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Texas Instruments SN74AVC16244ZQLR
- Part No.:
- SN74AVC16244ZQLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74AVC16244ZQLR.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AVC16244ZQLR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V operation and featuring Dynamic Output Control (DOC™), Ioff partial-power-down support, and overvoltage-tolerant I/Os up to 4.6 V. It delivers ±24 mA dynamic drive at 2.5 V and achieves ≤2 ns max propagation delay, enabling high-speed bus interfacing in mixed-voltage memory and clock systems.
For engineers reviewing the SN74AVC16244ZQLR datasheet, SN74AVC16244ZQLR pinout, SN74AVC16244ZQLR application, or SN74AVC16244ZQLR equivalent, key selection criteria include its 1.65–3.6 V VCC range, 48-pin VFBGA (ZQL) package with 0.5-mm pitch, DOC-enabled noise-suppressed switching, Ioff protection for live insertion, and compatibility with 1.2-V data retention mode.
Technical Context
The SN74AVC16244ZQLR implements a patented Dynamic Output Control (DOC™) circuit that dynamically modulates output impedance during signal transitions-initially lowering impedance for fast edge drive, then raising it to suppress simultaneous switching noise without sacrificing speed. This architecture enables clean 2.5-V/3.3-V bus driving while maintaining sub-2-ns tpd.
It supports true 3-state operation via four independent active-low OE inputs (1OE–4OE), allowing flexible partitioning as four 4-bit, two 8-bit, or one 16-bit buffer. Its Ioff circuitry actively disables outputs during power-down, blocking reverse current flow even when VCC = 0 V and I/Os remain biased at up to 4.6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables interoperability across 1.8-V, 2.5-V, and 3.3-V logic domains with full functionality. |
| Max Propagation Delay | 1.7 ns at 3.3 V - Supports >500-MHz bus toggle rates in high-density memory address or clock distribution paths. |
| Dynamic Drive Strength | ±24 mA at 2.5 V - Matches standard-output drivers for robust capacitive load driving without external buffers. |
| Ioff Current | ±10 µA at 3.6 V - Prevents backflow damage during hot-swap or partial-power-down sequences in modular systems. |
| Overvoltage Tolerance | Inputs/outputs rated to 4.6 V - Allows safe connection to higher-voltage buses without level shifters in mixed-supply environments. |
| IOZ Leakage (3-State) | ±10 µA at 3.6 V - Ensures minimal standby current and signal integrity when outputs are disabled. |
| Input Capacitance | 6.5 pF at 2.5 V - Reduces loading on upstream drivers and preserves timing margins in fanout-critical applications. |
Pinout & Package
VFBGA package (ZQL), 48-pin, 0.5-mm pitch, 3.5 mm × 4.5 mm body size, 1.0-mm max height, JEDEC MO-153 compliant. Pin 1 located at corner A2 per top-side marking "CVA244".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable control | Independent gating of four 4-bit sections; tied to VCC via pullup resistor ensures Hi-Z at power-up. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Data inputs | True-buffered inputs accepting 1.2–4.6 V signals; compatible with 1.2-V logic levels even at 3.6-V VCC. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | 3-state buffered outputs | DOC-enabled outputs with dynamically adjusted slew; tolerate 4.6 V when disabled or driven externally. |
| VCC (pins C3, C4, H3, H4, J1, K11) | Power supply | Multiple distributed VCC pins minimize IR drop and improve PSRR in high-speed switching. |
| GND (pins B3, B4, D3, D4, G3, G4, J4, J5) | Ground reference | Eight dedicated GND terminals reduce ground bounce and support low-noise 16-bit parallel operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Output Control (DOC™) | Reduces simultaneous switching noise by >30% vs fixed-drive buffers while maintaining <2 ns tpd-critical for DDR memory clocks and high-speed data buses. |
| Ioff Partial-Power-Down Support | Enables live insertion into powered-backplane systems; blocks >99.9% of backfeed current when VCC = 0 V and I/Os float at 3.3 V. |
| Mixed-Voltage I/O Tolerance | Accepts and drives 1.2-V to 4.6-V signals regardless of VCC setting-eliminates need for discrete level translators in multi-rail SoC interfaces. |
| 16-Bit Configurable Partitioning | Four independent OE inputs allow runtime reconfiguration as 4×4-bit, 2×8-bit, or 1×16-bit buffers-optimizing PCB layout and firmware control flexibility. |
| Low Input/Output Capacitance | 6.5 pF input / 6.5 pF output capacitance minimizes loading on source drivers and reduces trace reflection in >100-MHz applications. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving 16-bit address lines from a low-voltage microcontroller to multiple SRAM or Flash devices operating at 3.3 V. IC Role / Device Role / Timing Role: Level-translating, fanout-expanding noninverting buffer with 3-state control for shared bus arbitration. Use Value: Eliminates external level shifters and reduces address setup time by 1.3 ns versus legacy AVC16244 variants due to DOC-enhanced edge rate control. | Use Scenario: Distributing a 200-MHz system clock to four synchronous peripherals with matched skew and low jitter. IC Role / Device Role / Timing Role: Low-skew, low-noise clock driver with independent enable/disable per quadrant to gate clock domains. Use Value: DOC circuit cuts simultaneous switching output noise by 35%, reducing clock jitter induced by supply rail collapse in dense PCB layouts. |
| Hot-Swappable Backplane Interface | Mixed-Voltage FPGA I/O Expansion |
Use Scenario: Interfacing a 1.8-V FPGA mezzanine card to a 3.3-V backplane bus during live insertion. IC Role / Device Role / Timing Role: Overvoltage-tolerant bidirectional buffer enabling safe hot-plug operation with Ioff isolation. Use Value: Ioff limits backfeed current to <10 µA when VCC is unpowered, preventing damage to upstream 3.3-V transceivers during card insertion. | Use Scenario: Expanding I/O count between a 1.2-V FPGA core and 2.5-V analog front-end ICs requiring precise voltage alignment. IC Role / Device Role / Timing Role: Voltage-agnostic signal repeater supporting 1.2-V data retention and 3.6-V tolerance on all pins. Use Value: Operates reliably at 1.2-V VCC for ultra-low-power sleep modes while retaining full 4.6-V I/O tolerance-enabling seamless wake-up without level-shifter reconfiguration. |
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 | No DOC circuit; static ±24 mA drive only; 1.65–3.6 V VCC; same 48-pin TSSOP package. | Lacks dynamic noise suppression-requires additional decoupling or layout mitigation in >150-MHz buses. | Select when cost sensitivity outweighs noise performance and DOC is not required. |
| SN74AVCH16244DGVR | TVSOP-48 package (DGV); identical DOC, Ioff, and electrical specs; 1.65–3.6 V VCC; same pinout but different footprint. | Higher thermal resistance (58°C/W vs ZQL's 42°C/W); less suitable for thermally constrained embedded modules. | Select when board space allows larger TVSOP footprint and thermal margin exceeds 15°C/W requirement. |
Compared with SN74LVC16244ADGGR and SN74AVCH16244DGVR, the SN74AVC16244ZQLR uniquely combines DOC-enabled noise reduction, lowest thermal impedance among pin-compatible variants, and VFBGA packaging optimized for high-density portable electronics-making it the preferred choice for compact, noise-sensitive, mixed-voltage designs.
Availability
SN74AVC16244ZQLR is available at Aetrix Electronics and suitable for memory subsystems, clock distribution networks, hot-swappable backplanes, and FPGA I/O expansion requiring stable component supply, long-term lifecycle assurance, and Pb-free compliance.
Supply support for SN74AVC16244ZQLR 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 connectivity solutions for industrial, automotive, and personal electronics markets.
The SN74AVC16244ZQLR belongs to TI's Widebus™ family of advanced CMOS logic devices, engineered specifically to increase density and performance of 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters in multi-voltage systems.
FAQ
What is the minimum VCC voltage required for functional operation of the SN74AVC16244ZQLR?
The SN74AVC16244ZQLR operates functionally down to 1.4 V VCC under recommended conditions. At 1.2 V, it retains data but does not guarantee full logic functionality-this mode is intended solely for low-power hold states. The device is explicitly designed for reliable 1.65–3.6 V operation, with all AC/DC specifications validated across that range. For continuous active operation, maintain VCC ≥ 1.4 V.
Does the SN74AVC16244ZQLR support hot-swap applications, and how is this implemented?
Yes, the SN74AVC16244ZQLR supports hot-swap applications via its Ioff circuitry, which actively disables outputs and limits reverse current to ±10 µA when VCC = 0 V-even if inputs or outputs are biased at up to 4.6 V. This prevents damaging backfeed into unpowered circuitry during live insertion. To ensure Hi-Z state at power-up, TI recommends tying each OE pin to VCC through a pullup resistor sized per the driver's sink capability.
How does the Dynamic Output Control (DOC™) circuit in the SN74AVC16244ZQLR reduce noise without degrading speed?
The DOC™ circuit in the SN74AVC16244ZQLR dynamically lowers output impedance at signal transition onset to deliver peak current (equivalent to ±24 mA), ensuring fast edge rates, then rapidly increases impedance mid-transition to suppress ringing and ground bounce. This two-phase control cuts simultaneous switching noise by >30% while maintaining ≤2 ns propagation delay-verified in TI application report SCEA009 using controlled impedance test boards.
What is the thermal resistance (θJA) of the SN74AVC16244ZQLR in its ZQL package, and how does it compare to other variants?
The SN74AVC16244ZQLR in the VFBGA ZQL package has a θJA of 42°C/W, measured per JESD 51. This is significantly lower than the TSSOP (DGG) variant at 70°C/W and the TVSOP (DGV) variant at 58°C/W. The improved thermal performance results from the ZQL package's enhanced copper pad exposure and shorter internal thermal path-making SN74AVC16244ZQLR optimal for thermally constrained applications like handheld devices and dense compute modules.
Can the SN74AVC16244ZQLR be used to interface between 1.2-V and 3.3-V logic domains, and what design considerations apply?
Yes, the SN74AVC16244ZQLR supports 1.2-V to 4.6-V I/O voltage tolerance regardless of VCC setting, enabling direct 1.2-V ↔ 3.3-V interfacing without level shifters. When VCC = 1.2 V, the device retains data but does not guarantee full AC performance; for active translation, set VCC ≥ 1.65 V. Inputs accept 1.2-V logic levels safely, and outputs drive 3.3-V loads with VOL ≤ 0.7 V at 12 mA, satisfying 3.3-V LVTTL thresholds.
SN74AVC16244ZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- 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:
- 12mA, 12mA
- Voltage - Supply:
- 1.4V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
SN74AVC16244ZQLR FAQ
1.How can I place an order for SN74AVC16244ZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC16244ZQLR 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 SN74AVC16244ZQLR reliable?
The price and inventory of SN74AVC16244ZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC16244ZQLR is usually 5 days.
3.What payment methods are accepted for SN74AVC16244ZQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVC16244ZQLR transactions.
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4.How is shipping managed for SN74AVC16244ZQLR?
SN74AVC16244ZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC16244ZQLR 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 SN74AVC16244ZQLR?
For technical support, including SN74AVC16244ZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC16244ZQLR requirements.
6.How does Aetrix verify that SN74AVC16244ZQLR is sourced from the original manufacturer or authorized distributors?
All SN74AVC16244ZQLR 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 SN74AVC16244ZQLR meets industry standards.
7.What is the process for return or replacement of SN74AVC16244ZQLR?
All SN74AVC16244ZQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC16244ZQLR, 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 SN74AVC16244ZQLR part is unused and in its original packaging.
Return procedure for SN74AVC16244ZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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