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Texas Instruments SN74LVTH16245AZQLR
- Part No.:
- SN74LVTH16245AZQLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74LVTH16245AZQLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,232
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Product details
Overview
SN74LVTH16245AZQLR from Texas Instruments is a 3.3-V ABT 16-bit (dual-octal) noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between two 8-bit buses. It supports mixed-mode signaling (5-V inputs/outputs with 3.3-V VCC), operates down to 2.7 V, and features bus-hold circuitry eliminating external pull resistors. It is used in industrial backplane interfaces requiring level translation and hot-insertion capability.
For engineers reviewing the SN74LVTH16245AZQLR datasheet, SN74LVTH16245AZQLR pinout, SN74LVTH16245AZQLR application, or SN74LVTH16245AZQLR equivalent, key selection criteria include its 56-ball VFBGA (ZQL) package, IOFF support for hot insertion, distributed VCC/GND pins for noise suppression, flow-through architecture for PCB layout optimization, and bus-hold on all A/B-port inputs.
Technical Context
The SN74LVTH16245AZQLR implements dual-octal transceiver logic with independent DIR and OE controls per 8-bit section, enabling selective A→B or B→A data flow or full isolation. Its Advanced BiCMOS Technology (ABT) delivers TTL-compatible output drive (IOL = 64 mA, IOH = –32 mA at VCC = 3.3 V) while maintaining low static power dissipation.
It integrates power-up 3-state and IOFF circuitry to enforce high-impedance outputs during power ramping or shutdown, preventing backdrive current. Bus-hold inputs actively retain logic state without external biasing, and distributed power/ground pins minimize simultaneous switching noise in high-speed bus applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery operation and ensures compatibility with 3.3-V systems across industrial temperature range. |
| IOL / IOH | 64 mA / –32 mA at VCC = 3.3 V - drives standard TTL loads directly without buffers, enabling robust signal integrity on loaded backplanes. |
| tPLH/tPHL | 1.5 ns to 3.7 ns (VCC = 3.3 V, CL = 50 pF) - enables >200 MHz bus toggle rates in point-to-point or lightly loaded configurations. |
| Bus-Hold Current | ±750 µA max (VCC = 3.6 V) - actively maintains valid logic levels on floating inputs, removing need for external pullup/pulldown resistors and reducing BOM count. |
| IOFF | ±100 µA at VCC = 0 V - blocks current backflow during hot insertion, protecting powered subsystems when the device is unpowered. |
| VIL/VIH | 0.8 V / 2.0 V - compatible with 5-V TTL input thresholds while operating from 3.3-V supply, enabling seamless mixed-voltage interfacing. |
| θJA | 42 °C/W (ZQL package) - enables thermal management in compact, high-density layouts without forced airflow or heatsinking. |
Pinout & Package
The SN74LVTH16245AZQLR is housed in a 56-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package designated ZQL (Pb-free), measuring 7.0 mm × 4.5 mm × 0.9 mm with 0.5-mm ball pitch. The package uses area-array interconnect for optimal signal integrity and board space efficiency in high-density applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active-high) | Selects data flow direction per 8-bit section: DIR = L enables B→A; DIR = H enables A→B. |
| 1OE, 2OE | Output enable input (active-low) | Disables both A- and B-port outputs simultaneously into high-impedance state when asserted (OE = H). |
| A1–A8, B1–B8 (x2) | Bidirectional data I/O terminals | Each port supports TTL-level inputs and outputs; internal bus-hold retains state on unused lines. |
| VCC (8×) | Power supply | Distributed VCC balls reduce IR drop and high-frequency noise coupling across the die. |
| GND (8×) | Ground reference | Distributed ground balls provide low-inductance return paths, minimizing ground bounce (VOLP < 0.8 V typical). |
| NC (8×) | No internal connection | Unbonded pads; must be left unconnected on PCB - no routing or stitching required. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage interface | Accepts 5-V TTL inputs and drives 5-V loads while powered from 3.3-V VCC, eliminating level-shifter ICs in legacy-to-modern system upgrades. |
| Flow-through pinout architecture | A/B port signals enter and exit on opposite sides of the ZQL package, enabling straight-layer PCB routing and reducing trace crossovers and stubs. |
| Power-up 3-state & IOFF | Outputs remain high-Z during power ramp (VCC = 0–1.5 V) and block reverse current when unpowered - essential for live backplane replacement. |
| Bus-hold on all I/Os | Eliminates external pull resistors on unused or undriven data lines, reducing component count, board area, and potential EMI sources. |
| Distributed VCC/GND balls | Eight VCC and eight GND balls placed strategically across the array suppress simultaneous switching noise and improve PSRR above 100 MHz. |
Applications
| Industrial Backplane Interface | Legacy System Upgrade Bridge |
|---|---|
|
Use Scenario: Interfacing a 3.3-V FPGA-based controller to a legacy 5-V ISA-style peripheral bus in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing data flow between mismatched voltage domains under software-controlled DIR/OE timing. Use Value: Enables direct connection without discrete level shifters; bus-hold prevents floating states during configuration handshakes, improving boot reliability. |
Use Scenario: Integrating modern low-voltage microcontrollers into existing 5-V instrumentation racks with shared address/data buses. IC Role / Device Role / Timing Role: Asynchronous bus isolator and translator, activated only during active data cycles to minimize cross-talk and power draw. Use Value: Reduces design risk by preserving original timing margins - propagation delay (1.5–3.7 ns) adds negligible skew versus legacy 5-V transceivers. |
| Hot-Swappable Module Carrier | High-Density Data Acquisition Front-End |
|
Use Scenario: Slot-level transceiver in modular test equipment where daughter cards are inserted/removed while main chassis remains powered. IC Role / Device Role / Timing Role: Hot-insertion protected bus interface ensuring no backdrive current flows into unpowered modules during insertion. Use Value: IOFF and power-up 3-state guarantee safe insertion - eliminates need for complex sequencing circuitry or mechanical interlocks. |
Use Scenario: Signal conditioning and multiplexing stage in multi-channel oscilloscope front-end, connecting ADCs to a central processor bus. IC Role / Device Role / Timing Role: Low-noise, high-drive buffer isolating sensitive analog sampling paths from digital switching noise on shared bus traces. Use Value: Distributed VCC/GND and low ground bounce (<0.8 V) prevent digital switching artifacts from corrupting sub-mV analog measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Lower drive strength (IOL = 24 mA), no bus-hold, LVC logic family (not ABT), 48-pin TSSOP only. | Suitable for lower-speed, lower-current 3.3-V-only systems without mixed-voltage or hot-swap requirements. | Choose when cost and footprint are prioritized over 5-V compatibility and robustness in industrial environments. |
| SN74AVC16245DGVR | AVC family, supports 1.2–3.6 V VCC, higher speed (tPD ≈ 1.2 ns), but no IOFF or bus-hold, 48-pin TVSOP only. | Targeted at ultra-low-voltage, high-speed point-to-point links - not validated for hot insertion or 5-V tolerant operation. | Prefer for battery-powered portable instruments needing minimal VCC headroom and maximum toggle rate, not for backplane use. |
Compared with SN74LVC16245ADGGR and SN74AVC16245DGVR, the SN74LVTH16245AZQLR uniquely combines 5-V input tolerance, bus-hold, IOFF, and ZQL packaging - making it the only option qualified for ruggedized, mixed-voltage, hot-swappable industrial backplanes.
Availability
SN74LVTH16245AZQLR is available at Aetrix Electronics and suitable for industrial automation, test & measurement equipment, and modular embedded systems requiring stable component supply, long-term lifecycle assurance, and Pb-free compliance.
Supply support for SN74LVTH16245AZQLR 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 expertise in high-reliability logic and interface solutions.
The SN74LVTH16245AZQLR belongs to TI's Widebus™ ABT family, engineered specifically for robust, mixed-voltage bus interfacing in industrial, telecom, and computing infrastructure where signal integrity, hot-swap safety, and long-term supply stability are critical.
FAQ
What is the operating temperature range for the SN74LVTH16245AZQLR?
The SN74LVTH16245AZQLR is rated for operation from –40°C to +85°C, matching the commercial/industrial grade specification for the ZQL package variant. This range is explicitly confirmed in TI's ordering information table and recommended operating conditions, supporting deployment in factory-floor controllers and outdoor instrumentation without derating.
Does the SN74LVTH16245AZQLR support hot insertion, and how is it implemented?
Yes, the SN74LVTH16245AZQLR supports hot insertion via two integrated features: IOFF circuitry disables outputs when VCC = 0 V to block backdrive current, and power-up 3-state forces outputs into high-impedance during VCC ramp (0–1.5 V). Both mechanisms are verified in TI's datasheet electrical characteristics and functional description sections.
Can the SN74LVTH16245AZQLR interface directly with 5-V logic while powered from 3.3 V?
Yes - the SN74LVTH16245AZQLR accepts 5-V TTL-level inputs (VI up to 5.5 V) and drives 5-V loads (VO up to VCC + 0.5 V) while operating from a 3.3-V supply. This mixed-mode capability is explicitly specified in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the official datasheet.
What is the purpose of the NC (no-connect) balls on the SN74LVTH16245AZQLR ZQL package?
The eight NC balls on the SN74LVTH16245AZQLR (positions A1–A4, K2–K4) are unconnected internal pads. Per TI's terminal assignment diagram, they must remain unpopulated on the PCB - no solder mask opening, no copper pad, and no routing. Their presence accommodates die layout constraints without affecting functionality or thermal performance.
How does bus-hold functionality work on the SN74LVTH16245AZQLR, and why is it beneficial?
Bus-hold circuitry on the SN74LVTH16245AZQLR uses weak feedback transistors to maintain the last-valid logic state on any A- or B-port input that floats. As specified in the Electrical Characteristics table (II(hold) ±750 µA), it eliminates external pull resistors - reducing BOM cost, PCB area, and potential noise coupling points in high-density designs.
SN74LVTH16245AZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 56-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
SN74LVTH16245AZQLR FAQ
1.How can I place an order for SN74LVTH16245AZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH16245AZQLR 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 SN74LVTH16245AZQLR reliable?
The price and inventory of SN74LVTH16245AZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH16245AZQLR is usually 5 days.
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Once your SN74LVTH16245AZQLR 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 SN74LVTH16245AZQLR?
For technical support, including SN74LVTH16245AZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH16245AZQLR requirements.
6.How does Aetrix verify that SN74LVTH16245AZQLR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH16245AZQLR 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 SN74LVTH16245AZQLR meets industry standards.
7.What is the process for return or replacement of SN74LVTH16245AZQLR?
All SN74LVTH16245AZQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH16245AZQLR, 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 SN74LVTH16245AZQLR part is unused and in its original packaging.
Return procedure for SN74LVTH16245AZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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