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Texas Instruments SN74AC244MNSREP
- Part No.:
- SN74AC244MNSREP
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74AC244MNSREP.pdf
- Description:
- IC BUFF NON-INVERT 6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,109
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Product details
Overview
SN74AC244MNSREP from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for memory address and bus driving in industrial control and embedded systems. It operates from 2 V to 6 V, supports input voltages up to 6 V, delivers ±24 mA output drive at 5.5 V, and achieves 7.5 ns max propagation delay at 5 V.
For engineers reviewing the SN74AC244MNSREP datasheet, SN74AC244MNSREP pinout, SN74AC244MNSREP application, or SN74AC244MNSREP equivalent, this page provides verified functional specifications, thermal and electrical operating limits, 3-state control behavior, SOIC-20 package layout, and direct alternatives for high-reliability extended-temperature designs.
Technical Context
The SN74AC244MNSREP implements two independent 4-bit noninverting buffers, each with dedicated output-enable (OE) control. Its TTL-compatible inputs accept voltages up to 6 V regardless of VCC, enabling mixed-voltage interfacing. The 3-state outputs support bus sharing without contention.
Designed for extended temperature operation (–55°C to 125°C), it uses enhanced plastic packaging qualified per JEDEC standards including HAST, temperature cycling, and intermetallic life testing. Absolute maximum ratings include ±20 mA clamp current and 7 V supply tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 6 V - supports wide-input-voltage logic interfacing across 3.3 V and 5 V systems |
| Max Propagation Delay | 7.5 ns at 5 V - enables high-speed address/data buffering in real-time control buses |
| Output Drive | ±24 mA at 5.5 V - sufficient to drive 50 Ω transmission lines or multiple CMOS loads |
| Input Voltage Tolerance | Up to VCC + 0.5 V - allows safe interfacing with 5 V signals even when VCC = 3.3 V |
| Operating Temperature | –55°C to 125°C - qualified for aerospace, defense, and under-hood automotive applications |
| 3-State Leakage | ±5 µA at 5.5 V - ensures minimal bus leakage during high-impedance hold states |
| Power Dissipation Cap | 45 pF per buffer - defines dynamic power consumption at 1 MHz with 50 pF load |
Pinout & Package
SN74AC244MNSREP is housed in a 20-pin SOP (NS) package, 7.5 mm × 12.8 mm body size, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-Low Output Enable | Controls 4-bit group; low enables noninverted A→Y pass-through, high forces high-Z |
| 1A1–1A4, 2A1–2A4 | Input Data Lines | Noninverting inputs for respective 4-bit buffer sections |
| 1Y1–1Y4, 2Y1–2Y4 | 3-State Output Lines | Buffered, level-translated outputs with high-impedance disable state |
| VCC (Pin 19) | Supply Voltage | 2 V–6 V logic supply; powers internal circuitry and defines output voltage swing |
| GND (Pin 10) | Ground Reference | Return path for all I/O and supply currents; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Extended Temperature Qualification | JEDEC-qualified for –55°C to 125°C operation with HAST, temperature cycle, and intermetallic life testing |
| Wide Supply Voltage Range | 2 V–6 V operation enables compatibility with legacy 5 V and modern 3.3 V systems without level shifters |
| TTL-Compatible Inputs | Inputs tolerate up to 6 V regardless of VCC - simplifies mixed-voltage board design and reduces BOM count |
| Controlled Baseline Manufacturing | Single assembly/test site and single fabrication site ensure consistent parametric performance and long-term supply stability |
| Low Propagation Delay | 7.5 ns max at 5 V supports >100 MHz bus timing margins in deterministic control applications |
Applications
| Industrial PLC Backplane | Aerospace Avionics Bus |
|---|---|
Use Scenario: Driving address/data lines between CPU and memory modules on ruggedized backplanes exposed to vibration and thermal cycling. IC Role / Device Role / Timing Role: Octal buffer isolates and strengthens signals while enabling bus arbitration via 3-state control. Use Value: ±24 mA drive and –55°C to 125°C rating ensure reliable signal integrity across extreme environmental conditions. | Use Scenario: Interfacing flight control microcontrollers with sensor acquisition units in sealed avionics enclosures. IC Role / Device Role / Timing Role: Noninverting buffer with independent OE pins routes time-critical sensor data while minimizing skew. Use Value: 7.5 ns max tpd and JEDEC-qualified reliability meet DO-254 timing and safety requirements. |
| Military Communication Radios | Downhole Oilfield Instrumentation |
Use Scenario: Signal conditioning between FPGA I/O banks and RF front-end ASICs in compact, conduction-cooled radio modules. IC Role / Device Role / Timing Role: Level-shifting buffer translates 3.3 V FPGA outputs to 5 V-compatible bus loads with no external components. Use Value: Input tolerance up to VCC + 0.5 V eliminates need for discrete clamping diodes or translators. | Use Scenario: Isolating downhole telemetry controllers from high-noise motor drivers and analog sensor interfaces in oil/gas drilling tools. IC Role / Device Role / Timing Role: 3-state buffer enables shared serial bus communication between multiple sensors and master controller. Use Value: Low 3-state leakage (±5 µA) prevents bus contention and false triggering in high-impedance sensor networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AC244MDWREP | Same die, SOIC-20 (DW) package with 58°C/W θJA vs NS's 60°C/W; identical pinout and specs | DW has slightly better thermal performance; NS offers tighter footprint tolerance per IPC-7351 land patterns | Select DW for higher-power-density layouts; choose NS for space-constrained PCBs requiring optimized solder mask defined pads |
| SN74AC244-Q1 | Automotive Q100-qualified version; same electrical specs but with AEC-Q100 Grade 1 (–40°C to 125°C) and additional PPAP documentation | Required for automotive ECUs; not rated for –55°C or military screening | Use SN74AC244-Q1 only for automotive production; SN74AC244MNSREP remains preferred for defense and extended-temp industrial use |
Compared with SN74AC244MDWREP and SN74AC244-Q1, SN74AC244MNSREP uniquely combines military-grade temperature range (–55°C to 125°C), controlled baseline manufacturing, and SOP-20 packaging optimized for high-reliability industrial assembly - making it the default choice where extended cold-start capability and supply chain continuity are critical.
Availability
SN74AC244MNSREP is available at Aetrix Electronics and suitable for industrial PLC backplanes, aerospace avionics buses, military communication radios, downhole oilfield instrumentation, and ruggedized embedded controllers requiring stable component supply across extended temperature ranges.
Supply support for SN74AC244MNSREP 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 over 50 years of industrial and aerospace qualification experience.
The SN74AC244MNSREP belongs to TI's AC logic family - engineered for high-speed, low-power, extended-temperature operation in mission-critical infrastructure and defense electronics.
FAQ
What is the operating temperature range of SN74AC244MNSREP?
The SN74AC244MNSREP is rated for continuous operation from –55°C to 125°C. This extended temperature range is achieved through JEDEC-qualified enhanced plastic packaging, including Highly Accelerated Stress Test (HAST), temperature cycling, and intermetallic life validation - making SN74AC244MNSREP suitable for aerospace, defense, and downhole applications where ambient extremes are routine.
Does SN74AC244MNSREP support mixed-voltage interfacing?
Yes, SN74AC244MNSREP supports mixed-voltage interfacing: its inputs tolerate voltages up to VCC + 0.5 V (maximum 6 V), allowing 5 V signals to be safely applied even when VCC = 3.3 V. This eliminates external level-shifting components in hybrid 3.3 V/5 V systems, and is confirmed in the Recommended Operating Conditions table of the official datasheet.
What is the maximum output drive capability of SN74AC244MNSREP?
SN74AC244MNSREP delivers ±24 mA output current per channel at VCC = 5.5 V, as specified in the Electrical Characteristics table. This drive strength supports direct connection to 50 Ω transmission lines, termination resistors, or multiple CMOS loads - verified under IOL/IOH test conditions with VOL ≤ 0.5 V and VOH ≥ 4.7 V.
How does the 3-state control work on SN74AC244MNSREP?
SN74AC244MNSREP features two independent active-low output-enable inputs (1OE and 2OE), each controlling a 4-bit buffer section. When OE is low, data passes noninverted from A inputs to Y outputs; when OE is high, outputs enter high-impedance state. To ensure safe high-Z during power-up, TI recommends tying OE to VCC via a pullup resistor sized per driver sink capability.
Is SN74AC244MNSREP pin-compatible with standard SN74AC244 variants?
Yes, SN74AC244MNSREP shares identical pinout and functionality with SN74AC244MDWREP and commercial SN74AC244 - all use the same 20-pin SOIC footprint and logic behavior. Differences are limited to package variant (NS vs DW), temperature screening, and qualification pedigree; no PCB redesign is needed when substituting within the same package type.
SN74AC244MNSREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74AC244MNSREP FAQ
1.How can I place an order for SN74AC244MNSREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC244MNSREP 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 SN74AC244MNSREP reliable?
The price and inventory of SN74AC244MNSREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC244MNSREP is usually 5 days.
3.What payment methods are accepted for SN74AC244MNSREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC244MNSREP transactions.
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4.How is shipping managed for SN74AC244MNSREP?
SN74AC244MNSREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC244MNSREP 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 SN74AC244MNSREP?
For technical support, including SN74AC244MNSREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC244MNSREP requirements.
6.How does Aetrix verify that SN74AC244MNSREP is sourced from the original manufacturer or authorized distributors?
All SN74AC244MNSREP 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 SN74AC244MNSREP meets industry standards.
7.What is the process for return or replacement of SN74AC244MNSREP?
All SN74AC244MNSREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC244MNSREP, 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 SN74AC244MNSREP part is unused and in its original packaging.
Return procedure for SN74AC244MNSREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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