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Texas Instruments SN74LV244AMDWREP
- Part No.:
- SN74LV244AMDWREP
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LV244AMDWREP.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,592
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Product details
Overview
SN74LV244AMDWREP from Texas Instruments is an octal 3-state buffer/driver IC designed for bus interface and memory address driving in industrial and extended-temperature systems. It operates from 2 V to 5.5 V, delivers propagation delay as low as 4.9 ns at 5 V, supports partial-power-down via Ioff, and features dual independent output-enable (OE) controls for two 4-bit channels.
For engineers reviewing the SN74LV244AMDWREP datasheet, SN74LV244AMDWREP pinout, SN74LV244AMDWREP application, or SN74LV244AMDWREP equivalent, this page provides verified electrical specs, SOIC-20 package details, real-world use cases in bus buffering and clock distribution, and validated alternative parts for design continuity.
Technical Context
The SN74LV244AMDWREP implements noninverting 3-state logic with separate 1OE and 2OE inputs enabling independent control of two 4-bit data paths (1A1–1A4 → 1Y1–1Y4 and 2A1–2A4 → 2Y1–2Y4). Its Ioff circuitry ensures no backflow current during partial power-down, meeting JESD 78 latch-up immunity (>250 mA).
It supports mixed-mode voltage operation across all ports, allowing 3.3-V inputs to drive 5-V outputs and vice versa within VCC limits. Dynamic noise parameters - including VOLP < 0.8 V and VOHV > 2.3 V at 3.3 V - are characterized for signal integrity in high-speed digital buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables interoperability across 2.5-V, 3.3-V, and 5-V logic domains without level shifters. |
| Max tpd | 4.9 ns at 5 V - ensures sub-5-ns timing margin for 100-MHz+ bus cycles in memory and address drivers. |
| Ioff | 5 µA max - guarantees safe isolation during hot-insertion or partial system power-down without external blocking diodes. |
| Output Drive | ±16 mA at 4.5–5.5 V - sufficient to drive 50-pF loads over 10-cm PCB traces while maintaining TTL/CMOS-compatible VOH/VOL. |
| Operating Temp | –55°C to +125°C - qualified per JEDEC HAST, temperature cycle, and autoclave testing for aerospace, defense, and downhole applications. |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds standard industrial requirements, reducing need for external protection on I/O lines. |
Pinout & Package
SN74LV244AMDWREP uses a 20-pin SOIC (DW) package with 1.27-mm pitch, 7.6-mm body width, and 2.65-mm max height - compatible with standard surface-mount assembly and IPC-7351 land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of Group 1 (pins 2–5 → 18–15) and Group 2 (pins 19–16 → 13–10); must be pulled up for power-up high-Z safety. |
| 1A1–1A4, 2A1–2A4 | Data inputs | Noninverting inputs for respective 4-bit channels; accept VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC across full VCC range. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state outputs | Buffered, noninverting outputs; enter high-impedance state when OE = high; support bus sharing without contention. |
| VCC (Pin 11), GND (Pin 10) | Power supply | Single-supply operation; decoupling capacitor required within 1 cm of pin 11 to suppress switching noise and ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Extended temperature qualification | JEDEC-compliant reliability testing (HAST, temp cycle, autoclave) confirms stable operation from –55°C to +125°C for mission-critical deployments. |
| Mixed-mode voltage interface | Allows 3.3-V microcontroller GPIOs to safely drive 5-V bus lines - eliminating discrete level translators in mixed-voltage systems. |
| Controlled ground bounce (VOLP) | Typical <0.8 V at 3.3 V - reduces false triggering on adjacent CMOS inputs during simultaneous output switching. |
| Output undershoot suppression (VOHV) | Typical >2.3 V at 3.3 V - prevents negative undershoot from violating input thresholds of downstream receivers. |
| Low dynamic power dissipation | Cpd = 14 pF at 3.3 V - minimizes switching current and heat generation in high-density PCB layouts with multiple buffers. |
Applications
| Industrial PLC Backplane Interface | Avionics Data Bus Isolation |
|---|---|
Use Scenario: Buffering address/data lines between FPGA-based controller and legacy 5-V parallel memory modules in programmable logic controllers. IC Role / Device Role / Timing Role: Noninverting octal buffer with dual OE control isolates memory bus segments and enables dynamic channel gating during DMA transfers. Use Value: 4.9-ns tpd at 5 V meets tight setup/hold timing for 20-MHz asynchronous SRAM access; Ioff prevents backfeed during hot-swap module insertion. | Use Scenario: Interfacing radiation-tolerant microprocessors to ARINC 429-compatible transceivers in flight control computers. IC Role / Device Role / Timing Role: Level-shifting and bus-driving buffer that translates 3.3-V processor outputs to robust 5-V logic levels for long-haul differential drivers. Use Value: Mixed-mode operation eliminates external level shifters; –55°C to +125°C rating satisfies DO-160E environmental test requirements. |
| Downhole Oilfield Sensor Hub | Ruggedized Test Equipment I/O Expansion |
Use Scenario: Driving multiplexed analog-to-digital converter address lines and control signals in high-temperature wellbore telemetry systems. IC Role / Device Role / Timing Role: High-reliability 3-state driver enabling shared SPI-like control busses among multiple sensor front-ends operating at 175°C ambient. Use Value: Qualified per JEDEC HAST and autoclave testing ensures >10,000-hour lifetime at 125°C junction; 2000-V HBM ESD withstand protects against field-induced transients. | Use Scenario: Expanding digital I/O count on automated test equipment (ATE) mainframes by adding isolated 8-bit bidirectional data lanes. IC Role / Device Role / Timing Role: Dual-group 3-state buffer providing software-controllable direction and channel enable for synchronized pattern generation and capture. Use Value: Independent 1OE/2OE pins allow time-multiplexed use of same physical bus for stimulus and response; 16-mA drive sustains signal integrity over 30-cm ribbon cables. |
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 |
|---|---|---|---|
| SN74LVC244APWREP | Lower VCC min (1.65 V), higher speed (tpd = 3.9 ns @ 3.3 V), but rated only to 105°C. | Suitable for commercial/industrial systems below 105°C; not qualified for extended-temp aerospace or oilfield use. | Select when operating temperature stays ≤105°C and lower supply voltage (1.65–3.6 V) is required. |
| SN74LVTH244MDWREP | Higher drive (±32 mA), TTL-compatible inputs, but no Ioff and limited to –40°C to +85°C. | Used where legacy TTL signaling or stronger fanout is needed, but lacks partial-power-down capability. | Select only if interfacing with 5-V TTL logic and thermal range is constrained to commercial grade. |
Compared with SN74LV244AMDWREP, SN74LVC244APWREP offers faster speed and lower voltage support but sacrifices extended-temperature reliability, while SN74LVTH244MDWREP provides greater drive strength and TTL compatibility at the cost of Ioff and wide-temp qualification - making SN74LV244AMDWREP the sole choice for harsh-environment 3-state buffering with power-down safety.
Availability
SN74LV244AMDWREP is available at Aetrix Electronics and suitable for industrial automation, avionics data interfaces, and downhole sensor systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for SN74LV244AMDWREP 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, precision, and long-term support.
The SN74LV244A-EP product line delivers enhanced-product (EP) versions of standard logic devices, engineered specifically for high-reliability applications demanding extended temperature operation, DMS support, and qualification pedigree.
FAQ
What is the maximum operating temperature range for SN74LV244AMDWREP?
The SN74LV244AMDWREP is fully specified from –55°C to +125°C and qualified per JEDEC standards including HAST, temperature cycling, and autoclave testing. This makes SN74LV244AMDWREP suitable for aerospace, defense, and oilfield applications where extreme thermal environments are encountered.
Does SN74LV244AMDWREP support partial-power-down functionality?
Yes, SN74LV244AMDWREP includes Ioff circuitry that disables outputs and limits off-state current to 5 µA maximum when VCC = 0 V. This feature prevents damaging current backflow during hot-swap or staged power sequencing - a critical capability confirmed in the device's Electrical Characteristics table and Functional Description section.
What is the typical propagation delay of SN74LV244AMDWREP at 5 V?
The typical propagation delay (tpd) of SN74LV244AMDWREP is 6.5 ns at 5 V, with a guaranteed maximum of 8.5 ns under recommended conditions (VCC = 5 V ± 0.5 V, TA = 25°C, CL = 50 pF). This value is explicitly listed in the Switching Characteristics table for the A→Y path.
Can SN74LV244AMDWREP interface between 3.3-V and 5-V logic domains?
Yes, SN74LV244AMDWREP supports mixed-mode voltage operation: its inputs tolerate 0–5.5 V regardless of VCC, and outputs swing rail-to-rail within VCC. When powered at 5 V, it accepts 3.3-V inputs and drives 5-V outputs; when powered at 3.3 V, it drives 3.3-V outputs compatible with 5-V-tolerant receivers - all without external level shifters.
What package type is used for SN74LV244AMDWREP?
SN74LV244AMDWREP uses a 20-pin SOIC (DW) package with 1.27-mm lead pitch, 7.6-mm body width, and 2.65-mm maximum height. The DW package is documented in TI's SC package database and matches the mechanical drawing DW0020A, including land pattern and stencil recommendations.
SN74LV244AMDWREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LV244AMDWREP FAQ
1.How can I place an order for SN74LV244AMDWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV244AMDWREP 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 SN74LV244AMDWREP reliable?
The price and inventory of SN74LV244AMDWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV244AMDWREP is usually 5 days.
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SN74LV244AMDWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV244AMDWREP 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 SN74LV244AMDWREP?
For technical support, including SN74LV244AMDWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV244AMDWREP requirements.
6.How does Aetrix verify that SN74LV244AMDWREP is sourced from the original manufacturer or authorized distributors?
All SN74LV244AMDWREP 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 SN74LV244AMDWREP meets industry standards.
7.What is the process for return or replacement of SN74LV244AMDWREP?
All SN74LV244AMDWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV244AMDWREP, 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 SN74LV244AMDWREP part is unused and in its original packaging.
Return procedure for SN74LV244AMDWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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