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onsemi MC74VHC1G125DT1G
- Part No.:
- MC74VHC1G125DT1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MC74VHC1G125DT1G.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 5TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MC74VHC1G125DT1G from onsemi is a single noninverting 3-state buffer IC designed for level-shifting and bus isolation in low-voltage digital systems. It operates from 2.0 V to 5.5 V, delivers 3.5 ns typical propagation delay at 5 V, supports ±8 mA output drive at 3.0 V, and features over-voltage tolerant inputs/outputs up to 5.5 V-enabling safe interfacing between 3 V and 5 V logic domains in portable instrumentation and industrial control I/O modules.
For engineers reviewing the MC74VHC1G125DT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its CMOS-level input thresholds (VIH = 3.15 V min @ VCC = 4.5 V), IOFF partial power-down protection, SC-74A package footprint compatibility, and guaranteed tri-state leakage < ±2.5 µA at 5.5 V.
Technical Context
The MC74VHC1G125DT1G implements a three-stage buffered architecture with a controlled 3-state output stage that ensures high noise immunity and stable signal integrity during bus contention. Its input structure tolerates voltages up to 5.5 V independent of VCC, allowing direct connection to 5 V signals while powered from 3 V or 2.5 V rails.
Output structures include protection against back-driving when VCC = 0 V and tolerate output voltages exceeding VCC-critical for hot-swap and battery-backup scenarios. The device meets AEC-Q100 Grade 1 requirements when ordered with −Q suffix, though MC74VHC1G125DT1G itself is standard industrial grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 5.5 V - enables operation across 2.5 V, 3.3 V, and 5 V logic families without level translators. |
| tPD (typ) | 3.5 ns at VCC = 4.5–5.5 V, CL = 15 pF - supports >100 MHz data rates in short-bus applications. |
| IOFF Leakage | ≤ 10 µA at VCC = 0 V - prevents current backflow during partial power-down, protecting upstream drivers. |
| Input Voltage Tolerance | −0.5 V to +5.5 V - allows safe 5 V signal injection into 3 V-powered systems without external clamping. |
| Output Drive | ±8 mA at VCC = 3.0 V - sufficient to drive 10–15 pF loads with <1 ns edge degradation in compact PCB layouts. |
| IOZ Leakage | ±2.5 µA max at VCC = 5.5 V - ensures minimal bus loading in high-impedance tri-state mode for multi-drop buses. |
| Operating Temp | −55 °C to +125 °C - qualified for extended industrial environments including motor control enclosures and outdoor telemetry nodes. |
Pinout & Package
MC74VHC1G125DT1G is packaged in SC-74A (Case 318BQ), a 5-pin surface-mount package measuring 3.00 mm × 1.50 mm × 0.95 mm with 0.95 mm lead pitch. Pin 1 is marked by a dot or beveled edge; orientation follows JEDEC standard for tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable input | Active-low control: drives Y high-impedance when high; enables noninverting pass-through when low. |
| 2 (A) | Data input | CMOS-level threshold input (VIH ≥ 3.15 V @ 4.5 V); accepts 5 V signals safely regardless of VCC. |
| 3 (GND) | Ground reference | Return path for all internal logic and output stages; must be low-inductance connection for noise immunity. |
| 4 (Y) | Buffered output | Noninverting 3-state output with ±8 mA drive; tri-states when OE = high, sinks/sources up to 25 mA absolute max. |
| 5 (VCC) | Supply voltage | Primary power rail (2.0–5.5 V); decoupling capacitor (0.1 µF) required within 3 mm for stable AC performance. |
Key Features
| Feature | Design Value |
|---|---|
| Over-voltage tolerant I/O | Inputs and outputs withstand −0.5 V to +5.5 V regardless of VCC - eliminates need for external clamping diodes in mixed-voltage systems. |
| IOFF partial power-down | Input and output leakage ≤10 µA when VCC = 0 V - prevents parasitic power paths during system sleep or hot-swap events. |
| Low propagation delay | 3.5 ns typical tPLH/tPHL at 5 V - enables timing-critical functions such as clock distribution gating and ADC sample strobe conditioning. |
| Small-footprint packaging | SC-74A (3.0 × 1.5 mm) - saves board space in space-constrained applications like wearable sensor nodes and modular PLC I/O cards. |
| Wide temperature range | −55 °C to +125 °C operation - supports deployment in under-hood automotive ECUs, industrial motor drives, and outdoor wireless gateways. |
Applications
| Industrial Sensor Interface | Portable Instrumentation Bus |
|---|---|
|
Use Scenario: Isolating analog-to-digital converter (ADC) digital control lines from noisy microcontroller GPIOs in a handheld multimeter. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating SPI CS and SCLK lines; enables clean signal routing without crosstalk-induced sampling errors. Use Value: 3.5 ns propagation delay preserves setup/hold timing margins; IOFF protection prevents back-powering the ADC during MCU sleep cycles. |
Use Scenario: Level-shifting UART TX/RX signals between a 3.3 V Bluetooth module and a legacy 5 V RS-232 transceiver in a field-configurable data logger. IC Role / Device Role / Timing Role: Bidirectional voltage translation via separate enable-controlled buffers on TX and RX paths. Use Value: 5.5 V input tolerance allows direct connection to 5 V transceiver outputs; CMOS thresholds ensure reliable recognition of 3.3 V logic levels. |
| Motor Control I/O Expansion | Hot-Swappable Module Backplane |
|
Use Scenario: Driving optocoupler inputs for isolated gate drivers in a 3-phase inverter control board with shared 24 V supply and 3.3 V logic domain. IC Role / Device Role / Timing Role: Buffering PWM enable signals from FPGA to high-side driver inputs; tri-stated during fault shutdown. Use Value: ±8 mA drive capability directly sources optocoupler LEDs; VCC-independent input tolerance avoids level-shifter components. |
Use Scenario: Enabling/disabling communication lines between a main controller and hot-pluggable sensor modules in an industrial automation rack. IC Role / Device Role / Timing Role: Tri-state isolation gate on I²C SDA/SCL lines; OE tied to module presence detection signal. Use Value: IOFF protection prevents power leakage when module is removed; 5.5 V tolerance accommodates residual bus voltage during insertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar noninverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DBVR | TTL-compatible VIH (2.0 V min @ 3.3 V), slightly higher ICC (max 10 µA vs. 40 µA), same SC-74A package. | Better suited for 3.3 V-only systems with legacy TTL interface requirements; lacks 5.5 V input tolerance. | Select SN74LVC1G125DBVR only if VIH compatibility with older 3.3 V peripherals is critical and 5 V signal exposure is absent. |
| 74AUP1G125GW,125 | Lower ICC (0.9 µA typ), wider VCC range (0.8–3.6 V), but max VIO = 3.6 V - no 5 V tolerance. | Optimized for ultra-low-power battery-operated devices; unsuitable for mixed 3 V/5 V interfacing. | Choose 74AUP1G125GW,125 for sub-µA standby current in energy-harvesting sensors where 5 V signals never appear. |
Compared with SN74LVC1G125DBVR and 74AUP1G125GW,125, the MC74VHC1G125DT1G uniquely combines 5.5 V input tolerance with industrial temperature range and SC-74A footprint-making it the only option among the three capable of robust 3 V/5 V domain bridging without external protection circuitry.
Availability
MC74VHC1G125DT1G is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation buses, and motor control I/O expansion requiring stable component supply across extended temperature ranges and mixed-voltage designs.
Supply support for MC74VHC1G125DT1G 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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74VHC1G125DT1G belongs to the VHC (Very High Speed CMOS) logic family, engineered for low-power, high-speed digital interfacing in space- and power-constrained embedded systems.
FAQ
What is the maximum input voltage the MC74VHC1G125DT1G can tolerate?
The MC74VHC1G125DT1G supports DC input voltages from −0.5 V to +5.5 V, independent of VCC level. This over-voltage tolerance allows safe connection of 5 V signals to the device even when powered from 2.0 V or 3.3 V supplies-eliminating the need for external clamping diodes in mixed-voltage interfaces.
Does the MC74VHC1G125DT1G support partial power-down operation?
Yes, the MC74VHC1G125DT1G features IOFF circuitry that limits input and output leakage current to ≤10 µA when VCC = 0 V. This prevents unintended current flow through the device during system sleep or hot-swap events, protecting both upstream and downstream circuitry in modular or battery-backed systems.
What is the typical propagation delay of the MC74VHC1G125DT1G at 3.3 V supply?
At VCC = 3.3 V and CL = 15 pF, the MC74VHC1G125DT1G exhibits a typical propagation delay (tPLH/tPHL) of 4.5 ns, with a maximum of 9.5 ns over the full operating temperature range (−55 °C to +125 °C). This ensures reliable timing in high-speed digital control loops and data acquisition paths.
Which package type does the MC74VHC1G125DT1G use?
The MC74VHC1G125DT1G uses the SC-74A package (Case 318BQ), a 5-pin surface-mount outline measuring 3.00 mm × 1.50 mm × 0.95 mm with 0.95 mm lead pitch. It is compatible with standard reflow profiles and offers superior thermal resistance (320 °C/W) compared to smaller UDFN variants.
How does the MC74VHC1G125DT1G differ from the MC74VHC1GT125 variant?
The MC74VHC1G125DT1G uses CMOS-level input thresholds (e.g., VIH = 3.15 V min @ VCC = 4.5 V), while the MC74VHC1GT125 uses TTL-level thresholds (VIH = 2.0 V min @ VCC = 4.5 V). Both share identical output characteristics, package options, and electrical specs otherwise-so the choice depends solely on input compatibility with upstream logic families.
MC74VHC1G125DT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VHC
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
MC74VHC1G125DT1G FAQ
1.How can I place an order for MC74VHC1G125DT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHC1G125DT1G 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 MC74VHC1G125DT1G reliable?
The price and inventory of MC74VHC1G125DT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHC1G125DT1G is usually 5 days.
3.What payment methods are accepted for MC74VHC1G125DT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHC1G125DT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74VHC1G125DT1G?
MC74VHC1G125DT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHC1G125DT1G 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 MC74VHC1G125DT1G?
For technical support, including MC74VHC1G125DT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHC1G125DT1G requirements.
6.How does Aetrix verify that MC74VHC1G125DT1G is sourced from the original manufacturer or authorized distributors?
All MC74VHC1G125DT1G 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 MC74VHC1G125DT1G meets industry standards.
7.What is the process for return or replacement of MC74VHC1G125DT1G?
All MC74VHC1G125DT1G units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHC1G125DT1G, 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 MC74VHC1G125DT1G part is unused and in its original packaging.
Return procedure for MC74VHC1G125DT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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