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Texas Instruments SN74LVCC4245APWT
- Part No.:
- SN74LVCC4245APWT
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC4245APWT.pdf
- Description:
- IC TRANSLATOR BIDIR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
SN74LVCC4245APWT from Texas Instruments is an octal dual-supply bus transceiver enabling bidirectional voltage-level translation between 5V (A port, VCCA = 4.5–5.5V) and 3.3V/2.7V–5.5V (B port, VCCB) domains, with 24mA output drive at 3V, 3-state outputs controlled by DIR/OE, and robust glitch-free power sequencing. It serves in industrial motor control interfaces where mixed-voltage subsystems require isolated, high-drive data coupling.
For engineers reviewing the SN74LVCC4245APWT datasheet, SN74LVCC4245APWT pinout, SN74LVCC4245APWT application, or SN74LVCC4245APWT equivalent, key selection criteria include dual-rail supply flexibility, Ioff partial-power-down protection, VCC isolation behavior (<100mV threshold), and compatibility with legacy SN74LVC4245 layouts in servo drive and UPS control modules.
Technical Context
The SN74LVCC4245APWT implements asynchronous, noninverting bidirectional data transfer using separate VCCA (5V domain) and VCCB (configurable 2.7–5.5V domain) rails, with DIR and OE inputs powered exclusively by VCCA. Its control logic remains functional even during asymmetric power-up sequences.
It features true VCC isolation: if either VCCA or VCCB drops below 100mV or floats, all A/B port I/Os enter high-impedance state-preventing backdrive and bus contention. The device supports 8-bit parallel translation with 24mA sink/source capability per output at 3V VCCB, meeting JESD 17 latch-up (>250mA) and JESD 22 ESD (2000V HBM, 1000V CDM) requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 4.5V to 5.5V - powers A port and all control circuitry (DIR/OE) |
| VCCB Range | 2.7V to 5.5V - configures B port output voltage level for 3.3V↔5V translation |
| Output Drive | ±24mA at 3V VCCB - supports heavy capacitive loads and long PCB traces without signal degradation |
| Propagation Delay | 1ns to 7.4ns (CL = 50pF) - enables reliable operation in high-speed industrial bus interfaces up to ~100MHz |
| Operating Temp | –40°C to +85°C - qualified for use in outdoor power electronics and industrial automation environments |
| Ioff Leakage | ±2µA max - prevents damaging current flow during partial power-down, critical for hot-swap systems |
| VCC Isolation Threshold | <100mV - ensures automatic high-Z transition when either rail fails or disconnects, enhancing system fault tolerance |
Pinout & Package
PW package: 24-pin TSSOP, 9.7mm × 6.4mm body, 0.65mm pitch, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port supply | 5V domain power source; powers DIR/OE logic and A-side I/O buffers |
| DIR (Pin 2) | Direction control input | High = A→B data flow; Low = B→A; referenced to VCCA for stable TTL-compatible thresholds |
| A1–A8 (Pins 3–10) | A-port bidirectional I/O | 5V-tolerant data lines; driven by VCCA, support 24mA drive only when enabled via OE/DIR |
| GND (Pins 11–13) | Ground reference | Three dedicated ground pins minimize ground bounce across 8-bit data path |
| B8–B1 (Pins 14–21) | B-port bidirectional I/O | VCCB-referenced data lines; voltage level tracks VCCB (2.7–5.5V), enabling flexible translation |
| OE (Pin 22) | Output enable (active low) | Asserting Low enables transceiver; High forces all A/B ports into high-impedance isolation |
| NC (Pin 23) | No connect | Internally unconnected; must be left floating or tied to GND per layout best practice |
| VCCB (Pin 24) | B-port supply | Configurable translation voltage rail; determines B-port VOH/VOL levels and drive strength |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free power sequencing | Enables arbitrary VCCA/VCCB power-on/off order without spurious I/O transitions-critical for modular power systems |
| VCC isolation | Automatic high-Z on both ports if either VCCA or VCCB falls below 100mV-eliminates need for external isolation logic |
| 24mA output drive at 3V | Supports driving 50Ω transmission lines or multiple CMOS inputs over >10cm PCB traces without termination |
| Ioff partial-power-down protection | Prevents back-current flow when VCCA or VCCB is unpowered-enables safe hot-swap in PLC backplanes |
| SN74LVC4245 pinout alignment | Pins 2–11 and 14–23 match industry-standard '245 footprint-allows drop-in replacement without board redesign |
Applications
| Data Concentrator Interface | Servo Drive Power Stage |
|---|---|
Use Scenario: Aggregating sensor data from mixed-voltage field devices (3.3V ADCs, 5V encoders) into a central 5V controller. IC Role / Device Role / Timing Role: Voltage-level translating bus transceiver isolating and synchronizing data paths between disparate supply domains. Use Value: Eliminates level-shifter ICs and discrete resistor networks while maintaining signal integrity across 8-channel parallel links. | Use Scenario: Interfacing a 5V FPGA motion controller with 3.3V gate-driver ICs in a three-phase motor inverter stage. IC Role / Device Role / Timing Role: Bidirectional command/status bus translator with fast propagation (<7.4ns) and high noise immunity. Use Value: Enables real-time PWM command updates and fault feedback without timing skew or voltage incompatibility risks. |
| Three-Phase UPS Control | PLC Digital I/O Module |
Use Scenario: Coupling 5V microcontroller communication buses to 3.3V auxiliary monitoring circuits (voltage/current sensing, fan control). IC Role / Device Role / Timing Role: Asynchronous, direction-controlled transceiver supporting isolated enable/disable of data paths during fault conditions. Use Value: Provides galvanically isolated signal routing via VCC disconnect-no external optocouplers needed for basic domain separation. | Use Scenario: Extending 5V CPU bus to remote 3.3V digital I/O expansion cards in distributed control cabinets. IC Role / Device Role / Timing Role: High-drive, 8-bit bus buffer with Ioff and thermal shutdown resilience for industrial backplane environments. Use Value: Delivers 24mA per line to drive long cables and LED indicators while surviving repeated hot-plug cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APW | Single 3.3V supply (VCC = 3.3V); no dual-rail translation; lower drive (24mA only at 3.3V), no VCC isolation | Only suitable for uniform 3.3V systems; cannot translate between 3.3V and 5V domains | Select when cost and simplicity outweigh mixed-voltage needs; verify absence of VCC sequencing risk |
| TXB0108PWR | Auto-direction sensing; single 1.2–3.6V supply; lower drive (±2mA); no DIR/OE pins; higher propagation delay (up to 22ns) | Designed for I²C/SPI level shift-not optimized for wide parallel buses or high-speed control signals | Prefer for low-power, low-pin-count serial interfaces; avoid for 8-bit synchronous bus applications requiring <8ns timing |
Compared with SN74LVC4245APW and TXB0108PWR, the SN74LVCC4245APWT uniquely delivers configurable dual-rail translation with industrial-grade drive strength, VCC isolation, and pinout compatibility-making it the only option among the three qualified for high-reliability, mixed-voltage motor control and UPS applications.
Availability
SN74LVCC4245APWT is available at Aetrix Electronics and suitable for servo drive power stage modules, three-phase UPS controllers, and PLC digital I/O modules requiring stable component supply across extended temperature and mixed-voltage operating conditions.
Supply support for SN74LVCC4245APWT 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 SN74LVCC4245APWT belongs to TI's LVCC logic family, engineered specifically for robust voltage translation in harsh industrial environments where supply sequencing, fault isolation, and high-output drive are mandatory design requirements.
FAQ
What voltage levels can SN74LVCC4245APWT translate between?
The SN74LVCC4245APWT translates bidirectionally between 5V (A port, VCCA = 4.5–5.5V) and 2.7–5.5V (B port, VCCB). It supports common configurations like 5V ↔ 3.3V and 5V ↔ 2.7V, with output voltage levels and drive strength directly tracking VCCB. This makes SN74LVCC4245APWT ideal for interfacing legacy 5V controllers with modern 3.3V peripherals without external level-shifting components.
Does SN74LVCC4245APWT support hot-swap or partial power-down operation?
Yes, SN74LVCC4245APWT includes Ioff circuitry that disables outputs and limits leakage to ±2µA when either VCCA or VCCB is unpowered, preventing damaging back-current flow. Its VCC isolation feature forces all I/Os into high-impedance state if either supply drops below 100mV-making SN74LVCC4245APWT suitable for hot-pluggable modules and systems with staggered power sequencing.
Is SN74LVCC4245APWT pin-compatible with SN74LVC4245APW?
Yes-pins 2–11 (DIR through A8) and 14–23 (B8 through OE) of SN74LVCC4245APWT align with the standard SN74LVC4245APW 24-pin TSSOP footprint. This allows direct PCB replacement in existing designs, though SN74LVCC4245APWT requires separate VCCA/VCCB supplies whereas SN74LVC4245APW uses a single VCC. Designers must verify supply routing before substitution.
What is the maximum data rate supported by SN74LVCC4245APWT?
SN74LVCC4245APWT achieves propagation delays as low as 1ns (typical) with CL = 50pF, supporting reliable operation at bus frequencies up to ~100MHz in well-terminated, low-noise layouts. Real-world throughput depends on trace length, load capacitance, and slew-rate constraints; for 8-bit parallel control buses in servo drives, SN74LVCC4245APWT consistently delivers sub-8ns edge-to-edge timing across temperature.
How does the DIR and OE control logic operate in SN74LVCC4245APWT?
In SN74LVCC4245APWT, DIR (pin 2) selects data direction: DIR = High enables A→B transfer; DIR = Low enables B→A transfer. OE (pin 22) is active-low-when asserted Low, transceiver operates; when High, all A/B ports enter high-impedance isolation. Both DIR and OE are powered by VCCA and referenced to VCCA thresholds (VIH = 2V min, VIL = 0.8V max), ensuring stable control under varying VCCB conditions.
SN74LVCC4245APWT 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:
- 4.5 V ~ 5.5 V
- Voltage - VCCB:
- 2.7 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)
SN74LVCC4245APWT FAQ
1.How can I place an order for SN74LVCC4245APWT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC4245APWT 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 SN74LVCC4245APWT reliable?
The price and inventory of SN74LVCC4245APWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC4245APWT is usually 5 days.
3.What payment methods are accepted for SN74LVCC4245APWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC4245APWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCC4245APWT?
SN74LVCC4245APWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC4245APWT 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 SN74LVCC4245APWT?
For technical support, including SN74LVCC4245APWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC4245APWT requirements.
6.How does Aetrix verify that SN74LVCC4245APWT is sourced from the original manufacturer or authorized distributors?
All SN74LVCC4245APWT 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 SN74LVCC4245APWT meets industry standards.
7.What is the process for return or replacement of SN74LVCC4245APWT?
All SN74LVCC4245APWT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC4245APWT, 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 SN74LVCC4245APWT part is unused and in its original packaging.
Return procedure for SN74LVCC4245APWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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