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Texas Instruments SN74ALVC16244AZQLR
- Part No.:
- SN74ALVC16244AZQLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74ALVC16244AZQLR.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ALVC16244AZQLR from Texas Instruments is a 16-bit non-inverting buffer/driver with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features ±24-mA output drive at 3.3 V, 3 ns max propagation delay, and symmetrical active-low output-enable inputs. It is used in memory-address buffering, clock distribution, and bus-transceiver applications in industrial and embedded systems.
For engineers reviewing the SN74ALVC16244AZQLR datasheet, SN74ALVC16244AZQLR pinout, SN74ALVC16244AZQLR application, or SN74ALVC16244AZQLR equivalent, key selection criteria include VCC operating range (1.65–3.6 V), 3-state output control timing (ten/tdis ≤ 5.7 ns at 3.3 V), output drive strength (±24 mA), thermal resistance (θJA = 42°C/W), and Pb-free VFBGA-56 (ZQL) package compatibility.
Technical Context
The SN74ALVC16244AZQLR implements four independent 4-bit buffered channels, each with true logic outputs and dedicated active-low OE inputs. Its architecture supports flexible partitioning as one 16-bit, two 8-bit, or four 4-bit buffers-enabling scalable bus loading management without signal inversion.
Input thresholds are VIL ≤ 0.35×VCC (1.65 V), VIH ≥ 0.65×VCC (1.65 V); output voltage levels meet VOH ≥ VCC – 0.2 V (IOH = –100 µA) and VOL ≤ 0.2 V (IOL = 100 µA). Latch-up immunity exceeds 250 mA per JESD 17, and ESD protection meets 2000-V HBM, 200-V MM, and 1000-V CDM standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct interface with 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| tpd Max | 3 ns at 3.3 V - ensures sub-nanosecond timing margin for high-speed address/data bus buffering. |
| Output Drive | ±24 mA at 3.3 V - drives up to 10 LVTTL loads or 20 ALVC loads without external termination. |
| IOZ (Off-State Leakage) | ±10 µA at 3.6 V - minimizes standby current in powered-down bus segments. |
| θJA | 42°C/W (ZQL package) - supports sustained 16-bit switching at ambient ≤ 85°C with standard PCB copper area. |
| ESD Rating | 2000-V HBM - provides robust handling during board assembly and field service in industrial environments. |
| Operating Temp | –40°C to +85°C - qualified for extended-temperature industrial and automotive under-hood auxiliary modules. |
Pinout & Package
The SN74ALVC16244AZQLR uses a 56-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package, marked ZQL, with 0.5-mm pitch and 7.0 mm × 4.5 mm footprint. It is Pb-free and RoHS-compliant, rated MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable | Independent control of each 4-bit channel; must be pulled high via resistor during power-up to ensure Hi-Z state. |
| 1A1–1A4, 2A1–2A4, etc. | Data inputs | True-buffered inputs per channel; CMOS-compatible thresholds scale with VCC (VIH/VIL ratios defined per supply). |
| 1Y1–1Y4, 2Y1–2Y4, etc. | 3-state outputs | Non-inverting outputs with ±24-mA sink/source capability; high-impedance when corresponding OE is high. |
| VCC (pins C3, C4, H3, H4, G1, G2, J3, J4) | Power supply | Eight distributed VCC balls reduce IR drop and improve noise immunity across 16-bit switching events. |
| GND (pins B3, B4, D3, D4, F3, F4, G3, G4, J1, J2) | Ground reference | Ten GND balls provide low-inductance return paths, critical for simultaneous switching noise (SSN) suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Widebus™ architecture | Optimized pinout and internal routing for minimal skew across all 16 outputs - essential for synchronous bus timing integrity. |
| Supply voltage scaling | Guaranteed operation from 1.65 V to 3.6 V with monotonic VIH/VIL thresholds - eliminates need for separate voltage translators in mixed-supply systems. |
| High-current 3-state outputs | ±24-mA drive at 3.3 V supports fan-out to multiple loads while maintaining VOL ≤ 0.55 V and VOH ≥ 2.0 V under full load. |
| Latch-up immunity | Exceeds 250 mA per JESD 17 - prevents destructive latch-up during hot-plug or transient overvoltage events in backplane interfaces. |
| Thermal performance | θJA = 42°C/W in ZQL package - enables full 16-bit operation at 85°C ambient with only 2-layer PCB and 1 oz copper. |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating address generation logic from capacitive bus loading; OE synchronized to chip-select strobes. Use Value: Eliminates address skew between bits and maintains setup/hold margins at 20-MHz bus rates with 3 ns tpd and matched trace lengths. | Use Scenario: Distributing a single system clock to four peripheral controllers with independent enable/disable control. IC Role / Device Role / Timing Role: Four-channel clock driver where each OE controls clock delivery to one subsystem (e.g., UART, SPI, I²C, ADC). Use Value: Enables dynamic clock gating per peripheral to reduce system power by >30% without requiring discrete logic or FPGA resources. |
| Bus Transceiver Interface | Industrial I/O Expansion |
Use Scenario: Bidirectional data transfer between a 32-bit host processor and legacy 16-bit peripheral via multiplexed address/data bus. IC Role / Device Role / Timing Role: Two SN74ALVC16244AZQLR devices configured as forward/reverse drivers, controlled by direction and chip-select signals. Use Value: Provides clean 3-state isolation during direction transitions, preventing bus contention and eliminating need for external series resistors or diodes. | Use Scenario: Expanding GPIO count on an industrial PLC controller by interfacing 16 digital input sensors to a microcontroller's limited parallel port. IC Role / Device Role / Timing Role: Input buffer aggregating sensor status (dry contact, opto-isolator outputs) into a single 16-bit parallel word read by MCU. Use Value: Supports 1.65–3.6 V input thresholds - accepts both 2.5-V and 3.3-V sensor outputs without external biasing or clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Same logic function, TSSOP-48 package (48-pin, 0.5-mm pitch), θJA = 70°C/W, lower drive (±24 mA only at 3.3 V, derated at 1.8 V). | Suitable for prototyping or low-volume boards where manual soldering or socketing is preferred; not recommended for high-density or thermally constrained layouts. | Select when board space allows larger footprint and thermal budget permits higher junction temperature rise. |
| SN74AVC16244DGGR | Higher speed (tpd = 2.2 ns at 3.3 V), supports 1.2–3.6 V operation, but reduced latch-up immunity (JESD 17 Class II, 100 mA) and no 2000-V HBM rating. | Better for ultra-high-speed memory interfaces (e.g., DDR2 command/address buses) where timing margin is critical and ESD exposure is controlled. | Choose only if sub-2.5 ns propagation delay is required and system-level ESD protection is implemented externally. |
Compared with SN74LVC16244ADGGR, SN74ALVC16244AZQLR offers superior thermal performance (42 vs. 70°C/W) and smaller footprint, while SN74AVC16244DGGR trades ESD robustness for speed - making SN74ALVC16244AZQLR optimal for industrial bus interfaces demanding reliability, density, and wide-voltage compatibility.
Availability
SN74ALVC16244AZQLR is available at Aetrix Electronics and suitable for memory-address buffering, clock distribution, and industrial I/O expansion requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for SN74ALVC16244AZQLR 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 decades of experience in high-reliability logic and interface solutions.
The SN74ALVC16244AZQLR belongs to TI's Widebus™ family, engineered specifically to increase logic density and timing performance in 3-state memory, clock, and bus-driver applications across industrial, communications, and computing platforms.
FAQ
What is the maximum operating frequency supported by the SN74ALVC16244AZQLR?
The SN74ALVC16244AZQLR does not specify a maximum clock frequency in its datasheet because it is a combinational buffer-not a clocked device. Its usable frequency limit depends on system-level timing: with 3 ns max propagation delay and typical PCB trace delays, it reliably supports address/data bus toggling up to 100 MHz in well-designed layouts. The SN74ALVC16244AZQLR is commonly deployed in 20–50 MHz memory and peripheral interfaces where setup/hold margins must be preserved across all 16 bits.
Can the SN74ALVC16244AZQLR operate at 1.8 V and still drive 24 mA?
No-the ±24-mA output drive specification for the SN74ALVC16244AZQLR applies only at VCC = 3.0 V and 3.3 V. At 1.8 V, the guaranteed output current drops to ±4 mA (IOL/IOH min), with VOL ≤ 0.45 V and VOH ≥ 1.2 V. The SN74ALVC16244AZQLR remains fully functional at 1.65–1.95 V, but users must verify load conditions and timing margins at reduced drive strength. This behavior is explicitly defined in the Recommended Operating Conditions table.
How should unused input pins be handled on the SN74ALVC16244AZQLR?
All unused inputs on the SN74ALVC16244AZQLR-including data inputs (A1–A4 per channel) and OE terminals-must be tied to a valid logic level: either VCC or GND. Floating inputs can cause increased ICC, erratic output states, or excessive power consumption due to intermediate voltage levels triggering both PMOS and NMOS transistors. TI recommends using pullup/pulldown resistors ≤ 10 kΩ for OE pins and direct connection for data inputs where possible. This requirement is stated in the Recommended Operating Conditions section.
Is the SN74ALVC16244AZQLR pin-compatible with the SN74ALVC16244ADGGR?
No-the SN74ALVC16244AZQLR (56-ball VFBGA, ZQL) and SN74ALVC16244ADGGR (48-pin TSSOP, DGG) have fundamentally different packages, pin counts, and ball/pad layouts. They share identical logic functionality and electrical specifications, but PCB footprints, thermal design, and assembly processes are incompatible. Migration requires complete board redesign. The SN74ALVC16244AZQLR is not a drop-in replacement for any TSSOP or SSOP variant.
Does the SN74ALVC16244AZQLR support hot-swap or live-insertion?
The SN74ALVC16244AZQLR is not explicitly characterized for hot-swap operation, but its robust latch-up immunity (>250 mA per JESD 17) and high ESD ratings (2000-V HBM) make it suitable for controlled hot-plug applications when combined with proper system-level protection-such as series current-limiting resistors on OE and data lines, and slew-rate-controlled power sequencing. TI's application report SCBA004 notes that CMOS inputs must avoid floating states during insertion; therefore, OE should be held inactive (high) until VCC stabilizes. The SN74ALVC16244AZQLR itself does not include integrated hot-swap circuitry.
SN74ALVC16244AZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVC
- Package/Case:
- 56-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
SN74ALVC16244AZQLR FAQ
1.How can I place an order for SN74ALVC16244AZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVC16244AZQLR 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 SN74ALVC16244AZQLR reliable?
The price and inventory of SN74ALVC16244AZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVC16244AZQLR is usually 5 days.
3.What payment methods are accepted for SN74ALVC16244AZQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVC16244AZQLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALVC16244AZQLR?
SN74ALVC16244AZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVC16244AZQLR 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 SN74ALVC16244AZQLR?
For technical support, including SN74ALVC16244AZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVC16244AZQLR requirements.
6.How does Aetrix verify that SN74ALVC16244AZQLR is sourced from the original manufacturer or authorized distributors?
All SN74ALVC16244AZQLR 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 SN74ALVC16244AZQLR meets industry standards.
7.What is the process for return or replacement of SN74ALVC16244AZQLR?
All SN74ALVC16244AZQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVC16244AZQLR, 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 SN74ALVC16244AZQLR part is unused and in its original packaging.
Return procedure for SN74ALVC16244AZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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