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Texas Instruments SN74ALVTH16245GR
- Part No.:
- SN74ALVTH16245GR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ALVTH16245GR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,241
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Product details
Overview
SN74ALVTH16245GR from Texas Instruments is a 16-bit noninverting 3-state transceiver IC designed for mixed-voltage bus interfacing between 2.5-V/3.3-V logic and 5-V systems. It supports bidirectional data flow (A↔B), features Ioff and power-up 3-state for hot insertion, delivers ±32/64 mA drive at 3.3 V, and integrates bus-hold circuitry to eliminate external pullup/pulldown resistors. It is used in backplane interface modules requiring level translation and bus isolation.
For engineers reviewing the SN74ALVTH16245GR datasheet, SN74ALVTH16245GR pinout, SN74ALVTH16245GR application, or SN74ALVTH16245GR equivalent, key selection criteria include its dual-octal transceiver architecture, 3.3-V operation with 5-V tolerant I/O, guaranteed hot-insertion support via Ioff and power-up 3-state, bus-hold functionality, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
This device implements two independent 8-bit transceiver sections, each controlled by dedicated DIR (direction) and OE (output enable) inputs. Its ABT BiCMOS process enables low static power dissipation while maintaining TTL-compatible input thresholds and 5-V-tolerant I/O pins across 2.3–3.6-V VCC.
The integrated bus-hold circuit actively maintains valid logic levels on floating data inputs without external components, and distributed VCC/GND pins reduce simultaneous switching noise. Latch-up immunity exceeds 100 mA per JESD 78 Class II, and output ground bounce (VOLP) remains below 0.8 V at 3.3 V and 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - Supports stable operation across 2.5-V and 3.3-V supply rails with margin for variation. |
| I/O Voltage Tolerance | 0 V to 5.5 V - Enables direct connection to 5-V buses without level-shifting components. |
| Output Drive | −32 mA / +64 mA at 3.3 V - Sufficient to drive heavy capacitive loads and multiple TTL inputs in backplane or motherboard applications. |
| Propagation Delay | 0.5 ns to 3.1 ns (CL = 50 pF, VCC = 3.3 V) - Ensures sub-nanosecond timing margins for high-speed synchronous bus transfers. |
| Bus-Hold Current | ±75 µA at VIH min/VIL max (VCC = 3 V) - Maintains defined logic state on unused inputs without external biasing. |
| Power-Up 3-State | Active when VCC ≤ 1.2 V - Prevents output contention during power sequencing in hot-plug systems. |
| Ioff Protection | ±100 µA at VCC = 0 V - Blocks damaging current flow when the device is unpowered but connected to live buses. |
Pinout & Package
TSSOP-48 (DGG) package with 0.5-mm pitch, 12.5-mm × 6.1-mm body, and exposed thermal pad (not electrically connected). Designed for fine-pitch surface-mount assembly and optimized for signal integrity in high-speed digital systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Determines data flow direction: DIR = L → B-to-A; DIR = H → A-to-B. |
| 1OE, 2OE | Output enable input (per 8-bit section) | OE = L → outputs active; OE = H → outputs in high-impedance isolation state. |
| 1A1–1A8, 2A1–2A8 | Port A data inputs/outputs | First and second 8-bit bus side; bidirectional under DIR/OE control. |
| 1B1–1B8, 2B1–2B8 | Port B data inputs/outputs | Second bus side; complements Port A in full 16-bit transceiver operation. |
| VCC (Pins 7, 18, 29, 40) | Supply voltage | Distributed power pins minimize IR drop and switching noise across the die. |
| GND (Pins 4, 11, 22, 33, 44) | Ground reference | Multiple ground connections reduce ground bounce and improve EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 2.3–3.6-V VCC with 5-V-tolerant I/O enables seamless interconnection between 3.3-V controllers and legacy 5-V peripherals. |
| Hot-insertion support | Ioff and power-up 3-state ensure safe insertion/removal in powered-backplane systems without disrupting adjacent devices. |
| Integrated bus-hold | Eliminates need for 16 external pullup/pulldown resistors-reducing BOM count, board area, and layout complexity. |
| Flow-through pinout | A/B port signals enter and exit opposite sides of the package, simplifying layer routing and minimizing trace crossovers. |
| Low ground bounce | VOLP < 0.8 V at 3.3 V ensures reliable low-level signaling even under heavy switching conditions. |
Applications
| Backplane Data Interface | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Bidirectional data transfer between a 3.3-V FPGA-based controller and legacy 5-V peripheral cards in a modular rack system. IC Role / Device Role / Timing Role: Level-translating transceiver managing A↔B bus arbitration with precise direction and enable control. Use Value: Enables interoperability without discrete level shifters; bus-hold prevents floating states during card hot-swap transitions. |
Use Scenario: Isolating and buffering digital I/O signals between a 2.5-V microcontroller and 5-V field sensors/actuators in an industrial control cabinet. IC Role / Device Role / Timing Role: 16-bit isolated bus driver providing robust drive strength and noise immunity in electrically noisy environments. Use Value: ±64 mA sink capability drives long traces and multiple inputs; distributed VCC/GND pins suppress switching noise in shared power domains. |
| Memory Expansion Subsystem | Test Equipment Signal Routing |
|
Use Scenario: Extending address/data bus width between a 3.3-V SoC and external SRAM or Flash memory operating at 5-V logic levels. IC Role / Device Role / Timing Role: Noninverting transceiver with sub-3.1 ns propagation delay preserving setup/hold timing for parallel memory access. Use Value: Low skew (<150 ps typical) ensures simultaneous valid data capture across all 16 bits, critical for burst-mode memory reads. |
Use Scenario: Reconfigurable signal path switching in automated test equipment where DUT interfaces must adapt to varying logic families (TTL, CMOS, LVTTL). IC Role / Device Role / Timing Role: Programmable bus isolator enabling dynamic reassignment of 16 signal lines between instrument channels and DUT ports. Use Value: Ioff protection prevents backfeed damage when instrument channels are powered down mid-test; OE-controlled isolation enables safe channel reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Lower drive (±24 mA), no bus-hold, 1.65–3.6-V VCC only, no 5-V tolerance. | Suitable only for pure 3.3-V or lower systems; requires external pullups if inputs float. | Select when cost sensitivity outweighs mixed-voltage needs and bus-hold is unnecessary. |
| SN74AVC16245DGGR | Higher speed (tPD < 2.5 ns), 1.2–3.6-V VCC, 5-V tolerant, no Ioff or power-up 3-state. | Lacks hot-insertion support; unsuitable for live-backplane replacement scenarios. | Prefer for high-frequency applications where power sequencing is controlled and bus isolation during power ramp is not required. |
Compared with SN74LVC16245ADGGR and SN74AVC16245DGGR, the SN74ALVTH16245GR uniquely combines 5-V I/O tolerance, Ioff, power-up 3-state, and integrated bus-hold-making it the only choice for robust hot-plug-capable mixed-voltage bus bridging in industrial and telecom infrastructure.
Availability
SN74ALVTH16245GR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom backplane interfaces, memory expansion subsystems, and automated test equipment requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALVTH16245GR 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 for industrial and communications markets.
The SN74ALVTH16245GR belongs to TI's Widebus™ family of advanced transceivers, engineered specifically for mixed-voltage bus interfacing, hot-plug resilience, and noise-immune operation in mission-critical infrastructure equipment.
FAQ
What voltage levels can the SN74ALVTH16245GR tolerate on its I/O pins?
The SN74ALVTH16245GR supports input and output voltages from 0 V to 5.5 V regardless of VCC, enabling direct interfacing with 5-V TTL buses while operating from a 2.5-V or 3.3-V supply. This 5-V tolerance is specified across the full recommended operating temperature range (−40°C to 85°C) and does not require external clamping circuitry.
Does the SN74ALVTH16245GR support hot insertion, and how is it implemented?
Yes, the SN74ALVTH16245GR supports hot insertion via two complementary mechanisms: Ioff circuitry disables outputs when VCC = 0 V to prevent back-current flow, and power-up 3-state forces outputs into high-impedance during power ramp (VCC ≤ 1.2 V). Both features are fully characterized per JESD78 Class II latch-up standards and require no external components to function.
How does the bus-hold feature of the SN74ALVTH16245GR eliminate the need for external resistors?
The SN74ALVTH16245GR integrates active bus-hold circuitry on all data inputs (A and B ports), which sources or sinks up to ±75 µA to maintain a valid logic level when inputs float. This eliminates the need for 16 discrete pullup/pulldown resistors, reducing BOM cost, PCB area, and potential signal integrity degradation from resistor parasitics.
What is the maximum output drive capability of the SN74ALVTH16245GR at 3.3-V VCC?
At VCC = 3.3 V, the SN74ALVTH16245GR delivers −32 mA (high-level source) and +64 mA (low-level sink) per output, as specified under recommended operating conditions. This drive strength allows reliable interfacing with multiple TTL loads or long PCB traces without signal degradation, and is validated across the full −40°C to 85°C temperature range.
Is the SN74ALVTH16245GR pin-compatible with other 16-bit transceivers in TI's portfolio?
No, the SN74ALVTH16245GR is not pin-compatible with standard 16-bit transceivers such as the SN74LVC16245A or SN74AVC16245 due to differences in pin assignment, especially for VCC and GND distribution. Its TSSOP-48 (DGG) footprint uses 4 dedicated VCC and 5 GND pins arranged to minimize noise-requiring unique PCB layout and preventing drop-in replacement without redesign.
SN74ALVTH16245GR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm 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:
- 32mA, 64mA
- 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-TSSOP
SN74ALVTH16245GR FAQ
1.How can I place an order for SN74ALVTH16245GR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16245GR 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 SN74ALVTH16245GR reliable?
The price and inventory of SN74ALVTH16245GR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16245GR is usually 5 days.
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4.How is shipping managed for SN74ALVTH16245GR?
SN74ALVTH16245GR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH16245GR 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 SN74ALVTH16245GR?
For technical support, including SN74ALVTH16245GR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16245GR requirements.
6.How does Aetrix verify that SN74ALVTH16245GR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16245GR 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 SN74ALVTH16245GR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16245GR?
All SN74ALVTH16245GR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16245GR, 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 SN74ALVTH16245GR part is unused and in its original packaging.
Return procedure for SN74ALVTH16245GR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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