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STMicroelectronics 74LCX08TTR
- Part No.:
- 74LCX08TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LCX08TTR.pdf
- Description:
- IC GATE AND 4CH 2-INP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,752
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Product details
Overview
74LCX08TTR from STMicroelectronics is a low-voltage CMOS quad 2-input AND gate with 5V-tolerant inputs, designed for 3.3V logic systems interfacing to 5V signal environments. It delivers tPD = 4.1 ns (max) at VCC = 3.0–3.6 V, symmetrical output drive (|IOH| = IOL = 24 mA min), and operates across 2.0–3.6 V supply range - used in PCI bus interface circuits requiring high-speed, low-power 3.3V logic.
For engineers reviewing the 74LCX08TTR datasheet, 74LCX08TTR pinout, 74LCX08TTR application, or 74LCX08TTR equivalent, key selection criteria include 5V input tolerance, 24 mA output drive capability at 3V, propagation delay matching (tPLH ≅ tPHL), and TSSOP-14 package compatibility with space-constrained board layouts.
Technical Context
This device implements four independent 2-input AND gates in a single monolithic CMOS IC using sub-micron C2MOS process. Each gate features identical AC/DC electrical behavior, with guaranteed truth table operation from 1.5 V to 3.6 V and 5V-tolerant inputs enabling mixed-voltage system interconnect without level shifters.
It incorporates power-down protection on all I/O pins, latch-up immunity >500 mA (JESD17), and ESD robustness (HBM >2000 V, MM >200 V). Output impedance is balanced (|IOH| = IOL), ensuring matched rise/fall times and minimizing skew (tOSLH/tOSHL ≤1.0 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - supports 3.3V nominal rail with 1.5V data retention during sleep mode |
| tPD (Max) | 4.1 ns at VCC = 3.0–3.6 V - enables ≥200 MHz toggle rate in fanout-1 conditions |
| IOL / IOH | ±24 mA min at VCC = 3.0–3.6 V - drives standard PCI bus loads without external buffers |
| Input Voltage | 0 to 5.5 V - allows direct connection to 5V TTL/CMOS outputs without clamping diodes |
| VIL / VIH | 0.8 V / 2.0 V at VCC = 2.7–3.6 V - ensures noise margin >0.4 V in 3.3V systems |
| Skew (Max) | 1.0 ns - guarantees synchronized switching across all four gates for timing-critical control paths |
| CIN | 6 pF - minimizes capacitive loading on driving signals in high-speed bus applications |
Pinout & Package
TSSOP-14 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 14-pin thin shrink small outline package with exposed pad not present; compliant with JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | 1A–4A Inputs | First input of each AND gate; 5V-tolerant, accepts 0–5.5 V logic levels |
| 2, 5, 10, 13 | 1B–4B Inputs | Second input of each AND gate; same 5V-tolerant specification as A inputs |
| 3, 6, 8, 11 | 1Y–4Y Outputs | AND result outputs; symmetrical ±24 mA drive, rail-to-rail swing (0 to VCC) |
| 7 | GND | Ground reference for all internal circuitry and I/O; must be low-impedance return path |
| 14 | VCC | Primary power supply (2.0–3.6 V); decoupling capacitor required within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Enables direct interfacing between 3.3V logic and legacy 5V peripherals without external level translators |
| Symmetrical output drive | Ensures matched tPLH and tPHL propagation delays, reducing timing skew in parallel data paths |
| Power-down I/O protection | Prevents back-driving and current leakage when VCC = 0 V, critical for hot-swap and partial-power-down systems |
| Latch-up immunity >500 mA | Guarantees robust operation under transient overvoltage or ESD events per JESD17 Class II |
| Low dynamic power (CPD = 38 pF) | Reduces ICC(opr) to ~1.3 mA per gate at 10 MHz, supporting battery-sensitive portable designs |
Applications
| PCI Bus Interface | 3.3V/5V Mixed-Voltage Logic Translation |
|---|---|
Use Scenario: Interfacing 3.3V FPGA I/O banks to legacy 5V PCI add-in cards in industrial control backplanes. IC Role / Device Role / Timing Role: Level-shifting AND gate for address/data strobe enable logic with precise setup/hold timing. Use Value: Eliminates discrete resistor-divider or dedicated translator ICs while maintaining <1 ns skew across four parallel control lines. | Use Scenario: Glue logic between 5V microcontroller peripherals (e.g., UART, SPI) and 3.3V sensor subsystems in automotive body controllers. IC Role / Device Role / Timing Role: Input validation gate that only asserts signals when both 5V host and 3.3V peripheral are active and ready. Use Value: Prevents spurious activation during power sequencing by leveraging 5V-tolerant inputs and clean 3.3V output swing. |
| Low-Power Industrial PLC I/O Modules | Hot-Swappable Backplane Control Logic |
Use Scenario: Enabling/disabling isolated digital input channels in DIN-rail mounted programmable logic controllers operating at 3.3V core voltage. IC Role / Device Role / Timing Role: Enable gate for optocoupler driver stages, synchronized across multiple channels via shared clock edge. Use Value: Delivers 24 mA sink/source to drive LED anodes/cathodes directly, reducing BOM count versus transistor-based solutions. | Use Scenario: Managing insertion detection and power-enable sequencing for hot-pluggable mezzanine cards in telecom base station shelves. IC Role / Device Role / Timing Role: Power-good AND gate combining card-present and primary rail OK signals before releasing reset. Use Value: Power-down protection prevents backfeed into unpowered slots, satisfying IEC 61000-4-2 and hot-swap safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input AND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC08APWR | Same VCC range (1.65–3.6 V), lower tPD = 3.7 ns (typ), but only 5V-tolerant on inputs - no output 5V tolerance | Requires external clamping if driving 5V loads; better suited for pure 3.3V systems with tighter timing budgets | Select when maximum speed at 3.3V is prioritized over mixed-voltage output interfacing |
| 74ALVC08PW,118 | Wider VCC range (1.65–3.6 V), higher IOL = 24 mA (min) at VCC = 2.3 V, but no guaranteed 5V input tolerance beyond absolute max ratings | Not qualified for direct 5V input use; requires external series resistors or Schottky clamps for 5V interface | Select for ultra-low-voltage operation down to 1.65 V where 5V input tolerance is not required |
Compared with SN74LVC08APWR and 74ALVC08PW,118, the 74LCX08TTR uniquely combines guaranteed 5V input tolerance, symmetrical 24 mA drive, and TSSOP-14 footprint - making it the only choice for PCI-compliant 3.3V/5V boundary logic without redesigning I/O protection.
Availability
74LCX08TTR is available at Aetrix Electronics and suitable for PCI bus interface design, mixed-voltage logic translation, and low-power industrial PLC I/O modules requiring stable component supply across extended temperature ranges (–55 °C to +125 °C).
Supply support for 74LCX08TTR 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, delivering silicon solutions for automotive, industrial, and consumer markets with emphasis on reliability, energy efficiency, and system integration.
The 74LCX logic family was engineered specifically for high-speed, low-voltage 3.3V system interfacing - balancing performance, power, and robustness in mixed-signal and mixed-voltage embedded platforms.
FAQ
Is 74LCX08TTR pin-compatible with standard 74LS08 or 74HC08?
Yes - it is pin- and function-compatible with the 74-series 08 AND gate (e.g., 74HC08, 74LS08) in TSSOP-14 package. All 14 pins map identically: inputs A/B on pins 1/2/4/5/9/10/12/13, outputs Y on pins 3/6/8/11, VCC on pin 14, GND on pin 7. No PCB redesign is needed for drop-in replacement in 3.3V systems.
Can 74LCX08TTR safely drive a 5V load?
No - its outputs swing only from GND to VCC (max 3.6 V), and absolute maximum VO is VCC + 0.5 V. Driving a true 5V load risks violating VO rating and may cause latch-up. Use only with 3.3V-compatible receivers; 5V-tolerance applies exclusively to inputs.
What decoupling capacitance is recommended for 74LCX08TTR?
A minimum 100 nF X7R ceramic capacitor placed within 5 mm of pin 14 (VCC) and pin 7 (GND) is required. For systems operating above 50 MHz or with multiple devices, add a 10 nF capacitor in parallel to suppress high-frequency noise and maintain stable VCC under fast switching transients.
Does 74LCX08TTR support partial power-down operation?
Yes - its inputs and outputs feature power-down protection: when VCC = 0 V, all I/O pins remain high-impedance with leakage <10 µA (Ioff), preventing back-current flow. This allows safe operation in systems where logic sections power up/down independently, such as modular computing backplanes.
74LCX08TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LCX
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- AND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Max):
- 10 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 4.1ns @ 3.3V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74LCX08TTR FAQ
1.How can I place an order for 74LCX08TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LCX08TTR 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 74LCX08TTR reliable?
The price and inventory of 74LCX08TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCX08TTR is usually 5 days.
3.What payment methods are accepted for 74LCX08TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCX08TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LCX08TTR?
74LCX08TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LCX08TTR 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 74LCX08TTR?
For technical support, including 74LCX08TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCX08TTR requirements.
6.How does Aetrix verify that 74LCX08TTR is sourced from the original manufacturer or authorized distributors?
All 74LCX08TTR 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 74LCX08TTR meets industry standards.
7.What is the process for return or replacement of 74LCX08TTR?
All 74LCX08TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LCX08TTR, 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 74LCX08TTR part is unused and in its original packaging.
Return procedure for 74LCX08TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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