25 mA per pin, but recommended DC output current is ±4 mA for reliable long-term operation. Driving LEDs requires series current-limiting resistors (e.g., 1 kΩ for ~3 mA at 5V) and thermal derating above 70°C-never exceed 20 mA continuous per output.
Is CD74HC175M pin-compatible with the older 74LS175, and what design changes are needed for replacement?
CD74HC175M is pin-compatible with 74LS175 in 16-pin PDIP/SOIC packages, sharing identical pin assignments for MR, CP, D0–D3, Q0–Q3, Q̅0–Q̅3, VCC, and GND. However, LS inputs require 5V only and draw higher current; HC outputs have higher impedance-so verify fanout, add decoupling, and confirm timing margins (e.g., longer setup times) when substituting CD74HC175M in legacy LS designs.
CD74HC175M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Clock Frequency:
- 35 MHz
- Max Propagation Delay @ V, Max CL:
- 30ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74HC175M FAQ
1.How can I place an order for CD74HC175M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC175M on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CD74HC175M reliable?
The price and inventory of CD74HC175M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC175M is usually 5 days.
3.What payment methods are accepted for CD74HC175M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC175M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC175M?
CD74HC175M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC175M order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CD74HC175M?
For technical support, including CD74HC175M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC175M requirements.
6.How does Aetrix verify that CD74HC175M is sourced from the original manufacturer or authorized distributors?
All CD74HC175M products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CD74HC175M meets industry standards.
7.What is the process for return or replacement of CD74HC175M?
All CD74HC175M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC175M, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CD74HC175M part is unused and in its original packaging.
Return procedure for CD74HC175M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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