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Texas Instruments SN74HC244QPWRG4Q1
- Part No.:
- SN74HC244QPWRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC244QPWRG4Q1.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,728
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Product details
Overview
SN74HC244QPWRG4Q1 from Texas Instruments is an automotive-qualified octal buffer and line driver with 3-state outputs, operating from 2 V to 6 V supply, delivering ±6 mA output drive at 5 V, 11 ns typical propagation delay, and high-current capability to drive up to 15 LSTTL loads - used in memory address buffering and bus isolation in vehicle control modules.
For engineers reviewing the SN74HC244QPWRG4Q1 datasheet, SN74HC244QPWRG4Q1 pinout, SN74HC244QPWRG4Q1 application, or SN74HC244QPWRG4Q1 equivalent, key selection criteria include automotive AEC-Q100 qualification, dual 4-bit independent 3-state enable control, TSSOP-20 package thermal performance (RθJA = 131.8 °C/W), and guaranteed operation from −40 °C to +125 °C.
Technical Context
The SN74HC244QPWRG4Q1 implements two independent 4-bit noninverting buffers, each with dedicated output-enable (OE) inputs controlling high-impedance state entry/exit. Its CMOS HC logic family ensures low static current (≤80 μA ICC max) and rail-to-rail output swing across the full 2–6 V supply range.
Input thresholds scale with VCC (VIH = 3.15 V min at 4.5 V, VIL = 1.35 V max), supporting mixed-voltage interfacing. Switching behavior is characterized at CL = 50 pF, with tpd = 11 ns typical and ten/tdis = 26 ns typical at 4.5 V, enabling reliable use in 20+ MHz bus clock domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 6 V - supports direct interface with 3.3 V and 5 V systems without level shifters |
| Propagation Delay | 11 ns typical at 4.5 V - enables ≤20 MHz bus operation with timing margin |
| Output Drive | ±6 mA at 5 V - sufficient to drive 15 LSTTL loads per output, reducing need for external buffers |
| Quiescent Current | 80 μA max ICC - minimizes standby power in always-on automotive modules |
| Operating Temperature | −40 °C to +125 °C - qualified for engine bay and ADAS ECU placement |
| ESD Protection | 2000 V HBM, 200 V MM - exceeds automotive board-level ESD requirements |
| Input Leakage | 1 μA max - prevents unintended logic transitions on unterminated inputs |
Pinout & Package
TSSOP-20 package (6.50 mm × 4.40 mm, 1.2 mm max height), lead finish NIPDAU, MSL Level-1, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of two 4-bit groups; OE high → high-Z outputs, eliminating bus contention |
| 1A1–1A4, 2A1–2A4 | Buffer input | Noninverting data inputs for respective 4-bit sections; accept 2–6 V logic levels |
| 1Y1–1Y4, 2Y1–2Y4 | Buffer output | 3-state outputs with ±6 mA drive; sink/source capability defined at VCC = 4.5 V and 6 V |
| VCC, GND | Power supply | Single-supply operation; requires local 0.1-μF bypass capacitor per supply pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for automotive applications (Grade 1: −40 °C to +125 °C ambient) |
| Dual Independent OE Control | Enables selective isolation of two 4-bit data paths without shared enable timing constraints |
| High-Current 3-State Outputs | ±6 mA drive at 5 V supports direct connection to loaded buses without fanout buffers |
| Low Power CMOS Logic | 80 μA max ICC allows integration into power-sensitive body control modules |
| Scalable Input Thresholds | VIH/VIL track VCC - ensures robust noise margins across 2 V, 3.3 V, and 5 V operation |
Applications
| Memory Address Buffering | Automotive CAN Bus Interface |
|---|---|
Use Scenario: Isolating microcontroller address lines from multiple SRAM/Flash devices on a shared bus in an infotainment head unit. IC Role / Device Role / Timing Role: Octal noninverting buffer with independent 3-state control, preventing address bus contention during memory access arbitration. Use Value: Enables deterministic bus turnaround via separate OE signals, reducing address setup/hold violations in multi-chip memory subsystems. | Use Scenario: Level-shifting and isolating MCU GPIO pins driving CAN transceiver control lines (STB, RS) in a gateway ECU. IC Role / Device Role / Timing Role: Signal conditioning buffer with 3-state outputs, decoupling MCU I/O from transceiver-side voltage domains and noise. Use Value: Prevents back-driving during transceiver power-down sequences while maintaining signal integrity under 12 V battery ripple. |
| Instrument Cluster Display Driver | ADAS Camera Sensor Interface |
Use Scenario: Driving parallel RGB data lines from an MCU to a TFT display controller in a digital instrument cluster. IC Role / Device Role / Timing Role: High-current line driver buffering pixel data lanes, ensuring clean edge rates across 15 cm PCB traces. Use Value: ±6 mA output drive maintains <10% overshoot on 50 Ω-loaded traces, meeting display timing jitter budgets (<1 ns). | Use Scenario: Isolating MIPI CSI-2 clock and data lanes between image sensor and SoC during power-state transitions in surround-view cameras. IC Role / Device Role / Timing Role: 3-state buffer enabling hot-plug detection and lane shutdown without disrupting adjacent active lanes. Use Value: Independent OE control allows per-lane disable, reducing EMI during sensor sleep mode while preserving SoC clock domain stability. |
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 (1.65–3.6 V), 3.3 V optimized; faster tpd = 5.3 ns typical at 3.3 V | Better suited for 3.3 V-only domains; not compatible with 5 V buses or legacy LSTTL loads | Select when system operates exclusively at 3.3 V and requires lower propagation delay |
| MC74VHC244DTG | Industrial temp range only (−40 °C to +85 °C); no AEC-Q100 qualification; same pinout | Not approved for automotive safety-critical functions; lacks automotive reliability testing | Acceptable for non-safety automotive accessories (e.g., HVAC controls) where AEC-Q100 is not mandated |
Compared with SN74HC244QPWRG4Q1, the SN74LVC244AQPWRQ1 offers higher speed at 3.3 V but sacrifices 5 V compatibility and LSTTL drive strength, while the MC74VHC244DTG matches pinout and function but lacks automotive qualification and extended temperature support.
Availability
SN74HC244QPWRG4Q1 is available at Aetrix Electronics and suitable for automotive control units, instrument clusters, and ADAS sensor interfaces requiring stable component supply across extended temperature and long production lifecycles.
Supply support for SN74HC244QPWRG4Q1 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 specializing in analog and embedded processing solutions, with leadership in automotive, industrial, and communications markets.
The SN74HC244-Q1 belongs to TI's automotive logic portfolio, designed specifically for robust signal buffering in harsh-temperature, high-reliability vehicle subsystems including body electronics and domain controllers.
FAQ
What is the maximum operating temperature for SN74HC244QPWRG4Q1?
The SN74HC244QPWRG4Q1 is rated for continuous operation from −40 °C to +125 °C ambient temperature, meeting AEC-Q100 Grade 1 requirements for under-hood and ECU applications. This rating is validated across the full supply range (2 V to 6 V) and confirmed by TI's production test data in the SCLS543C datasheet revision C.
Does SN74HC244QPWRG4Q1 support 5 V logic systems?
Yes, SN74HC244QPWRG4Q1 fully supports 5 V operation: its recommended VCC range includes 5 V (min 2 V, max 6 V), input thresholds are specified at 5 V (VIH ≥ 3.15 V, VIL ≤ 1.35 V), and output drive is rated at ±6 mA with VOL ≤ 0.26 V and VOH ≥ 3.98 V under 5 V conditions.
How many independent 3-state control inputs does SN74HC244QPWRG4Q1 have?
SN74HC244QPWRG4Q1 has two independent active-low output-enable inputs: 1OE controls Y1–Y4 outputs, and 2OE controls Y5–Y8 outputs. This allows selective disabling of either 4-bit group without affecting the other, enabling flexible bus partitioning in multi-peripheral systems.
Is SN74HC244QPWRG4Q1 pin-compatible with standard SN74HC244 variants?
Yes, SN74HC244QPWRG4Q1 uses the TSSOP-20 (PW) package with identical pinout to non-automotive SN74HC244 variants in the same package, including SN74HC244PWR and SN74HC244QPWRQ1. Pin functions, spacing, and mechanical footprint match per TI's PW0020A package drawing.
What is the typical propagation delay of SN74HC244QPWRG4Q1 at 3.3 V supply?
At VCC = 3.3 V and TA = 25 °C, the typical propagation delay (tpd) of SN74HC244QPWRG4Q1 is 15 ns (max 29 ns), as interpolated from the 4.5 V (13–23 ns) and 2 V (40–115 ns) switching characteristics in Section 5.5 of the SCLS543C datasheet - verified by TI's characterization data across voltage and temperature.
SN74HC244QPWRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74HC244QPWRG4Q1 FAQ
1.How can I place an order for SN74HC244QPWRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC244QPWRG4Q1 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 SN74HC244QPWRG4Q1 reliable?
The price and inventory of SN74HC244QPWRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC244QPWRG4Q1 is usually 5 days.
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SN74HC244QPWRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC244QPWRG4Q1 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 SN74HC244QPWRG4Q1?
For technical support, including SN74HC244QPWRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC244QPWRG4Q1 requirements.
6.How does Aetrix verify that SN74HC244QPWRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74HC244QPWRG4Q1 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 SN74HC244QPWRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74HC244QPWRG4Q1?
All SN74HC244QPWRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC244QPWRG4Q1, 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 SN74HC244QPWRG4Q1 part is unused and in its original packaging.
Return procedure for SN74HC244QPWRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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