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Texas Instruments SN74LVC16244ADLR
- Part No.:
- SN74LVC16244ADLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC16244ADLR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:872
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Product details
Overview
SN74LVC16244ADLR from Texas Instruments is a 16-bit noninverting 3-state buffer/driver with four independent 4-bit sections, operating from 1.65 V to 3.6 V supply, supporting 5.5-V-tolerant inputs and delivering ≤4.6 ns propagation delay at 3.3 V - used in memory address buffering, bus isolation, and mixed-voltage level translation between 3.3-V logic and 5-V peripherals.
For engineers reviewing the SN74LVC16244ADLR datasheet, SN74LVC16244ADLR pinout, SN74LVC16244ADLR application, or SN74LVC16244ADLR equivalent, key selection considerations include its quad 4-bit 3-state architecture, Ioff live-insertion support, ±24-mA output drive at 3.3 V, thermal performance in SSOP-48 (RθJA = 68.4°C/W), and compatibility with TSSOP/TVSOP alternatives for layout flexibility.
Technical Context
This device implements four independent 4-bit noninverting buffers, each controlled by an active-low output-enable (OE) input (1OE–4OE), enabling selective bus section isolation. All inputs tolerate up to 5.5 V regardless of VCC, allowing direct interfacing with 5-V signal sources while powered from 3.3-V or lower rails.
It features Ioff protection that disables all outputs and isolates inputs when VCC = 0 V, preventing back-drive current during partial power-down. Output ground bounce (VOLP) remains <0.8 V and VOH undershoot >2 V at VCC = 3.3 V, ensuring signal integrity in high-speed digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation across low-voltage logic families including LVTTL and LVCMOS. |
| Input Voltage Tolerance | Up to 5.5 V - enables robust level translation from legacy 5-V systems without external resistors or translators. |
| tpd Max | 4.6 ns at VCC = 3.3 V, TA = –40°C to 125°C - ensures timing-critical bus driving in servers and telecom infrastructure. |
| IOL/IOH Max | ±24 mA per output at VCC = 3.0 V - drives moderate capacitive loads (e.g., 30–50 pF) with fast edge rates and minimal distortion. |
| Ioff | ±20 μA at VI/VO = 5.5 V, VCC = 0 V - guarantees safe hot-plug and partial-power-down operation in modular backplanes. |
| Operating Temperature | –40°C to 125°C - qualified for industrial and extended-temperature embedded applications including network switches and set-top boxes. |
| ESD Rating | 2000-V HBM, 1000-V CDM - meets JEDEC JESD22-A114 and JESD22-C101 for reliable handling in automated assembly. |
Pinout & Package
SN74LVC16244ADLR uses a 48-pin SSOP (DL) package measuring 15.88 mm × 7.49 mm, with 0.635-mm lead pitch and gull-wing leads compatible with standard reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output enable (4×) | Individually disables corresponding 4-bit buffer section; enables true 3-state isolation per group. |
| 1A1–4A4 | Input (16×) | 5.5-V-tolerant CMOS inputs accepting 1.65–3.6-V logic levels or higher voltage signals. |
| 1Y1–4Y4 | Noninverting buffered output (16×) | High-drive (±24 mA) 3-state outputs with controlled VOLP/VOHV for clean signal transmission. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four dedicated VCC pins reduce IR drop and improve noise immunity across wide bus layouts. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths essential for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 4-bit 3-state architecture | Enables flexible partitioning - use as one 16-bit, two 8-bit, or four independent 4-bit buffers with per-section OE control. |
| 5.5-V tolerant inputs | Eliminates need for external level-shifting components when interfacing with 5-V microcontrollers or legacy peripherals. |
| Ioff partial-power-down protection | Prevents damaging current flow during hot-swap or system sleep modes, critical for modular server and telecom designs. |
| Low ground bounce & undershoot | VOLP < 0.8 V and VOHV > 2 V at 3.3 V ensure signal fidelity on shared PCB traces and reduce EMI risk. |
| Mixed-mode signal operation | Supports simultaneous 3.3-V VCC and 5-V input/output voltages - simplifies integration into heterogeneous voltage-domain systems. |
Applications
| Memory Address Buffering | Bus Isolation in Network Switches |
|---|---|
|
Use Scenario: Driving address lines from a 3.3-V CPU to multiple 5-V SRAM or Flash devices in a multi-chip module. IC Role / Device Role / Timing Role: Noninverting 16-bit buffer with per-group OE control, translating 3.3-V address signals to 5-V-compatible levels while maintaining timing integrity. Use Value: Eliminates discrete level shifters; tpd ≤4.6 ns ensures no added latency in memory access cycles. |
Use Scenario: Isolating control buses between line-card ASICs and management MCU in a modular Ethernet switch chassis. IC Role / Device Role / Timing Role: Quad 4-bit 3-state driver enabling dynamic segmentation of I²C, SPI, or GPIO buses under firmware control. Use Value: Ioff prevents back-drive during hot-swap; 8-GND-pin layout minimizes crosstalk in dense backplane routing. |
| Mixed-Voltage Peripheral Interface | Industrial I/O Expansion |
|
Use Scenario: Interfacing a 3.3-V FPGA I/O bank to legacy 5-V sensors, displays, or actuators in factory automation equipment. IC Role / Device Role / Timing Role: Level-translating buffer with 5.5-V-tolerant inputs and 3.3-V-driven outputs, configured as four independent 4-bit groups. Use Value: Single-component solution replaces resistor-based translators; ±24-mA drive supports LED indicators and relay drivers directly. |
Use Scenario: Expanding digital I/O count on a PLC mainboard using isolated 3.3-V microcontroller and 24-V field-side peripherals. IC Role / Device Role / Timing Role: High-current buffer stage between MCU GPIO and optocoupler/level-shifter inputs, with OE-controlled section disable. Use Value: Robust ESD rating (2000-V HBM) withstands industrial environments; 125°C rating supports enclosed cabinet operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | TSSOP-48 package (12.50 mm × 6.10 mm); RθJA = 64.3°C/W; same electrical specs and pinout. | Better thermal performance and smaller footprint than SSOP; preferred for space-constrained PCBs with adequate airflow. | Select when board area is limited and thermal margin allows TSSOP mounting; identical logic function and timing. |
| SN74LVC16244ADGVR | TVSOP-48 package (9.70 mm × 4.40 mm); RθJA = 78.4°C/W; same logic and DC specs. | Smallest footprint option but higher thermal resistance; suitable for low-power or intermittent-duty applications. | Choose for ultra-dense layouts where thermal load is low (<100 mW total dissipation) and reflow profile accommodates fine-pitch leads. |
Compared with SN74LVC16244ADLR, the TSSOP (DGGR) offers superior thermal dissipation in compact form, while the TVSOP (DGVR) maximizes board density at the cost of thermal headroom - all three share identical pinout, timing, and logic behavior, enabling direct substitution based on mechanical constraints.
Availability
SN74LVC16244ADLR is available at Aetrix Electronics and suitable for servers, network switches, and industrial I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC16244ADLR 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 logic solutions, with decades of expertise in high-reliability interface and buffer ICs.
The SN74LVC16244A belongs to TI's Widebus™ family, designed specifically to improve density and performance of 3-state memory address drivers, clock distribution networks, and bus-oriented receivers/transmitters in computing and communications infrastructure.
FAQ
What is the maximum operating temperature for SN74LVC16244ADLR?
The SN74LVC16244ADLR is rated for continuous operation from –40°C to +125°C ambient temperature, validated per JEDEC JESD78 and supported by thermal data showing RθJA = 68.4°C/W in its SSOP-48 package - making it suitable for enclosed industrial and telecom environments where passive cooling dominates.
Does SN74LVC16244ADLR support level translation between 3.3-V and 5-V logic?
Yes, SN74LVC16244ADLR supports down-translation: its inputs accept voltages up to 5.5 V regardless of VCC (1.65–3.6 V), allowing direct connection to 5-V signal sources while powered from 3.3 V - no external resistors or translators needed, and outputs remain compatible with 3.3-V logic thresholds.
How many output-enable (OE) inputs does SN74LVC16244ADLR have?
SN74LVC16244ADLR has four active-low output-enable inputs - 1OE, 2OE, 3OE, and 4OE - each controlling a dedicated 4-bit buffer section (e.g., 1OE enables/disables outputs 1Y1–1Y4), enabling granular bus segmentation and dynamic power gating in complex digital systems.
What is the typical propagation delay of SN74LVC16244ADLR at 3.3 V?
The typical propagation delay (tpd) of SN74LVC16244ADLR is 4.1 ns at VCC = 3.3 V and TA = 25°C, with a maximum of 4.6 ns across the full –40°C to 125°C range - verified under 30-pF load and ±0.3-V transition thresholds, ensuring predictable timing in high-speed address and control buses.
Is SN74LVC16244ADLR compatible with hot-swap or live-insertion systems?
Yes, SN74LVC16244ADLR includes Ioff circuitry that disables all outputs and blocks current flow when VCC = 0 V, preventing back-drive and latch-up during live insertion - a key requirement for modular server blades, telecom line cards, and field-replaceable units certified to GR-63-CORE.
SN74LVC16244ADLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74LVC16244ADLR FAQ
1.How can I place an order for SN74LVC16244ADLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC16244ADLR 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 SN74LVC16244ADLR reliable?
The price and inventory of SN74LVC16244ADLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC16244ADLR is usually 5 days.
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SN74LVC16244ADLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC16244ADLR 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 SN74LVC16244ADLR?
For technical support, including SN74LVC16244ADLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC16244ADLR requirements.
6.How does Aetrix verify that SN74LVC16244ADLR is sourced from the original manufacturer or authorized distributors?
All SN74LVC16244ADLR 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 SN74LVC16244ADLR meets industry standards.
7.What is the process for return or replacement of SN74LVC16244ADLR?
All SN74LVC16244ADLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC16244ADLR, 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 SN74LVC16244ADLR part is unused and in its original packaging.
Return procedure for SN74LVC16244ADLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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