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onsemi MC74LCX125DTR2
- Part No.:
- MC74LCX125DTR2
- Manufacturer:
- onsemi
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC74LCX125DTR2.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,734
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Product details
Overview
MC74LCX125DTR2 from onsemi is a low-voltage CMOS quad non-inverting 3-state buffer with 5 V-tolerant inputs/outputs, operating from 1.65 V to 5.5 V supply. It delivers 24 mA balanced output drive at 3.0 V, features near-zero static ICC (10 µA), and supports live insertion in bus-oriented systems such as memory address drivers and TTL-level transceivers.
For engineers reviewing the MC74LCX125DTR2 datasheet, pinout, applications, or equivalent options, key selection factors include 5.5 V input tolerance, 4.7 ns max propagation delay at 4.5–5.5 V, 3-State enable timing (tPZH/tPLZ ≤ 5.0 ns), and AEC-Q100 qualification for automotive use.
Technical Context
The MC74LCX125DTR2 implements four independent non-inverting buffers, each with dedicated active-HIGH Output Enable (OEn) control enabling high-impedance tri-state operation. Its IOFF specification ensures high-impedance outputs when VCC = 0 V, supporting hot-swap capability.
Designed for mixed-voltage system interfacing, it accepts 5.0 V logic inputs while powered from as low as 1.65 V, and provides LVTTL/LVCMOS-compatible outputs. The device meets ESD >2000 V (HBM) and latchup immunity >100 mA per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.5 V - Enables direct interface between 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| Input Voltage Tolerance | −0.5 V to +6.5 V - Allows safe connection to 5 V TTL sources even when VCC = 1.65 V. |
| Propagation Delay (tPLH/tPHL) | 4.7 ns max at 4.5–5.5 V - Supports high-speed bus driving up to ~210 MHz clock-equivalent operation. |
| Output Drive Strength | ±24 mA at 3.0 V - Sustains robust signal integrity across loaded PCB traces and multiple TTL inputs. |
| Quiescent Supply Current | 10 µA max - Minimizes standby power in battery-backed or energy-sensitive embedded systems. |
| Operating Temperature | −40 °C to +125 °C - Qualified for under-hood automotive and industrial control environments. |
| ESD Rating (HBM) | >2000 V - Provides inherent handling robustness during assembly and field service. |
Pinout & Package
TSSOP-14 package (Case 948G), 4.4 mm × 5.0 mm footprint, 0.65 mm pitch, lead-free (G suffix), moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OEn (Output Enable n) | Active-HIGH control per buffer; asserts HIGH to place On output in high-impedance state. |
| 2, 5, 9, 12 | Dn (Data Input n) | Non-inverting input; accepts 5 V-tolerant logic levels regardless of VCC voltage. |
| 3, 6, 8, 11 | On (Output n) | 3-State buffered output; drives HIGH/LOW or floats based on corresponding OEn state. |
| 7 | GND | Ground reference for all logic and I/O circuits; must be low-impedance connection. |
| 14 | VCC | Primary power supply; powers internal logic and output drivers; range 1.65–5.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant I/O | Enables seamless interconnection with legacy 5 V TTL systems while operating from sub-3.3 V supplies. |
| IOFF protection | Guarantees high-impedance outputs during power-down (VCC = 0 V), preventing back-driving of powered rails. |
| Live insertion support | Allows safe board insertion/removal in powered-backplane systems without disrupting bus operation. |
| LVTTL/LVCMOS compatibility | Meets both logic families' voltage thresholds, simplifying integration into heterogeneous digital subsystems. |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
Applications
| Memory Address Driving | Bus Transceiver Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a low-voltage microcontroller to external SRAM or Flash memory. IC Role / Device Role / Timing Role: Quad buffer isolates controller I/O from memory bus capacitance and fan-out load. Use Value: 24 mA drive strength maintains clean edge rates across 10+ cm traces; 4.7 ns delay enables reliable setup/hold timing at 50 MHz bus clocks. |
Use Scenario: Bidirectional data bus isolation between 3.3 V FPGA and 5 V peripheral ASIC in industrial PLC backplane. IC Role / Device Role / Timing Role: Non-inverting buffer with 5 V-tolerant inputs acts as unidirectional level translator and bus driver. Use Value: VI = 5.5 V rating allows direct connection to 5 V outputs; tPZH ≤ 5.0 ns ensures fast enable/disable transitions during bus arbitration. |
| Automotive Sensor Hub | Hot-Swappable Module Interface |
Use Scenario: Signal conditioning and buffering of analog-to-digital converter (ADC) control signals in an AEC-Q100-compliant vehicle sensor cluster. IC Role / Device Role / Timing Role: Buffering GPIO lines from MCU to ADC and CAN transceiver peripherals under extended temperature conditions. Use Value: −40 °C to +125 °C operation and 10 µA ICC ensure reliability in under-dash environments; IOFF prevents leakage during sleep mode. |
Use Scenario: Enabling/disabling communication paths in modular test equipment where daughterboards are inserted while main chassis remains powered. IC Role / Device Role / Timing Role: 3-state control via OEn pins manages bus contention during module plug-in/out sequences. Use Value: Live insertion support and high-impedance isolation prevent bus glitches; 2000 V HBM ESD withstand protects against operator-induced discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad non-inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APW | Same 14-pin TSSOP package; 1.65–3.6 V only; no 5 V tolerance; 24 mA drive at 3.3 V. | Not suitable for 5 V system interfacing; requires external level shifting if driving 5 V loads. | Select when full 5 V tolerance is unnecessary and cost optimization is prioritized in 3.3 V-only designs. |
| 74ALVC125PW | 1.65–3.6 V operation; 50 mA drive at 3.3 V; faster tPLH = 2.5 ns; no AEC-Q100 qualification. | Higher drive and speed but lacks automotive qualification and 5 V input tolerance. | Prefer for high-speed industrial FPGA I/O expansion where automotive compliance is not required. |
Compared with SN74LVC125APW and 74ALVC125PW, the MC74LCX125DTR2 uniquely combines 5 V-tolerant I/O, AEC-Q100 qualification, and 1.65–5.5 V operation-making it the only option among the three qualified for direct 5 V interface in automotive-grade hot-swap applications.
Availability
MC74LCX125DTR2 is available at Aetrix Electronics and suitable for memory address driving, bus transceiver interfaces, automotive sensor hubs, and hot-swappable module interfaces requiring stable component supply and long-term industrial lifecycle support.
Supply support for MC74LCX125DTR2 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74LCX125DTR2 belongs to the LCX family of low-voltage CMOS logic devices designed specifically for mixed-voltage system interfacing, bus isolation, and high-reliability embedded control applications.
FAQ
What is the maximum supply voltage for MC74LCX125DTR2?
The MC74LCX125DTR2 supports a DC supply voltage (VCC) from −0.5 V to +6.5 V absolute maximum, with recommended operation from 1.65 V to 5.5 V. Exceeding 5.5 V in normal use risks reliability degradation, though the 6.5 V rating accommodates transient overshoots per JEDEC guidelines. Always maintain VCC within 1.65–5.5 V for guaranteed functional performance and lifetime reliability of the MC74LCX125DTR2.
Does MC74LCX125DTR2 support hot-swap or live insertion?
Yes, the MC74LCX125DTR2 supports live insertion and withdrawal due to its IOFF specification, which guarantees high-impedance outputs when VCC = 0 V. This prevents back-driving of powered buses during board replacement. Combined with 5 V-tolerant inputs and robust ESD protection (>2000 V HBM), the MC74LCX125DTR2 is explicitly rated for hot-swap applications in telecom and industrial backplanes.
What is the output drive capability of MC74LCX125DTR2 at 3.0 V?
At VCC = 3.0 V, the MC74LCX125DTR2 delivers ±24 mA balanced sink and source current per output, measured under standard test conditions. This drive strength ensures reliable signal integrity across typical PCB trace impedances and fan-out to multiple TTL inputs. The MC74LCX125DTR2 maintains this performance across −40 °C to +125 °C, making it suitable for demanding industrial and automotive environments.
Is MC74LCX125DTR2 qualified for automotive applications?
Yes, the MC74LCX125DTR2 is AEC-Q100 qualified and PPAP capable, as indicated by the "−Q" suffix in its ordering variant (MC74LCX125DTR2G-Q*). It meets stress testing requirements for temperature cycling, humidity, and ESD specific to automotive electronics, and is approved for use in engine control units, body control modules, and ADAS sensor interfaces where extended temperature operation (−40 °C to +125 °C) is mandatory. The MC74LCX125DTR2 carries full automotive traceability and process control documentation.
How does the 5 V-tolerant input feature work in MC74LCX125DTR2?
The MC74LCX125DTR2 incorporates internal clamping circuitry that allows its inputs to safely accept voltages up to 5.5 V-even when VCC is as low as 1.65 V. This eliminates the need for external level shifters when interfacing with 5 V TTL logic. The VIH/VIL thresholds scale with VCC, ensuring correct logic interpretation across the full supply range. This 5 V-tolerant behavior is fully characterized and guaranteed in the MC74LCX125DTR2 datasheet across all operating temperatures.
MC74LCX125DTR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MC74LCX125DTR2 FAQ
1.How can I place an order for MC74LCX125DTR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX125DTR2 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 MC74LCX125DTR2 reliable?
The price and inventory of MC74LCX125DTR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX125DTR2 is usually 5 days.
3.What payment methods are accepted for MC74LCX125DTR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX125DTR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LCX125DTR2?
MC74LCX125DTR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX125DTR2 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 MC74LCX125DTR2?
For technical support, including MC74LCX125DTR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX125DTR2 requirements.
6.How does Aetrix verify that MC74LCX125DTR2 is sourced from the original manufacturer or authorized distributors?
All MC74LCX125DTR2 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 MC74LCX125DTR2 meets industry standards.
7.What is the process for return or replacement of MC74LCX125DTR2?
All MC74LCX125DTR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX125DTR2, 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 MC74LCX125DTR2 part is unused and in its original packaging.
Return procedure for MC74LCX125DTR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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