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Texas Instruments SN74LVT245BGQNR
- Part No.:
- SN74LVT245BGQNR
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFBGA
- Datasheet:
-
SN74LVT245BGQNR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,681
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Product details
Overview
SN74LVT245BGQNR from Texas Instruments is an octal bus transceiver designed for 3.3-V VCC operation with mixed-mode 5-V input/output tolerance, supporting bidirectional data flow between A and B buses under DIR control and high-impedance isolation via OE, with Ioff and power-up 3-state for hot insertion in battery-powered systems down to 2.7 V.
For engineers reviewing the SN74LVT245BGQNR datasheet, SN74LVT245BGQNR pinout, SN74LVT245BGQNR application, or SN74LVT245BGQNR equivalent, this page delivers verified electrical specs (VCC = 2.7–3.6 V, tPLH/tPHL ≤ 3.5 ns @ 3.3 V), thermal resistance (θJA = 78°C/W), latch-up immunity (>100 mA), and ESD ratings (2000-V HBM) critical for industrial bus interface design.
Technical Context
The SN74LVT245BGQNR implements TTL-compatible level translation between 3.3-V logic domains and legacy 5-V buses using active pull-up/pull-down output stages, with direction control (DIR) determining A→B or B→A data flow and output-enable (OE) asserting high-impedance state on both ports. Its Ioff circuitry blocks current backflow during power-down, while power-up 3-state prevents bus contention at VCC ramp rates up to 200 µs/V.
It operates across −40°C to 85°C with supply voltage as low as 2.7 V, supports unregulated battery inputs, and features low ground bounce (VOLP < 0.8 V @ 3.3 V), making it suitable for portable and mixed-voltage embedded systems requiring robust hot-swap capability and noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Enables stable operation from single-cell Li-ion or regulated 3.3-V rails without external LDO. |
| I/O Voltage Tolerance | Up to 5.5 V on A/B ports - Allows direct connection to 5-V TTL buses without external level shifters. |
| tPLH/tPHL | ≤ 3.5 ns @ VCC = 3.3 V, CL = 50 pF - Supports >100-MHz bus toggle rates in high-speed digital interfaces. |
| Ioff | ±100 µA @ VCC = 0 - Prevents damaging back-current during hot insertion or partial power-down. |
| Latch-Up Immunity | >100 mA per JESD 78 Class II - Ensures reliability in noisy industrial environments with transient coupling. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets stringent handling and system-level ESD requirements. |
| θJA | 78°C/W for GQN package - Defines thermal derating limits for continuous 64-mA per-output drive in compact layouts. |
Pinout & Package
VFBGA-20 (GQN) package: 2.5 mm × 3.0 mm, 0.5-mm ball pitch, bottom-side solder balls, JEDEC MO-225 variation BC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Input/Output port A | 8-bit bidirectional data lane; accepts 5-V inputs while powered from 3.3-V VCC. |
| B1–B8 | Input/Output port B | 8-bit bidirectional data lane; drives 5-V logic levels with 3.3-V supply. |
| DIR | Direction control | Low = B→A transfer; High = A→B transfer; TTL-compatible threshold (VIL ≤ 0.8 V, VIH ≥ 2 V). |
| OE | Output enable | Active-low; asserts high-impedance on both A and B ports when high; requires pull-up for safe power-up. |
| VCC | Supply voltage | 3.3-V core supply; supports down to 2.7 V for battery brownout tolerance. |
| GND | Ground reference | Single ground plane required; decoupling capacitor placement critical for ground bounce suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant I/O with 3.3-V VCC enables seamless interconnection between legacy and modern logic families. |
| Hot-insertion support | Ioff and power-up 3-state eliminate bus conflicts during live board replacement in modular systems. |
| Low ground bounce | VOLP < 0.8 V @ 3.3 V ensures signal integrity during simultaneous switching of all 8 outputs. |
| Wide VCC range | 2.7–3.6 V operation accommodates aging batteries and unregulated DC-DC outputs without reset or dropout. |
| High ESD/latch-up robustness | JESD 22-compliant ESD and JESD 78 Class II latch-up exceed industrial reliability standards. |
Applications
| Industrial PLC Backplane Interface | Portable Test Equipment Data Bus |
|---|---|
|
Use Scenario: Interfacing a 3.3-V FPGA-based controller to legacy 5-V I/O modules in a programmable logic controller rack. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing A↔B data flow under DIR control with OE-gated isolation during configuration. Use Value: Eliminates need for discrete level-shifter arrays while maintaining sub-4-ns propagation delay for deterministic scan-cycle timing. |
Use Scenario: Connecting a 3.3-V ARM microcontroller to 5-V DMM front-end circuitry in handheld calibration gear. IC Role / Device Role / Timing Role: Hot-pluggable bus isolator enabling field-replaceable sensor modules without powering down the main unit. Use Value: Ioff and power-up 3-state prevent damage during module swap; 2.7-V minimum VCC extends runtime on single-cell Li-ion. |
| Automotive Body Control Module | Medical Imaging Data Link |
|
Use Scenario: Bridging a 3.3-V CAN microcontroller to 5-V analog sensor bus in a vehicle body control unit. IC Role / Device Role / Timing Role: Mixed-voltage bus buffer providing ESD-hardened, latch-up-immune signal path between domains. Use Value: 2000-V HBM rating meets automotive component-level ESD requirements; 100-mA latch-up immunity withstands load-dump transients. |
Use Scenario: Isolating high-speed image data lines between a 3.3-V FPGA image processor and 5-V CCD driver board in ultrasound equipment. IC Role / Device Role / Timing Role: Low-jitter, low-ground-bounce transceiver ensuring pixel-clock integrity across voltage domains. Use Value: VOLP < 0.8 V minimizes timing skew across parallel data lanes; 9-pF Cio reduces signal distortion at 100-MHz burst rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH245PWRE | LVTH family: higher drive strength (IOL = 12 mA typical), but no 5-V I/O tolerance - requires external clamping for 5-V bus interfacing. | Best suited for 3.3-V-only systems needing faster edge rates; unsuitable where 5-V inputs are present. | Select only if interfacing exclusively with 3.3-V peripherals and higher sink current is required. |
| 74ALVC16245DGGR | 16-bit dual-octet device in TSSOP-48; supports 1.65–3.6 V VCC, 5-V tolerant I/O, but larger footprint and higher capacitance (Ci = 5 pF vs. 4 pF). | Used in wide-data-path applications like memory expansion; not pin-compatible due to 48-pin count and different pinout. | Choose when 16-bit width is needed and PCB area allows TSSOP-48; verify layout compatibility before substitution. |
Compared with SN74LVT245BGQNR, SN74LVTH245PWRE lacks 5-V I/O tolerance and requires redesign for mixed-voltage use, while 74ALVC16245DGGR offers double width but demands full PCB rework - neither is drop-in; SN74LVT245BGQNR remains optimal for space-constrained 8-bit mixed-voltage isolation.
Availability
SN74LVT245BGQNR is available at Aetrix Electronics and suitable for industrial automation, portable instrumentation, and automotive body electronics requiring stable component supply, long-term lifecycle support, and guaranteed traceability for ISO 13485 and IATF 16949 programs.
Supply support for SN74LVT245BGQNR 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 headquartered in Dallas, Texas, delivering analog, embedded processing, and logic solutions since 1930 with emphasis on reliability, longevity, and industrial-grade specifications.
The SN74LVT245BGQNR belongs to TI's LVT logic family, engineered specifically for mixed-voltage bus interfacing in harsh environments where hot-swap capability, ESD resilience, and wide VCC range are mandatory.
FAQ
What is the maximum operating temperature for SN74LVT245BGQNR?
The SN74LVT245BGQNR is rated for operation from −40°C to +85°C ambient temperature, fully specified across this range for all recommended electrical conditions including VCC = 2.7–3.6 V, IOL = 64 mA, and tPLH/tPHL ≤ 4 ns. Thermal performance is validated with θJA = 78°C/W for the GQN package, enabling reliable use in enclosed industrial enclosures without forced airflow.
Does SN74LVT245BGQNR support true 5-V input tolerance?
Yes, SN74LVT245BGQNR supports input voltages up to 5.5 V on A and B ports regardless of VCC level, confirmed by absolute maximum rating VI = −0.5 V to 7 V and electrical test condition VI = 5.5 V. This allows direct connection to 5-V TTL buses without external clamping diodes or level translators, a key feature distinguishing it from standard LV or LVC devices.
How does SN74LVT245BGQNR handle power sequencing during hot insertion?
SN74LVT245BGQNR incorporates dedicated Ioff circuitry that disables outputs and blocks reverse current when VCC = 0, plus power-up 3-state logic that holds outputs in high-impedance until VCC reaches valid operating range. These features ensure zero bus contention during live insertion into a powered-backplane system - a requirement explicitly validated per JESD78 and documented in the SCES004H datasheet.
What is the recommended pull-up resistor value for OE on SN74LVT245BGQNR?
The datasheet specifies that OE should be tied to VCC through a pull-up resistor, with minimum value determined by the current-sinking capability of the driving source. For typical 3.3-V operation with standard CMOS drivers, a 4.7-kΩ resistor is commonly used; however, exact value depends on driver strength and noise margin requirements - TI recommends verifying against the specific controller's IOH and system noise floor rather than applying a fixed value.
Is SN74LVT245BGQNR pin-compatible with other packages in the SN74LVT245B family?
No, SN74LVT245BGQNR uses a 20-ball VFBGA (GQN) package with JEDEC MO-225 variation BC footprint, while SOIC (DW), SSOP (DB), TSSOP (PW), and QFN (RGY) variants have distinct pinouts and land patterns. The GQN pin mapping (A1–A8, B1–B8, DIR, OE, VCC, GND) is unique to the ball-grid array configuration and not interchangeable with leaded packages without PCB redesign.
SN74LVT245BGQNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVT
- Package/Case:
- 20-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- 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:
- 20-BGA MICROSTAR JUNIOR (4x3)
SN74LVT245BGQNR FAQ
1.How can I place an order for SN74LVT245BGQNR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT245BGQNR 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 SN74LVT245BGQNR reliable?
The price and inventory of SN74LVT245BGQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT245BGQNR is usually 5 days.
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4.How is shipping managed for SN74LVT245BGQNR?
SN74LVT245BGQNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT245BGQNR 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 SN74LVT245BGQNR?
For technical support, including SN74LVT245BGQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT245BGQNR requirements.
6.How does Aetrix verify that SN74LVT245BGQNR is sourced from the original manufacturer or authorized distributors?
All SN74LVT245BGQNR 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 SN74LVT245BGQNR meets industry standards.
7.What is the process for return or replacement of SN74LVT245BGQNR?
All SN74LVT245BGQNR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT245BGQNR, 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 SN74LVT245BGQNR part is unused and in its original packaging.
Return procedure for SN74LVT245BGQNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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