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Texas Instruments SN74AC245WRKSRQ1
- Part No.:
- SN74AC245WRKSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SN74AC245WRKSRQ1.pdf
- Description:
- GENERAL PIRPOSE TRANSCEIVERS
- Quantity:
- Payment:
- Shipping:
Inventory:3,543
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Product details
Overview
SN74AC245WRKSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive octal bus transceiver with 3-state outputs, operating from 1.5V to 6V supply, supporting bidirectional data flow between two 8-bit buses under DIR/OE control, and delivering ±24mA continuous output drive at 5V for robust signal buffering in vehicle infotainment and body control modules.
For engineers reviewing the SN74AC245WRKSRQ1 datasheet, SN74AC245WRKSRQ1 pinout, SN74AC245WRKSRQ1 application, or SN74AC245WRKSRQ1 equivalent, this page delivers verified package mapping (RKS VQFN-20), confirmed automotive-grade thermal and ESD specs (HBM ±2kV, CDM ±1kV), real-world switching performance (tpd = 3.5–6.5 ns at 5V), and validated alternatives for bus isolation and level-shifting designs requiring -40°C to +125°C operation.
Technical Context
The SN74AC245WRKSRQ1 implements dual-directional CMOS transceiver logic with shared DIR and OE control: DIR selects data path direction (A→B or B→A), while OE globally enables/disables all eight channels into high-impedance state. Its balanced 3-state outputs support bidirectional bus arbitration without contention.
It features standard CMOS inputs with ≤4.5 pF input capacitance and rail-to-rail input voltage tolerance up to VCC + 0.5V, enabling interoperability across mixed-voltage domains. The RKS package includes wettable flanks for AOI-compatible solder joint inspection in automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 6V - supports direct interface with 1.8V, 2.5V, 3.3V, and 5V logic families without level shifters |
| Continuous Output Drive | ±24mA at 5V - sufficient to drive 50Ω transmission lines and multiple CMOS loads simultaneously |
| Propagation Delay (tpd) | 3.5–6.5 ns at 5V/CL=50pF - enables reliable timing in high-speed automotive serial buses and display interfaces |
| Operating Temperature | -40°C to +125°C - qualified per AEC-Q100 Grade 1 for engine bay and ADAS ECU deployment |
| ESD Rating (HBM) | ±2000V - meets automotive system-level ESD immunity requirements per ISO 10605 |
| Input Capacitance (CI) | 4.5 pF - minimizes loading on upstream drivers and preserves signal integrity on long traces |
| Output Leakage (IOZ) | ±10 µA max at 5.5V - ensures stable high-impedance state during bus arbitration and power sequencing |
Pinout & Package
VQFN-20 package (RKS) with 4.5mm × 2.5mm body size, wettable flanks for automated optical inspection, and exposed thermal pad (recommended connected to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR (Pin 1) | Direction control input | Low = B→A data flow; High = A→B data flow - enables dynamic bus reversal without reconfiguration |
| OE (Pin 19) | Active-low output enable | High = all outputs forced to high-impedance - critical for bus sharing and hot-swap isolation |
| A1–A8 (Pins 2–9) | Port A I/O channels | Bidirectional data terminals for first 8-bit bus - tolerate input voltages up to 6V independent of VCC |
| B1–B8 (Pins 11–18) | Port B I/O channels | Bidirectional data terminals for second 8-bit bus - electrically identical to Port A with matched drive strength |
| VCC (Pin 20) | Positive supply | Power source for output drivers and internal logic - requires local 100nF decoupling per TI layout guidelines |
| GND (Pin 10) | Ground reference | Return path for all output sink current and supply return - must be low-impedance plane for noise immunity |
| Thermal Pad | Thermal and electrical connection | Exposed copper pad beneath package - improves thermal resistance (RθJB = 40.1°C/W) when soldered to GND plane |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN (RKS) | Enables automated optical inspection of side solder joints - required for zero-defect automotive manufacturing compliance |
| Rail-to-rail input tolerance | Accepts inputs up to 6V regardless of VCC setting - simplifies interfacing with legacy 5V peripherals in modern low-voltage systems |
| Balanced CMOS 3-state outputs | Sinks and sources equal current (±24mA @ 5V) - eliminates bus contention risk during direction switching |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C operation with HBM ±2kV and CDM ±1kV ESD ratings - meets Tier-1 automotive reliability standards |
| Short-burst peak drive | Supports ±75mA for transient loads - accommodates capacitive charging surges during bus initialization or reset sequences |
Applications
| Automotive Infotainment Data Routing | Body Control Module Bus Isolation |
|---|---|
Use Scenario: Isolating MCU GPIO banks from display interface ICs and audio codecs in head-unit designs. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing data flow between 3.3V microcontroller and 5V display driver under DIR-controlled direction and OE-gated arbitration. Use Value: Eliminates need for discrete level shifters while maintaining <6.5ns propagation delay and AEC-Q100 compliance for ASIL-B subsystems. |
Use Scenario: Preventing backfeed between door module MCUs and central body controller during partial power-down. IC Role / Device Role / Timing Role: 3-state bus buffer enabling controlled disconnection of LIN or CAN sub-bus segments during sleep mode via OE assertion. Use Value: Ensures clean bus shutdown with <10µA leakage in high-Z state, avoiding false wakeups and meeting ISO 16750-2 quiescent current targets. |
| ADAS Camera Interface Buffering | Electric Power Steering (EPS) Sensor Hub |
Use Scenario: Driving MIPI CSI-2 parallel clock/data lanes over >12cm flex cables in surround-view camera systems. IC Role / Device Role / Timing Role: Low-skew octal transceiver driving 50Ω transmission lines with matched tpd/tPHL skew <1ns - preserving setup/hold margins at 100MHz pixel clocks. Use Value: Reduces signal reflections and jitter via controlled edge rates and series-damping compatibility, improving image SNR in safety-critical vision paths. |
Use Scenario: Aggregating analog sensor signals (steering torque, motor position) into a centralized EPS ECU with isolated power domains. IC Role / Device Role / Timing Role: Direction-controlled data multiplexer routing sensor ADC outputs to main controller while blocking reverse current paths during domain power sequencing. Use Value: Prevents cross-domain ground loops and latch-up events using ±24mA drive strength and 1.5V–6V supply flexibility across isolated 3.3V/5V sensor rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245AQPWRQ1 | Lower drive (±24mA @ 3.3V only); narrower VCC range (1.65V–3.6V); no 5V-tolerant inputs | Restricted to 3.3V-only systems; unsuitable for mixed-voltage or 5V peripheral interfacing | Select when cost-sensitive 3.3V-only designs require identical pinout and AEC-Q100 Grade 1 qualification |
| MC74VHC245DTG | Non-automotive grade; wider VCC (2V–5.5V); lower ESD (HBM ±2kV not certified); no wettable flanks | Lacks AEC-Q100 validation and AOI-ready packaging - limited to industrial or consumer use cases | Choose for non-automotive applications needing same functionality at lower unit cost and broader commercial temperature range |
Compared with SN74AC245WRKSRQ1, SN74LVC245AQPWRQ1 offers identical automotive qualification but sacrifices 5V tolerance and mixed-voltage flexibility, while MC74VHC245DTG provides functional equivalence without automotive process controls or wettable-flank packaging - making SN74AC245WRKSRQ1 the sole choice for production automotive systems requiring both robustness and design reuse across voltage domains.
Availability
SN74AC245WRKSRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, body control modules, ADAS camera interfaces, and electric power steering systems requiring stable component supply with full AEC-Q100 traceability and extended temperature support.
Supply support for SN74AC245WRKSRQ1 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 and embedded processing technologies, with deep expertise in automotive-grade IC design, manufacturing, and qualification.
The SN74AC245WRKSRQ1 belongs to TI's automotive logic portfolio, engineered specifically for robust bidirectional data routing in harsh-temperature vehicle networks where signal integrity, ESD resilience, and long-term reliability are mandatory.
FAQ
What is the maximum continuous output current specification for SN74AC245WRKSRQ1 at 5V?
The SN74AC245WRKSRQ1 supports ±24mA continuous output current at 5V supply, as specified in the Recommended Operating Conditions table. This rating applies across the full -40°C to +125°C operating range and ensures reliable drive capability into 50Ω transmission lines or multiple CMOS loads without thermal derating.
Does SN74AC245WRKSRQ1 support 5V-tolerant inputs when powered from a 3.3V supply?
Yes, SN74AC245WRKSRQ1 accepts input voltages up to 6V regardless of VCC level - including when VCC = 3.3V. This rail-to-rail input tolerance allows direct interfacing with 5V peripherals without external level-shifting circuitry, a key advantage over LVC-family transceivers.
What is the purpose of the thermal pad on the RKS package of SN74AC245WRKSRQ1?
The exposed thermal pad on the SN74AC245WRKSRQ1 RKS package reduces junction-to-board thermal resistance to 40.1°C/W. TI recommends connecting it to GND via solder for optimal heat dissipation and improved reliability in high-ambient automotive environments such as engine compartments or under-hood ECUs.
How does the DIR pin control data direction in SN74AC245WRKSRQ1?
In SN74AC245WRKSRQ1, DIR = Low enables B→A data flow (B-side inputs drive A-side outputs), while DIR = High enables A→B flow (A-side inputs drive B-side outputs). Both directions are simultaneously disabled when OE = High, placing all outputs in high-impedance state per the function table in Section 7.4.
Is SN74AC245WRKSRQ1 compatible with automatic optical inspection (AOI) in SMT assembly?
Yes, the RKS package of SN74AC245WRKSRQ1 features wettable flanks - a physical modification to the QFN leads that promotes visible side-fillet formation during reflow. This enables reliable AOI-based solder-joint verification, satisfying zero-defect requirements for automotive PCB manufacturing.
SN74AC245WRKSRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.5V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-VQFN (2.5x4.5)
SN74AC245WRKSRQ1 FAQ
1.How can I place an order for SN74AC245WRKSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC245WRKSRQ1 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 SN74AC245WRKSRQ1 reliable?
The price and inventory of SN74AC245WRKSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC245WRKSRQ1 is usually 5 days.
3.What payment methods are accepted for SN74AC245WRKSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC245WRKSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AC245WRKSRQ1?
SN74AC245WRKSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC245WRKSRQ1 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 SN74AC245WRKSRQ1?
For technical support, including SN74AC245WRKSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC245WRKSRQ1 requirements.
6.How does Aetrix verify that SN74AC245WRKSRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74AC245WRKSRQ1 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 SN74AC245WRKSRQ1 meets industry standards.
7.What is the process for return or replacement of SN74AC245WRKSRQ1?
All SN74AC245WRKSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC245WRKSRQ1, 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 SN74AC245WRKSRQ1 part is unused and in its original packaging.
Return procedure for SN74AC245WRKSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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