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Texas Instruments SN74LVCC3245APWTG4
- Part No.:
- SN74LVCC3245APWTG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC3245APWTG4.pdf
- Description:
- IC TRANSLATOR BIDIR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,730
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Product details
Overview
SN74LVCC3245APWTG4 from Texas Instruments is an octal noninverting bus transceiver with dual supply rails (VCCA: 2.3–3.6 V, VCCB: 3–5.5 V), enabling bidirectional level translation between 2.5/3.3 V and 5 V domains. It features 3-state outputs controlled by DIR and active-low OE, 24 mA drive strength at 3 V, and VCC isolation that forces high-impedance I/O when either supply drops below 100 mV - used in ultrasound scanner data buses for safe inter-domain signal routing.
For engineers reviewing the SN74LVCC3245APWTG4 datasheet, SN74LVCC3245APWTG4 pinout, SN74LVCC3245APWTG4 application, or SN74LVCC3245APWTG4 equivalent, key selection criteria include its asymmetric voltage tracking (VCCA-referenced control inputs), glitch-free power sequencing, Ioff partial-power-down protection, and TSSOP-24 package compatibility with space-constrained industrial control and inverter PCBs.
Technical Context
The SN74LVCC3245APWTG4 implements a direction-controlled, dual-rail architecture where A-port logic levels track VCCA and B-port levels track VCCB. Control signals (DIR, OE) are referenced solely to VCCA, ensuring consistent enable/disable behavior regardless of VCCB voltage. Its internal circuitry guarantees no output glitches during arbitrary power-up/down sequences of VCCA or VCCB.
VCC isolation is implemented via dedicated sensing circuitry: if either VCCA or VCCB falls below ~100 mV or floats, all 16 I/Os (A1–A8, B1–B8) enter high-impedance state simultaneously. The device supports full Ioff protection, limiting backflow current to ±2 µA per I/O when powered down, meeting JESD 17 latch-up immunity (>250 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 2.3 V to 3.6 V - defines minimum/maximum supply for A-side logic and control inputs (DIR/OE) |
| VCCB Range | 3 V to 5.5 V - sets operating window for B-side I/O voltage translation and drive capability |
| Drive Strength | 24 mA at 3 V - enables direct interface to heavy capacitive loads (e.g., long traces, multiple CMOS inputs) without external buffers |
| Propagation Delay | ≤9.4 ns (A→B, VCCA=2.5 V/VCCB=3.3 V) - supports >100 MHz data rates in synchronous bus applications |
| Ioff Leakage | ±2 µA max - prevents damaging current flow during partial power-down, critical for hot-swap and power-gated systems |
| ESD Rating | ±2000 V HBM - exceeds JEDEC JS-001 requirements for robust handling in manufacturing and field environments |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade operation in inverters, medical imaging, and embedded computing |
Pinout & Package
TSSOP-24 package (7.8 mm × 6.4 mm), lead pitch 0.65 mm, thermally enhanced for industrial ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port power supply | Reference for A-side I/O thresholds and all control inputs (DIR, OE); must be stable before enabling |
| DIR (Pin 2) | Direction control input | High = A→B data flow; Low = B→A flow; referenced to VCCA, not VCCB |
| A1–A8 (Pins 3–10) | A-port bidirectional I/O | Track VCCA voltage; tolerate up to VCCA + 0.5 V input; drive up to 24 mA sink/source |
| GND (Pins 11, 12) | Ground reference | Common return for both supply domains; must be low-impedance and star-connected |
| OE (Pin 22) | Output enable (active low) | Pulls all A/B I/Os into 3-state when high; VCCA-referenced; enables bus isolation during reset |
| B1–B8 (Pins 14–21) | B-port bidirectional I/O | Track VCCB voltage; tolerate up to VCCB + 0.5 V input; compatible with 5 V TTL/CMOS loads |
| VCCB (Pin 24) | B-port power supply | Reference for B-side I/O thresholds; independent sequencing allowed due to glitch-free design |
| NC (Pins 13, 23) | No internal connection | Unbonded die pads; must remain unconnected on PCB to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional level translation | Enables interoperability between 2.5 V/3.3 V controllers and 5 V peripherals without external resistors or discrete translators |
| VCC isolation | Automatic high-Z I/O state when either VCCA or VCCB <100 mV - eliminates need for external power-fail detection circuitry |
| Glitch-free power sequencing | Supports arbitrary VCCA/VCCB ramp order (e.g., VCCB powered first, VCCA later) without spurious output transitions |
| Ioff partial-power-down | Limits leakage to ±2 µA per pin during system sleep modes - preserves battery life and prevents bus contention |
| VCCA-referenced controls | DIR and OE thresholds scale with VCCA, ensuring reliable operation across full 2.3–3.6 V A-port supply range |
Applications
| Ultrasound Scanner Data Interface | String Inverter Communication Bus |
|---|---|
|
Use Scenario: Isolating FPGA-based beamformer (3.3 V) from analog front-end ASIC (5 V) while maintaining real-time echo data throughput. IC Role / Device Role / Timing Role: Bidirectional level translator managing 8-bit parallel data path with sub-10 ns propagation delay and zero-glitch handshaking. Use Value: Eliminates timing skew between domains and prevents false resets during power cycling of subsystems. |
Use Scenario: Interfacing microcontroller (3.3 V) to isolated gate driver ICs (5 V) in photovoltaic string-level MPPT control loops. IC Role / Device Role / Timing Role: Direction-controlled bus transceiver synchronizing PWM command updates and fault feedback across voltage domains. Use Value: Enables deterministic 3-state isolation during fault conditions, preventing latch-up in high-voltage gate drivers. |
| Central Inverter Monitoring Interface | Single Board Computer Expansion Bus |
|
Use Scenario: Connecting ARM SoC (2.5 V I/O) to legacy 5 V sensor hub and CAN transceiver in grid-tied inverter monitoring subsystem. IC Role / Device Role / Timing Role: Dual-supply transceiver supporting mixed-voltage peripheral expansion with VCCB = 5 V and VCCA = 2.5 V. Use Value: Maintains signal integrity across 2.5 V → 5 V translation while tolerating slow-ramp auxiliary supplies. |
Use Scenario: Extending GPIO and address/data lines from 3.3 V SBC to 5 V industrial I/O modules (relays, ADCs, displays). IC Role / Device Role / Timing Role: Octal bus transceiver providing 3-state isolation and 24 mA drive for driving capacitive expansion connectors. Use Value: Reduces need for external buffer ICs and simplifies layout by integrating level shift + drive + isolation in one TSSOP-24 package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245RHLR | Single-supply (1.2–3.6 V), no VCCB rail; lower drive (12 mA), no VCC isolation | Suitable only for 1.2–3.6 V domain bridging; cannot translate to 5 V | Select when interfacing only sub-3.6 V systems and board space is constrained (VQFN-24) |
| TXB0108PWR | Auto-direction sensing (no DIR pin), 3.6 V max VCCA, no VCCB > 5 V support, higher quiescent current | Eliminates direction control wiring but lacks deterministic DIR override for synchronous protocols | Prefer for I²C/SPI where direction is data-driven; avoid for parallel bus control requiring explicit DIR assertion |
Compared with SN74LVCC3245APWTG4, SN74AVC8T245RHLR lacks 5 V compatibility and VCC isolation, while TXB0108PWR trades explicit direction control for automatic sensing - making SN74LVCC3245APWTG4 the only choice for deterministic, high-drive, 5 V-capable bidirectional translation with robust power sequencing.
Availability
SN74LVCC3245APWTG4 is available at Aetrix Electronics and suitable for ultrasound scanner interfaces, solar string inverters, central inverter monitoring systems, and single-board computer expansion buses requiring stable component supply and industrial temperature compliance.
Supply support for SN74LVCC3245APWTG4 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 solutions, with decades of expertise in high-reliability interface ICs.
The SN74LVCC3245A belongs to TI's LVCC logic family, engineered specifically for robust voltage-domain bridging in industrial, medical, and renewable energy systems where supply sequencing unpredictability and mixed-voltage interoperability are critical.
FAQ
What voltage ranges does the SN74LVCC3245APWTG4 support on its A and B ports?
The SN74LVCC3245APWTG4 supports 2.3 V to 3.6 V on the A port (VCCA) and 3 V to 5.5 V on the B port (VCCB). This allows translation from 2.5 V/3.3 V logic to 5 V systems and vice versa. Control inputs DIR and OE are referenced exclusively to VCCA, ensuring stable operation across the full A-port supply range. The device is not rated for operation outside these limits.
Does the SN74LVCC3245APWTG4 require specific power supply sequencing?
No - the SN74LVCC3245APWTG4 features glitch-free power supply sequencing, meaning VCCA and VCCB may be powered on or off in any order without causing spurious output transitions. This eliminates sequencing constraints in complex multi-rail systems. The VCC isolation feature further ensures all I/Os go high-impedance if either supply drops below ~100 mV or floats.
How does the SN74LVCC3245APWTG4 handle partial power-down conditions?
The SN74LVCC3245APWTG4 incorporates Ioff circuitry that limits input/output leakage to ±2 µA when either VCCA or VCCB is at 0 V, preventing damaging current backflow. This enables safe partial power-down in systems where one domain remains active while another is disabled - essential for power-gated subsystems in inverters and medical equipment.
What is the maximum data rate supported by the SN74LVCC3245APWTG4?
Based on its worst-case propagation delay of 11.2 ns (B→A, VCCA=2.5 V/VCCB=3.3 V), the SN74LVCC3245APWTG4 supports reliable operation up to approximately 89 MHz for single-bit toggling. For 8-bit parallel buses, system-level timing margins depend on trace length and loading, but the device is routinely deployed in 25–50 MHz synchronous bus interfaces in ultrasound and inverter applications.
Is the SN74LVCC3245APWTG4 pin-compatible with other TI octal transceivers like the SN74LVC8T245?
No - the SN74LVCC3245APWTG4 is not pin-compatible with SN74LVC8T245. While both are octal transceivers in TSSOP-24 packages, SN74LVCC3245APWTG4 has dedicated VCCA (Pin 1) and VCCB (Pin 24) supplies, whereas SN74LVC8T245 uses a single VCC (Pin 1). Pin assignments for DIR, OE, and I/Os differ significantly; PCB redesign is required for substitution.
SN74LVCC3245APWTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SN74LVCC3245APWTG4 FAQ
1.How can I place an order for SN74LVCC3245APWTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC3245APWTG4 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 SN74LVCC3245APWTG4 reliable?
The price and inventory of SN74LVCC3245APWTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC3245APWTG4 is usually 5 days.
3.What payment methods are accepted for SN74LVCC3245APWTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC3245APWTG4 transactions.
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4.How is shipping managed for SN74LVCC3245APWTG4?
SN74LVCC3245APWTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC3245APWTG4 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 SN74LVCC3245APWTG4?
For technical support, including SN74LVCC3245APWTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC3245APWTG4 requirements.
6.How does Aetrix verify that SN74LVCC3245APWTG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVCC3245APWTG4 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 SN74LVCC3245APWTG4 meets industry standards.
7.What is the process for return or replacement of SN74LVCC3245APWTG4?
All SN74LVCC3245APWTG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC3245APWTG4, 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 SN74LVCC3245APWTG4 part is unused and in its original packaging.
Return procedure for SN74LVCC3245APWTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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