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Texas Instruments SN74ALVC244PWR
- Part No.:
- SN74ALVC244PWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ALVC244PWR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,526
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Product details
Overview
SN74ALVC244PWR from Texas Instruments is an octal buffer/driver with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features two independent 4-bit channels (1A→1Y and 2A→2Y), separate output-enable (1OE/2OE) controls, ±24-mA drive strength at 3.3 V, and 2.8 ns max propagation delay. It is used in bidirectional bus interfacing, level translation, and memory address/data buffering in low-voltage embedded systems.
For engineers reviewing the SN74ALVC244PWR datasheet, SN74ALVC244PWR pinout, SN74ALVC244PWR application, or SN74ALVC244PWR equivalent, key selection criteria include 3-state output control timing (ten = 4.5 ns, tdis = 4.2 ns at 3.3 V), input/output voltage compatibility across 1.65–3.6 V rails, thermal performance in TSSOP-20 (θJA = 83°C/W), and I/O capacitance (Ci = 4.5 pF, Co = 7.5 pF).
Technical Context
This device implements dual 4-bit non-inverting buffers with independent 3-state enable logic per group. Each channel operates with CMOS-compatible input thresholds (VIH = 2.0 V min at VCC = 3.0 V; VIL = 0.8 V max) and rail-to-rail output swing (VOH ≥ VCC − 0.2 V, VOL ≤ 0.55 V at 24 mA sink).
It supports hot-insertion via Ioff protection (±10 µA leakage when powered down) and meets JESD 22 ESD standards (2000-V HBM, 200-V MM). Latch-up immunity exceeds 250 mA per JESD 17, enabling robust operation in mixed-signal environments with shared supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables interoperability between 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| tpd Max | 2.8 ns at 3.3 V - Supports high-speed data transfer up to ~350 MHz system clock edge rates in buffered paths. |
| IOL / IOH | ±24 mA at 3.0 V - Drives heavy capacitive loads (e.g., >10 pF traces or multiple inputs) while maintaining signal integrity. |
| IOZ Leakage | ±10 µA at 3.6 V - Ensures minimal current draw in high-impedance state, critical for low-power standby modes. |
| Input Capacitance | 4.5 pF - Limits loading on upstream drivers, preserving rise/fall times in fan-out configurations. |
| Power Dissipation | 26 pF typical Cpd per buffer at 10 MHz - Predictable dynamic power for thermal budgeting in dense PCB layouts. |
Pinout & Package
TSSOP-20 (PW) package: 4.4 mm × 6.5 mm body, 0.65 mm pitch, 1.2 mm max height, exposed pad not present. RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C, unlimited floor life).
| 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 19,17,16,14 → 11,13,12,10); tie high via pullup for power-up high-Z safety. |
| 1A1–1A4, 2A1–2A4 | Data inputs | Non-inverting inputs for respective Y outputs; CMOS-compatible thresholds scale with VCC (VIH/VIL ratios defined per voltage band). |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state outputs | Drive bidirectional buses or isolated signal paths; high-impedance state prevents contention during bus arbitration or sleep mode. |
| VCC, GND | Supply terminals | Single-supply operation only; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pins 10 and 20 for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range | 1.65 V to 3.6 V enables drop-in replacement across 1.8 V, 2.5 V, and 3.3 V systems without redesign. |
| High drive strength | ±24 mA at 3.0 V supports driving 50 Ω transmission lines or 10+ CMOS inputs directly. |
| Low propagation delay | 2.8 ns max at 3.3 V ensures sub-ns timing margins for 100+ MHz parallel bus interfaces. |
| Ioff partial-power-down | Prevents current backflow when VCC = 0 V, allowing safe insertion/removal in live backplanes or hot-swap modules. |
| ESD robustness | 2000-V HBM rating eliminates need for external TVS diodes in standard industrial environments. |
Applications
| Memory Address Buffering | Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Isolating microcontroller address lines from SRAM/Flash memory chips with mismatched drive capability. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control synchronizes with memory read/write strobes to prevent bus contention. Use Value: Eliminates timing skew between address and control signals while supporting 3.3 V MCU ↔ 2.5 V memory voltage translation. |
Use Scenario: Extending GPIO count of an ARM Cortex-M0+ MCU to drive peripheral registers over a local parallel bus. IC Role / Device Role / Timing Role: Bidirectional data path conditioner with independent OE control per 4-bit lane for register select decoding. Use Value: Delivers 2.8 ns tpd and ±24 mA drive to meet setup/hold timing for 50 MHz peripheral access without external timing compensation. |
| FPGA I/O Voltage Translation | Industrial PLC Backplane Interface |
|
Use Scenario: Interfacing 3.3 V FPGA I/O banks to legacy 2.5 V sensor interface ASICs on the same PCB. IC Role / Device Role / Timing Role: Level-shifting buffer with rail-compatible inputs/outputs; OE tied to FPGA configuration done signal. Use Value: Achieves seamless voltage domain bridging without dedicated level translators, reducing BOM count and layout area. |
Use Scenario: Driving 24 V digital input modules from a 3.3 V PLC controller CPU board via optocoupler-isolated backplane. IC Role / Device Role / Timing Role: Robust signal repeater with ±24 mA drive and 2000-V HBM ESD protection for noisy factory-floor environments. Use Value: Maintains signal integrity across 15 cm backplane traces while surviving repeated ESD events common in industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | Lower drive (±24 mA at 3.3 V vs. ±32 mA for LVC variant); identical pinout and VCC range. | Suitable for lower-capacitance loads (<15 pF); not recommended for driving long traces or >8 downstream inputs. | Choose SN74LVC244APWR only if drive margin is sufficient and cost is primary constraint. |
| 74AVC244TTR | Higher speed (tpd = 1.8 ns at 3.3 V), but narrower VCC range (1.2 V to 3.6 V); different pinout (TSSOP-20, but shifted pin 1 location). | Required for <1 ns timing budgets; incompatible with 1.65–1.8 V systems due to minimum VCC limit. | Select 74AVC244TTR only when sub-2 ns propagation is mandatory and full 1.2–3.6 V support is needed. |
Compared with SN74LVC244APWR and 74AVC244TTR, SN74ALVC244PWR provides optimal balance of drive strength, timing margin, and broadest low-voltage compatibility (1.65 V min), making it preferred for general-purpose 1.8/2.5/3.3 V system interfacing where pin compatibility and proven reliability are prioritized over extreme speed or ultra-low voltage operation.
Availability
SN74ALVC244PWR is available at Aetrix Electronics and suitable for memory subsystems, microcontroller peripheral expansion, FPGA I/O conditioning, and industrial backplane interfaces requiring stable component supply across automotive, industrial, and communications end equipment.
Supply support for SN74ALVC244PWR 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 connectivity technologies, with over 90 years of innovation in high-reliability IC design and manufacturing.
The SN74ALVC244PWR belongs to TI's ALVC (Advanced Low-Voltage CMOS) logic family, engineered for low-noise, high-drive, wide-supply-range buffering in space-constrained, multi-rail digital systems.
FAQ
What is the maximum operating temperature for SN74ALVC244PWR?
The SN74ALVC244PWR is rated for operation from –40°C to +85°C ambient temperature. This range is validated per JEDEC JESD78 and applies to continuous operation under recommended conditions (VCC = 1.65 V to 3.6 V, load ≤ ±24 mA). Thermal derating is not required within this envelope when mounted on a standard FR-4 PCB with 2 oz copper and adequate airflow.
Does SN74ALVC244PWR support hot-swap or partial-power-down operation?
Yes, SN74ALVC244PWR includes Ioff circuitry that disables input/output paths when VCC = 0 V, limiting current flow to ±10 µA. This allows safe insertion into live backplanes or hot-swap modules without disrupting upstream logic. The feature is inherent to the ALVC process and requires no external components to activate.
Can SN74ALVC244PWR be used as a level translator between 1.8 V and 3.3 V logic domains?
Yes, SN74ALVC244PWR supports bidirectional level translation: its inputs recognize 1.8 V logic highs (VIH = 0.65 × VCC = 1.17 V min at 1.8 V), and outputs swing rail-to-rail (VOH ≥ VCC − 0.2 V). When powered at 3.3 V, it accepts 1.8 V inputs and drives 3.3 V outputs; when powered at 1.8 V, it accepts 3.3 V inputs only if clamped externally (not recommended without series resistors).
What is the recommended decoupling strategy for SN74ALVC244PWR?
Place a 0.1 µF X7R ceramic capacitor between VCC (pin 20) and GND (pin 10), located ≤5 mm from the pins. For boards with >5 devices, add one 4.7 µF tantalum or polymer capacitor per 10 devices near the power entry point. Avoid shared vias between decoupling caps and signal traces to prevent ground bounce coupling.
Is SN74ALVC244PWR pin-compatible with other TSSOP-20 octal buffers like SN74LVC244A?
Yes, SN74ALVC244PWR shares identical pinout, footprint, and terminal assignment with SN74LVC244APWR, SN74LVCH244APWR, and SN74AHC244PWR. All use the same PW package drawing (JEDEC MO-153), enabling direct substitution in existing layouts without PCB revision-provided timing and drive requirements are verified for the target application.
SN74ALVC244PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVC
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74ALVC244PWR FAQ
1.How can I place an order for SN74ALVC244PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVC244PWR 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 SN74ALVC244PWR reliable?
The price and inventory of SN74ALVC244PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVC244PWR is usually 5 days.
3.What payment methods are accepted for SN74ALVC244PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVC244PWR transactions.
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4.How is shipping managed for SN74ALVC244PWR?
SN74ALVC244PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVC244PWR 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 SN74ALVC244PWR?
For technical support, including SN74ALVC244PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVC244PWR requirements.
6.How does Aetrix verify that SN74ALVC244PWR is sourced from the original manufacturer or authorized distributors?
All SN74ALVC244PWR 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 SN74ALVC244PWR meets industry standards.
7.What is the process for return or replacement of SN74ALVC244PWR?
All SN74ALVC244PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVC244PWR, 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 SN74ALVC244PWR part is unused and in its original packaging.
Return procedure for SN74ALVC244PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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