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Texas Instruments SN74LV244AQDGSRQ1
- Part No.:
- SN74LV244AQDGSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
SN74LV244AQDGSRQ1.pdf
- Description:
- AUTOMOTIVE EIGHT-CHANNEL 2-V TO
- Quantity:
- Payment:
- Shipping:
Inventory:4,883
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Product details
Overview
SN74LV244AQDGSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive octal buffer/driver IC with dual 4-channel banks, 3-state outputs, 2 V to 5.5 V supply operation, 6.5 ns max propagation delay at 5 V, and Ioff partial-power-down support. It enables signal routing and isolation in body control modules, infotainment interfaces, and ADAS sensor data paths.
For engineers reviewing the SN74LV244AQDGSRQ1 datasheet, SN74LV244AQDGSRQ1 pinout, SN74LV244AQDGSRQ1 application, or SN74LV244AQDGSRQ1 equivalent, key selection criteria include automotive temperature range (–40°C to +125°C), dual independent output-enable control, mixed-voltage port compatibility, wettable-flank WQFN-20 packaging, and latch-up immunity exceeding 250 mA.
Technical Context
The SN74LV244AQDGSRQ1 implements two independent 4-bit noninverting buffer banks, each controlled by a dedicated active-low output-enable pin (1OE, 2OE). Its CMOS architecture supports bidirectional voltage translation across ports operating at different VCC levels within 2 V–5.5 V.
It integrates Ioff circuitry that disables outputs and limits leakage to ≤5 µA when VCC = 0 V, enabling safe hot-insertion and partial-power-down system states. The device uses balanced push-pull 3-state outputs with matched sourcing/sinking capability up to ±16 mA at 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - Enables interoperability with 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| tpd (max) | 6.5 ns at 5 V, CL = 15 pF - Supports high-speed bus buffering in automotive serial interfaces and sensor multiplexing. |
| Operating Temp | –40°C to +125°C (TA) - Qualified for engine bay, powertrain, and ADAS ECU placement per AEC-Q100 Grade 1. |
| Ioff Leakage | ≤5 µA at VCC = 0 V - Prevents backflow current during power sequencing, critical for domain controller wake-up/sleep transitions. |
| ESD Rating | HBM ±4 kV, CDM ±2 kV - Meets automotive board-level ESD robustness requirements per AEC-Q100-002/-011. |
| Output Drive | ±16 mA at 5 V - Sufficient to drive 50 pF loads directly, including long PCB traces and multiple CMOS inputs. |
| Input Thresholds | VIH = 0.7×VCC, VIL = 0.3×VCC - Ensures noise margin >0.6 V at 3.3 V, compatible with standard LVCMOS signaling. |
Pinout & Package
SN74LV244AQDGSRQ1 is packaged in a 20-pin WQFN (WRKS) with 0.4 mm pitch, 4.50 mm × 2.50 mm body, and wettable flanks for automated optical inspection (AOI) of solder joints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low bank enable inputs | Independently disable Bank 1 (pins 1A1–1Y4) or Bank 2 (2A1–2Y4); tied to VCC via pull-up for power-up high-impedance safety. |
| 1A1–1A4, 2A1–2A4 | Buffer input terminals | Noninverting inputs for each of eight channels; must be terminated to VCC or GND if unused to prevent floating-induced oscillation. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state buffered outputs | Drive outputs only when respective OE is low; enter high-Z state otherwise, isolating downstream circuits during reset or sleep. |
| VCC (Pin 20) | Positive supply | Single rail powering all logic and output stages; requires local 0.1 µF bypass capacitor adjacent to pin. |
| GND (Pin 10) | Reference ground | Common return path for supply and I/O; connects to PCB ground plane for thermal and noise control. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for continuous operation from –40°C to +125°C ambient, enabling use in under-hood ECUs and radar modules. |
| Dual independent 3-state control | Separate 1OE/2OE pins allow selective isolation of two 4-bit data paths-e.g., isolating CAN transceiver interface from display driver bus. |
| Mixed-mode voltage operation | Inputs accept voltages up to 5.5 V regardless of VCC, permitting connection to higher-voltage sensors while powered from 3.3 V MCU rails. |
| Ioff partial-power-down protection | Blocks current flow between powered and unpowered sections during power sequencing, preventing damage in multi-rail automotive systems. |
| Wettable-flank WQFN package | Enables reliable AOI-based solder joint inspection on production lines, reducing field failure risk in safety-critical applications. |
Applications
| Body Control Module Signal Routing | Infotainment Display Interface |
|---|---|
Use Scenario: Isolating door lock actuator signals from central gateway during firmware update cycles. IC Role / Device Role / Timing Role: Octal buffer providing galvanic isolation between MCU GPIO and load drivers via 3-state outputs. Use Value: Prevents unintended actuation during reprogramming by placing outputs in high-Z state using 1OE/2OE control. | Use Scenario: Driving parallel RGB data lines from SoC to TFT panel while sharing same PCB layer with noise-sensitive audio traces. IC Role / Device Role / Timing Role: Signal repeater with matched rise/fall times and low skew (<1.5 ns) to maintain pixel timing integrity. Use Value: Eliminates signal degradation over 80 mm trace lengths without external termination resistors. |
| Radar Sensor Data Multiplexing | ADAS Camera Power Sequencing |
Use Scenario: Consolidating LVDS deserializer outputs from four corner radars into a single high-speed serial link. IC Role / Device Role / Timing Role: Level-shifting buffer enabling 3.3 V radar outputs to interface with 5 V FPGA capture logic. Use Value: Mixed-voltage operation avoids discrete level translators, reducing BOM count and layout area. | Use Scenario: Holding camera module reset line active until power rails stabilize after ignition-on event. IC Role / Device Role / Timing Role: Debounced switch interface with built-in hysteresis and glitch-free output enable timing. Use Value: Replaces RC+Schmitt trigger circuit with single IC, improving startup reliability across temperature extremes. |
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 min (1.65 V), faster tpd (5.2 ns @ 3.3 V), no wettable flanks in TSSOP package | Better suited for low-voltage MCU domains but lacks AOI-friendly packaging for high-reliability automotive assembly | Select when system operates below 2 V or requires tighter timing margins; avoid if board-level AOI is mandated. |
| MC74VHC244DTG | Non-automotive grade, wider VCC (2–5.5 V), no AEC-Q100 qualification, SOIC-20 package | Lacks temperature and ESD certification for automotive deployment; suitable only for prototyping or non-safety systems | Use for cost-sensitive industrial prototypes where AEC-Q100 is not required; not recommended for production vehicles. |
Compared with SN74LV244AQDGSRQ1, SN74LVC244AQPWRQ1 offers improved speed at lower voltage but sacrifices manufacturability assurance, while MC74VHC244DTG provides functional equivalence without automotive compliance-making SN74LV244AQDGSRQ1 the optimal choice for volume automotive production requiring both performance and process traceability.
Availability
SN74LV244AQDGSRQ1 is available at Aetrix Electronics and suitable for body control modules, ADAS sensor hubs, and infotainment head units requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.
Supply support for SN74LV244AQDGSRQ1 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The SN74LV244AQDGSRQ1 belongs to TI's automotive-qualified LV family of low-voltage logic devices, engineered specifically for robust signal buffering in harsh-temperature vehicle subsystems with stringent reliability and manufacturability requirements.
FAQ
What is the maximum capacitive load SN74LV244AQDGSRQ1 can drive while maintaining specified timing?
The SN74LV244AQDGSRQ1 is fully characterized for loads up to 50 pF, with switching parameters guaranteed in the datasheet at this capacitance. Driving larger loads increases propagation delay and may cause signal integrity issues like ringing; for >50 pF, series damping resistors or buffer staging is recommended. The SN74LV244AQDGSRQ1 datasheet specifies tpd = 6.5 ns max at 5 V with CL = 15 pF and 8.5 ns at CL = 50 pF.
Does SN74LV244AQDGSRQ1 support hot swapping or live insertion into a powered system?
Yes, SN74LV244AQDGSRQ1 supports partial-power-down operation via its Ioff feature: when VCC = 0 V, input/output leakage remains ≤5 µA, preventing damaging current backflow. This allows safe insertion into live backplanes or modular ECUs. However, both OE pins must be pulled to VCC before power application to ensure outputs remain in high-Z during ramp-up, as specified in the SN74LV244AQDGSRQ1 functional description.
Can SN74LV244AQDGSRQ1 interface between 3.3 V and 5 V logic domains without external level shifters?
Yes, SN74LV244AQDGSRQ1 supports mixed-mode voltage operation: inputs tolerate up to 5.5 V regardless of VCC, and outputs swing rail-to-rail (0 V to VCC). When powered at 3.3 V, it accepts 5 V inputs safely and drives 3.3 V-compatible loads. This eliminates discrete level translators in applications like connecting 5 V sensors to 3.3 V microcontrollers-confirmed by SN74LV244AQDGSRQ1's VI absolute max rating and VIH/VIL thresholds.
What is the purpose of the wettable flanks on the SN74LV244AQDGSRQ1 WRKS package?
The wettable flanks on the SN74LV244AQDGSRQ1's WQFN-20 (WRKS) package provide enhanced side-wall solder fillets during reflow, enabling reliable automated optical inspection (AOI) of solder joint quality. This feature directly supports zero-defect manufacturing goals in automotive electronics, where undetected voids or insufficient solder in QFN packages could lead to field failures. TI documents this capability in the SN74LV244AQDGSRQ1 mechanical drawings and AEC-Q100 test reports.
How should unused input pins be handled on SN74LV244AQDGSRQ1 to ensure stable operation?
All unused input pins on SN74LV244AQDGSRQ1-including 1A1–1A4, 2A1–2A4, 1OE, and 2OE-must be terminated to either VCC or GND to prevent floating, which can cause increased ICC, oscillation, or erratic output behavior. TI recommends 10-kΩ pull-up or pull-down resistors for unused inputs; direct connection is acceptable if the signal source is permanently inactive. This requirement is explicitly stated in the SN74LV244AQDGSRQ1 Recommended Operating Conditions table and Layout Guidelines section.
SN74LV244AQDGSRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-TFSOP (0.118", 3.00mm 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:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VSSOP
SN74LV244AQDGSRQ1 FAQ
1.How can I place an order for SN74LV244AQDGSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV244AQDGSRQ1 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 SN74LV244AQDGSRQ1 reliable?
The price and inventory of SN74LV244AQDGSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV244AQDGSRQ1 is usually 5 days.
3.What payment methods are accepted for SN74LV244AQDGSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV244AQDGSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV244AQDGSRQ1?
SN74LV244AQDGSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV244AQDGSRQ1 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 SN74LV244AQDGSRQ1?
For technical support, including SN74LV244AQDGSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV244AQDGSRQ1 requirements.
6.How does Aetrix verify that SN74LV244AQDGSRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LV244AQDGSRQ1 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 SN74LV244AQDGSRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LV244AQDGSRQ1?
All SN74LV244AQDGSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV244AQDGSRQ1, 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 SN74LV244AQDGSRQ1 part is unused and in its original packaging.
Return procedure for SN74LV244AQDGSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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