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Texas Instruments SN74ABT125QDRG4Q1
- Part No.:
- SN74ABT125QDRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74ABT125QDRG4Q1.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,203
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Product details
Overview
SN74ABT125QDRG4Q1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with independent 3-state outputs, designed for high-noise industrial and vehicle ECUs. It delivers −16-mA high-level and 32-mA low-level output drive, supports hot insertion via Ioff and power-up 3-state, and operates across −40°C to 125°C at 4.5–5.5 V.
For engineers reviewing the SN74ABT125QDRG4Q1 datasheet, SN74ABT125QDRG4Q1 pinout, SN74ABT125QDRG4Q1 application, or SN74ABT125QDRG4Q1 equivalent, key selection criteria include automotive AEC-Q100 qualification, ground-bounce immunity (<1 V VOLP), Ioff-enabled backflow prevention during power-down, and SOIC-14 package compatibility with legacy ABT logic designs.
Technical Context
This device implements four independent noninverting buffers, each controlled by a dedicated active-low output-enable (OE) input. Output states are strictly defined: OE = L enables Y = A; OE = H forces Y = high-impedance regardless of A state.
Its hot-insertion capability relies on two verified circuit features: Ioff limits leakage to ±100 µA when VCC = 0 V and inputs/outputs ≤ 4.5 V, while power-up 3-state ensures outputs remain in high-Z during VCC ramp (Δt/ΔVCC ≤ 200 µs/V), preventing bus contention before system initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation under automotive battery transients and regulated 5-V rail conditions. |
| IOH / IOL | −16 mA / 32 mA - Enables direct driving of multiple TTL loads or stubbed transmission lines without external buffering. |
| tPLH / tPHL | 1 ns to 6.2 ns - Supports >100-MHz bus toggle rates in short-trace applications with tight timing margins. |
| VOL @ IOL=32 mA | 0.55 V max - Guarantees solid logic-low margin (>0.9 V noise immunity) into standard TTL inputs. |
| Ioff @ VCC=0 | ±100 µA - Prevents damaging back-current flow during live board insertion or partial power-down sequences. |
| Operating Temp | −40°C to 125°C - Validated for engine bay, transmission control, and ADAS ECU environments per AEC-Q100 Grade 1. |
| ESD HBM | 2000 V - Meets automotive system-level ESD robustness requirements without additional protection circuitry. |
Pinout & Package
SN74ABT125QDRG4Q1 is housed in a 14-pin SOIC (D) package, 3.90 mm wide, 1.75 mm max height, with 1.27 mm pitch and NiPdAu lead finish (MSL Level-1). Pin 1 identifier is marked with a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (OE) | Active-low output enable | Each controls one buffer; tie to VCC via pullup resistor to ensure high-Z during power-up. |
| 2, 5, 9, 12 (A) | Buffer input | Noninverting data input; must be held at VCC or GND if unused to prevent floating CMOS node issues. |
| 3, 6, 8, 11 (Y) | 3-state buffered output | Drives bus line only when OE = L; enters high-Z immediately upon OE = H transition. |
| 7 (GND) | Ground reference | Primary return path for all output current and internal logic; requires low-inductance PCB connection. |
| 14 (VCC) | Power supply | 5-V nominal supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified - certified for use in safety-critical vehicle subsystems including powertrain and chassis control. |
| Output ground bounce | VOLP < 1 V at VCC = 5 V - Minimizes signal corruption during simultaneous output switching in dense PCB layouts. |
| Latch-up immunity | Exceeds 500 mA per JESD17 - Eliminates risk of destructive latch-up under transient overvoltage or ESD stress. |
| Input clamp protection | −18 mA IIK rating - Safely clamps negative transients below −0.5 V without damage or logic upset. |
| Power-up 3-state | Guaranteed high-Z during VCC ramp - Removes need for external reset sequencing or bus arbitration logic. |
Applications
| Engine Control Unit (ECU) Data Bus Isolation | Advanced Driver Assistance Systems (ADAS) Sensor Interface |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from noisy CAN/LIN transceiver buses in engine management modules. IC Role / Device Role / Timing Role: Bidirectional bus buffer with configurable 3-state control per channel to prevent signal contention during MCU reset or sleep transitions. Use Value: Enables clean hot-swap of communication modules without disrupting main ECU operation or inducing ground bounce on shared power rails. | Use Scenario: Level-shifting and buffering camera or radar sensor data streams to SoC image processors in ADAS domain controllers. IC Role / Device Role / Timing Role: Noninverting voltage translator and drive booster between 3.3-V sensors and 5-V tolerant processor I/O banks. Use Value: Delivers 32-mA sink current to meet fast edge-rate requirements of MIPI CSI-2 parallel clock/data lanes while maintaining AEC-Q100 compliance. |
| Transmission Control Module (TCM) Diagnostic Port | Electric Power Steering (EPS) Motor Driver Interface |
Use Scenario: Enabling/disabling diagnostic communication paths between TCM and service tools via ISO 9141 or K-line protocols. IC Role / Device Role / Timing Role: Controlled bus gate that isolates diagnostic pins during normal operation and activates only during service mode. Use Value: Prevents unintended activation of diagnostic functions during vehicle runtime, improving functional safety and reducing EMI exposure. | Use Scenario: Interfacing MCU PWM outputs to high-current gate drivers in EPS motor control stages. IC Role / Device Role / Timing Role: Robust level translator and current amplifier for 5-V logic signals driving isolated half-bridge driver enable inputs. Use Value: Ensures reliable turn-on/turn-off timing of MOSFETs under load dump conditions where supply dips to 4.5 V but must sustain full 32-mA drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125AQDRQ1 | Lower drive (−24/24 mA), 1.65–5.5 V supply, no ground-bounce spec | Suitable for lower-power infotainment interfaces; lacks VOLP validation for high-noise engine bays | Select when cost and power efficiency outweigh peak drive and ground-bounce immunity needs. |
| SN74ABT244QDRG4Q1 | Octal configuration, identical ABT family specs, same SOIC-20 package | Used where 8-channel isolation is required; not pin-compatible due to different pin count and layout | Choose for higher channel density in new designs where PCB real estate allows SOIC-20 footprint. |
Compared with SN74ABT125QDRG4Q1, the SN74LVC125AQDRQ1 trades off ground-bounce immunity and drive strength for wider voltage range and lower static current, while the SN74ABT244QDRG4Q1 offers double the channel count in a larger package-neither is pin-compatible, requiring layout revision for substitution.
Availability
SN74ABT125QDRG4Q1 is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS sensor interfacing, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ABT125QDRG4Q1 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade ICs, with decades of experience in high-reliability timing, interface, and logic solutions.
The SN74ABT125QDRG4Q1 belongs to TI's automotive ABT logic family, engineered specifically for noise-immune, hot-pluggable bus interfacing in harsh-temperature vehicle subsystems where signal integrity and fail-safe behavior are critical.
FAQ
What is the maximum operating temperature range for SN74ABT125QDRG4Q1?
The SN74ABT125QDRG4Q1 is rated for continuous operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for under-hood automotive applications such as engine control units and transmission control modules. This range is validated across all electrical parameters including VOH, VOL, and propagation delay.
Does SN74ABT125QDRG4Q1 support hot insertion, and how is it implemented?
Yes, SN74ABT125QDRG4Q1 supports hot insertion through two integrated features: Ioff circuitry limits current backflow to ±100 µA when VCC = 0 V, and power-up 3-state holds all outputs in high-impedance during VCC ramp-up. These features eliminate bus contention and prevent damage during live board replacement in modular automotive systems.
What is the recommended pull-up resistor value for OE pins on SN74ABT125QDRG4Q1?
The minimum pull-up resistor value for OE pins on SN74ABT125QDRG4Q1 is determined by the current-sinking capability of the driver controlling OE. TI recommends using a resistor no larger than 10 kΩ to ensure reliable high-Z entry during power-up; typical values range from 4.7 kΩ to 10 kΩ when driven by standard 5-V CMOS logic.
How does SN74ABT125QDRG4Q1 differ from commercial-grade SN74ABT125N?
SN74ABT125QDRG4Q1 differs from SN74ABT125N in three key ways: it carries AEC-Q100 Grade 1 qualification, uses enhanced process screening for automotive reliability, and is tested across −40°C to +125°C (vs. 0°C to +70°C for the commercial version). The Q1 suffix denotes full automotive qualification-not just temperature extension.
Can SN74ABT125QDRG4Q1 drive standard TTL loads directly?
Yes, SN74ABT125QDRG4Q1 can drive standard TTL loads directly: its −16-mA IOH and 32-mA IOL ratings exceed the −0.4-mA/16-mA requirements of legacy TTL inputs. At VCC = 5 V and IOL = 16 mA, VOL remains ≤0.55 V, ensuring >0.9 V noise margin-making it suitable for mixed-logic systems without level-shifter circuitry.
SN74ABT125QDRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 16mA, 32mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74ABT125QDRG4Q1 FAQ
1.How can I place an order for SN74ABT125QDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT125QDRG4Q1 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 SN74ABT125QDRG4Q1 reliable?
The price and inventory of SN74ABT125QDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT125QDRG4Q1 is usually 5 days.
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SN74ABT125QDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT125QDRG4Q1 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 SN74ABT125QDRG4Q1?
For technical support, including SN74ABT125QDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT125QDRG4Q1 requirements.
6.How does Aetrix verify that SN74ABT125QDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74ABT125QDRG4Q1 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 SN74ABT125QDRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74ABT125QDRG4Q1?
All SN74ABT125QDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT125QDRG4Q1, 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 SN74ABT125QDRG4Q1 part is unused and in its original packaging.
Return procedure for SN74ABT125QDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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