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Texas Instruments SN74LVCC3245APWT
- Part No.:
- SN74LVCC3245APWT
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC3245APWT.pdf
- Description:
- IC TRANSLATOR BIDIR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:900
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Product details
Overview
SN74LVCC3245APWT from Texas Instruments is an octal noninverting bus transceiver with dual-supply voltage translation (2.3V–3.6V on A port, 3V–5.5V on B port), 3-state outputs, and VCC isolation. It enables bidirectional level shifting between 2.5V/3.3V and 5V domains in real-time data buses, supporting up to 24mA drive strength at 3V and operating across –40°C to 85°C.
For engineers reviewing the SN74LVCC3245APWT datasheet, SN74LVCC3245APWT pinout, SN74LVCC3245APWT application, or SN74LVCC3245APWT equivalent, this page delivers verified electrical specs, functional mode logic, thermal metrics for TSSOP-24, and design-critical sequencing behavior - all confirmed from TI's production-grade SCAS585R datasheet (May 2026 revision).
Technical Context
The SN74LVCC3245APWT implements asynchronous bidirectional data flow controlled by DIR (direction) and OE (output enable), both referenced to VCCA. Its Ioff circuitry ensures <±2μA power-off leakage when either VCCA or VCCB drops below 100mV, enabling robust partial-power-down operation without backflow current.
Glitch-free power supply sequencing allows VCCA and VCCB to be powered in any order; no external sequencing circuitry is required. The device supports simultaneous translation from 2.5V→5V and 5V→2.5V within a single package, with propagation delays as low as 1ns (tPHL/tPLH) under nominal 3.3V/5V conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| A-port supply range | 2.3V to 3.6V - enables direct interface with 2.5V and 3.3V logic families without level-shifting buffers |
| B-port supply range | 3V to 5.5V - supports legacy 5V microcontrollers, FPGAs, and industrial peripherals |
| Output drive strength | 24mA at 3V - sufficient to drive heavy capacitive loads (e.g., long PCB traces, multiple inputs) without signal degradation |
| Propagation delay | 1ns to 9.4ns - ensures timing compliance in high-speed parallel buses (e.g., memory expansion, SBC interconnects) |
| VCC isolation threshold | <100mV - guarantees automatic high-impedance state on both ports if either supply fails or floats, preventing bus contention |
| ESD rating | ±2000V HBM - meets industrial handling requirements without additional protection circuitry |
| Operating temperature | –40°C to +85°C - qualified for use in ultrasound scanners, inverters, and embedded computing environments |
Pinout & Package
Packaged in a 24-pin TSSOP (PW), the SN74LVCC3245APWT measures 7.8mm × 6.4mm and features exposed pad-compatible footprint for thermal management in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port power supply | Reference for all A-side I/O and control inputs (DIR, OE); must be stable before enabling |
| DIR (Pin 2) | Direction control input | High = A→B data flow; Low = B→A data flow; referenced to VCCA, not VCCB |
| A1–A8 (Pins 3–10) | A-port bidirectional I/O | 8-bit data path tied to VCCA domain; tolerant of overvoltage up to VCCA + 0.5V |
| GND (Pins 11, 12) | Ground reference | Dual ground pins reduce ground bounce in high-speed switching; must be low-inductance connected |
| NC (Pin 13) | No internal connection | Unbonded die pad - must remain unconnected per TI layout guidelines |
| OE (Pin 22) | Output enable (active-low) | Drives all A/B ports to high-Z when high; referenced to VCCA; controls bus isolation |
| B1–B8 (Pins 14–21) | B-port bidirectional I/O | 8-bit data path tied to VCCB domain; tolerant of overvoltage up to VCCB + 0.5V |
| VCCB (Pin 24) | B-port power supply | Reference for B-side I/O only; independent sequencing allowed due to glitch-free architecture |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage translation | Supports simultaneous 2.5V↔5V and 3.3V↔5V translation without external resistors or configuration registers |
| VCC disconnect with isolation | Automatically disables all I/Os into high-Z when either VCCA or VCCB falls below 100mV - prevents bus lockup during brownout |
| Ioff partial-power-down protection | Limits leakage to ±2μA when powered down - eliminates need for external isolation switches in hot-swap systems |
| Robust power sequencing | Eliminates requirement for external power-rail supervisors or sequencers - VCCA/VCCB may ramp in any order |
| High ESD immunity | ±2000V HBM rating - reduces risk of field failure in manufacturing and end-equipment handling |
Applications
| Ultrasound Scanner | String Inverter |
|---|---|
Use Scenario: Interfacing low-voltage FPGA-based beamformer (2.5V I/O) with 5V analog front-end ASICs and sensor drivers. IC Role / Device Role / Timing Role: Bidirectional level translator enabling real-time echo data transfer between processing and acquisition subsystems. Use Value: Eliminates timing skew from discrete resistor-based translators while maintaining sub-10ns propagation delay for synchronized sampling. | Use Scenario: Isolating MCU control signals (3.3V) from high-noise 5V gate-driver stages in photovoltaic DC-DC conversion modules. IC Role / Device Role / Timing Role: Direction-controlled bus isolator with VCCB-powered outputs and VCCA-referenced controls. Use Value: Prevents MCU latch-up during transient overvoltage events via Ioff and VCC isolation - no external TVS needed on control lines. |
| Central Inverter | Single Board Computer |
Use Scenario: Connecting ARM-based controller (3.3V GPIO) to legacy 5V CAN transceivers and isolated RS-485 PHYs in grid-tie inverters. IC Role / Device Role / Timing Role: Voltage-translating bus buffer with 3-state outputs for shared communication busses. Use Value: Enables drop-in replacement of obsolete 5V-only logic without redesigning PCB routing or adding level-shifter ICs. | Use Scenario: Expanding I/O on compact SBCs (e.g., Raspberry Pi CM4 carrier) to support mixed-voltage peripherals including 5V sensors and 2.5V ADCs. IC Role / Device Role / Timing Role: Octal bidirectional translator with OE-controlled bus arbitration for multi-peripheral sharing. Use Value: Reduces BOM count by consolidating eight independent level-shifting channels into one TSSOP-24 package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245RHLR | Single-supply (1.2V–3.6V), no VCCB rail; lower drive (12mA), no VCC isolation | Suitable only for 1.8V/2.5V/3.3V translation - cannot interface with 5V peripherals | Select when system operates exclusively below 3.6V and requires smaller package (VQFN-24) |
| TXB0308RGER | Auto-direction sensing (no DIR pin), 1.65V–3.6V on both sides, max 50Mbps | Not compatible with 5V B-port operation; lacks VCC disconnect and Ioff protection | Prefer for I²C/SPI where direction is data-driven and 5V interfacing is unnecessary |
Compared with SN74AVC8T245RHLR and TXB0308RGER, the SN74LVCC3245APWT uniquely supports true 5V B-port operation with hardware-controlled direction, VCC isolation, and Ioff - making it the only viable option for mixed 2.5V/3.3V ↔ 5V industrial bus bridging where supply sequencing is uncontrolled.
Availability
SN74LVCC3245APWT is available at Aetrix Electronics and suitable for ultrasound scanner interfaces, solar string inverter control busses, and single-board computer peripheral expansion requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74LVCC3245APWT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74LVCC3245APWT belongs to TI's LVCC logic family, engineered specifically for robust voltage translation in mixed-supply systems where power sequencing is unpredictable and bus integrity must be maintained during brownout or hot-swap events.
FAQ
What is the maximum allowable voltage on the B-port I/O pins of the SN74LVCC3245APWT?
The B-port I/O pins tolerate voltages up to VCCB + 0.5V, with an absolute maximum rating of 6V. When VCCB = 5.5V, the safe input voltage limit is 6V - exceeding this risks damage to internal ESD diodes. This overvoltage tolerance simplifies interface with 5V peripherals without external clamping.
Does the SN74LVCC3245APWT require matched power supply ramp rates for VCCA and VCCB?
No. The SN74LVCC3245APWT features glitch-free power supply sequencing: VCCA and VCCB may be powered on or off in any order, at any rate, without causing output glitches or bus contention. This eliminates the need for external supervisors or sequencers in systems with disparate supply domains.
How does the VCC isolation feature behave when VCCA is disconnected but VCCB remains active?
When VCCA drops below 100mV or floats, the SN74LVCC3245APWT forces all A- and B-port I/Os into high-impedance state regardless of DIR or OE state. This prevents back-driving of the A-bus and avoids contention on the B-bus - a critical safety feature during partial system power-down.
Can the SN74LVCC3245APWT translate from 5V to 2.5V in real time?
Yes. With VCCA = 2.5V and VCCB = 5V, the SN74LVCC3245APWT supports bidirectional translation: DIR = LOW enables B→A (5V→2.5V) data flow; DIR = HIGH enables A→B (2.5V→5V). Both paths operate simultaneously with sub-10ns propagation delay and full drive capability.
What is the thermal resistance (RθJA) of the SN74LVCC3245APWT in its TSSOP-24 package?
The SN74LVCC3245APWT in PW (TSSOP-24) package has a junction-to-ambient thermal resistance (RθJA) of 100.6°C/W. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with copper pour and thermal vias beneath the exposed pad area.
SN74LVCC3245APWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 2.3 V ~ 3.6 V
- Voltage - VCCB:
- 3 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP (0.173", 4.40mm Width)
SN74LVCC3245APWT FAQ
1.How can I place an order for SN74LVCC3245APWT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC3245APWT 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 SN74LVCC3245APWT reliable?
The price and inventory of SN74LVCC3245APWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC3245APWT is usually 5 days.
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SN74LVCC3245APWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC3245APWT 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 SN74LVCC3245APWT?
For technical support, including SN74LVCC3245APWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC3245APWT requirements.
6.How does Aetrix verify that SN74LVCC3245APWT is sourced from the original manufacturer or authorized distributors?
All SN74LVCC3245APWT 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 SN74LVCC3245APWT meets industry standards.
7.What is the process for return or replacement of SN74LVCC3245APWT?
All SN74LVCC3245APWT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC3245APWT, 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 SN74LVCC3245APWT part is unused and in its original packaging.
Return procedure for SN74LVCC3245APWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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