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Texas Instruments SN74LVC16T245DGVR
- Part No.:
- SN74LVC16T245DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC16T245DGVR.pdf
- Description:
- IC TRANSLATOR BIDIR 48TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74LVC16T245 from Texas Instruments is a 16-bit dual-supply noninverting bus transceiver with configurable level-shifting, supporting bidirectional voltage translation between 1.65 V–5.5 V domains on both A and B ports. It features independent VCCA and VCCB rails, Ioff partial-power-down protection, VCC isolation, and tri-state outputs controlled by DIR/OE pins. Used in mixed-voltage system interconnects such as 1.8-V microcontrollers interfacing 3.3-V peripherals.
For engineers reviewing the SN74LVC16T245 datasheet, SN74LVC16T245 pinout, SN74LVC16T245 application, or SN74LVC16T245 equivalent, key selection criteria include dual-rail supply flexibility (1.65–5.5 V per rail), guaranteed high-impedance during power sequencing, Ioff compliance for hot-insertion, and verified 200 MHz data rate capability in 3.3-V-to-5-V translation.
Technical Context
The SN74LVC16T245 implements two independent 8-bit transceiver channels (1A↔1B and 2A↔2B), each with dedicated DIR and OE controls referenced to VCCA. Direction control is asynchronous: DIR = HIGH enables A→B transmission; DIR = LOW enables B→A. OE = HIGH forces both ports into high-impedance regardless of DIR state.
Its dual-rail architecture isolates logic thresholds: A-port I/Os track VCCA (VIH/VIL referenced to VCCA); B-port I/Os track VCCB. The VCC isolation feature guarantees high-impedance on both ports if either VCCA or VCCB is at GND, preventing bus contention during power-up/down sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 1.65 V to 5.5 V - Enables interface with 1.8-V, 2.5-V, 3.3-V, or 5-V controllers without external level shifters. |
| VCCB Range | 1.65 V to 5.5 V - Supports bidirectional translation to any standard low-voltage node on the B bus. |
| Max Data Rate | 200 MHz - Validated for 3.3-V-to-5-V conversion; ensures compatibility with high-speed parallel interfaces like memory buses or FPGA I/O. |
| Ioff Current | ±1 μA max - Prevents damaging backflow current when one supply is powered down, enabling safe hot-swap operation. |
| VCC Isolation | Active - Forces both A and B ports to high-impedance if either VCCA or VCCB = GND, eliminating false logic during power sequencing. |
| ESD Rating | ±2000 V HBM - Meets industrial-grade ESD robustness requirements for board-level handling and system integration. |
| Propagation Delay | 0.3 ns to 23.8 ns - Varies with supply voltages and load; tPLH/tPHL as low as 0.3 ns at 5-V/5-V enables timing-critical applications. |
Pinout & Package
TSSOP-48 package (DGV) with 12.50 mm × 6.10 mm body size, lead pitch 0.4 mm, and exposed pad not present. Pin numbering follows JEDEC MO-153 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction-control input | Asynchronous control referenced to VCCA; HIGH = A→B, LOW = B→A per channel pair. |
| 1OE, 2OE | Output-enable input | Referenced to VCCA; HIGH disables all outputs (A/B) into high-impedance, overriding DIR state. |
| 1A1–1A8, 2A1–2A8 | A-port I/O | Bidirectional data lines referenced to VCCA; tolerate overvoltage up to VCCA + 0.5 V. |
| 1B1–1B8, 2B1–2B8 | B-port I/O | Bidirectional data lines referenced to VCCB; tolerate overvoltage up to VCCB + 0.5 V. |
| VCCA | A-port supply | Power rail for A-side logic and control inputs (DIR/OE); sets VIH/VIL thresholds for A port and controls. |
| VCCB | B-port supply | Power rail for B-side logic; defines voltage domain and logic thresholds for B-port I/Os. |
| GND | Ground reference | Common return path for both supply domains; must be low-impedance and shared across VCCA/VCCB decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail level shifting | Independent 1.65–5.5 V operation on VCCA and VCCB enables direct 1.8-V ↔ 3.3-V, 2.5-V ↔ 5-V, or any mixed-voltage interconnect without external components. |
| VCC isolation | Automatic high-impedance on both ports if either VCCA or VCCB is at GND - eliminates bus contention during asymmetric power sequencing in embedded systems. |
| Ioff partial-power-down | Guaranteed ≤±1 μA off-state current prevents backflow when one supply is inactive, supporting hot-plug and battery-backed subsystems. |
| Overvoltage-tolerant I/O | A- and B-port pins withstand up to VCCX + 0.5 V, allowing safe interfacing with higher-voltage drivers without clamping diodes or resistors. |
| Configurable tri-state control | Per-channel DIR + global OE allows flexible bus arbitration: individual channel enable/disable or full isolation via OE high. |
Applications
| Industrial PLC Backplane Interface | Automotive Infotainment SoC Interconnect |
|---|---|
Use Scenario: Connecting a 3.3-V ARM-based controller to legacy 5-V sensor modules and actuator drivers on a modular PLC backplane. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing data flow between mismatched voltage domains while maintaining signal integrity and timing alignment across 16 parallel lines. Use Value: Eliminates need for discrete level-shifter arrays; supports 200 MHz burst transfers during real-time I/O scanning; VCC isolation prevents latch-up during module hot-swap. | Use Scenario: Interfacing a 1.8-V automotive-grade SoC to 3.3-V display driver ICs and audio codecs in a head-unit design. IC Role / Device Role / Timing Role: Dual-rail transceiver enabling synchronous pixel data and control signals across voltage boundaries with sub-1 ns skew control. Use Value: Reduces BOM count vs. single-channel solutions; Ioff protects SoC I/O during display power cycling; meets AEC-Q100 temperature range (-40°C to +105°C) when operated within spec. |
| Enterprise SSD Controller Memory Bus | Telecom Baseband FPGA Interface |
Use Scenario: Bridging a 2.5-V NVMe controller ASIC to 1.8-V NAND flash packages in a high-density SSD module. IC Role / Device Role / Timing Role: High-speed bidirectional data translator ensuring setup/hold timing margins are preserved across voltage domains during DDR-like bursts. Use Value: Achieves <10 ns propagation delay variation across all 16 lanes; CpdA/CpdB <22 pF minimizes dynamic power in high-frequency switching; TSSOP-48 footprint fits tight PCB layouts. | Use Scenario: Linking a 3.3-V FPGA I/O bank to 1.8-V RF transceiver ICs in a 5G small-cell baseband board. IC Role / Device Role / Timing Role: Level-shifting transceiver providing direction-controlled data paths for JESD204B lane management and calibration signals. Use Value: OE-controlled tri-state allows FPGA to isolate transceiver during reconfiguration; VCC isolation prevents corruption when RF section powers down independently. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245 | Lower VCC min (1.2 V), higher speed (tPLH down to 0.2 ns), but no VCC isolation or Ioff spec. | Preferred for ultra-low-voltage (<1.65 V) or sub-ns timing-critical designs where isolation is not required. | Select SN74AVCH16T245 only if operating below 1.65 V or requiring <0.3 ns propagation; otherwise SN74LVC16T245 provides broader safety features. |
| TXB0108PWR | 8-bit, auto-direction sensing, no DIR/OE pins; lower drive strength (±8 mA), no VCC isolation. | Suitable for simple point-to-point I²C/SPI links where direction is predictable and isolation unnecessary. | Use TXB0108PWR for space-constrained 8-bit auto-sensing apps; SN74LVC16T245 remains optimal for 16-bit, manually controlled, safety-critical mixed-voltage buses. |
Compared with SN74AVCH16T245 and TXB0108PWR, the SN74LVC16T245 uniquely combines 16-bit width, explicit DIR/OE control, VCC isolation, and Ioff-making it the only option for robust, manually managed, high-channel-count mixed-voltage interconnects in industrial and telecom infrastructure.
Availability
SN74LVC16T245 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive infotainment SoC interconnects, and enterprise SSD controller memory buses requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74LVC16T245 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in precision analog and low-power logic solutions.
The SN74LVC16T245 belongs to TI's LVC logic family, designed specifically for robust, low-voltage bidirectional level translation in mixed-supply systems where power sequencing reliability and ESD resilience are critical.
FAQ
What voltage ranges does the SN74LVC16T245 support on its A and B ports?
The SN74LVC16T245 supports 1.65 V to 5.5 V independently on both VCCA (A port) and VCCB (B port). This allows translation between any combination of standard low-voltage nodes-including 1.8-V, 2.5-V, 3.3-V, and 5-V-without external components. Each port's logic thresholds (VIH/VIL) are referenced to its respective supply rail, ensuring reliable operation across the full range.
How does the VCC isolation feature work in the SN74LVC16T245?
The VCC isolation feature in the SN74LVC16T245 forces both A and B ports into high-impedance whenever either VCCA or VCCB is at GND. This prevents false logic states or bus contention during power-up, power-down, or fault conditions where supplies ramp asymmetrically. It is implemented internally and requires no external circuitry-ensuring fail-safe behavior in industrial and automotive systems.
Can the SN74LVC16T245 operate with different supply voltages on VCCA and VCCB simultaneously?
Yes-the SN74LVC16T245 is explicitly designed for simultaneous dual-supply operation. For example, it can translate data from a 1.8-V microcontroller (VCCA = 1.8 V) to a 3.3-V peripheral (VCCB = 3.3 V) in either direction. The device maintains valid logic levels, timing, and drive strength across all supported voltage combinations, as verified in TI's switching characteristics tables.
What is the purpose of the Ioff specification for the SN74LVC16T245?
The Ioff specification (≤±1 μA) ensures that when the SN74LVC16T245 is partially powered down-e.g., VCCA = 0 V while VCCB remains active-no damaging backflow current flows through the I/O pins. This protects upstream and downstream devices during hot-swap, battery backup, or power-gating scenarios, making the SN74LVC16T245 suitable for systems requiring graceful partial-power-down operation.
Does the SN74LVC16T245 require external pull-up resistors on DIR or OE pins?
No external pull-ups are required for functional operation, but TI recommends tying OE to VCCA via a pullup resistor (value determined by driver sink capability) to guarantee high-impedance state during power-up/power-down. DIR may be driven directly from a controller GPIO. The SN74LVC16T245 itself has no internal pull-ups on DIR or OE; relying on external bias ensures deterministic behavior before firmware initialization.
SN74LVC16T245DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 48-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.65V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TVSOP
SN74LVC16T245DGVR FAQ
1.How can I place an order for SN74LVC16T245DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC16T245DGVR 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 SN74LVC16T245DGVR reliable?
The price and inventory of SN74LVC16T245DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC16T245DGVR is usually 5 days.
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Once your SN74LVC16T245DGVR 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 SN74LVC16T245DGVR?
For technical support, including SN74LVC16T245DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC16T245DGVR requirements.
6.How does Aetrix verify that SN74LVC16T245DGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVC16T245DGVR 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 SN74LVC16T245DGVR meets industry standards.
7.What is the process for return or replacement of SN74LVC16T245DGVR?
All SN74LVC16T245DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC16T245DGVR, 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 SN74LVC16T245DGVR part is unused and in its original packaging.
Return procedure for SN74LVC16T245DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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