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Texas Instruments SN74ALVTHR16245VR
- Part No.:
- SN74ALVTHR16245VR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ALVTHR16245VR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ALVTHR16245VR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for 2.5-V/3.3-V VCC operation and mixed-mode 5-V interface compatibility. It features ±12 mA drive strength at 3.3 V, integrated 30-Ω output series resistors, bus-hold circuitry on all data inputs, and Ioff/power-up 3-state support for hot insertion in backplane or modular systems.
For engineers reviewing the SN74ALVTHR16245VR datasheet, SN74ALVTHR16245VR pinout, SN74ALVTHR16245VR application, or SN74ALVTHR16245VR equivalent, key selection considerations include bidirectional data flow control via DIR/OE pins, TTL-level input tolerance up to 5.5 V, low ground bounce (<0.8 V), and TVSOP-48 (DGV) package suitability for high-density PCB layouts with distributed power/ground pins.
Technical Context
This device implements a flow-through architecture with separate A- and B-bus ports, two independent direction-control (1DIR, 2DIR) and output-enable (1OE, 2OE) inputs, and dual 8-bit sections that can operate as one 16-bit or two 8-bit transceivers. Each section supports bidirectional data transfer with propagation delays as low as 0.5 ns (tPLH/tPHL) under 3.3-V/50-pF conditions.
It integrates Advanced BiCMOS Technology (ABT) for low static power dissipation and robust ESD protection (2000-V HBM, 200-V MM, 1000-V CDM), while latch-up performance exceeds 100 mA per JESD 78 Class II. The bus-hold circuit eliminates external pullup/pulldown resistors by sustaining valid logic levels on floating inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - Enables interoperability between 2.5-V and 3.3-V logic domains without level shifters. |
| Drive Strength | ±12 mA at 3.3 V - Sustains signal integrity across loaded buses and reduces need for external buffers. |
| Output Series Resistance | 30 Ω (integrated) - Suppresses overshoot/undershoot; eliminates discrete series termination resistors. |
| Input Voltage Tolerance | 0 V to 5.5 V - Allows direct connection to 5-V TTL systems while powered from 2.5/3.3-V rails. |
| Propagation Delay | 0.5–3.9 ns (tPLH/tPHL, CL = 50 pF, VCC = 3.3 V) - Supports high-speed data transfer in memory expansion or processor interconnects. |
| Bus-Hold Current | ±75 µA (IBHH/IBHL, VCC = 3 V) - Actively holds unused inputs at valid logic states without external components. |
| Ioff Leakage | ±100 µA (VCC = 0 V) - Prevents backflow current during hot insertion or partial power-down. |
Pinout & Package
SN74ALVTHR16245VR is housed in a 48-pin TVSOP (DGV) package with 0.4-mm pitch, 6.1-mm width, and 1.2-mm max height - optimized for space-constrained applications requiring thermal efficiency (θJA = 58°C/W) and high-speed layout via distributed VCC/GND pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Determines data flow direction: L = B→A, H = A→B; enables independent bidirectional control of each octal section. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Active-low; places associated A/B port outputs in high-impedance state when high - isolates buses during idle or conflict avoidance. |
| A1–A8, B1–B8 (x2) | Data I/O terminals (16 total) | Bidirectional ports with bus-hold and 30-Ω series resistance; tolerate 5-V inputs while operating at 2.5/3.3 V. |
| VCC (Pins 7, 18, 29, 40) | Power supply | Distributed supply pins minimize switching noise and improve power integrity across high-speed operation. |
| GND (Pins 4, 11, 22, 33, 44) | Ground reference | Five GND pins reduce ground bounce and enhance signal return path stability for all 16 I/Os. |
Key Features
| Feature | Design Value |
|---|---|
| Hot-insertion support | Ioff and power-up 3-state ensure zero-current backflow and automatic high-Z during power ramping - critical for live-swap backplanes. |
| Integrated bus-hold | Eliminates need for external pullup/pulldown resistors on all 16 data lines - reduces BOM count and PCB area in modular systems. |
| Flow-through pinout | A/B port pins aligned top-to-bottom (e.g., A1–A8 left side, B1–B8 right side) - simplifies layer routing and minimizes trace crossovers. |
| Mixed-mode voltage tolerance | 5-V-tolerant inputs/outputs with 2.3–3.6-V VCC - enables seamless interfacing between legacy 5-V peripherals and modern low-voltage processors. |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V - maintains noise margin in dense, high-switching digital systems. |
Applications
| Processor-to-Peripheral Interconnect | Memory Expansion Interface |
|---|---|
|
Use Scenario: Connecting an ARM Cortex-A8 processor (3.3-V I/O) to legacy 5-V UART, SPI, or GPIO peripherals in industrial HMIs. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing data flow direction and isolation via DIR/OE signals. Use Value: Eliminates discrete level shifters and pull resistors while maintaining timing integrity (tPLH ≤ 3.9 ns) across mixed-voltage domains. |
Use Scenario: Extending address/data bus width between a microcontroller and parallel NOR flash or SRAM in embedded storage modules. IC Role / Device Role / Timing Role: 16-bit data path buffer with 3-state control enabling shared bus arbitration between multiple memory devices. Use Value: Integrated 30-Ω series resistors suppress reflections on long traces; bus-hold prevents floating states during chip-select transitions. |
| Modular Backplane Data Routing | Hot-Swappable I/O Carrier Board |
|
Use Scenario: Data aggregation across plug-in mezzanine cards in telecom line cards where modules may be inserted/removed under power. IC Role / Device Role / Timing Role: Isolation and direction-controlled transceiver on backplane-side interface, leveraging Ioff and power-up 3-state. Use Value: Prevents bus contention and backdrive damage during hot insertion; distributed VCC/GND pins suppress simultaneous switching noise across 48-pin footprint. |
Use Scenario: Signal conditioning and isolation for field I/O channels (digital input/output) on a carrier board supporting interchangeable sensor/actuator modules. IC Role / Device Role / Timing Role: Bus interface element providing configurable direction, output disable, and floating-input immunity via bus-hold. Use Value: Reduces component count by replacing 16 discrete Schmitt-trigger buffers + pull resistors; supports fail-safe open-wire detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH16245VR | No bus-hold circuitry; lower drive (±8 mA); no Ioff support. | Not suitable for hot-swap or floating-input environments; requires external pull resistors. | Select only if cost sensitivity outweighs reliability requirements and system guarantees controlled input states. |
| SN74LVC16245ADGGR | 3.3-V only (no 2.5-V support); no 5-V input tolerance; higher ICC (5 mA typical). | Limited to single-supply 3.3-V systems; incompatible with 5-V peripherals or 2.5-V SoCs. | Choose when interfacing exclusively within 3.3-V domains and thermal budget permits higher static power. |
Compared with SN74ALVCHR16245VR and SN74LVC16245ADGGR, the SN74ALVTHR16245VR uniquely combines 2.5/3.3-V dual-rail operation, 5-V input tolerance, bus-hold, and Ioff - making it the only option qualified for mixed-voltage hot-plug systems without external support components.
Availability
SN74ALVTHR16245VR is available at Aetrix Electronics and suitable for processor interconnects, memory expansion interfaces, modular backplane routing, and hot-swappable I/O carrier boards requiring stable component supply across extended product lifecycles.
Supply support for SN74ALVTHR16245VR 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 SN74ALVTHR16245VR belongs to TI's ALVTHR advanced bus transceiver family, engineered specifically for robust mixed-voltage communication in industrial, telecom, and computing infrastructure where hot insertion, signal integrity, and component consolidation are critical.
FAQ
What voltage levels does the SN74ALVTHR16245VR support on its I/O pins?
The SN74ALVTHR16245VR accepts input voltages from 0 V to 5.5 V regardless of VCC setting (2.3–3.6 V), enabling direct interfacing with 5-V TTL systems. Its outputs are compatible with 2.5-V and 3.3-V logic families, and it includes integrated 30-Ω series resistors to dampen ringing without external components. This makes SN74ALVTHR16245VR ideal for bridging legacy and modern voltage domains.
Does the SN74ALVTHR16245VR require external pullup or pulldown resistors on data lines?
No - the SN74ALVTHR16245VR incorporates active bus-hold circuitry on all 16 data inputs (A1–A8, B1–B8), which sustains valid logic states on floating or unused pins. Using external pull resistors with SN74ALVTHR16245VR is not recommended, as it may interfere with bus-hold functionality and increase power consumption unnecessarily.
How does the SN74ALVTHR16245VR support hot insertion in backplane applications?
The SN74ALVTHR16245VR supports hot insertion via two key features: Ioff circuitry disables outputs when VCC = 0 V (leakage ≤ ±100 µA), preventing damaging back-current, and power-up 3-state forces outputs into high-impedance during power ramping (VCC ≤ 1.2 V). These features ensure safe live module replacement in systems using SN74ALVTHR16245VR as a backplane interface element.
What is the maximum data rate supported by the SN74ALVTHR16245VR?
The SN74ALVTHR16245VR achieves propagation delays as low as 0.5 ns (tPLH/tPHL) under 3.3-V/50-pF conditions, supporting data rates exceeding 200 Mbps in point-to-point configurations. Real-world throughput depends on load capacitance, trace length, and termination - but the device's 30-Ω integrated series resistance and flow-through pinout facilitate clean signal edges essential for high-speed bus operation.
Can the SN74ALVTHR16245VR be used as both a 16-bit and dual 8-bit transceiver?
Yes - the SN74ALVTHR16245VR contains two independent 8-bit sections (1DIR/1OE/A1–A8/B1–B8 and 2DIR/2OE/A1–A8/B1–B8), allowing flexible configuration: either as a single 16-bit transceiver (using common DIR/OE) or as two separate 8-bit units (with independent DIR/OE control). This dual-mode capability simplifies design reuse across varying bus-width requirements in the same platform.
SN74ALVTHR16245VR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTHR
- Package/Case:
- 48-TFSOP (0.173", 4.40mm Width)
- 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:
- 12mA, 12mA
- Voltage - Supply:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TVSOP
SN74ALVTHR16245VR FAQ
1.How can I place an order for SN74ALVTHR16245VR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTHR16245VR 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 SN74ALVTHR16245VR reliable?
The price and inventory of SN74ALVTHR16245VR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTHR16245VR is usually 5 days.
3.What payment methods are accepted for SN74ALVTHR16245VR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVTHR16245VR transactions.
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4.How is shipping managed for SN74ALVTHR16245VR?
SN74ALVTHR16245VR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTHR16245VR 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 SN74ALVTHR16245VR?
For technical support, including SN74ALVTHR16245VR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTHR16245VR requirements.
6.How does Aetrix verify that SN74ALVTHR16245VR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTHR16245VR 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 SN74ALVTHR16245VR meets industry standards.
7.What is the process for return or replacement of SN74ALVTHR16245VR?
All SN74ALVTHR16245VR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTHR16245VR, 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 SN74ALVTHR16245VR part is unused and in its original packaging.
Return procedure for SN74ALVTHR16245VR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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