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Texas Instruments SN74AHC244QPWRG4Q1
- Part No.:
- SN74AHC244QPWRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC244QPWRG4Q1.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,005
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Product details
Overview
SN74AHC244QPWRG4Q1 from Texas Instruments is an automotive-qualified octal buffer/driver with 3-state outputs, designed for bus-oriented receivers and transmitters in 2V–5.5V systems. It features two independent 4-bit channels, each with dedicated output-enable (OE) control, ±8 mA drive strength at 5 V, and propagation delays as low as 3.9 ns (tPLH/tPHL, CL = 15 pF, VCC = 5 V). It operates across −40°C to +125°C and is used in automotive infotainment data buses.
For engineers reviewing the SN74AHC244QPWRG4Q1 datasheet, SN74AHC244QPWRG4Q1 pinout, SN74AHC244QPWRG4Q1 application, or SN74AHC244QPWRG4Q1 equivalent, key selection criteria include 20-pin TSSOP packaging, AEC-Q100 qualification, dual 4-bit 3-state buffering architecture, high-speed switching performance under automotive temperature and voltage conditions, and compatibility with 3.3 V and 5 V logic systems.
Technical Context
The SN74AHC244QPWRG4Q1 implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated OE input (1OE and 2OE). When OE is low, inputs A pass directly to outputs Y; when OE is high, outputs enter high-impedance state-enabling bidirectional bus sharing without contention.
It uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) process for robust noise immunity and stable operation across wide voltage (2–5.5 V) and temperature (−40°C to +125°C) ranges. Input thresholds scale with VCC, and outputs support rail-to-rail swing with guaranteed VOL ≤ 0.5 V and VOH ≥ 4.8 V at 5 V supply and 8 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and brown-out tolerant operation in automotive power domains. |
| Output Drive | ±8 mA at 5 V - sufficient to drive 50-pF loads with <8.5 ns propagation delay, enabling reliable signal integrity on PCB traces up to ~10 cm. |
| Propagation Delay | 3.9 ns (min), 6.5 ns (max) at 5 V/15 pF - enables >100 MHz bus clocking in buffered address/data paths. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for engine bay and ADAS ECU environments. |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V at VCC = 5.5 V - ensures noise margin >0.7 V against coupled transients in automotive harnesses. |
| ESD Rating | ±1500 V HBM - meets automotive board-level ESD robustness requirements without external protection. |
| Quiescent Current | 4 μA typical at 5.5 V - minimizes standby power in always-on vehicle modules. |
Pinout & Package
TSSOP-20 (PW) package: 6.50 mm × 6.40 mm body size, 1.2 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE / 2OE | Active-low output enable controls first/second 4-bit buffer group; must be pulled high via resistor during power-up to ensure defined high-Z state. |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4 / 2A1–2A4 | Eight buffered inputs - accept 2–5.5 V logic levels; unused inputs must be tied to VCC or GND to prevent floating-induced shoot-through. |
| 3, 5, 7, 9, 12, 14, 16, 18 | 2Y4–2Y1 / 1Y4–1Y1 | Eight 3-state outputs - drive buses bidirectionally; high-Z state isolates downstream loads during disable. |
| 10 | GND | Ground reference for all I/O and internal logic; requires low-inductance connection to PCB ground plane. |
| 20 | VCC | Primary power supply; requires local 0.1 μF ceramic bypass capacitor placed within 3 mm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (−40°C to +125°C), certified for automotive safety-critical subsystems including body control and infotainment gateways. |
| Dual Independent OE Control | Enables selective activation of two 4-bit groups - allows partial bus isolation without full device disable, reducing system latency. |
| EPIC™ CMOS Process | Delivers low dynamic power (Cpd = 8.6 pF), high noise immunity (VIL(D) = 1.5 V), and stable timing across voltage/temperature corners. |
| Rail-to-Rail Output Swing | VOH ≥ 4.8 V and VOL ≤ 0.5 V at 5 V/8 mA - ensures full logic margin into downstream CMOS inputs and reduces susceptibility to crosstalk. |
| High-Speed Switching | tPLH/tPHL ≤ 6.5 ns (5 V/15 pF) - supports clean edge transitions on 25–50 MHz parallel buses in ADAS sensor interfaces. |
Applications
| Automotive Infotainment Data Bus | Engine Control Unit (ECU) Address Buffering |
|---|---|
Use Scenario: Isolating and driving multiplexed address/data lines between MCU and NAND flash or display controller in head unit. IC Role / Device Role / Timing Role: Octal 3-state buffer providing direction-controlled signal isolation and fanout amplification on shared 8-bit parallel bus. Use Value: Prevents bus contention during memory read/write cycles; enables hot-swap-safe peripheral addition via OE-controlled enable sequencing. |
Use Scenario: Buffering microcontroller address lines to multiple memory-mapped peripherals in engine management system. IC Role / Device Role / Timing Role: Non-inverting driver strengthening weak MCU address outputs while maintaining precise timing alignment across all 8 bits. Use Value: Eliminates address skew-induced setup/hold violations; supports reliable access to CAN, EEPROM, and ADC registers at 40 MHz clock rates. |
| ADAS Camera Interface Signal Conditioning | Automotive Gateway Module Level Translation |
Use Scenario: Driving serialized camera pixel data lanes from image processor to serializer IC under EMI-heavy chassis environment. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer ensuring signal integrity on 10–15 cm PCB traces between SoC and FPD-Link III PHY. Use Value: Maintains <100 ps inter-channel skew and <0.5 V VOL under 8 mA load - critical for pixel clock recovery and jitter-sensitive deserialization. |
Use Scenario: Interfacing 3.3 V domain MCU with 5 V legacy sensors or actuators in central gateway module. IC Role / Device Role / Timing Role: Voltage-tolerant level-shifting buffer translating logic levels without external resistors or direction control. Use Value: Supports seamless 3.3 V ↔ 5 V bidirectional communication using single-supply operation and scalable drive strength. |
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 |
|---|---|---|---|
| SN74LV244AQPWRQ1 | Lower VCC range (1.65–5.5 V); lower drive (±12 mA at 3.3 V but only ±6 mA at 5 V); higher ICC (20 μA typical). | Better suited for 1.8 V/3.3 V-only systems; less robust at full 5 V drive and higher temperature extremes. | Select when primary interface is 3.3 V and lower static power is prioritized over 5 V bus compatibility. |
| SN74AHCT244QPWRG4Q1 | TTL-compatible inputs (VIH = 2 V min at VCC = 4.5 V); identical pinout and drive; slightly higher propagation delay (4.5 ns min at 5 V). | Enables direct replacement of legacy 74LS244 in upgrade paths where TTL input thresholds are required for upstream logic. | Select when interfacing with older 5 V TTL devices or when input threshold compatibility outweighs marginal speed loss. |
Compared with SN74LV244AQPWRQ1 and SN74AHCT244QPWRG4Q1, the SN74AHC244QPWRG4Q1 offers optimal balance of wide supply range, consistent 5 V drive capability, and AEC-Q100 Grade 1 thermal performance - making it the preferred choice for new automotive designs requiring interoperability across 2–5.5 V domains.
Availability
SN74AHC244QPWRG4Q1 is available at Aetrix Electronics and suitable for automotive infotainment systems, engine control units, ADAS camera interfaces, and gateway modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for SN74AHC244QPWRG4Q1 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 logic solutions with over 50 years of automotive qualification experience.
The SN74AHC244-Q1 belongs to TI's AHC logic family, engineered specifically for high-speed, low-power, AEC-Q100-compliant buffering in automotive bus architectures - emphasizing noise immunity, thermal stability, and pin-compatible scalability across voltage domains.
FAQ
What is the operating temperature range for SN74AHC244QPWRG4Q1?
The SN74AHC244QPWRG4Q1 is rated for −40°C to +125°C and is AEC-Q100 Grade 1 qualified. This range is validated across all electrical parameters in the datasheet, including propagation delay, drive strength, and input thresholds - ensuring reliable operation in under-hood and dashboard-mounted automotive ECUs where ambient temperatures exceed 105°C.
Does SN74AHC244QPWRG4Q1 support 3.3 V logic systems?
Yes, SN74AHC244QPWRG4Q1 fully supports 3.3 V operation: VCC can be set from 2 V to 5.5 V, VIH/VIL thresholds scale accordingly (e.g., VIH = 2.1 V min at VCC = 3 V), and it delivers ±4 mA drive at 3.3 V with tPLH/tPHL ≤ 8.4 ns (CL = 15 pF). Its EPIC™ process ensures stable timing and noise margins in mixed-voltage automotive domains.
How should unused inputs be handled on SN74AHC244QPWRG4Q1?
All unused inputs on SN74AHC244QPWRG4Q1 must be tied to VCC or GND - never left floating - to prevent undefined logic states, increased ICC, or potential latch-up. TI recommends tying unused A inputs to GND for lowest power, or to VCC if system layout favors pull-up biasing. OE pins should be pulled high via resistor during power-up to guarantee high-Z default state.
Is SN74AHC244QPWRG4Q1 pin-compatible with other TSSOP-20 octal buffers?
SN74AHC244QPWRG4Q1 shares identical pinout and function mapping with SN74LV244AQPWRQ1 and SN74AHCT244QPWRG4Q1 in TSSOP-20 (PW) package. However, electrical differences - such as input threshold behavior, drive strength, and propagation delay - require validation in target application circuits before substitution, especially under worst-case voltage and temperature conditions.
What is the maximum capacitive load SN74AHC244QPWRG4Q1 can drive reliably?
SN74AHC244QPWRG4Q1 is characterized up to 50 pF load capacitance, with specified tPLH/tPHL = 7.5 ns (max) at VCC = 5 V and CL = 50 pF. For reliable signal integrity beyond 50 pF, external series termination or reduced slew rate via load adjustment is recommended - particularly in long-trace automotive wiring harness interfaces where reflections may occur.
SN74AHC244QPWRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- 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:
- 8mA, 8mA
- 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-TSSOP
SN74AHC244QPWRG4Q1 FAQ
1.How can I place an order for SN74AHC244QPWRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC244QPWRG4Q1 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 SN74AHC244QPWRG4Q1 reliable?
The price and inventory of SN74AHC244QPWRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC244QPWRG4Q1 is usually 5 days.
3.What payment methods are accepted for SN74AHC244QPWRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC244QPWRG4Q1 transactions.
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4.How is shipping managed for SN74AHC244QPWRG4Q1?
SN74AHC244QPWRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC244QPWRG4Q1 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 SN74AHC244QPWRG4Q1?
For technical support, including SN74AHC244QPWRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC244QPWRG4Q1 requirements.
6.How does Aetrix verify that SN74AHC244QPWRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74AHC244QPWRG4Q1 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 SN74AHC244QPWRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74AHC244QPWRG4Q1?
All SN74AHC244QPWRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC244QPWRG4Q1, 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 SN74AHC244QPWRG4Q1 part is unused and in its original packaging.
Return procedure for SN74AHC244QPWRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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