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Texas Instruments SN74AHC244MPWREPG4
- Part No.:
- SN74AHC244MPWREPG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC244MPWREPG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,733
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Product details
Overview
SN74AHC244MPWREPG4 from Texas Instruments is an octal 3-state buffer/driver IC designed for bus interface and memory address driving in high-reliability industrial systems. It operates from 2 V to 5.5 V, supports –55°C to 125°C extended temperature range, features ±25 mA output drive, and delivers propagation delays as low as 3.9 ns (VCC = 5 V, CL = 15 pF). It is used in space-constrained TSSOP-20 applications requiring latch-up immunity (>250 mA) and robust ESD protection (1500 V HBM).
For engineers reviewing the SN74AHC244MPWREPG4 datasheet, SN74AHC244MPWREPG4 pinout, SN74AHC244MPWREPG4 application, or SN74AHC244MPWREPG4 equivalent, key selection criteria include 3-state bus isolation capability, dual independent OE control, thermal performance (θJA = 83°C/W), and EPIC™ process qualification for harsh-environment operation.
Technical Context
This device implements two independent 4-bit noninverting buffers, each with dedicated output-enable (OE) inputs-1OE controls Y1–Y4, 2OE controls Y5–Y8. Inputs accept TTL-level thresholds across the full 2–5.5 V supply range, and outputs drive CMOS or TTL loads while maintaining rail-to-rail swing.
Its EPIC™ process ensures controlled baseline manufacturing, enhanced DMS support, and qualification per JEDEC/industry standards including HAST, temperature cycling, and electromigration testing-enabling reliable operation in extended-temperature military, aerospace, and downhole industrial systems.
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 |
| Operating Temperature | –55°C to 125°C - qualified for extended-temperature industrial, defense, and automotive under-hood use |
| tPLH / tPHL (5 V, 15 pF) | 3.9 ns max - enables high-speed address/data bus buffering up to ~100 MHz toggle rate |
| IOL / IOH | ±8 mA at 5 V - sufficient to drive 10+ CMOS loads or 2–3 TTL inputs without external buffering |
| IOZ (High-Z Leakage) | ±2.5 µA max at 5.5 V - ensures minimal bus contention during 3-state disable in multi-driver systems |
| Latch-Up Immunity | >250 mA per JESD 17 - prevents destructive latch-up during transient overvoltage events |
| ESD Protection | 1500 V HBM, 150 V MM - exceeds MIL-STD-833 requirements for handling and board assembly robustness |
Pinout & Package
TSSOP-20 package (PW), 0.65 mm pitch, 6.5 mm × 4.4 mm body, moisture sensitivity level 1 (260°C peak reflow), RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output-enable controls first and second 4-bit buffer sections independently |
| 2, 4, 6, 8 | 1A1–1A4 | Inputs to first buffer section; routed to Y1–Y4 when 1OE = L |
| 3, 18, 16, 14 | 1Y1–1Y4 | Noninverting buffered outputs of first section; high-impedance when 1OE = H |
| 11, 13, 15, 17 | 2A1–2A4 | Inputs to second buffer section; routed to Y5–Y8 when 2OE = L |
| 9, 7, 5, 3 | 2Y1–2Y4 | Noninverting buffered outputs of second section; high-impedance when 2OE = H |
| 10, 20 | GND, VCC | Power reference and supply pins; decoupling capacitor placement critical for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state control | Enables selective isolation of two 4-bit data paths on shared bus without external logic |
| Extended temperature qualification | Validated operation from –55°C to 125°C with HAST, temperature cycle, and intermetallic life testing |
| EPIC™ process technology | Delivers improved speed-power product, reduced leakage, and enhanced radiation tolerance vs. standard CMOS |
| Bus-hold circuitry absent | Requires external pull-up/down resistors on unused inputs to prevent floating node-induced malfunction |
| Low dynamic power dissipation | Cpd = 8.6 pF at 5 V - minimizes switching current and heat generation in high-frequency bus applications |
Applications
| Industrial PLC Backplane Interface | Aerospace Avionics Data Bus Isolation |
|---|---|
|
Use Scenario: Isolating CPU address/data buses from modular I/O cards in programmable logic controllers operating in factory environments with wide ambient swings. IC Role / Device Role / Timing Role: Octal noninverting buffer with dual OE control provides directionally agnostic bus extension and hot-swap-safe 3-state isolation. Use Value: Enables deterministic bus arbitration and eliminates signal contention during card insertion/removal at –40°C to 85°C ambient. |
Use Scenario: Interfacing flight computer memory subsystems with sensor acquisition modules in UAVs exposed to –55°C cold-soak and 125°C thermal soak conditions. IC Role / Device Role / Timing Role: High-reliability octal driver translates between 3.3 V processor buses and 5 V legacy avionics peripherals with precise timing control. Use Value: Guaranteed 3.9 ns propagation delay at 5 V ensures setup/hold compliance for 100 MHz synchronous transfers across extreme temperature gradients. |
| Downhole Oilfield Instrumentation | Military Vehicle Control Unit |
|
Use Scenario: Buffering sensor ADC outputs and FPGA configuration data lines in borehole telemetry tools subjected to 150°C ambient and mechanical shock. IC Role / Device Role / Timing Role: 3-state driver manages bidirectional SPI and parallel configuration interfaces while surviving >250 mA latch-up events. Use Value: EPIC™ process and JESD 17 latch-up immunity prevent field failure during ESD transients in high-static drilling environments. |
Use Scenario: Driving display multiplexers and CAN controller address latches in armored vehicle ECUs operating under engine-bay thermal stress and EMI exposure. IC Role / Device Role / Timing Role: Dual-OE octal buffer isolates microcontroller GPIO banks from noisy power electronics subsystems via controlled enable sequencing. Use Value: 1500 V HBM ESD rating ensures survivability during field maintenance in ungrounded military maintenance bays. |
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 |
|---|---|---|---|
| SN74AHC244MDWREP | SOIC-20 package (θJA = 58°C/W), same electrical specs and EP qualification | Better thermal performance in low-airflow PCB layouts; larger footprint limits high-density routing | Select when board layout allows SOIC and thermal management prioritizes lower junction rise |
| SN74LV244APWREPG4 | LV family: 1.65–3.6 V VCC range, lower drive (±12 mA), higher VOL/VOL mismatch at 3.3 V | Optimized for 3.3 V-only systems; not rated for –55°C to 125°C or EPIC™ reliability testing | Select only for cost-sensitive commercial 3.3 V applications where extended temp and latch-up immunity are not required |
Compared with SN74AHC244MDWREP, SN74AHC244MPWREPG4 trades 25°C/W higher thermal resistance for 30% smaller PCB area; compared with SN74LV244APWREPG4, it adds 2.5 V wider supply range, 125°C operation, and JEDEC-qualified reliability-critical for mission-critical embedded control.
Availability
SN74AHC244MPWREPG4 is available at Aetrix Electronics and suitable for industrial automation, aerospace data acquisition, downhole instrumentation, and military vehicle control systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for SN74AHC244MPWREPG4 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 high-reliability logic solutions, with decades of heritage in precision timing, power management, and industrial-grade IC design.
The SN74AHC244MPWREPG4 belongs to TI's enhanced-performance "-EP" logic family, engineered specifically for extended-temperature, high-availability applications in defense, aerospace, energy, and transportation infrastructure.
FAQ
What is the maximum clock frequency supported by SN74AHC244MPWREPG4 in bus-driving applications?
The SN74AHC244MPWREPG4 does not operate on a clock; it is a combinatorial buffer. Its usable data rate depends on propagation delay and load capacitance. At VCC = 5 V and CL = 15 pF, tPLH/tPHL is 3.9 ns max, supporting clean signal edges up to ~100 MHz toggle frequency in well-terminated 3-state bus systems. System-level timing must account for board trace delays and receiver setup/hold windows.
Does SN74AHC244MPWREPG4 include bus-hold or auto-direction control features?
No, SN74AHC244MPWREPG4 has neither bus-hold nor auto-direction circuitry. All inputs must be actively driven or externally biased to VCC/GND using pull-up/pull-down resistors to prevent floating nodes, per TI application report SCBA004. Direction control is implemented externally via the two independent OE pins (1OE and 2OE), requiring discrete logic or MCU GPIO for sequencing.
Can SN74AHC244MPWREPG4 be used in 2.5 V systems?
Yes, SN74AHC244MPWREPG4 is fully specified from 2 V to 5.5 V. At VCC = 2.5 V, VIH = 1.7 V min and VIL = 0.7 V max ensure compatibility with 2.5 V logic families. Output drive reduces to ±4 mA (IOL/IOH), sufficient for driving 2.5 V CMOS loads with ≤30 pF total capacitance and maintaining noise margins above 0.4 V.
What is the recommended power-up sequencing for SN74AHC244MPWREPG4 to avoid bus contention?
To ensure high-impedance outputs at power-up, tie both 1OE and 2OE to VCC through pull-up resistors. TI recommends ≥10 kΩ for standard applications; value is determined by the current-sinking capability of the driving source. This guarantees outputs remain in 3-state until firmware or hardware asserts OE low, preventing unintended bus loading during reset.
Is SN74AHC244MPWREPG4 pin-compatible with the commercial SN74AHC244?
Yes, SN74AHC244MPWREPG4 shares identical pinout, function, and AC/DC specifications with the commercial SN74AHC244 in TSSOP-20. The "MPWREPG4" suffix denotes the enhanced-product (–55°C to 125°C), tape-and-reel packaging, and G4 green-RoHS compliance-no pin or logic behavior changes versus the base part.
SN74AHC244MPWREPG4 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:
- Discontinued at Digi-Key
- 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AHC244MPWREPG4 FAQ
1.How can I place an order for SN74AHC244MPWREPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC244MPWREPG4 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 SN74AHC244MPWREPG4 reliable?
The price and inventory of SN74AHC244MPWREPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC244MPWREPG4 is usually 5 days.
3.What payment methods are accepted for SN74AHC244MPWREPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC244MPWREPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC244MPWREPG4?
SN74AHC244MPWREPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC244MPWREPG4 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 SN74AHC244MPWREPG4?
For technical support, including SN74AHC244MPWREPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC244MPWREPG4 requirements.
6.How does Aetrix verify that SN74AHC244MPWREPG4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC244MPWREPG4 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 SN74AHC244MPWREPG4 meets industry standards.
7.What is the process for return or replacement of SN74AHC244MPWREPG4?
All SN74AHC244MPWREPG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC244MPWREPG4, 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 SN74AHC244MPWREPG4 part is unused and in its original packaging.
Return procedure for SN74AHC244MPWREPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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