My Inquiry
My Account
STMicroelectronics 74ACT14TTR
- Part No.:
- 74ACT14TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74ACT14TTR.pdf
- Description:
- IC INVERT SCHMIT 6CH 1IN 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,565
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74ACT14TTR from STMicroelectronics is a hex Schmitt-trigger inverter IC designed for noise-immune signal conditioning in high-speed digital interfaces. It delivers 7.2 ns typical propagation delay at 5 V, ±24 mA symmetrical output drive, and operates across 2 V to 5.5 V supply range-enabling robust interfacing between TTL, CMOS, and NMOS logic families in industrial control and data acquisition systems.
For engineers reviewing the 74ACT14TTR datasheet, 74ACT14TTR pinout, 74ACT14TTR application, or 74ACT14TTR equivalent, key selection criteria include hysteresis voltage (0.4–1.5 V), transmission-line driving capability (50 Ω), ESD immunity (2 kV), and TSSOP-14 package compatibility with space-constrained PCB layouts.
Technical Context
The device implements six independent Schmitt-trigger inverters using sub-micron C2MOS technology, with three-stage buffered output architecture that ensures stable switching and high noise immunity. Each gate features asymmetric input thresholds (Vt+ = 2.0 V, Vt− = 0.6 V) and 0.4–1.5 V hysteresis to reject slow-rising/falling signals on bus lines or sensor inputs.
It supports direct interfacing across logic families due to TTL-compatible input thresholds and CMOS-level output swing, while its 50 Ω transmission-line drive capability enables clean edge integrity without external termination resistors in point-to-point routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 7.2 ns typical at VCC = 5 V - enables ≤139 MHz toggle rate in single-gate configurations |
| Hysteresis Voltage | 0.4–1.5 V - rejects noise up to 1.5 V peak-to-peak on slow input edges |
| Output Drive | ±24 mA min - drives 50 Ω transmission lines directly without series termination |
| Supply Range | 2 V to 5.5 V - interoperable with 3.3 V and 5 V logic domains |
| Input Leakage | ±1 µA max at TA = −55°C to +125°C - preserves signal integrity in low-power standby modes |
| ESD Immunity | 2 kV HBM - protects against handling-induced discharge during assembly and field operation |
Pinout & Package
TSSOP-14 package: 4.9 × 6.4 mm body, 0.65 mm pitch, 14-pin surface-mount with exposed pad not present; RoHS-compliant, moisture sensitivity level MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | CMOS/TTL-compatible Schmitt-trigger inputs with hysteresis; accept slow edges without oscillation |
| 2, 4, 6, 8, 10, 12 | Output (1Y–6Y) | Inverted, rail-to-rail CMOS outputs with symmetrical sourcing/sinking capability |
| 7 | GND | Reference ground for all I/O and internal logic; must be low-impedance for noise suppression |
| 14 | VCC | Positive supply input; decoupling capacitor required within 5 mm for stable high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs per gate | Enables reliable switching on noisy or slowly transitioning signals (e.g., mechanical switch debouncing, analog sensor digitization) |
| 50 Ω transmission-line drive | Eliminates need for external series termination in point-to-point clock or data lines up to 100 MHz |
| 2 kV HBM ESD protection | Reduces risk of field failure during handling, board insertion, or system-level ESD events |
| Wide VCC range (2–5.5 V) | Supports mixed-voltage designs and brown-out tolerant operation in battery-backed systems |
Applications
| Industrial Sensor Interface | RS-232 Line Receiver Conditioning |
|---|---|
Use Scenario: Converting slow-rising analog sensor outputs (e.g., thermistor divider, potentiometer wiper) into clean digital logic levels. IC Role / Device Role / Timing Role: Schmitt-trigger inverter acting as noise-immune threshold comparator and signal shaper. Use Value: Eliminates multiple external components (RC filters, comparators) while ensuring glitch-free state transitions under EMI. | Use Scenario: Cleaning up degraded RS-232 receive signals before feeding into UART inputs. IC Role / Device Role / Timing Role: Input signal conditioner restoring logic-level integrity after long cable runs or noisy environments. Use Value: Prevents false framing errors by rejecting line noise below hysteresis threshold and sharpening edges. |
| Pushbutton Debounce Circuit | Legacy Bus Level Translation |
Use Scenario: Debouncing mechanical pushbuttons in human-machine interface panels or control cabinets. IC Role / Device Role / Timing Role: Digital input conditioner converting bounce-prone contact closure into single, clean logic transition. Use Value: Reduces firmware overhead and eliminates need for software debouncing timers or RC hardware filters. | Use Scenario: Interfacing 5 V TTL peripherals (e.g., legacy ADCs, DACs) with modern 3.3 V microcontrollers. IC Role / Device Role / Timing Role: Bidirectional voltage-level translator leveraging Schmitt thresholds and rail-swing outputs. Use Value: Maintains timing integrity across voltage domains without active translation ICs or resistor dividers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex Schmitt inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV14APWR | Lower VCC range (1.65–5.5 V); 10 ns tPD at 3.3 V; 8 mA drive; no 50 Ω line drive spec | Better suited for ultra-low-power 1.8/3.3 V systems; insufficient for 50 Ω transmission-line loads | Select when operating below 3.3 V and power budget is critical; avoid for 5 V or high-speed line driving |
| MC74VHC14DT | Same pinout; 7.5 ns tPD at 5 V; 8 mA drive; no guaranteed 50 Ω drive or 2 kV ESD rating | Lacks transmission-line drive validation and industrial-grade ESD margin; narrower temp range (−40°C to +85°C) | Acceptable for commercial-grade 5 V logic; not recommended for industrial or harsh-environment deployment |
Compared with SN74LV14APWR and MC74VHC14DT, the 74ACT14TTR uniquely combines 50 Ω line drive, 2 kV ESD, and full industrial temperature support (−55°C to +125°C), making it the only choice for ruggedized signal conditioning in factory automation and test equipment.
Availability
74ACT14TTR is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-232 signal conditioning, pushbutton debounce circuits, and legacy bus level translation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ACT14TTR 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 solutions with broad analog, digital, and mixed-signal product portfolios.
The 74ACT14 belongs to ST's legacy high-speed CMOS logic family, engineered specifically for robust signal integrity in mixed-technology digital systems where noise immunity, voltage-level interoperability, and reliability under thermal stress are critical.
FAQ
What is the minimum supply voltage for guaranteed Schmitt-trigger operation?
The 74ACT14TTR guarantees correct Schmitt behavior down to VCC = 2.0 V, with specified hysteresis (0.4–1.5 V) and input thresholds (Vt+ = 2.0 V, Vt− = 0.6 V) validated across −55°C to +125°C. Below 2.0 V, hysteresis collapses and input thresholds shift unpredictably, risking metastability.
Can 74ACT14TTR drive a 50 Ω coaxial cable directly?
Yes-the device is explicitly characterized for 50 Ω transmission-line driving capability per output, with symmetrical ±24 mA drive strength and balanced tPLH/tPHL delays. No external series resistor is needed for point-to-point 50 Ω traces up to 15 cm at 5 V supply.
Is the TSSOP-14 package lead-free and RoHS-compliant?
Yes-74ACT14TTR uses a standard RoHS-compliant, lead-free TSSOP-14 package (JEDEC MO-153 variant), qualified to MSL3 per J-STD-020, with matte-tin finish on all leads and no exemption-required substances.
How does the 74ACT14TTR differ from standard 74HC14 in industrial use?
Unlike 74HC14, the 74ACT14TTR offers 2 kV HBM ESD protection, guaranteed 50 Ω line drive, tighter propagation delay matching (tPLH ≅ tPHL), and full −55°C to +125°C operation-making it suitable for factory-floor PLC I/O modules and motor drive feedback conditioning where HC variants fail prematurely.
74ACT14TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74ACT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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):
- 4 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.6V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 11.4ns @ 5V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74ACT14TTR FAQ
1.How can I place an order for 74ACT14TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT14TTR 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 74ACT14TTR reliable?
The price and inventory of 74ACT14TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT14TTR is usually 5 days.
3.What payment methods are accepted for 74ACT14TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT14TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT14TTR?
74ACT14TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT14TTR 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 74ACT14TTR?
For technical support, including 74ACT14TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT14TTR requirements.
6.How does Aetrix verify that 74ACT14TTR is sourced from the original manufacturer or authorized distributors?
All 74ACT14TTR 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 74ACT14TTR meets industry standards.
7.What is the process for return or replacement of 74ACT14TTR?
All 74ACT14TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT14TTR, 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 74ACT14TTR part is unused and in its original packaging.
Return procedure for 74ACT14TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ACT14TTR Tags
-
SN74LVC1G14DBVR
Texas Instruments
-
SN74LVC1G14DCKR
Texas Instruments
-
SN74AHC1G14DBVR
Texas Instruments
-
SN74LVC1G08DBVR
Texas Instruments
-
SN74LVC1G08DCKR
Texas Instruments
-
SN74LVC1G32DCKR
Texas Instruments
-
SN74LVC1G04DBVR
Texas Instruments
.jpg)
-
74LVC1G08GW,125
Nexperia USA Inc.
-
SN74LVC1G04DCKR
Texas Instruments
-
SN74AHC1G08DBVR
Texas Instruments
-
SN74LVC1G32DBVR
Texas Instruments
-
SN74AHCT1G08DBVR
Texas Instruments
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
