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STMicroelectronics M74HC74RM13TR
- Part No.:
- M74HC74RM13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M74HC74RM13TR.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,489
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Product details
Overview
M74HC74RM13TR from STMicroelectronics is a high-speed CMOS dual D-type flip-flop with independent asynchronous preset and clear, operating across 2V–6V supply, delivering tPLH/tPHL ≤26 ns (typ.) at VCC = 6V, fMAX = 67 MHz (typ.), and symmetrical 4 mA output drive - deployed in clock-synchronized data latching and edge-triggered state control within industrial PLC I/O modules.
For engineers reviewing the M74HC74RM13TR datasheet, M74HC74RM13TR pinout, M74HC74RM13TR application, or M74HC74RM13TR equivalent, key selection criteria include asynchronous set/reset timing margins, propagation delay matching between Q/Q̅ outputs, noise immunity (VNIH/VNIL ≥28% VCC), and TSSOP-14 thermal performance under continuous 125°C operation.
Technical Context
The M74HC74RM13TR implements two independent edge-triggered D flip-flops using silicon gate C2MOS technology, each with separate low-active asynchronous PRESET (1PR/2PR) and CLEAR (1CLR/2CLR) inputs that override clock and data. Its positive-edge clocking (1CK/2CK) ensures deterministic state capture on rising transitions only.
DC input thresholds are rail-proportional (VIH = 0.7×VCC, VIL = 0.3×VCC), enabling robust interfacing with mixed-voltage logic families. Output drive strength is symmetric (|IOH| = IOL = 4 mA min), and propagation delays are balanced (tPLH ≅ tPHL) to minimize skew in complementary output pairs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 2 V to 6 V - supports direct interface with 3.3 V and 5 V logic systems without level shifters |
| fMAX (Typ.) | 67 MHz at VCC = 6 V - enables reliable operation in high-speed digital control loops up to 15 ns clock period |
| tPLH / tPHL (Max) | 38 ns at VCC = 6 V, TA = –55°C to +125°C - guarantees worst-case setup/hold timing margin in extended temperature environments |
| IOH / IOL (Min) | 4 mA - drives standard TTL loads or multiple 74HC inputs while maintaining VOH ≥4.18 V / VOL ≤0.26 V |
| VNIH / VNIL (Min) | 28 % VCC - provides ≥1.68 V noise margin at 6 V supply, rejecting common-mode transients on control lines |
| ICC (Max) | 40 µA at TA = –55°C to +125°C - enables ultra-low static power in battery-backed or energy-constrained monitoring nodes |
| ts / th (Min) | 3 ns setup / 0 ns hold at VCC = 6 V - simplifies PCB routing by eliminating external delay compensation for D-to-CK timing |
Pinout & Package
TSSOP-14 package: 4.9 mm × 6.4 mm body, 0.65 mm pitch, 1.2 mm height, lead-free, RoHS-compliant, optimized for automated SMT assembly and thermal dissipation in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | 1CLR, 2CLR | Asynchronous active-low reset - forces Q = 0, Q̅ = 1 regardless of clock or D state; requires pull-up for noise immunity |
| 2, 12 | 1D, 2D | Data input - sampled on rising clock edge; must be stable ≥3 ns before CK (ts) and ≥0 ns after CK (th) |
| 3, 11 | 1CK, 2CK | Positive-edge clock - triggers synchronous latch action; minimum pulse width 6 ns at VCC = 6 V |
| 4, 10 | 1PR, 2PR | Asynchronous active-low preset - forces Q = 1, Q̅ = 0 independently of clock or D; overrides CLR when both asserted |
| 5, 9 | 1Q, 2Q | True output - reflects stored D value after clock edge; drives downstream logic or status indicators |
| 6, 8 | 1Q̅, 2Q̅ | Inverted output - complements Q; used for differential signaling, toggle feedback, or dual-rail control paths |
| 7 | GND | Ground reference - dedicated return path for all internal logic and output currents; must be low-impedance |
| 14 | VCC | Positive supply - powers all gates and output drivers; bypass capacitor (100 nF) required within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Set/Clear Independence | PRESET and CLEAR operate without clock dependency, enabling immediate state initialization or fault recovery in safety-critical sequences |
| Symmetrical Output Drive | Matched |IOH| and IOL ensure equal rise/fall times and minimal duty-cycle distortion in clock distribution networks |
| Rail-Proportional Input Thresholds | VIH/VIL scale with VCC, allowing seamless interoperability across 2.0 V, 3.3 V, and 5.0 V logic domains without external biasing |
| Low Dynamic Power Consumption | CPD = 34 pF enables <1 mW average power at 10 MHz clock rate and 5 V supply - critical for thermally constrained enclosures |
| Extended Temperature Operation | Specified from –55°C to +125°C - qualified for under-hood automotive sensors and industrial motor drive control boards |
Applications
| Industrial Motion Control | Automotive Body Controller |
|---|---|
Use Scenario: Latching encoder position pulses and synchronizing servo enable signals in multi-axis CNC drives. IC Role / Device Role / Timing Role: Dual D flip-flop captures quadrature A/B edges on rising clock, while asynchronous clear resets position counter on homing command. Use Value: 38 ns max propagation delay ensures sub-microsecond response to emergency stop commands, meeting SIL-2 timing constraints. | Use Scenario: Managing door lock actuator sequencing and mirror fold/unfold timing in centralized body electronics modules. IC Role / Device Role / Timing Role: One section latches window UP/DOWN commands; second section generates debounced, glitch-free enable pulses for H-bridge drivers. Use Value: Rail-proportional VIH/VIL allows direct connection to 3.3 V microcontroller GPIOs without level translators, reducing BOM count. |
| Medical Infusion Pump Logic | Smart Energy Meter Interface |
Use Scenario: Isolating and synchronizing push-button inputs and alarm trigger signals in Class II medical devices. IC Role / Device Role / Timing Role: Asynchronous preset initiates safe default state (motor off, valves closed) during power-on reset or watchdog timeout. Use Value: 40 µA max ICC at 125°C supports fanless enclosure design with no thermal derating up to maximum ambient rating. | Use Scenario: Capturing tamper-detection switch closures and synchronizing pulse-output metering signals to MCU sampling clocks. IC Role / Device Role / Timing Role: Dual flip-flop debounces mechanical contacts and aligns kWh pulse edges to precise 1-second intervals for firmware timestamping. Use Value: 28% VCC noise immunity rejects EFT bursts per IEC 61000-4-4 Level 3, ensuring reliable counting in noisy utility substations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC74DR | SOIC-14 package; 35 ns max tPLH at 6 V; ICC = 40 µA same spec; identical AC/DC parameters | Larger footprint and lower thermal conductivity than TSSOP-14; unsuitable for space-constrained metering PCBs | Select when legacy SOIC layout reuse or hand-soldering prototyping is required |
| 74LVC74ABQ | 3.3 V only (1.65–3.6 V); 2.5 ns faster tPLH (35 ns → 32.5 ns); higher IOL = 24 mA; different pinout (no shared VCC/GND) | Not compatible with 5 V systems; requires level-shifting if interfacing with legacy 5 V peripherals | Select only in new 3.3 V-only designs requiring higher drive strength and tighter timing budgets |
Compared with SN74HC74DR and 74LVC74ABQ, M74HC74RM13TR uniquely balances wide 2–6 V operation, TSSOP-14 thermal efficiency, and full 74-series functional compatibility - making it optimal for mixed-voltage industrial upgrades where board area and temperature range are primary constraints.
Availability
M74HC74RM13TR is available at Aetrix Electronics and suitable for industrial motion control, automotive body electronics, medical infusion pump logic, and smart energy meter interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HC74RM13TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The M74HC74 belongs to ST's high-speed CMOS logic family, engineered for drop-in replacement of legacy 74LS devices while delivering lower power, wider voltage range, and enhanced noise immunity in real-time control subsystems.
FAQ
Can M74HC74RM13TR operate reliably at 2.0 V supply?
Yes. The device is fully specified down to 2.0 V: fMAX = 6.2 MHz (min), tPLH/tPHL ≤225 ns, and VIH/VIL thresholds scale to 1.5 V / 0.5 V. It maintains functional integrity in battery-powered systems during brown-out conditions, provided load capacitance remains ≤50 pF and clock rise time stays within 1000 ns.
What is the recommended decoupling for M74HC74RM13TR in TSSOP-14?
A 100 nF X7R ceramic capacitor placed within 3 mm of pins 7 (GND) and 14 (VCC) is mandatory. For systems with >10 MHz clock activity or adjacent switching regulators, add a 1 µF tantalum in parallel. Avoid shared vias between GND and VCC traces to prevent ground bounce-induced metastability.
How does asynchronous clear interact with clock and data inputs?
When 1CLR or 2CLR is pulled low, Q immediately goes to 0 and Q̅ to 1 - overriding any concurrent D value or clock edge. This action occurs independently of clock timing and requires no setup/hold window. Release of CLR restores normal clocked operation on the next rising edge, provided D is stable.
Is M74HC74RM13TR pin-compatible with older 74HC74 variants in TSSOP?
Yes. M74HC74RM13TR uses the industry-standard TSSOP-14 footprint (JEDEC MO-153) with 0.65 mm pitch and identical pin numbering as M74HC74TTR and 74HC74PW. Mechanical dimensions, solder paste stencil recommendations, and reflow profiles match ST's published TSSOP14 specifications without modification.
M74HC74RM13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 67 MHz
- Max Propagation Delay @ V, Max CL:
- 26ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 2 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
M74HC74RM13TR FAQ
1.How can I place an order for M74HC74RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC74RM13TR 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 M74HC74RM13TR reliable?
The price and inventory of M74HC74RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC74RM13TR is usually 5 days.
3.What payment methods are accepted for M74HC74RM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC74RM13TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC74RM13TR?
M74HC74RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC74RM13TR 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 M74HC74RM13TR?
For technical support, including M74HC74RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC74RM13TR requirements.
6.How does Aetrix verify that M74HC74RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HC74RM13TR 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 M74HC74RM13TR meets industry standards.
7.What is the process for return or replacement of M74HC74RM13TR?
All M74HC74RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC74RM13TR, 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 M74HC74RM13TR part is unused and in its original packaging.
Return procedure for M74HC74RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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