My Inquiry
My Account
Texas Instruments SN74AC244QWRKSRQ1
- Part No.:
- SN74AC244QWRKSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SN74AC244QWRKSRQ1.pdf
- Description:
- AUTOMOTIVE EIGHT-CHANNEL, 2-V TO
- Quantity:
- Payment:
- Shipping:
Inventory:1,314
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AC244QWRKSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive octal buffer with Schmitt-trigger inputs and dual 4-channel 3-state outputs, operating from 1.5V to 6V supply, delivering ≤6.8ns propagation delay at 5V, ±24mA continuous output drive, and supporting 50Ω transmission line driving - used for signal routing and bus isolation in vehicle body control modules.
For engineers reviewing the SN74AC244QWRKSRQ1 datasheet, SN74AC244QWRKSRQ1 pinout, SN74AC244QWRKSRQ1 application, or SN74AC244QWRKSRQ1 equivalent, key selection criteria include its wettable-flank VQFN-20 (RKS) package, dual independent output-enable control, Schmitt-trigger noise immunity, and automotive-grade thermal/ESD robustness across –40°C to +125°C.
Technical Context
The SN74AC244QWRKSRQ1 implements two independent banks of four non-inverting CMOS buffers, each bank controlled by a dedicated active-low output enable (1OE/2OE). Its Schmitt-trigger inputs provide hysteresis (typ. 0.3–0.5V at 3.3V/5V), enabling reliable operation with slow or noisy signals like switch debouncing or reset hold circuits.
Each output supports true 3-state operation with balanced sourcing/sinking capability: ±24mA continuous at 5V, up to ±75mA in short bursts, and drives 50Ω transmission lines directly. The device meets AEC-Q100-002 (HBM ±2kV) and AEC-Q100-011 (CDM ±1kV) ESD requirements for under-hood automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 6V - enables direct interface with 1.8V, 2.5V, 3.3V, and 5V logic domains without level shifters. |
| Propagation Delay (tpd) | ≤6.8ns at 5V - ensures timing-critical signal buffering in high-speed automotive data paths (e.g., CAN/LIN peripheral interfaces). |
| Output Drive (Continuous) | ±24mA at 5V - sufficient to drive multiple CMOS loads or terminate 50Ω lines without external drivers. |
| Input Hysteresis | Typ. 0.35V at 3.3V, 0.45V at 5V - rejects noise on slow-rising signals such as mechanical switch inputs or reset lines. |
| Operating Temperature | –40°C to +125°C (Grade 1) - qualified for engine bay, powertrain, and ADAS sensor interface applications. |
| ESD Rating | HBM ±2000V, CDM ±1000V - meets automotive system-level ESD immunity requirements per ISO 10605. |
| Package | VQFN-20 (RKS), 4.5mm × 2.5mm with wettable flanks - supports automated optical inspection (AOI) and high-reliability reflow in automotive PCB assembly. |
Pinout & Package
VQFN-20 (RKS) package with exposed thermal pad; 4.5mm × 2.5mm body size; wettable flanks for AOI-compatible solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low bank enable inputs | Independently disable Bank 1 (pins 1A1–1A4 → 1Y1–1Y4) or Bank 2 (2A1–2A4 → 2Y1–2Y4); tie to VCC via pull-up for power-up high-Z safety. |
| 1A1–1A4, 2A1–2A4 | CMOS input channels | Schmitt-trigger inputs accept 0–6V; require termination to VCC/GND when unused to prevent oscillation and excess current. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state buffered outputs | Drive high/low or enter high-impedance state; support ±75mA peak sink/source but require current limiting for sustained >24mA loads. |
| VCC (Pin 20), GND (Pin 10) | Power and reference | Single-supply operation; thermal pad (RKS only) may be connected to GND for improved thermal performance (RθJB = 40.4°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with full electrical characterization, enabling use in engine control units and battery management systems. |
| Dual independent 3-state banks | Enables selective bus isolation - e.g., isolate diagnostic port during normal operation while keeping communication channel active. |
| Schmitt-trigger inputs | Provides ≥0.3V hysteresis to eliminate chatter on debounced switches, reset lines, or low-slew-rate sensor outputs without external RC networks. |
| Wettable flank QFN (RKS) | Ensures reliable side-fillet formation for automated optical inspection (AOI), critical for zero-defect automotive manufacturing compliance. |
| 50Ω transmission line drive | Directly interfaces with controlled-impedance traces in ADAS camera links or infotainment display buses without series termination resistors. |
Applications
| Body Control Module Signal Routing | Instrument Cluster Reset Hold |
|---|---|
|
Use Scenario: Isolating microcontroller GPIOs from high-noise door lock actuators and window motor drivers in BCM PCB layout. IC Role / Device Role / Timing Role: Octal buffer with dual OE control acts as bidirectional signal gate, enabling/disabling 8 parallel control lines based on system mode. Use Value: Prevents backfeed and ground bounce during actuator switching; Schmitt inputs reject EMI-induced glitches on long harness runs. |
Use Scenario: Holding display enable signal stable during MCU reset sequence in digital instrument clusters. IC Role / Device Role / Timing Role: 3-state buffer holds output in last valid state until reset completes, then releases control to new firmware. Use Value: Eliminates display flicker or corruption during boot; ±24mA drive sustains LCD backlight enable without droop. |
| ADAS Camera Interface Buffering | Debounced Vehicle Door Switch Interface |
|
Use Scenario: Driving MIPI CSI-2 clock or control signals over 15cm FR4 traces between SoC and camera module in rear-view systems. IC Role / Device Role / Timing Role: Low-skew buffer with ≤6.8ns tpd preserves signal integrity and meets setup/hold margins for 100MHz+ pixel clocks. Use Value: Enables direct 50Ω line driving without external termination, reducing BOM count and board space in compact camera housings. |
Use Scenario: Conditioning mechanical door ajar switch signals before feeding to vehicle network gateway. IC Role / Device Role / Timing Role: Schmitt-trigger input cleans slow, bouncing switch transitions; 3-state output allows multiplexing onto shared LIN bus line. Use Value: Reduces software debounce overhead; eliminates false door-open alerts caused by contact bounce or vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244AQPWRQ1 | Lower drive (±24mA @ 3.3V only), 1.65–3.6V range, no Schmitt inputs | Not suitable for 5V systems or noisy switch inputs; requires external hysteresis for debouncing | Choose when cost-sensitive 3.3V-only designs prioritize lower ICC (10µA vs. 20µA) and do not need Schmitt inputs. |
| MC74VHC244DTG | Industrial temp (–40°C to +85°C), no AEC-Q100 qualification, same 2–5.5V range and Schmitt inputs | Not approved for automotive safety-critical or under-hood locations requiring Grade 1 qualification | Acceptable for non-safety automotive infotainment peripherals where AEC-Q100 is not mandated. |
Compared with SN74AC244QWRKSRQ1, SN74LVC244AQPWRQ1 lacks Schmitt inputs and 5V compatibility, while MC74VHC244DTG omits AEC-Q100 Grade 1 validation - making SN74AC244QWRKSRQ1 the only option meeting full automotive under-hood requirements with integrated noise immunity and wide-VCC flexibility.
Availability
SN74AC244QWRKSRQ1 is available at Aetrix Electronics and suitable for automotive body control modules, instrument cluster reset hold circuits, ADAS camera interface buffering, and debounced vehicle switch interfacing requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SN74AC244QWRKSRQ1 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 decades of automotive IC design expertise and rigorous qualification processes.
The SN74AC244QWRKSRQ1 belongs to TI's automotive logic portfolio, engineered specifically for noise-immune signal conditioning and bus isolation in harsh-temperature vehicle subsystems including powertrain, chassis, and driver-assistance systems.
FAQ
What is the maximum continuous output current rating for SN74AC244QWRKSRQ1 at 5V?
The SN74AC244QWRKSRQ1 supports ±24mA continuous output current per channel at 5V supply, as specified in the Recommended Operating Conditions table. This rating applies across the full –40°C to +125°C temperature range and ensures stable operation into standard CMOS loads or 50Ω transmission lines without thermal derating under typical PCB layout conditions.
Does SN74AC244QWRKSRQ1 support 1.8V logic interface?
Yes, SN74AC244QWRKSRQ1 operates down to 1.5V supply and fully supports 1.8V logic levels: VIH(min) = 1.26V and VIL(max) = 0.54V at 1.8V VCC, with tpd ≤12.0ns (typical). Its Schmitt-trigger inputs maintain noise margin even at this voltage, making it suitable for mixed-voltage automotive domains like ADAS sensor hubs.
How does the Schmitt-trigger input function benefit SN74AC244QWRKSRQ1 in automotive applications?
The Schmitt-trigger input in SN74AC244QWRKSRQ1 provides built-in hysteresis (≥0.3V at 3.3V), eliminating need for external RC debounce circuits on mechanical switch inputs like door ajar or hood open sensors. This reduces BOM cost, improves reliability against EMI-induced glitches, and ensures deterministic logic transitions in high-noise vehicle environments.
What is the purpose of the thermal pad in the RKS package of SN74AC244QWRKSRQ1?
The exposed thermal pad in the SN74AC244QWRKSRQ1 RKS package lowers junction-to-board thermal resistance to 40.4°C/W. It may be connected to GND plane for enhanced heat dissipation or left floating - but must never connect to signal or other supply nets. Proper pad soldering is essential to meet AEC-Q100 thermal lifetime requirements in under-hood deployments.
Can SN74AC244QWRKSRQ1 drive a 50Ω transmission line directly without external termination?
Yes, SN74AC244QWRKSRQ1 is explicitly characterized to drive 50Ω transmission lines, as confirmed in the Features section and Electrical Characteristics. At 5V, its output impedance and drive strength match typical PCB trace impedances, allowing clean signal edge delivery over distances up to 15cm without series resistors - validated in TI's Application Curve section.
SN74AC244QWRKSRQ1 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:
- Buffer, 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:
- 1.5V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (2.5x4.5)
SN74AC244QWRKSRQ1 FAQ
1.How can I place an order for SN74AC244QWRKSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC244QWRKSRQ1 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 SN74AC244QWRKSRQ1 reliable?
The price and inventory of SN74AC244QWRKSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC244QWRKSRQ1 is usually 5 days.
3.What payment methods are accepted for SN74AC244QWRKSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC244QWRKSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AC244QWRKSRQ1?
SN74AC244QWRKSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC244QWRKSRQ1 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 SN74AC244QWRKSRQ1?
For technical support, including SN74AC244QWRKSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC244QWRKSRQ1 requirements.
6.How does Aetrix verify that SN74AC244QWRKSRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74AC244QWRKSRQ1 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 SN74AC244QWRKSRQ1 meets industry standards.
7.What is the process for return or replacement of SN74AC244QWRKSRQ1?
All SN74AC244QWRKSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC244QWRKSRQ1, 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 SN74AC244QWRKSRQ1 part is unused and in its original packaging.
Return procedure for SN74AC244QWRKSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AC244QWRKSRQ1 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
