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STMicroelectronics M74HC73TTR
- Part No.:
- M74HC73TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M74HC73TTR.pdf
- Description:
- IC FF JK TYPE DUAL 1BIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,470
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Product details
Overview
M74HC73TTR from STMicroelectronics is a high-speed CMOS dual J-K flip-flop with independent asynchronous clear, fabricated in silicon gate C2MOS technology. It operates across 2V–6V supply, delivers 80MHz max clock frequency (typ.) at 6V, and features symmetrical 4mA output drive, balanced tPLH/tPHL propagation delays, and 2µA max ICC at 25°C. Used in synchronous logic control, state machines, and clock-domain synchronization in industrial PLCs and instrumentation.
For engineers reviewing the M74HC73TTR datasheet, M74HC73TTR pinout, M74HC73TTR application, or M74HC73TTR equivalent, key selection criteria include dual J-K functionality with asynchronous reset, TSSOP-14 package compatibility, guaranteed operation from –55°C to +125°C, and verified 4.5V/6V AC timing performance per STMicroelectronics specification sheets.
Technical Context
The M74HC73TTR implements two independent edge-triggered J-K flip-flops, each responding to the negative-going transition of its dedicated clock input (1CK/2CK). Clear inputs (1CLR/2CLR) are active-low and asynchronous, overriding clock and J/K states to force Q = L and Q̅ = H regardless of clock phase.
Input thresholds meet 28% VCC noise immunity (VIH ≥ 3.15V @ 4.5V, VIL ≤ 1.35V), and DC output drive is specified at ±4mA (VOH ≥ 4.18V, VOL ≤ 0.26V @ 4.5V, IO = 4mA). Propagation delay from CK to Q is 25ns (typ.) and 38ns (max) at 4.5V, with setup time ts = 15ns (max) and zero hold time requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 6V - supports mixed-voltage system interfacing and battery-powered operation down to 2V |
| Max Clock Frequency | 80MHz (typ.) at VCC = 6V - enables high-speed state sequencing in real-time control loops |
| Output Drive Strength | ±4mA (min.) - sufficient to drive 10 LS-TTL loads or multiple CMOS inputs without buffering |
| Propagation Delay (CK→Q) | 25ns (typ.) @ 4.5V - ensures predictable timing margins in 25MHz+ synchronous designs |
| Quiescent Current | 2µA (max.) @ TA = 25°C - critical for low-power standby modes in energy-sensitive applications |
| Operating Temperature | –55°C to +125°C - qualified for under-hood automotive, industrial motor drives, and outdoor equipment |
| Noise Immunity | VNIH/VNIL = 28% VCC (min.) - rejects >1.26V noise spikes on 4.5V rails without false triggering |
Pinout & Package
TSSOP-14 package: 4.9 × 6.4 mm body, 0.65 mm pitch, 1.2 mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | 1CK, 2CK | Negative-edge clock inputs - trigger state change only on falling edge; require clean monotonic transitions |
| 2, 6 | 1CLR, 2CLR | Active-low asynchronous reset - forces Q = L / Q̅ = H immediately, independent of clock or J/K |
| 12, 9 | 1Q, 2Q | True outputs - provide registered logic state; fan-out limited by 4mA drive capability |
| 13, 8 | 1Q̅, 2Q̅ | Complement outputs - enable direct implementation of toggle or toggle-enable functions without inverters |
| 14, 7, 3, 10 | 1J, 2J, 1K, 2K | Synchronous data inputs - define next-state behavior (set, reset, toggle, hold) on next clock edge |
| 11 | GND | Ground reference - must be low-impedance connection to minimize ground bounce in high-speed switching |
| 4 | VCC | Positive supply - bypass with 100nF ceramic capacitor near pin to suppress supply transients |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent J-K flip-flops | Enables compact implementation of two-bit counters, shift registers, or parallel load registers in single IC |
| Asynchronous active-low clear | Allows immediate, clock-independent initialization of control logic-critical for safe startup and fault recovery |
| High noise immunity (28% VCC) | Reduces susceptibility to EMI-induced glitches in electrically noisy industrial environments |
| Balanced tPLH/tPHL delays | Minimizes duty-cycle distortion in clock-divided outputs, supporting stable 50% duty cycle generation |
| Wide 2V–6V operating range | Permits direct interface with 3.3V microcontrollers and 5V legacy peripherals without level-shifting |
Applications
| Industrial PLC Logic Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Implementing sequenced relay activation and interlock safety logic in modular I/O racks. IC Role / Device Role / Timing Role: Dual J-K flip-flop providing synchronized state storage and asynchronous emergency reset for fail-safe shutdown paths. Use Value: Guaranteed –55°C to +125°C operation and 2µA quiescent current ensure reliability during extended vehicle off-state and under-hood thermal stress. | Use Scenario: Managing window lift/lower sequence with direction hold and anti-pinch timeout logic. IC Role / Device Role / Timing Role: Edge-triggered state register capturing switch events and generating controlled motor drive enable signals. Use Value: 80MHz fMAX and 25ns propagation delay support precise 10ms-level timing windows required for ISO 11898-compliant CAN subsystem coordination. |
| Test Equipment Pattern Generators | Medical Infusion Pump Controllers |
Use Scenario: Generating deterministic multi-phase stimulus waveforms for semiconductor ATE channel calibration. IC Role / Device Role / Timing Role: Synchronous J-K configuration used as programmable divider and phase shifter in digital pattern sequencers. Use Value: Symmetrical tPLH/tPHL and 4mA drive ensure <1ns skew between complementary outputs-critical for sub-nanosecond timing fidelity. | Use Scenario: Maintaining dose delivery state and alarm latching across power cycles and brownout conditions. IC Role / Device Role / Timing Role: Asynchronous clear enables hardware-initiated fault reset; J-K toggling controls stepper motor phase sequencing. Use Value: 2V minimum VCC allows continued operation during battery sag to 2.2V, meeting IEC 60601-1 backup power requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual J-K flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC73DR | TI part in SOIC-14; identical AC/DC specs but rated only to +85°C (vs. +125°C) | Limited to commercial/industrial ambient; unsuitable for under-hood or extended-temperature deployments | Select when cost sensitivity outweighs extended temperature need and SOIC footprint is preferred |
| 74HC73PW,118 | Nexperia TSSOP-14; same pinout and function, but CPD = 30pF (vs. 35pF) and fMAX = 75MHz (typ.) | Slightly lower dynamic power at high frequency; marginally reduced max clock rate | Choose for lower average power in battery-operated portable diagnostics equipment |
Compared with SN74HC73DR and 74HC73PW,118, the M74HC73TTR provides the widest temperature range (–55°C to +125°C), highest guaranteed fMAX (80MHz), and best noise immunity-making it optimal for mission-critical automotive and industrial control where environmental robustness is non-negotiable.
Availability
M74HC73TTR is available at Aetrix Electronics and suitable for industrial PLC logic modules, automotive body control units, test equipment pattern generators, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HC73TTR 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, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The M74HC73 belongs to ST's high-speed HC logic family, engineered for robust performance in harsh environments-specifically targeting industrial automation, automotive electronics, and medical devices requiring extended temperature operation and high noise immunity.
FAQ
Is M74HC73TTR pin-compatible with standard 74LS73?
Yes-M74HC73TTR is pin- and function-compatible with 74LS73 and 74HC73 variants, sharing identical TSSOP-14 pinout and truth table. However, it operates at higher speed (80MHz vs. 30MHz) and lower power (2µA vs. 15mA), with CMOS input thresholds instead of TTL. Level-shifting is not required when replacing 74LS73 in 5V systems.
Does M74HC73TTR support preset functionality?
No-the M74HC73TTR implements only asynchronous clear (CLR), not preset (PRE). Its truth table confirms no PRE input; state initialization is achieved solely via CLR. For preset-capable dual J-K flip-flops, consider M74HC107 or SN74HC109, which include separate PRE̅ inputs.
What is the maximum capacitive load this device can drive reliably?
At VCC = 4.5V and TA = 25°C, M74HC73TTR maintains valid VOH/VOL levels driving up to 50pF (per AC test condition). With heavier loads (>100pF), propagation delay increases and rise/fall times degrade; external buffer drivers are recommended for >100pF or transmission-line routing.
Can M74HC73TTR operate at 3.3V supply?
Yes-it is fully specified from 2V to 6V, including 3.3V. At 3.3V, fMAX = 40MHz (min.), tPLH/tPHL ≈ 35ns (max), and VIH/VIL thresholds scale to 2.31V/1.09V (28% of 3.3V), ensuring reliable interfacing with 3.3V microcontrollers and FPGAs without level translation.
M74HC73TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Set(Preset) and Reset
- Type:
- JK Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 80 MHz
- Max Propagation Delay @ V, Max CL:
- 21ns @ 6V, 50pF
- Trigger Type:
- Negative 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-TSSOP
M74HC73TTR FAQ
1.How can I place an order for M74HC73TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC73TTR 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 M74HC73TTR reliable?
The price and inventory of M74HC73TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC73TTR is usually 5 days.
3.What payment methods are accepted for M74HC73TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC73TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC73TTR?
M74HC73TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC73TTR 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 M74HC73TTR?
For technical support, including M74HC73TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC73TTR requirements.
6.How does Aetrix verify that M74HC73TTR is sourced from the original manufacturer or authorized distributors?
All M74HC73TTR 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 M74HC73TTR meets industry standards.
7.What is the process for return or replacement of M74HC73TTR?
All M74HC73TTR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC73TTR, 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 M74HC73TTR part is unused and in its original packaging.
Return procedure for M74HC73TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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