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Texas Instruments CD74HC174M
- Part No.:
- CD74HC174M
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC174M.pdf
- Description:
- IC FF D-TYPE SNGL 6BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,626
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Product details
Overview
CD74HC174M from Texas Instruments is a high-speed CMOS hex D-type flip-flop with asynchronous common reset, implemented in silicon-gate CMOS technology. It features positive-edge clock triggering, operates from 2V to 6V, delivers propagation delays as low as 28ns (at VCC = 6V, CL = 50pF), and supports industrial temperature range (–55°C to +125°C). It is used in synchronous logic control, data latching, and register staging in embedded timing circuits.
For engineers reviewing the CD74HC174M datasheet, CD74HC174M pinout, CD74HC174M application, or CD74HC174M equivalent, key selection criteria include its 6-bit edge-triggered storage capability, wide supply voltage range, guaranteed operation across extreme temperatures, and SOIC-16 package compatibility with automated assembly.
Technical Context
The CD74HC174M implements six master-slave D-type flip-flops sharing one clock (CP) and one asynchronous master reset (MR) input. Each flip-flop transfers data from Dn to Qn on the rising edge of CP, provided setup (tSU ≥ 10ns at 6V) and hold (tH ≥ 5ns) times are met.
Its HC logic family ensures CMOS-level input thresholds (VIH = 1.5V min at 2V, 4.2V min at 6V), low quiescent current (ICC ≤ 160µA over full temp range), and high noise immunity (NIL/NIH = 30% of VCC at 5V). Output drive capability is rated for 10 LSTTL loads under all operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), not TTL-compatible - requires CMOS-level input voltages |
| Supply Voltage Range | 2V to 6V - enables direct interface with 3.3V and 5V systems without level shifters |
| Propagation Delay (CP→Q) | 28ns max at VCC = 6V, CL = 50pF - supports clock frequencies up to 24MHz over full temperature range |
| Operating Temperature | –55°C to +125°C - qualified for aerospace, automotive under-hood, and industrial control environments |
| Output Drive | 10 LSTTL loads - sufficient to drive standard logic inputs without buffering in moderate fanout designs |
| Input Capacitance | 10pF - minimizes capacitive loading on driving stages and preserves signal integrity at high speed |
| Reset Behavior | Asynchronous active-low MR - forces all six Q outputs low independently of clock edge |
Pinout & Package
CD74HC174M is supplied in a 16-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm body width, with standard JEDEC MO-012AC footprint and gull-wing leads. Pin 1 is located at the top-left corner (quadrant Q1) when viewed from top with marking side up and notch/left index mark oriented left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Master Reset | Active-low asynchronous reset - pulls all Q outputs low regardless of clock state |
| 2 (D0) | Data Input 0 | Input for first flip-flop; sampled on rising CP edge if tSU/tH met |
| 3 (CP) | Clock Input | Positive-edge triggered - initiates synchronous transfer of all six D inputs to Q outputs |
| 4 (D1) | Data Input 1 | Input for second flip-flop; shares same CP and MR as other stages |
| 5 (D2) | Data Input 2 | Third D input; no internal gating - direct path to Q2 on clock edge |
| 6 (D3) | Data Input 3 | Fourth D input; independent of other D lines except shared control signals |
| 7 (GND) | Ground Reference | Primary return path for all I/O and internal circuitry; must be low-impedance |
| 8 (VCC) | Power Supply | CMOS supply rail (2–6V); bypassing with 0.1µF ceramic near pin recommended |
| 9 (Q0) | Output 0 | Inverted only by external logic - Q0 follows D0 after CP rise, subject to tPLH/tPHL delay |
| 10 (Q1) | Output 1 | Non-inverting output synchronized to CP; matches D1 state after propagation delay |
| 11 (Q2) | Output 2 | Direct replica of D2 at next active clock edge; no internal feedback or latch enable |
| 12 (Q3) | Output 3 | Stable Q3 reflects D3 sampled at previous CP edge; holds until next valid clock |
| 13 (D4) | Data Input 4 | Fifth D input; electrically identical to D0–D3 in timing and drive requirements |
| 14 (D5) | Data Input 5 | Sixth and final D input; completes full 6-bit parallel load capability |
| 15 (Q4) | Output 4 | Corresponding non-inverting output for D4; matches timing specs of Q0–Q3 |
| 16 (Q5) | Output 5 | Final output stage; provides full 6-bit registered output bus aligned to CP edge |
Key Features
| Feature | Design Value |
|---|---|
| Buffered positive-edge clock input | Reduces clock skew sensitivity and improves noise rejection on CP line |
| Common asynchronous master reset | Enables deterministic system initialization without requiring clock sequencing |
| Wide 2V–6V supply range | Supports mixed-voltage board designs and battery-powered operation down to 2V |
| –55°C to +125°C operating range | Validated for use in harsh environments including engine control units and avionics |
| Low power vs. LSTTL | Typical ICC = 8µA at 25°C (vs. ~15mA for LS174), reducing thermal load and supply demand |
| High noise immunity (30% VCC) | Ensures reliable operation in electrically noisy industrial settings without added filtering |
Applications
| Industrial PLC Register Staging | Automotive Sensor Data Capture |
|---|---|
|
Use Scenario: Capturing analog-to-digital converter (ADC) output words in programmable logic controllers before scan-cycle processing. IC Role / Device Role / Timing Role: Synchronizes 6-bit parallel sensor data into a deterministic time slot using system clock edge. Use Value: Eliminates metastability risk during ADC read cycles and enables cycle-accurate state capture across multiple I/O modules. |
Use Scenario: Latching wheel speed or throttle position signals prior to CAN message framing in ECU subsystems. IC Role / Device Role / Timing Role: Provides glitch-free, edge-aligned registration of critical vehicle dynamics inputs. Use Value: Ensures consistent sampling phase relative to main controller clock, improving diagnostic accuracy and closed-loop response. |
| Test Equipment Pattern Generation | Legacy Bus Interface Buffering |
|
Use Scenario: Generating repeatable digital stimulus patterns for IC functional testing using microcontroller-controlled sequencers. IC Role / Device Role / Timing Role: Holds pattern bits stable during test vector application, synchronized to tester clock. Use Value: Delivers sub-30ns timing precision required for high-speed digital test coverage without external timing compensation. |
Use Scenario: Interfacing modern microcontrollers with legacy 8-bit parallel buses (e.g., ISA, GPIB) requiring synchronous handshake. IC Role / Device Role / Timing Role: Registers control/status bits between mismatched clock domains (MCU vs. peripheral). Use Value: Resolves setup/hold violations caused by clock domain crossing, enabling reliable communication with older peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex D-type flip-flop with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC174N | Same logic function and pinout, but in PDIP-16 package; higher θJA (67°C/W vs. 73°C/W), lower max fMAX at temperature extremes | Preferred for prototyping or through-hole PCBs; unsuitable for high-density surface-mount layouts | Select SN74HC174N only when manual assembly or socket-based validation is required. |
| CD74HCT174M | LSTTL-input compatible (VIH = 2V min, VIL = 0.8V max); identical SOIC-16 package and pinout; slightly slower (tPLH = 40ns min at 4.5V) | Required when interfacing directly with 5V TTL or LS logic without level translation | Choose CD74HCT174M only when driving from legacy TTL outputs; otherwise CD74HC174M offers better noise margin and wider VCC range. |
Compared with SN74HC174N and CD74HCT174M, the CD74HC174M uniquely balances wide supply flexibility (2–6V), superior noise immunity, and SOIC-16 manufacturability - making it optimal for new 3.3V/5V mixed-signal designs where input compatibility with both CMOS and buffered TTL sources is not mandatory.
Availability
CD74HC174M is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC174M 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 heritage in high-reliability logic families.
The CD74HC174M belongs to TI's CD74HC high-speed CMOS logic series, designed for robust, low-power, wide-temperature digital interfacing and register staging in mission-critical systems.
FAQ
What is the maximum clock frequency supported by CD74HC174M across its full temperature range?
The CD74HC174M supports up to 24MHz maximum clock frequency when operated from –55°C to +125°C at VCC = 4.5V, and up to 20MHz at VCC = 4.5V over the same range per datasheet Section 5. This is derated from the 35MHz spec at 25°C due to increased propagation delay at temperature extremes. The CD74HC174M maintains functional timing compliance without external derating circuits.
Does CD74HC174M support 3.3V operation, and what are the input voltage thresholds at that supply?
Yes, CD74HC174M fully supports 3.3V operation as part of its 2V–6V supply range. At VCC = 3.3V, the minimum high-level input voltage (VIH) is 2.31V (70% of VCC), and the maximum low-level input voltage (VIL) is 0.99V (30% of VCC), per HC family noise margin specifications. These thresholds ensure reliable interfacing with standard 3.3V CMOS outputs.
Can CD74HC174M be used as a direct replacement for CD74HCT174M in an existing design?
No - CD74HC174M is not a direct replacement for CD74HCT174M because it uses CMOS input thresholds (VIH ≥ 1.5V at 2V, scaling with VCC), whereas CD74HCT174M accepts standard TTL input levels (VIH ≥ 2.0V, VIL ≤ 0.8V). Substituting CD74HC174M may cause logic errors when driven by unbuffered TTL outputs. Verify driver compatibility before substitution.
What is the meaning of the "M96E4" suffix in CD74HC174M96E4?
The "M96E4" suffix in CD74HC174M96E4 indicates a SOIC-16 packaged device (M), supplied in tape-and-reel format (96), with a reel quantity of 2500 units (E4 per TI packaging nomenclature). This ordering variant is optimized for automated SMT placement and qualifies for volume production use with full traceability and MSL Level-1 reflow profile compliance.
Is CD74HC174M pin-compatible with the obsolete SN54LS174J military-grade part?
No - while CD74HC174M and SN54LS174J share identical pin assignments and basic functionality (6-bit D flip-flop with MR), they are not electrically pin-compatible. SN54LS174J is TTL-based with different input thresholds, output drive strength, and power consumption. Direct replacement requires redesign of surrounding biasing, termination, and supply networks to match HC electrical characteristics.
CD74HC174M 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:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Clock Frequency:
- 35 MHz
- Max Propagation Delay @ V, Max CL:
- 28ns @ 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
CD74HC174M FAQ
1.How can I place an order for CD74HC174M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC174M 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 CD74HC174M reliable?
The price and inventory of CD74HC174M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC174M is usually 5 days.
3.What payment methods are accepted for CD74HC174M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC174M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC174M?
CD74HC174M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC174M 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 CD74HC174M?
For technical support, including CD74HC174M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC174M requirements.
6.How does Aetrix verify that CD74HC174M is sourced from the original manufacturer or authorized distributors?
All CD74HC174M 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 CD74HC174M meets industry standards.
7.What is the process for return or replacement of CD74HC174M?
All CD74HC174M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC174M, 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 CD74HC174M part is unused and in its original packaging.
Return procedure for CD74HC174M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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