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STMicroelectronics M74HCT14RM13TR
- Part No.:
- M74HCT14RM13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M74HCT14RM13TR.pdf
- Description:
- IC INVERT SCHMITT 6CH 1-INP 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,806
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Product details
Overview
M74HCT14RM13TR from STMicroelectronics is a high-speed CMOS hex Schmitt inverter with 0.7 V typical hysteresis, 19 ns typical propagation delay at 4.5 V, ±4 mA symmetrical output drive, and TTL/NMOS interface compatibility. It conditions slow-rising industrial sensor signals in noise-prone environments and enables robust digital input reception in motor control feedback circuits.
For engineers reviewing the M74HCT14RM13TR datasheet, M74HCT14RM13TR pinout, M74HCT14RM13TR application, or M74HCT14RM13TR equivalent, key selection criteria include hysteresis voltage (0.4–1.5 V), VIH/VIL thresholds (1.2–2.1 V / 0.5–1.4 V), output drive strength (4 mA min), operating temperature range (–55°C to +125°C), and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
The M74HCT14RM13TR implements six independent Schmitt-trigger inverters using silicon gate C2MOS technology, each with asymmetric input threshold switching (VP ≈ 1.55 V, VN ≈ 0.85 V at VCC = 4.5 V) yielding 0.7 V nominal hysteresis. Its balanced tPLH/tPHL delays (19 ns typ.) and symmetrical |IOH|/IOL (≥4 mA) support clean signal regeneration without duty-cycle distortion.
Designed for mixed-logic interfacing, it accepts TTL-level inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V) while driving CMOS loads at 5 V, with input protection diodes and ±20 mA absolute max I/O current limiting. The device operates across –55°C to +125°C with ICC ≤ 10 µA over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation with standard 5 V supply rails and ±5% tolerance |
| Hysteresis Voltage VH | 0.4 V to 1.5 V - Rejects noise up to 1.5 V peak-to-peak on slow edges without false triggering |
| tPD Propagation Delay | 19 ns (typ) at VCC = 4.5 V - Enables reliable timing in sub-25 MHz clock/data conditioning paths |
| IOL / IOH Drive | ≥4 mA - Sinks/supplies sufficient current to directly drive multiple 74HCT inputs or LED indicators |
| Operating Temperature | –55°C to +125°C - Qualified for under-hood automotive, industrial PLC, and power converter control environments |
| Input Capacitance CIN | 10 pF - Minimizes loading on preceding stage; supports >10 MHz signal integrity in RC-limited traces |
| ICC Quiescent Current | ≤10 µA (–40°C to +85°C) - Enables low-power wake-up detection in always-on monitoring circuits |
Pinout & Package
TSSOP-14 package: 4.9 × 6.4 mm body, 0.65 mm pitch, 14-pin surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Data Input (1A–6A) | Schmitt-triggered CMOS inputs accepting TTL-compatible logic levels with hysteresis |
| 2, 4, 6, 8, 10, 12 | Data Output (1Y–6Y) | Inverted, buffered outputs with symmetrical sourcing/sinking capability (≥4 mA) |
| 7 | GND | Reference ground for all inputs, outputs, and internal logic; requires low-impedance PCB connection |
| 14 | VCC | Positive supply rail (4.5–5.5 V); decoupling capacitor (100 nF) required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Six independent Schmitt inverters | Enables simultaneous debouncing of six mechanical switch or encoder channels without external components |
| 0.7 V typical hysteresis | Rejects EMI-induced glitches on long cables or unshielded sensor lines in factory automation |
| TTL/NMOS input compatibility | Directly interfaces legacy microcontroller GPIO, optocoupler outputs, and discrete transistor logic |
| ±20 mA input diode current rating | Withstands transient ESD events per IEC 61000-4-2 Level 3 (±8 kV contact) without external clamping |
| 10 pF input capacitance | Reduces capacitive loading on high-impedance sources such as thermistor divider networks or piezo sensors |
Applications
| Industrial Switch Debouncing | Motor Encoder Signal Conditioning |
|---|---|
Use Scenario: Mechanical limit switches in CNC machine tools generate noisy, bouncing contacts during actuation. IC Role / Device Role / Timing Role: Schmitt inverter acting as hardware-level digital filter for each switch channel before MCU interrupt input. Use Value: Eliminates need for software debounce routines or RC filters, reducing firmware latency and PCB component count. | Use Scenario: Quadrature A/B signals from optical encoders exhibit slow rise/fall times due to long cable runs in servo drives. IC Role / Device Role / Timing Role: Six-channel signal regenerator restoring sharp edges and consistent duty cycle for position tracking. Use Value: Prevents missed counts and direction errors at speeds up to 2.5 MHz (based on 19 ns tPD margin). |
| Automotive Sensor Interface | Power Supply Monitor Logic |
Use Scenario: Hall-effect crankshaft position sensors output low-slew-rate analog pulses affected by engine bay EMI. IC Role / Device Role / Timing Role: Threshold comparator with hysteresis converting analog pulses into clean CMOS logic for ECU timing capture. Use Value: Maintains ignition timing accuracy across –40°C to +125°C ambient with no calibration drift. | Use Scenario: Monitoring undervoltage lockout (UVLO) and overvoltage detection thresholds on 5 V system rails. IC Role / Device Role / Timing Role: Inverting logic element enabling active-high reset assertion when supply falls below safe level. Use Value: Provides deterministic, noise-immune trip points independent of MCU ADC sampling rate or software polling interval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schmitt inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT14DR | Same logic function, identical DC/AC specs, but SOIC-14 package (larger footprint, 1.27 mm pitch) | Less suitable for high-density automotive or portable designs requiring TSSOP-14 miniaturization | Select when board space allows larger package and lead time for TSSOP is constrained |
| 74LVC14APW | Lower VCC range (1.65–5.5 V), higher speed (tPD = 5.2 ns typ), but reduced hysteresis (0.3 V typ) and narrower VIH/VIL margins | Not recommended for noisy 5 V industrial lines; better suited for battery-powered 3.3 V systems with fast edges | Select only if operating at 3.3 V with clean signals and need for sub-10 ns response |
Compared with SN74HCT14DR and 74LVC14APW, the M74HCT14RM13TR uniquely balances industrial-grade noise immunity (0.7 V hysteresis), wide temperature operation (–55°C to +125°C), and compact TSSOP-14 packaging-making it optimal for space-constrained, high-reliability 5 V embedded control.
Availability
M74HCT14RM13TR is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, and power supply monitoring applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HCT14RM13TR 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities.
The M74HCT14 belongs to ST's HCT logic family, engineered for seamless TTL-to-CMOS bridging in harsh-environment control systems where noise immunity and temperature resilience are critical.
FAQ
What is the maximum input frequency supported by the M74HCT14RM13TR?
The M74HCT14RM13TR does not specify a maximum clock frequency, but its 19 ns typical propagation delay and 8 ns typical output transition time support reliable operation up to approximately 25 MHz for clean square-wave inputs. For slow-rising signals (e.g., <1 V/µs), performance depends on hysteresis and input slew rate-not frequency alone.
Can the M74HCT14RM13TR operate at 3.3 V supply?
No. The M74HCT14RM13TR is specified only for VCC = 4.5 V to 5.5 V. At 3.3 V, input thresholds become undefined, hysteresis collapses, and output drive falls outside guaranteed specifications. Use 74LVC14 or 74AHC14 for 3.3 V operation.
Is the M74HCT14RM13TR pin-compatible with standard 74HCT04 devices?
Yes-pin configuration matches the 74HCT04, but all six inputs incorporate Schmitt-trigger action. Outputs are functionally identical, allowing drop-in replacement where hysteresis is beneficial. No changes to PCB layout or wiring are needed.
Does this device require external pull-up or pull-down resistors on unused inputs?
No. Unused inputs must be tied HIGH or LOW to prevent floating states that increase ICC and cause erratic output switching. Internal input protection diodes do not eliminate the need for defined DC bias-leaving inputs unconnected risks oscillation and excessive power consumption.
M74HCT14RM13TR 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
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- Schmitt Trigger
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.5V ~ 0.6V
- Input Logic Level - High:
- 1.9V ~ 2.1V
- Max Propagation Delay @ V, Max CL:
- 30ns @ 4.5V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
M74HCT14RM13TR FAQ
1.How can I place an order for M74HCT14RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HCT14RM13TR 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 M74HCT14RM13TR reliable?
The price and inventory of M74HCT14RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HCT14RM13TR is usually 5 days.
3.What payment methods are accepted for M74HCT14RM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HCT14RM13TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HCT14RM13TR?
M74HCT14RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HCT14RM13TR 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 M74HCT14RM13TR?
For technical support, including M74HCT14RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HCT14RM13TR requirements.
6.How does Aetrix verify that M74HCT14RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HCT14RM13TR 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 M74HCT14RM13TR meets industry standards.
7.What is the process for return or replacement of M74HCT14RM13TR?
All M74HCT14RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HCT14RM13TR, 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 M74HCT14RM13TR part is unused and in its original packaging.
Return procedure for M74HCT14RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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