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Texas Instruments SN74AUCH16244GQLR
- Part No.:
- SN74AUCH16244GQLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74AUCH16244GQLR.pdf
- Description:
- IC BUFFER NON-INVERT 2.7V 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,342
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Product details
Overview
SN74AUCH16244GQLR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, optimized for 1.65–1.95 V operation, delivering 1.8 ns max propagation delay at 1.8 V, ±8 mA output drive, and bus-hold inputs eliminating external resistors. It serves as a high-density memory address or clock driver in low-voltage server and telecom backplane interfaces.
For engineers reviewing the SN74AUCH16244GQLR datasheet, SN74AUCH16244GQLR pinout, SN74AUCH16244GQLR application, or SN74AUCH16244GQLR equivalent, key selection criteria include Ioff-enabled partial-power-down support, 3.6-V I/O tolerance for mixed-mode interfacing, sub-1-V operability down to 0.8 V, and VFBGA-48 (GQL) package compatibility with high-pin-count space-constrained PCB layouts.
Technical Context
This device implements four independent 4-bit buffered channels, each with symmetrical active-low output-enable (OE) control and true (noninverting) logic. Its bus-hold circuitry actively maintains valid logic states on undriven inputs without external biasing.
The Ioff feature disables all outputs during power-down, blocking reverse current flow and enabling safe hot-insertion in multi-rail systems. Absolute maximum ratings confirm 3.6-V I/O tolerance and –0.5 V to 3.6 V input/output voltage range, supporting interoperability with higher-voltage logic domains while operating from a 1.8-V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 0.8 V to 2.7 V; fully specified for 1.65–1.95 V, enabling direct integration into 1.8-V core logic domains. |
| Max Propagation Delay | 1.8 ns at 1.8 V; ensures timing-critical signal routing in high-speed address/data buses. |
| Output Drive Strength | ±8 mA at 1.8 V; sufficient to drive 50-Ω transmission lines or fan-out to ≥10 LVTTL loads. |
| Ioff Support | Enables partial-power-down mode; prevents backflow current when VCC = 0 V, critical for hot-swap and power-gated subsystems. |
| Bus-Hold Inputs | Eliminates need for external pullup/pulldown resistors; reduces BOM count and layout area in floating-bus applications. |
| I/O Voltage Tolerance | 3.6 V tolerant; allows safe interfacing with 3.3-V or 2.5-V peripherals without level shifters. |
| ICC Max | 20 µA; ultra-low static power enables use in always-on monitoring circuits and battery-backed modules. |
Pinout & Package
VFBGA-48 (GQL) package: 6 × 6 mm, 0.5-mm pitch, bottom-terminal array with exposed thermal pad; JEDEC MO-153 compliant, optimized for automated assembly and thermal dissipation in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Data inputs (16 total) | True-input terminals for four independent 4-bit channels; each group accepts 0.8–2.7 V logic signals. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | 3-state outputs (16 total) | Noninverting buffered outputs; enter high-impedance state when corresponding OE is high. |
| 1OE, 2OE, 3OE, 4OE | Active-low output enables | Independent per-channel enable control; must be pulled high via resistor during power-up to ensure defined Hi-Z state. |
| VCC, GND | Power and ground | Four VCC and six GND pins distributed across package for low-impedance supply delivery and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-1-V operability | Functional down to 0.8 V VCC, enabling compatibility with emerging ultra-low-voltage SoC I/O domains. |
| 3.6-V I/O tolerance | Supports mixed-mode signaling without level translators-critical for bridging legacy 3.3-V peripherals to 1.8-V processors. |
| Integrated bus-hold | Removes requirement for 10-kΩ external pull resistors on unused data lines, reducing component count and board area. |
| Ioff protection | Prevents damaging current flow from live I/Os into powered-down VCC rails, satisfying JESD78 Class II latch-up requirements. |
| Low dynamic power | 25 pF typical Cpd at 10 MHz enables <1 mW per channel switching power in high-frequency address buffering. |
Applications
| Memory Address Buffering | High-Speed Clock Distribution |
|---|---|
Use Scenario: Driving parallel address lines from an ASIC to multiple DDR SDRAM banks in a 1U server blade. IC Role / Device Role / Timing Role: Noninverting 16-bit buffer providing fan-out and noise isolation between controller and memory modules. Use Value: 1.8 ns tpd ensures setup/hold margin preservation across 200-MHz address strobes; bus-hold prevents floating inputs during memory refresh cycles. | Use Scenario: Distributing a 100-MHz system clock to four FPGA configuration banks with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, 3-state-capable clock driver enabling dynamic clock gating per bank. Use Value: Symmetrical OE control allows synchronized clock enable/disable; ±8-mA drive sustains signal integrity over 8-cm FR4 traces. |
| Hot-Swappable Backplane Interface | Low-Power Industrial Controller I/O Expansion |
Use Scenario: Interfacing a hot-pluggable mezzanine card's 16-bit data bus to a mainboard's 1.8-V processor bus. IC Role / Device Role / Timing Role: Level-shifting buffer with Ioff and 3.6-V I/O tolerance ensuring safe insertion/removal under power. Use Value: Ioff blocks backfeed from live 3.3-V backplane lines into unpowered card VCC; 3.6-V tolerance avoids clamping diode conduction. | Use Scenario: Expanding GPIO count on a battery-powered PLC controller using a 1.8-V microcontroller. IC Role / Device Role / Timing Role: Low-quiescent-current buffer isolating MCU pins from noisy industrial sensor/actuator loads. Use Value: 20-µA ICC extends battery life; bus-hold maintains defined logic state during MCU sleep modes without external biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Higher VCC min (1.65 V), 3.6-V tolerant, but no bus-hold; 3.5 ns tpd at 3.3 V. | Lacks bus-hold, requiring external resistors; better suited for fixed-configuration 3.3-V systems. | Select when cost sensitivity outweighs board-area savings from bus-hold, and 3.3-V operation is primary. |
| SN74AVC16244DGGR | Wider VCC range (1.2–3.6 V), 2.1 ns tpd at 1.8 V, includes bus-hold, but no Ioff support. | Missing Ioff limits use in partial-power-down or hot-swap systems; higher drive (±12 mA). | Choose for higher-speed 1.8-V designs where Ioff is not required and stronger drive is needed. |
Compared with SN74LVC16244ADGGR and SN74AVC16244DGGR, the SN74AUCH16244GQLR uniquely combines Ioff, bus-hold, and sub-1-V operation-making it the only option qualified for ultra-low-voltage, hot-pluggable, and resistor-free implementations.
Availability
SN74AUCH16244GQLR is available at Aetrix Electronics and suitable for memory address buffering, high-speed clock distribution, hot-swappable backplane interfaces, and low-power industrial controller I/O expansion requiring stable component supply and long-term lifecycle assurance.
Supply support for SN74AUCH16244GQLR 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 ICs.
The SN74AUCH16244GQLR belongs to TI's Widebus™ family-designed specifically to improve density and performance of 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters in advanced computing and communications infrastructure.
FAQ
What is the minimum supply voltage for reliable operation of the SN74AUCH16244GQLR?
The SN74AUCH16244GQLR is fully specified from 0.8 V to 2.7 V VCC, with recommended operation between 1.65 V and 1.95 V. At 0.8 V, it meets all AC/DC specifications including 5.4 ns max tpd and ±0.7 mA output drive. This sub-1-V capability makes SN74AUCH16244GQLR suitable for ultra-low-power domains where other 16-bit buffers fail to function.
Does the SN74AUCH16244GQLR support hot-swap applications?
Yes, the SN74AUCH16244GQLR supports hot-swap via its Ioff feature, which disables outputs and blocks reverse current flow when VCC = 0 V. Combined with 3.6-V I/O tolerance, this allows safe connection to live backplanes. The SN74AUCH16244GQLR also exceeds JESD 78 Class II latch-up immunity (>100 mA), making it robust in transient-prone insertion scenarios.
How does the bus-hold circuit in the SN74AUCH16244GQLR eliminate external resistors?
The SN74AUCH16244GQLR integrates active bus-hold circuitry on all 16 data inputs, which sources or sinks current to maintain the last-valid logic state when inputs float. This eliminates the need for discrete 10-kΩ pullup/pulldown resistors-reducing BOM cost, PCB area, and potential signal integrity issues from stubs or mismatched terminations in the SN74AUCH16244GQLR design.
What is the thermal performance of the SN74AUCH16244GQLR in its VFBGA-48 package?
The SN74AUCH16244GQLR in the GQL package has a θJA of 42°C/W, significantly lower than the 70°C/W of the TSSOP (DGG) and 58°C/W of the TVSOP (DGV) variants. This enhanced thermal efficiency stems from the VFBGA's bottom-terminated construction and internal thermal pad, allowing sustained operation at full drive strength in compact, thermally constrained environments where the SN74AUCH16244GQLR is deployed.
Can the SN74AUCH16244GQLR be used as four independent 4-bit buffers?
Yes, the SN74AUCH16244GQLR is architecturally partitioned into four independent 4-bit sections (Channels 1–4), each with dedicated inputs (1A1–1A4, etc.), outputs (1Y1–1Y4, etc.), and active-low output-enable (1OE–4OE). This allows flexible configuration-as four 4-bit, two 8-bit, or one 16-bit buffer-without inter-channel crosstalk, making the SN74AUCH16244GQLR highly adaptable to diverse bus architectures.
SN74AUCH16244GQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUCH
- 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:
- 9mA, 9mA
- Voltage - Supply:
- 0.8V ~ 2.7V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
SN74AUCH16244GQLR FAQ
1.How can I place an order for SN74AUCH16244GQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUCH16244GQLR 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 SN74AUCH16244GQLR reliable?
The price and inventory of SN74AUCH16244GQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUCH16244GQLR is usually 5 days.
3.What payment methods are accepted for SN74AUCH16244GQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AUCH16244GQLR transactions.
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4.How is shipping managed for SN74AUCH16244GQLR?
SN74AUCH16244GQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AUCH16244GQLR 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 SN74AUCH16244GQLR?
For technical support, including SN74AUCH16244GQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUCH16244GQLR requirements.
6.How does Aetrix verify that SN74AUCH16244GQLR is sourced from the original manufacturer or authorized distributors?
All SN74AUCH16244GQLR 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 SN74AUCH16244GQLR meets industry standards.
7.What is the process for return or replacement of SN74AUCH16244GQLR?
All SN74AUCH16244GQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUCH16244GQLR, 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 SN74AUCH16244GQLR part is unused and in its original packaging.
Return procedure for SN74AUCH16244GQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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