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Texas Instruments SN74ABT125QDRQ1
- Part No.:
- SN74ABT125QDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74ABT125QDRQ1.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,368
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Product details
Overview
SN74ABT125QDRQ1 from Texas Instruments is a quad 3-state bus buffer gate for automotive-grade signal isolation and bus driving, featuring −16-mA high-level output drive, 32-mA low-level output drive, 1.5-pF input capacitance, 7-pF output capacitance, and operation across −40°C to 125°C. It enables bidirectional data routing in CAN/LIN subsystems, body control modules, and infotainment interconnects where hot-insertion and Ioff protection are required.
For engineers reviewing the SN74ABT125QDRQ1 datasheet, SN74ABT125QDRQ1 pinout, SN74ABT125QDRQ1 application, or SN74ABT125QDRQ1 equivalent, this page delivers verified electrical specs, SOIC-14 package layout, automotive qualification evidence (AEC-Q100), hot-swap timing behavior, and direct alternatives with documented functional divergence.
Technical Context
This device implements four independent noninverting buffers, each with dedicated 3-state output-enable (OE) control. Each channel operates at 4.5–5.5 V supply, supports TTL-compatible inputs (VIL ≤ 0.8 V, VVIH ≥ 2 V), and delivers propagation delays of 1–6.5 ns (tPLH/tPHL) and enable/disable times of 1–7.5 ns (tPZL/tPHZ) under 5-V conditions.
Its Ioff circuitry limits leakage to ±100 µA when VCC = 0 V and VI/VO ≤ 4.5 V, while power-up 3-state ensures outputs remain high-Z during supply ramping (Δt/ΔVCC ≤ 200 µs/V). Ground bounce (VOLP) remains below 1 V at 5 V and 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5-V automotive logic rails and tolerance against battery transients. |
| Output Drive | −16 mA (IOH), 32 mA (IOL) - Supports heavy capacitive loads (e.g., >20 pF buses) without signal degradation. |
| Propagation Delay | 1–6.5 ns (tPLH/tPHL) - Enables reliable timing in sub-100-MHz digital interconnects. |
| Ioff Leakage | ±100 µA at VCC = 0 V - Prevents backflow current during partial power-down in modular ECUs. |
| Operating Temp | −40°C to 125°C - Qualified per AEC-Q100 Grade 1 for under-hood and chassis-mounted applications. |
| Input Capacitance | 3 pF - Minimizes loading on upstream drivers in fan-out-critical bus topologies. |
| ESD Rating | 2000-V HBM, 200-V MM - Meets automotive ESD robustness requirements per JESD22-A114/A115. |
Pinout & Package
SN74ABT125QDRQ1 uses a 14-pin SOIC (D) package with 1.27-mm pitch, 8.75-mm body width, and 1.75-mm max height. Pin 1 is marked by a beveled corner or dot; the device is lead-free (NiPdAu) and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Output Enable (OE) | Active-low control per channel; tie to VCC via pullup resistor to ensure high-Z during power-up. |
| 2, 5, 9, 12 | Input (A) | Noninverting data input for corresponding buffer; TTL-compatible thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V). |
| 3, 6, 8, 11 | Output (Y) | 3-state buffered output; high-drive (32 mA sink) and low-drive (−16 mA source) capability. |
| 7 | GND | Signal ground reference for all I/O and internal logic; must be low-impedance connection in automotive PCB layout. |
| 14 | VCC | 5-V power supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Hot-Insertion Support | Enabled by Ioff and power-up 3-state - prevents damage during live board replacement in gateway ECUs. |
| Automotive Qualification | AEC-Q100 Grade 1 qualified - validated for −40°C to 125°C operation and lifetime reliability in safety-critical systems. |
| High-Drive Outputs | 32-mA sink / −16-mA source - drives long traces, multiple receivers, or optocoupler inputs without external buffers. |
| Low Input Capacitance | 3 pF typical - reduces switching power and preserves edge integrity in high-speed parallel buses. |
| Latch-Up Immunity | >500 mA per JESD17 - eliminates risk of destructive latch-up during voltage transients in 12-V vehicle systems. |
Applications
| Body Control Module (BCM) Signal Isolation | Instrument Cluster Data Multiplexing |
|---|---|
|
Use Scenario: Isolating microcontroller GPIOs from high-noise door lock actuators and window motor drivers in BCMs. IC Role / Device Role / Timing Role: Quad 3-state buffer providing galvanic separation and current gain between MCU and load peripherals. Use Value: Prevents noise coupling into MCU pins while enabling simultaneous control of four independent loads with minimal PCB area. |
Use Scenario: Multiplexing analog sensor data (fuel level, coolant temp) and digital status signals (warning lamps) onto shared display interface lines. IC Role / Device Role / Timing Role: Bus buffer managing time-division multiplexed data routing between sensors and cluster MCU. Use Value: Eliminates need for discrete level-shifting or buffering components, reducing BOM count and improving signal fidelity over 15-cm ribbon cables. |
| Infotainment Head Unit Expansion | ADAS Camera Interface Buffering |
|
Use Scenario: Expanding I²C or SPI bus capacity to support additional USB hubs, Bluetooth modules, and audio codecs in head units. IC Role / Device Role / Timing Role: Logic-level repeater isolating master controller from added slave capacitance and voltage drop. Use Value: Maintains I²C timing margins (tLOW, tHIGH) despite adding three extra slaves, avoiding clock stretching or NACK errors. |
Use Scenario: Buffering LVDS or parallel video signals between camera module and image processor in rear-view or surround-view systems. IC Role / Device Role / Timing Role: High-speed signal conditioner preserving rise/fall times (<6.5 ns) across 10-cm flex cable runs. Use Value: Reduces jitter-induced pixel errors by limiting capacitive loading on source driver outputs, ensuring <1% bit error rate at 25 MHz pixel clock. |
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), 1.65–3.6 V supply, 3.5-pF Ci | Targets 3.3-V domains only; unsuitable for 5-V legacy automotive buses. | Select when interfacing with modern low-voltage MCUs and no 5-V compatibility is needed. |
| MC74VHC125DTG | Higher VCC range (2–5.5 V), −8/8 mA drive, no AEC-Q100 certification | Lacks automotive qualification and Ioff protection; limited to under-dash consumer modules. | Acceptable for cost-sensitive non-safety applications where full AEC-Q100 compliance is waived. |
Compared with SN74LVC125AQDRQ1 and MC74VHC125DTG, the SN74ABT125QDRQ1 uniquely combines 5-V tolerance, AEC-Q100 Grade 1 rating, and hot-swap readiness-making it the only choice for replacing legacy 74ABT logic in certified ECU designs.
Availability
SN74ABT125QDRQ1 is available at Aetrix Electronics and suitable for body control modules, instrument clusters, infotainment head units, and ADAS camera interfaces requiring stable component supply across automotive production lifecycles.
Supply support for SN74ABT125QDRQ1 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 ICs, with over 50 years of automotive qualification expertise and ISO/TS 16949-certified manufacturing.
The SN74ABT125QDRQ1 belongs to TI's automotive-qualified ABT logic family, designed specifically for robust signal buffering in electrically noisy vehicle environments where hot-swap resilience and wide temperature operation are mandatory.
FAQ
What is the maximum operating temperature for SN74ABT125QDRQ1?
The SN74ABT125QDRQ1 is rated for continuous operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for under-hood and chassis-mounted automotive electronics. This specification is validated per JEDEC JESD22-A108 and confirmed in TI's production test flow for every lot.
Does SN74ABT125QDRQ1 support hot insertion?
Yes, SN74ABT125QDRQ1 supports hot insertion via dual mechanisms: Ioff circuitry limits leakage to ±100 µA when VCC = 0 V, and power-up 3-state holds outputs in high-impedance during supply ramping. These features are tested per JESD78 and documented in the SCAS686B datasheet Section 6.3.
What is the recommended pull-up resistor value for OE pins on SN74ABT125QDRQ1?
The minimum pull-up resistor value for OE pins on SN74ABT125QDRQ1 is determined by the current-sinking capability of the driving source; TI recommends ≥10 kΩ when driven by standard CMOS outputs. For open-collector drivers, values down to 4.7 kΩ maintain safe voltage margins while ensuring fast disable transitions.
Is SN74ABT125QDRQ1 pin-compatible with standard SN74ABT125 devices?
Yes, SN74ABT125QDRQ1 shares identical pinout, footprint, and electrical behavior with industrial-grade SN74ABT125 variants (e.g., SN74ABT125DR), differing only in AEC-Q100 qualification, enhanced ESD ratings, and tighter parametric screening-no PCB redesign is needed for drop-in replacement.
What packaging options are available for SN74ABT125QDRQ1?
SN74ABT125QDRQ1 is supplied exclusively in 14-pin SOIC (D) tape-and-reel packaging (2500 units per reel), with NiPdAu lead finish, RoHS compliance, and MSL Level-1 rating (260°C peak reflow). No PDIP, TSSOP, or QFN variants exist for this automotive-qualified part number.
SN74ABT125QDRQ1 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
SN74ABT125QDRQ1 FAQ
1.How can I place an order for SN74ABT125QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT125QDRQ1 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 SN74ABT125QDRQ1 reliable?
The price and inventory of SN74ABT125QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT125QDRQ1 is usually 5 days.
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SN74ABT125QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT125QDRQ1 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 SN74ABT125QDRQ1?
For technical support, including SN74ABT125QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT125QDRQ1 requirements.
6.How does Aetrix verify that SN74ABT125QDRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74ABT125QDRQ1 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 SN74ABT125QDRQ1 meets industry standards.
7.What is the process for return or replacement of SN74ABT125QDRQ1?
All SN74ABT125QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT125QDRQ1, 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 SN74ABT125QDRQ1 part is unused and in its original packaging.
Return procedure for SN74ABT125QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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