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Texas Instruments SN74ACT244QWRKSRQ1
- Part No.:
- SN74ACT244QWRKSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SN74ACT244QWRKSRQ1.pdf
- Description:
- AUTOMOTIVE 8-CH, 4.5-V TO 5.5-V
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ACT244QWRKSRQ1 from Texas Instruments is an AEC-Q100 qualified automotive octal buffer/driver with 3-state outputs, operating at 4.5V–5.5V VCC, supporting TTL-compatible inputs up to 5.5V, and delivering ≤9ns propagation delay at 5V. It serves as a bus-oriented transmitter or memory address driver in vehicle control modules requiring high noise immunity and thermal robustness.
For engineers reviewing the SN74ACT244QWRKSRQ1 datasheet, SN74ACT244QWRKSRQ1 pinout, SN74ACT244QWRKSRQ1 application, or SN74ACT244QWRKSRQ1 equivalent, key selection criteria include automotive temperature range (−40°C to +125°C), VQFN-20 package footprint (4.5mm × 2.5mm), dual independent 3-state enable control (1OE/2OE), and guaranteed 24mA output drive capability per channel.
Technical Context
The SN74ACT244QWRKSRQ1 implements two independent 4-bit noninverting buffer sections, each with dedicated output-enable (OE) inputs controlling high-impedance state entry/exit. Its ACT logic family ensures TTL-level input compatibility while maintaining CMOS-level output swing and low static current.
It supports bidirectional signal redriving on shared buses via 3-state outputs, with fast switching (tPLH/tPHL ≤ 10ns typ.) and controlled edge rates (∆t/∆v ≤ 8 ns/V). Thermal performance is optimized for automotive underhood environments, with RθJA = 67.7°C/W in the RKS (VQFN) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - Ensures stable operation across automotive battery transients and cold-crank conditions. |
| Propagation Delay (tpd) | ≤9ns at 5V - Enables reliable timing in high-speed digital subsystems such as body control gateways. |
| Output Drive (IOL/IOH) | ±24mA - Sufficient to directly drive LEDs, transmission lines, or multiple CMOS inputs without external buffers. |
| Input Compatibility | TTL-compatible - Accepts standard 0.8V/2.0V logic thresholds and tolerates inputs up to 5.5V, simplifying interface with legacy controllers. |
| Operating Temperature | −40°C to +125°C - Qualified per AEC-Q100 Grade 1, suitable for engine control units and ADAS domain controllers. |
| ESD Rating (HBM) | ±2000V - Meets automotive ESD robustness requirements for in-vehicle assembly and field reliability. |
| Thermal Resistance (RθJA) | 67.7°C/W - Enables higher power density in compact VQFN layout without forced cooling. |
Pinout & Package
VQFN-20 (RKS) package: 4.5mm × 2.5mm body, 0.5mm pitch, exposed thermal pad, 1.1mm max height. Optimized for space-constrained automotive PCBs with enhanced thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-Low Output Enable | Independent control of Group 1 (Y1–Y4) and Group 2 (Y5–Y8); tie to VCC via pullup for safe power-up high-Z state. |
| 1A1–1A4, 2A1–2A4 | Buffer Inputs | Eight total TTL-compatible data inputs, organized into two 4-bit groups for parallel bus segmentation. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-State Outputs | Octal noninverting outputs; enter high-impedance when respective OE is high, enabling bus sharing. |
| VCC (Pin 20) | Power Supply | Single 4.5–5.5V supply; requires local 0.1µF bypass capacitor adjacent to pin for noise suppression. |
| GND (Pin 10) | Ground Reference | Common return path; connects to PCB ground plane beneath exposed thermal pad for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (−40°C to +125°C), HBM ±2000V - Certified for safety-critical automotive ECUs without additional qualification effort. |
| Dual Independent 3-State Control | Separate 1OE and 2OE pins - Allows selective isolation of two 4-bit data lanes on shared buses, reducing contention risk. |
| High Noise Immunity | VIL = 0.8V, VIH = 2.0V - Robust against voltage fluctuations in noisy vehicle electrical systems. |
| Low Power Consumption | ICC = 4–40µA at 5.5V - Minimizes quiescent current in always-on vehicle networks like LIN or CAN wake-up circuits. |
| Fast Edge Rate Control | ∆t/∆v ≤ 8 ns/V - Limits EMI generation during signal transitions, easing EMC compliance in automotive designs. |
Applications
| Engine Control Unit (ECU) Signal Redriving | Automotive Body Control Module (BCM) Bus Interface |
|---|---|
Use Scenario: Redriving sensor signals (e.g., crankshaft position, camshaft timing) across long PCB traces within an ECU to maintain signal integrity. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state capability isolates upstream MCU GPIOs from trace capacitance and noise coupling. Use Value: ≤9ns tpd preserves timing margins; ±24mA drive compensates for 50pF+ trace loading without external repeaters. |
Use Scenario: Interfacing microcontroller GPIOs to shared I/O buses driving door lock actuators, mirror controls, and lighting drivers in a BCM. IC Role / Device Role / Timing Role: Octal 3-state buffer enables time-multiplexed access to common bus lines by multiple peripherals. Use Value: Dual OE control allows independent gating of two functional sub-buses, preventing signal contention during concurrent operations. |
| ADAS Domain Controller Clock Distribution | Infotainment System LED Indicator Driver |
Use Scenario: Buffering and distributing low-skew clock or sync signals between radar processor, camera SoC, and MCU in a centralized ADAS controller. IC Role / Device Role / Timing Role: High-speed, low-jitter buffer ensuring clean edge delivery to multiple synchronous receivers. Use Value: ACT-family propagation delay matching (<±0.5ns typical) minimizes skew across eight outputs, critical for multi-sensor synchronization. |
Use Scenario: Driving status LEDs (e.g., Bluetooth pairing, Wi-Fi connectivity, system ready) in head unit or display modules. IC Role / Device Role / Timing Role: Direct-current sink/source driver eliminating need for discrete transistor stages. Use Value: 24mA per output supports bright, high-efficiency LEDs at full brightness without external components or thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244AQPWRQ1 | Lower VCC range (1.65–5.5V), 3.3V-optimized; 16ns max tpd at 3.3V; lower drive (±24mA but reduced at <3.3V). | Better suited for mixed-voltage 3.3V/5V systems; less ideal for pure 5V automotive rails with tight timing budgets. | Select when system uses 3.3V logic domains or requires lower static power; verify timing margin with longer tpd. |
| SN74AHCT244QPWRQ1 | Same 4.5–5.5V range and −40°C to +125°C rating; slightly slower (≤10.5ns tpd); identical pinout and drive strength. | Drop-in replacement with minor timing trade-off; AHCT family offers improved noise margin over ACT at cost of speed. | Choose for legacy designs where proven AHCT stability is prioritized over sub-10ns performance; no PCB change required. |
Compared with SN74LVC244AQPWRQ1 and SN74AHCT244QPWRQ1, the SN74ACT244QWRKSRQ1 delivers the fastest propagation delay in the automotive octal buffer family at 5V, making it optimal for timing-critical signal redriving where nanosecond-level latency must be minimized.
Availability
SN74ACT244QWRKSRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS domain controllers, and infotainment systems requiring stable component supply across extended product lifecycles.
Supply support for SN74ACT244QWRKSRQ1 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 automotive electronics.
The SN74ACT244QWRKSRQ1 belongs to TI's automotive logic portfolio, designed specifically for robust signal conditioning, bus interfacing, and redriving in harsh-temperature vehicle subsystems where timing precision and ESD resilience are mandatory.
FAQ
What is the maximum operating temperature for SN74ACT244QWRKSRQ1?
The SN74ACT244QWRKSRQ1 is rated for operation from −40°C to +125°C and is AEC-Q100 Grade 1 qualified. This specification is validated across the full VCC range (4.5V–5.5V) and guarantees electrical performance including propagation delay, output drive, and input thresholds within this thermal envelope. The SN74ACT244QWRKSRQ1 maintains stable 3-state behavior and low leakage even at peak junction temperatures encountered in under-hood applications.
Does SN74ACT244QWRKSRQ1 support 3.3V logic inputs?
Yes, SN74ACT244QWRKSRQ1 accepts TTL-compatible inputs down to 0.8V (VIL) and up to 2.0V (VIH) at VCC = 5V, making it fully compatible with 3.3V CMOS and LVTTL outputs. Its input structure tolerates voltages up to 5.5V regardless of VCC, so 3.3V signals interface safely without level-shifting. However, SN74ACT244QWRKSRQ1 itself requires a 4.5–5.5V supply and does not operate at 3.3V.
What is the recommended bypass capacitor for SN74ACT244QWRKSRQ1?
Texas Instruments recommends a 0.1µF ceramic capacitor placed as close as possible to the VCC pin (Pin 20) of the SN74ACT244QWRKSRQ1, with short, low-inductance traces to the GND pin (Pin 10) and the exposed thermal pad. For systems with high-frequency noise or multiple logic devices, paralleling a 1µF capacitor is acceptable. The SN74ACT244QWRKSRQ1's RKS package benefits from solid ground plane connection under the thermal pad to maximize decoupling effectiveness.
Can SN74ACT244QWRKSRQ1 drive a 50Ω transmission line directly?
Yes, SN74ACT244QWRKSRQ1 can drive a 50Ω transmission line directly in point-to-point configurations. With ±24mA output drive and ≤9ns propagation delay, it meets rise/fall time and impedance-matching requirements for short-to-medium length lines (≤15cm) at frequencies up to ~30MHz. For longer lines or stubbed topologies, series termination (e.g., 33Ω) near the SN74ACT244QWRKSRQ1 output is recommended to suppress reflections.
Is SN74ACT244QWRKSRQ1 pin-compatible with other SN74ACT244-Q1 variants?
Yes, SN74ACT244QWRKSRQ1 shares identical pin numbering and function mapping with all SN74ACT244-Q1 variants (e.g., DGS, PW, DW packages), per TI's standardized 20-pin logic layout. The RKS (VQFN) package maintains the same signal assignment: Pins 1–9 and 11–19 carry identical I/O functions, Pin 10 is GND, and Pin 20 is VCC. Mechanical dimensions differ, but electrical interface and PCB footprint logic are preserved across packages.
SN74ACT244QWRKSRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (2.5x4.5)
SN74ACT244QWRKSRQ1 FAQ
1.How can I place an order for SN74ACT244QWRKSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT244QWRKSRQ1 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 SN74ACT244QWRKSRQ1 reliable?
The price and inventory of SN74ACT244QWRKSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT244QWRKSRQ1 is usually 5 days.
3.What payment methods are accepted for SN74ACT244QWRKSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT244QWRKSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ACT244QWRKSRQ1?
SN74ACT244QWRKSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT244QWRKSRQ1 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 SN74ACT244QWRKSRQ1?
For technical support, including SN74ACT244QWRKSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT244QWRKSRQ1 requirements.
6.How does Aetrix verify that SN74ACT244QWRKSRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74ACT244QWRKSRQ1 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 SN74ACT244QWRKSRQ1 meets industry standards.
7.What is the process for return or replacement of SN74ACT244QWRKSRQ1?
All SN74ACT244QWRKSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT244QWRKSRQ1, 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 SN74ACT244QWRKSRQ1 part is unused and in its original packaging.
Return procedure for SN74ACT244QWRKSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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