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onsemi MC74HC244ADTR2G-Q
- Part No.:
- MC74HC244ADTR2G-Q
- Manufacturer:
- onsemi
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC74HC244ADTR2G-Q.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,992
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Product details
Overview
MC74HC244ADTR2G-Q from onsemi is an octal 3-state noninverting buffer/line driver/line receiver in TSSOP-20 package, operating from 2.0 V to 6.0 V, delivering ±7.8 mA output drive per channel with 15 LSTTL load capability and propagation delay as low as 15 ns at 6.0 V - used for bidirectional bus interfacing in automotive control modules.
For engineers reviewing the MC74HC244ADTR2G-Q datasheet, pinout, applications, or equivalent options, key selection criteria include AEC-Q100 qualification, dual active-low output enables (Enable A, Enable B), 3-state output compatibility with CMOS/NMOS/TTL loads, and guaranteed operation from –55 °C to +125 °C.
Technical Context
The MC74HC244ADTR2G-Q implements two independent 4-bit noninverting buffer groups (A1–A4/YA1–YA4 and B1–B4/YB1–YB4), each controlled by a dedicated active-low output enable (Enable A on Pin 1, Enable B on Pin 19). Outputs enter high-impedance state when respective enable is high.
It uses standard High-Speed CMOS (HC) logic architecture with rail-to-rail input thresholds (VIH = 3.15 V min at VCC = 4.5 V; VIL = 1.35 V max), supports mixed-voltage interfacing via pullup resistors for LSTTL compatibility, and meets JEDEC Std No. 7A for commercial and automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports wide-input industrial and automotive power rails without level-shifting circuitry. |
| Output Drive (per pin) | ±7.8 mA at VCC = 6.0 V - drives up to 15 LSTTL loads directly, eliminating need for external buffers in legacy bus systems. |
| Propagation Delay (A→YA) | 15 ns max at VCC = 6.0 V - enables reliable timing in 33 MHz synchronous bus environments (e.g., memory address/data latching). |
| Input Leakage Current | ±1.0 µA max at 125 °C - ensures stable logic levels in high-temperature engine-control units without unintended toggling. |
| Operating Temperature | –55 °C to +125 °C - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive ECUs and industrial motor controllers. |
| 3-State Leakage | ±10 µA max at 125 °C - maintains clean bus isolation during sleep modes in CAN/LIN gateway modules. |
| ESD Rating (HBM) | >2000 V - provides robust handling margin during automated PCB assembly and field service operations. |
Pinout & Package
TSSOP-20 wide-body package (Case 948E), 6.5 mm × 4.4 mm footprint, 0.65 mm pitch, lead-free (Pb-free) and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | Enable A / Enable B | Active-low enables for Group A (YA1–YA4) and Group B (YB1–YB4); independent control allows time-multiplexed bus access. |
| 2, 4, 6, 8 | A1–A4 Inputs | Noninverting data inputs for first buffer group; compatible with CMOS, NMOS, and LSTTL outputs (with pullups). |
| 11, 13, 15, 17 | B1–B4 Inputs | Noninverting data inputs for second buffer group; electrically isolated from Group A for dual-bus separation. |
| 18, 16, 14, 12 | YA1–YA4 Outputs | 3-state noninverting outputs for Group A; high-impedance when Enable A = high. |
| 9, 7, 5, 3 | YB1–YB4 Outputs | 3-state noninverting outputs for Group B; high-impedance when Enable B = high. |
| 20 | VCC | Positive supply rail (2.0–6.0 V); decoupling capacitor required within 10 mm for noise immunity. |
| 10 | GND | Ground reference; must be connected to low-impedance system ground plane to minimize switching noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (–40 °C to +125 °C ambient), PPAP-capable - meets automotive OEM requirements for ECU signal conditioning. |
| Dual Independent Enables | Enable A (Pin 1) and Enable B (Pin 19) allow separate activation of two 4-bit data paths - enables compact dual-bus arbitration without external logic. |
| High Noise Immunity | CMOS input structure with >40% VCC noise margin - rejects coupled transients in noisy engine compartments and industrial motor drives. |
| Low Input Current | ±0.1 µA typical at 25 °C - reduces loading on upstream drivers and extends battery life in always-on automotive modules. |
| JEDEC Std No. 7A Compliant | Meets industry-standard timing, voltage, and interface definitions - ensures interoperability with legacy LS/TTL and modern CMOS systems. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Isolating and buffering LIN bus signals between microcontroller GPIO and external door-lock actuators. IC Role / Device Role / Timing Role: Noninverting line driver with 3-state control, enabling bidirectional communication while preventing bus contention during MCU reset. Use Value: Dual enable pins allow independent control of LIN TX/RX paths; AEC-Q100 qualification ensures reliability across vehicle lifetime. |
Use Scenario: Driving 8-bit parallel data lines from FPGA to isolated relay driver bank in modular I/O rack. IC Role / Device Role / Timing Role: Octal buffer with rail-to-rail output swing and fast propagation (≤20 ns @ 5 V) - preserves setup/hold timing margins in deterministic control loops. Use Value: ±7.8 mA drive per pin eliminates need for discrete transistor arrays; TSSOP-20 footprint saves board space vs. SOIC-20 alternatives. |
| Automotive Instrument Cluster | Medical Diagnostic Equipment Backplane |
|
Use Scenario: Level-shifting and buffering SPI clock/data lines between 3.3 V MCU and 5 V display controller ICs. IC Role / Device Role / Timing Role: CMOS-compatible buffer with TTL-input compatibility (via pullups) - bridges voltage domains without dedicated level translators. Use Value: Guaranteed operation down to –55 °C supports cold-climate instrument cluster startup; low leakage prevents false triggering during deep-sleep mode. |
Use Scenario: Isolating diagnostic bus signals between patient-monitoring SoC and modular sensor interface cards. IC Role / Device Role / Timing Role: 3-state line receiver with high-impedance disable - prevents backfeeding into powered-down sensor modules during hot-swap events. Use Value: ±10 µA max 3-state leakage at 125 °C ensures signal integrity during thermal stress testing; Pb-free/RoHS compliance meets IEC 60601-1 safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC244QPWRQ1 | TI AEC-Q100 Grade 1 part in TSSOP-20; identical pinout but higher ICC (160 µA max vs. 40 µA typ for MC74HC244ADTR2G-Q at 25 °C). | Higher quiescent current may impact battery-powered modules; same timing specs and drive strength. | Select if TI supply chain alignment is required; verify thermal budget in high-density layouts due to higher static power. |
| 74HC244PW,118 | Nexperia TSSOP-20 variant; rated only to +85 °C ambient, not AEC-Q100 qualified; identical electrical specs at 5 V. | Not suitable for under-hood automotive use; acceptable for industrial control panels with forced-air cooling. | Choose for cost-sensitive non-automotive designs where extended temperature range is unnecessary. |
Compared with SN74HC244QPWRQ1 and 74HC244PW,118, the MC74HC244ADTR2G-Q delivers lower typical ICC (4.0 µA), broader temperature support (–55 °C to +125 °C), and tighter 3-state leakage control - making it optimal for thermally constrained, safety-critical automotive signal routing.
Availability
MC74HC244ADTR2G-Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, and medical diagnostic equipment requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle assurance.
Supply support for MC74HC244ADTR2G-Q 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics for automotive, industrial, cloud, and IoT applications.
The MC74HC244ADTR2G-Q belongs to onsemi's automotive-qualified HC logic family, designed specifically for robust signal buffering and bus interfacing in harsh-environment electronic control units.
FAQ
What is the maximum operating temperature for the MC74HC244ADTR2G-Q?
The MC74HC244ADTR2G-Q is rated for continuous operation from –55 °C to +125 °C ambient temperature and is AEC-Q100 Grade 1 qualified. This specification is validated across all electrical parameters in the datasheet, including propagation delay, output drive, and 3-state leakage, ensuring reliable performance in under-hood automotive environments and high-temperature industrial enclosures. The MC74HC244ADTR2G-Q maintains full functionality without derating within this range.
Does the MC74HC244ADTR2G-Q support TTL-level inputs without external pull-up resistors?
No - the MC74HC244ADTR2G-Q is an HC-series device with CMOS input thresholds (VIH ≥ 3.15 V at VCC = 4.5 V), so direct connection to standard TTL outputs (VOH ≈ 2.4 V) will not guarantee logic-high recognition. However, the datasheet confirms that with external pull-up resistors to VCC, the MC74HC244ADTR2G-Q becomes compatible with LSTTL outputs. This configuration is explicitly validated and widely used in legacy bus interface designs.
How many independent output groups does the MC74HC244ADTR2G-Q provide?
The MC74HC244ADTR2G-Q provides two independent 4-bit noninverting output groups: Group A (inputs A1–A4 → outputs YA1–YA4, enabled by Pin 1) and Group B (inputs B1–B4 → outputs YB1–YB4, enabled by Pin 19). Each group has its own active-low enable, allowing simultaneous or time-multiplexed control of two separate data paths - a key feature confirmed in the logic diagram, function table, and pin descriptions of the official datasheet.
Is the MC74HC244ADTR2G-Q pin-compatible with the LS244?
Yes - the MC74HC244ADTR2G-Q is explicitly stated in the datasheet to be "identical in pinout to the LS244". This includes matching pin assignments for all inputs, outputs, enables, VCC, and GND. However, note that the MC74HC244ADTR2G-Q operates at higher speeds, wider voltage range (2.0–6.0 V), and lower power than the bipolar LS244, making it a functional and physical drop-in replacement in most legacy designs where voltage and timing margins permit.
What packaging and compliance certifications apply to the MC74HC244ADTR2G-Q?
The MC74HC244ADTR2G-Q is supplied in a Pb-free, RoHS-compliant TSSOP-20 wide-body package (Case 948E) and is fully AEC-Q100 qualified for automotive applications. It carries the "–Q" suffix denoting unique site and control change requirements, PPAP capability, and adherence to automotive quality management systems. The device also meets JEDEC Std No. 7A and has an ESD rating >2000 V HBM, as verified in the official onsemi datasheet.
MC74HC244ADTR2G-Q Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- HC
- 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
MC74HC244ADTR2G-Q FAQ
1.How can I place an order for MC74HC244ADTR2G-Q through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC244ADTR2G-Q 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 MC74HC244ADTR2G-Q reliable?
The price and inventory of MC74HC244ADTR2G-Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC244ADTR2G-Q is usually 5 days.
3.What payment methods are accepted for MC74HC244ADTR2G-Q?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC244ADTR2G-Q transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC244ADTR2G-Q?
MC74HC244ADTR2G-Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC244ADTR2G-Q 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 MC74HC244ADTR2G-Q?
For technical support, including MC74HC244ADTR2G-Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC244ADTR2G-Q requirements.
6.How does Aetrix verify that MC74HC244ADTR2G-Q is sourced from the original manufacturer or authorized distributors?
All MC74HC244ADTR2G-Q 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 MC74HC244ADTR2G-Q meets industry standards.
7.What is the process for return or replacement of MC74HC244ADTR2G-Q?
All MC74HC244ADTR2G-Q units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC244ADTR2G-Q, 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 MC74HC244ADTR2G-Q part is unused and in its original packaging.
Return procedure for MC74HC244ADTR2G-Q:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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