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STMicroelectronics M74HCT74RM13TR
- Part No.:
- M74HCT74RM13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M74HCT74RM13TR.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,935
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Product details
Overview
M74HCT74RM13TR from STMicroelectronics is a high-speed CMOS dual D-type flip-flop with asynchronous preset and clear, fabricated in silicon gate C2MOS technology. It operates at up to 48 MHz (typ.) at VCC = 4.5 V, delivers symmetrical output drive (±4 mA), and features balanced propagation delays (tPLH ≅ tPHL). It directly interfaces TTL and NMOS logic in clocked data storage applications such as shift registers and state machines.
For engineers reviewing the M74HCT74RM13TR datasheet, M74HCT74RM13TR pinout, M74HCT74RM13TR application, or M74HCT74RM13TR equivalent, key selection criteria include guaranteed 4.5–5.5 V operation, ±4 mA output drive capability, 21 ns typical CLOCK-to-Q propagation delay, and TSSOP-14 package compatibility with surface-mount industrial control PCBs.
Technical Context
The device implements two independent edge-triggered D flip-flops, each with asynchronous active-low preset (PR) and clear (CLR) inputs that override clock and data. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) ensure TTL-compatible interfacing without level shifting.
Propagation delays are tightly matched (tPLH/tPHL ≤ 50 ns max over temperature), and output impedance symmetry (|IOH| = IOL ≥ 4 mA) supports clean signal integrity in bidirectional bus loading scenarios. The design includes integrated ESD protection on all inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard 5 V supply rails with ±5% tolerance. |
| fMAX | 48 MHz (typ.) at VCC = 4.5 V - Supports high-speed synchronous logic in data path and timing-critical control circuits. |
| tPLH / tPHL | 21 ns / 21 ns (typ.) - Enables precise setup/hold timing in 25 MHz+ clock domains with minimal skew. |
| IOL / IOH | 4 mA (min.) - Drives standard TTL loads (e.g., 74LS inputs) without external buffers. |
| ICC (quiescent) | 2 µA (max.) at TA = 25°C - Minimizes standby power in battery-backed or low-power embedded systems. |
| VIH / VIL | 2.0 V (min.) / 0.8 V (max.) - Guarantees reliable logic-level recognition when driven by legacy TTL outputs. |
| ts / th | 7 ns / 0 ns - Allows tight data-to-clock alignment; zero hold time simplifies timing margining. |
Pinout & Package
TSSOP-14 (Thin Shrink Small Outline Package), 4.9 × 6.4 mm body, 0.65 mm pitch, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | 1CLR, 2CLR | Asynchronous active-low reset - Forces Q = L, Q̅ = H independently of clock; critical for system initialization. |
| 2, 12 | 1D, 2D | Data input - Captures logic state on rising clock edge; determines next-state value for associated flip-flop. |
| 3, 11 | 1CK, 2CK | Clock input - Edge-triggered (LOW-to-HIGH); synchronizes data transfer and enables deterministic state updates. |
| 4, 10 | 1PR, 2PR | Asynchronous active-low set - Forces Q = H, Q̅ = L; used for known-state startup or fault recovery. |
| 5, 9 | 1Q, 2Q | True output - Provides registered data; drives downstream logic or status indicators with TTL-compatible voltage levels. |
| 6, 8 | 1Q̅, 2Q̅ | Inverted output - Supplies complementary signal for differential latching, toggle functions, or enable/disable control. |
| 7 | GND | Ground reference - Return path for all internal currents; must be low-impedance to maintain noise immunity. |
| 14 | VCC | Positive supply - Powers internal logic and output drivers; requires local 0.1 µF decoupling per device. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - Eliminates need for level translators when interfacing with 74LS/ALS families. |
| Symmetrical output drive | |IOH| = IOL ≥ 4 mA - Ensures equal rise/fall times and consistent fanout across logic families. |
| Balanced propagation delays | tPLH ≅ tPHL - Reduces clock-to-output skew in dual-channel applications like dual-edge sampling. |
| Asynchronous preset/clear | Independent PR/CLR per flip-flop - Enables individual channel reset without affecting the other, supporting modular state machine design. |
| ESD-protected inputs | ±20 mA diode current rating - Withstands handling and board-level transients per IEC 61000-4-2 Level 2. |
Applications
| Industrial PLC Input Latching | Digital Panel Meter Data Capture |
|---|---|
Use Scenario: Capturing momentary sensor or switch inputs in noisy factory environments where contact bounce and EMI are present. IC Role / Device Role / Timing Role: Dual D flip-flop acts as synchronized debouncer and register, using clocked sampling to reject glitches shorter than tW(H). Use Value: Prevents spurious state changes in ladder logic execution; eliminates need for RC + Schmitt trigger hardware. | Use Scenario: Holding ADC conversion results for display update while new samples are acquired. IC Role / Device Role / Timing Role: Stores 2× 8-bit parallel data words (via dual channels) on shared microcontroller bus during read-modify-write cycles. Use Value: Enables non-blocking display refresh with atomic data transfer; avoids visual flicker or partial updates. |
| Serial-to-Parallel Shift Register Stage | Power Sequencer State Memory |
Use Scenario: Expanding microcontroller GPIO count by converting serial bitstream into parallel 2-bit control signals. IC Role / Device Role / Timing Role: Forms first two stages of shift register; CLK synchronized to SPI SCLK, D driven by MOSI. Use Value: Delivers deterministic 2-bit parallel output with <50 ns delay variation-critical for timing-sensitive peripheral enable sequencing. | Use Scenario: Storing power-on reset state for multi-rail DC/DC converters requiring staggered enable timing. IC Role / Device Role / Timing Role: Holds "rail-ready" flags for two independent voltage domains; PR/CLR used for global reset or domain-specific re-initialization. Use Value: Ensures repeatable power-up sequence across temperature (-55°C to +125°C) without software intervention. |
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 |
|---|---|---|---|
| SN74HCT74DR | SOIC-14 package; identical AC/DC specs; same 4.5–5.5 V range and 48 MHz fMAX. | Requires through-hole or larger footprint; less suitable for space-constrained industrial modules. | Select when board layout uses SOIC footprints or requires higher thermal mass for extended high-temp operation. |
| 74VHC74M | Higher VCC range (2–5.5 V); lower ICC (1 µA typ.); slightly slower fMAX (24 MHz at 5 V). | Supports mixed-voltage systems (e.g., 3.3 V logic with 5 V peripherals); not TTL-input compatible. | Select when operating below 4.5 V or ultra-low quiescent current is prioritized over speed or TTL interoperability. |
Compared with SN74HCT74DR and 74VHC74M, M74HCT74RM13TR uniquely combines TSSOP-14 miniaturization, guaranteed TTL input compatibility, and 48 MHz performance-making it optimal for compact, noise-immune, 5 V industrial control designs.
Availability
M74HCT74RM13TR is available at Aetrix Electronics and suitable for industrial PLC input latching, digital panel meter data capture, serial-to-parallel shift register stages, and power sequencer state memory requiring stable component supply across extended temperature ranges.
Supply support for M74HCT74RM13TR 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 analog, MCU, power, and discrete components for industrial, automotive, and consumer markets.
M74HCT74RM13TR belongs to the HCT logic family, engineered specifically for TTL-compatible 5 V systems requiring robust noise immunity, low static power, and high-speed edge-triggered storage in harsh environments.
FAQ
Is M74HCT74RM13TR pin-compatible with standard 74LS74?
Yes-M74HCT74RM13TR is functionally and pin-compatible with 74LS74, sharing identical pinout (TSSOP-14 matches SOIC-14 pin numbering), dual D-type architecture, and active-low preset/clear. However, its CMOS inputs draw negligible current versus LS TTL inputs, reducing loading on driving sources.
What is the maximum operating temperature range for this device?
The M74HCT74RM13TR is rated for continuous operation from –55 °C to +125 °C, validated per STMicroelectronics' industrial-grade qualification standards. This includes full AC/DC parameter compliance across the range, making it suitable for under-hood automotive sensors and outdoor industrial enclosures.
Does this part require external pull-up resistors on preset and clear inputs?
No-preset (PR) and clear (CLR) inputs are internally pulled up via weak current sources in the silicon gate C2MOS process. When left unconnected, they default to logic HIGH, disabling asynchronous control. External pull-ups are unnecessary unless noise immunity in high-EMI zones demands stronger biasing.
Can M74HCT74RM13TR drive LED indicators directly?
Yes-each Q output can sink or source up to 4 mA continuously. Driving a standard 2 mA LED (with series resistor) is safe at VCC = 5 V. For higher brightness or multiple LEDs, use external drivers, as cumulative output current per package must remain within ICC limits (20 µA quiescent, but transient peaks depend on load).
M74HCT74RM13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HCT
- 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:
- 48 MHz
- Max Propagation Delay @ V, Max CL:
- 33ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- 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
M74HCT74RM13TR FAQ
1.How can I place an order for M74HCT74RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HCT74RM13TR 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 M74HCT74RM13TR reliable?
The price and inventory of M74HCT74RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HCT74RM13TR is usually 5 days.
3.What payment methods are accepted for M74HCT74RM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HCT74RM13TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HCT74RM13TR?
M74HCT74RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HCT74RM13TR 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 M74HCT74RM13TR?
For technical support, including M74HCT74RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HCT74RM13TR requirements.
6.How does Aetrix verify that M74HCT74RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HCT74RM13TR 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 M74HCT74RM13TR meets industry standards.
7.What is the process for return or replacement of M74HCT74RM13TR?
All M74HCT74RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HCT74RM13TR, 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 M74HCT74RM13TR part is unused and in its original packaging.
Return procedure for M74HCT74RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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