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Texas Instruments SN74ACT244IPWRG4Q1
- Part No.:
- SN74ACT244IPWRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ACT244IPWRG4Q1.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,878
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Product details
Overview
SN74ACT244IPWRG4Q1 from Texas Instruments is an automotive-grade octal buffer/driver with 3-state outputs, designed for bus-oriented signal redriving and memory address buffering. It operates from 4.5 V to 5.5 V, supports TTL-compatible inputs up to 5.5 V, delivers ≤9 ns propagation delay at 5 V, and features dual independent output-enable controls (1OE, 2OE) for flexible bus management in engine control units and ADAS domain controllers.
For engineers reviewing the SN74ACT244IPWRG4Q1 datasheet, SN74ACT244IPWRG4Q1 pinout, SN74ACT244IPWRG4Q1 application, or SN74ACT244IPWRG4Q1 equivalent, key selection criteria include its AEC-Q100 qualification, 24 mA output drive capability, high-impedance state control per 4-bit group, and TSSOP-20 packaging optimized for space-constrained automotive PCB layouts.
Technical Context
The SN74ACT244IPWRG4Q1 implements two independent 4-bit noninverting buffer sections, each with dedicated output-enable (OE) input controlling high-impedance state entry/exit. Its ACT logic family ensures CMOS-level power efficiency with TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and rail-to-rail output swing under load.
Functional operation is defined by a simple truth table: when OE is low, Y mirrors A; when OE is high, Y enters high-Z. This enables bidirectional bus isolation, signal hold during controller reset, and transmission line termination without contention-critical for CAN/LIN interface backplanes and sensor hub interconnects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across automotive battery transients (cold crank, load dump). |
| tpd (max) | 9 ns at 5 V - Enables reliable timing in 50–100 MHz digital backplanes and sensor data multiplexing. |
| IOL / IOH | ±24 mA - Drives LED indicators, 50 Ω transmission lines, or multiple CMOS/TTL loads without external buffers. |
| Input Compatibility | TTL-compatible - Interfaces directly with legacy microcontrollers and FPGAs without level-shifting circuitry. |
| Output State Control | Two independent 3-state enables (1OE, 2OE) - Allows selective isolation of two 4-bit data lanes on shared buses. |
| ESD Rating | HBM ±2000 V - Meets AEC-Q100-002 for robustness in assembly and field environments. |
| Operating Temp | −40 °C to +85 °C - Qualified for passenger compartment and engine bay proximity applications. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 6.4 mm body size, 1.2 mm max height, lead pitch 0.65 mm, exposed thermal pad optional per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 19 | Input | Active-low enable for first 4-bit buffer group (1Y1–1Y4); tie high via pullup for power-up high-Z safety. |
| 2OE, 2 | Input | Active-low enable for second 4-bit buffer group (2Y1–2Y4); enables independent bus segment control. |
| 1A1–1A4, 2A1–2A4 (pins 2,4,6,8,11,13,15,17) | Input | Noninverting data inputs for respective Y outputs; accept 0–5.5 V, TTL-compatible thresholds. |
| 1Y1–1Y4, 2Y1–2Y4 (pins 18,16,14,12,3,5,7,9) | Output | 3-state buffered outputs; sink/source ±24 mA; high-Z when corresponding OE is high. |
| VCC, 20 | Power | Single 4.5–5.5 V supply; requires local 0.1 µF bypass capacitor adjacent to pin. |
| GND, 10 | Ground | Reference return path; must be low-impedance connection to minimize ground bounce in switching operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (Grade 3: −40 °C to +85 °C), including humidity testing and board-level reliability validation. |
| Dual independent OE control | Enables selective 4-bit lane isolation on shared buses-reduces contention risk during partial system resets. |
| 9 ns max tpd at 5 V | Supports clean signal integrity in high-speed digital interconnects up to 100 Mbps without added delay compensation. |
| ±24 mA output drive | Directly drives LEDs, 50 Ω transmission lines, or fan-out to ≥10 standard TTL loads without external amplification. |
| TTL-compatible inputs | Accepts 0–5.5 V input voltage range and meets VIH/VIL thresholds of legacy controllers-eliminates need for level shifters. |
Applications
| Engine Control Unit (ECU) Signal Redriving | ADAS Camera Sensor Interface |
|---|---|
Use Scenario: Redriving multiplexed sensor data lines between MCU and analog front-end ICs under EMI-heavy engine bay conditions. IC Role / Device Role / Timing Role: Octal buffer isolating and strengthening SPI/parallel pixel data paths while maintaining precise timing alignment across 8-bit channels. Use Value: Prevents signal degradation over 10–15 cm PCB traces; eliminates need for discrete transistor arrays or higher-power drivers. | Use Scenario: Holding image frame sync signals stable during camera module power sequencing or processor reset cycles. IC Role / Device Role / Timing Role: 3-state driver asserting fixed logic levels on clock/data enable lines until host SoC completes initialization. Use Value: Avoids undefined camera startup states and frame corruption; leverages built-in high-Z mode instead of external pull resistors. |
| Automotive Body Control Module (BCM) Bus Isolation | In-Vehicle Infotainment (IVI) Display Backplane |
Use Scenario: Isolating LIN bus transceiver I/O from microcontroller GPIOs during firmware updates or fault recovery. IC Role / Device Role / Timing Role: Dual-OE octal buffer enabling selective disconnection of two independent 4-bit control/data lanes without interrupting other subsystems. Use Value: Maintains communication continuity on one LIN sub-bus while reprogramming another-improves OTA update reliability. | Use Scenario: Driving parallel RGB interface signals from application processor to TFT-LCD panel with controlled edge rates. IC Role / Device Role / Timing Role: Noninverting buffer providing 24 mA drive strength and <9 ns skew across all 8 data bits to meet display timing setup/hold windows. Use Value: Eliminates timing jitter-induced color artifacts; replaces multiple discrete buffers with single compact TSSOP-20 solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244AQPWRQ1 | Lower VCC range (1.65–5.5 V), 32 mA drive, 6.7 ns tpd, 3.3 V optimized | Better suited for mixed-voltage domains (e.g., 3.3 V MCU + 5 V peripherals); less margin for 5 V-only systems | Select when system uses 3.3 V logic and requires faster switching or lower static current. |
| SN74AHCT244QPWRQ1 | Same 4.5–5.5 V range, 8 mA drive, 10.5 ns tpd, higher noise immunity | Lower drive strength limits use with heavy capacitive loads or long traces; preferred in noisy ignition environments | Select when EMI resilience is prioritized over speed/load drive, and output current ≤8 mA suffices. |
Compared with SN74LVC244AQPWRQ1 and SN74AHCT244QPWRQ1, the SN74ACT244IPWRG4Q1 provides optimal balance of 5 V robustness, 24 mA drive, and 9 ns timing-making it the preferred choice for legacy 5 V automotive subsystems requiring proven reliability and moderate performance.
Availability
SN74ACT244IPWRG4Q1 is available at Aetrix Electronics and suitable for engine control units, ADAS sensor interfaces, and body control modules requiring stable component supply across extended automotive product lifecycles.
Supply support for SN74ACT244IPWRG4Q1 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 electronics, with decades of AEC-Q100 qualification expertise and broad automotive reference design support.
The SN74ACT244IPWRG4Q1 belongs to TI's automotive logic portfolio, engineered specifically for signal integrity, bus isolation, and redriving in harsh-temperature vehicle networks-including powertrain, chassis, and infotainment subsystems.
FAQ
What automotive qualification does SN74ACT244IPWRG4Q1 meet?
The SN74ACT244IPWRG4Q1 is qualified to AEC-Q100 Grade 3 (−40 °C to +85 °C) and includes full stress testing per automotive reliability standards-including temperature cycling, humidity bias HAST, and board-level drop testing. It carries the "Q1" suffix explicitly denoting TI's automotive qualification program, not just industrial grade.
Can SN74ACT244IPWRG4Q1 operate with a 3.3 V supply?
No-SN74ACT244IPWRG4Q1 requires a minimum VCC of 4.5 V and is specified only from 4.5 V to 5.5 V. Applying 3.3 V will result in undefined logic behavior and failure to meet VIH/VIL thresholds. For 3.3 V systems, consider SN74LVC244AQPWRQ1 instead, which supports 1.65–5.5 V operation.
How should unused inputs be handled on SN74ACT244IPWRG4Q1?
All unused inputs on SN74ACT244IPWRG4Q1 must be tied to either VCC or GND-floating inputs cause increased ICC, noise susceptibility, and potential oscillation. TI recommends tying unused A inputs to GND and unused OE inputs to VCC (via pullup) to ensure default high-Z output state during power-up.
What is the maximum capacitive load SN74ACT244IPWRG4Q1 can drive reliably?
Based on switching characteristics and output drive specs, SN74ACT244IPWRG4Q1 reliably drives up to 50 pF load capacitance while maintaining ≤9 ns tpd and clean edges. For heavier loads (>75 pF), add series damping resistors (e.g., 33 Ω) near outputs to suppress ringing-layout guidelines in the datasheet confirm this practice for transmission line driving.
Does SN74ACT244IPWRG4Q1 have integrated ESD protection?
Yes-SN74ACT244IPWRG4Q1 includes on-die ESD protection rated to ±2000 V HBM (per AEC-Q100-002) and ±1000 V CDM (per AEC-Q100-011). This meets automotive assembly and field-use requirements but does not replace board-level TVS diodes for high-energy transients like ISO 7637-2 pulses.
SN74ACT244IPWRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- 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-TSSOP
SN74ACT244IPWRG4Q1 FAQ
1.How can I place an order for SN74ACT244IPWRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT244IPWRG4Q1 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 SN74ACT244IPWRG4Q1 reliable?
The price and inventory of SN74ACT244IPWRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT244IPWRG4Q1 is usually 5 days.
3.What payment methods are accepted for SN74ACT244IPWRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT244IPWRG4Q1 transactions.
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4.How is shipping managed for SN74ACT244IPWRG4Q1?
SN74ACT244IPWRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT244IPWRG4Q1 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 SN74ACT244IPWRG4Q1?
For technical support, including SN74ACT244IPWRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT244IPWRG4Q1 requirements.
6.How does Aetrix verify that SN74ACT244IPWRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74ACT244IPWRG4Q1 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 SN74ACT244IPWRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74ACT244IPWRG4Q1?
All SN74ACT244IPWRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT244IPWRG4Q1, 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 SN74ACT244IPWRG4Q1 part is unused and in its original packaging.
Return procedure for SN74ACT244IPWRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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