My Inquiry
My Account
Texas Instruments SN74LVCC4245ADWRE4
- Part No.:
- SN74LVCC4245ADWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC4245ADWRE4.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,095
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVCC4245ADWRE4 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/5V (B port, VCCB = 2.7–5.5V), with 24mA output drive at 3V, 3-state outputs controlled by DIR/OE, and robust power sequencing. It isolates buses in industrial servo drives and PLC backplanes.
For engineers reviewing the SN74LVCC4245ADWRE4 datasheet, SN74LVCC4245ADWRE4 pinout, SN74LVCC4245ADWRE4 application, or SN74LVCC4245ADWRE4 equivalent, key selection criteria include dual-rail Ioff protection, VCC isolation behavior (<100mV disable threshold), guaranteed 7ns max propagation delay (A↔B), and SOIC-24 package compatibility with legacy '245 layouts.
Technical Context
The SN74LVCC4245ADWRE4 implements asynchronous, direction-controlled data flow using separate VCCA (5V domain) and VCCB (3.3V/5V configurable domain) rails, with DIR and OE inputs referenced solely to VCCA. Its control logic remains active during partial power-down, enabling safe hot-swap operation.
It features true VCC isolation: if either VCCA or VCCB falls below 100mV or floats, all A/B I/Os enter high-impedance state-preventing backdrive and latch-up. The device meets JESD 17 latch-up immunity (>250mA) and exceeds JESD 22 ESD ratings (2000V HBM, 1000V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 4.5V to 5.5V - powers A-port I/O and all control circuitry (DIR/OE) |
| VCCB Range | 2.7V to 5.5V - configures B-port output voltage level for 3.3V↔5V bidirectional translation |
| Output Drive | ±24mA at 3V VCCB - supports heavier capacitive loads and longer PCB traces without signal degradation |
| Propagation Delay | 1ns to 7.1ns (CL = 50pF) - enables reliable timing in 100MHz-class parallel bus interfaces |
| Operating Temperature | –40°C to +85°C - qualified for industrial motor control and outdoor power electronics environments |
| Ioff Leakage | ±2µA max - prevents damaging current backflow when either supply is powered down |
| ESD Rating | 2000V HBM, 1000V CDM - exceeds JEDEC standards for manufacturing and field reliability |
Pinout & Package
Packaged in a 24-pin SOIC (DW) with 15.5mm × 10.3mm footprint, SN74LVCC4245ADWRE4 uses standard '245-compatible pinout for drop-in replacement in existing designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port supply rail | Powers A-side I/O and all control inputs (DIR/OE); defines VIH/VIL thresholds |
| DIR (Pin 2) | Direction control input | Low = B→A data flow; High = A→B data flow; referenced to VCCA |
| A1–A8 (Pins 3–10) | A-port bidirectional I/O | 8-bit data path for 5V domain; high-impedance when OE = High or VCCA <100mV |
| GND (Pins 11–13) | Ground reference | Three dedicated ground pins minimize noise coupling and improve signal integrity |
| B8–B1 (Pins 14–21) | B-port bidirectional I/O | 8-bit data path for 3.3V/5V domain; output voltage tracks VCCB |
| OE (Pin 22) | Output enable (active-low) | High = all I/Os disabled (high-Z); Low = enabled per DIR state; referenced to VCCA |
| NC (Pin 23) | No-connect | Internally unconnected; must be left floating or tied to GND (no voltage applied) |
| VCCB (Pin 24) | B-port supply rail | Sets B-port output voltage level; enables VCC isolation when <100mV or floating |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail Ioff protection | Prevents back-current flow during partial power-down, eliminating need for external isolation circuitry |
| VCC isolation | Automatic high-impedance entry on either VCCA or VCCB <100mV - critical for hot-plug and modular power systems |
| Glitch-free power sequencing | Allows VCCA/VCCB to power up/down in any order without spurious I/O transitions that could reset downstream peripherals |
| 24mA B-port drive at 3V | Supports driving 50Ω transmission lines or multiple CMOS loads without external buffers |
| SOIC-24 pin compatibility | Matches SN74LVC4245A layout - enables upgrade to higher drive and dual-rail isolation without PCB redesign |
Applications
| Industrial Servo Drives | PLC Backplane Interfaces |
|---|---|
Use Scenario: Bidirectional data exchange between 5V FPGA-based motion controllers and 3.3V encoder feedback ICs in closed-loop servo modules. IC Role / Device Role / Timing Role: Voltage-translating bus transceiver managing real-time position command and status signals across supply domains. Use Value: Eliminates level-shifter discretes while providing 24mA drive for noisy motor-control environments and VCC isolation during emergency stop sequences. |
Use Scenario: Interfacing 5V CPU modules with 3.3V I/O expansion cards in programmable logic controller chassis. IC Role / Device Role / Timing Role: Octal transceiver enabling hot-swappable card detection and configuration via isolated control/data buses. Use Value: Glitch-free sequencing prevents false resets during card insertion/removal; Ioff protects backplane during partial power-down. |
| Three-Phase UPS Control | Outdoor Air Conditioner Units |
Use Scenario: Communication between 5V digital signal processor (DSP) and 3.3V isolated gate drivers in three-phase inverter stages. IC Role / Device Role / Timing Role: Direction-controlled translator synchronizing PWM command updates and fault reporting across isolated domains. Use Value: 7ns max propagation delay ensures tight timing margins; ±24mA drive sustains signal integrity over long control board traces. |
Use Scenario: Data bridging between 5V microcontroller and 3.3V environmental sensors (temperature, humidity) in outdoor HVAC units. IC Role / Device Role / Timing Role: Level-shifting transceiver handling UART and SPI traffic in thermally stressed enclosures. Use Value: –40°C to +85°C rating ensures reliability in uncontrolled ambient conditions; VCCB tracking maintains stable logic thresholds across voltage drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245ADWRE4 | Single 3.3V supply only (VCC = 3.3V); no VCCB configurability or VCC isolation | Lacks dual-rail operation and automatic isolation - unsuitable for mixed-voltage hot-swap systems | Select when cost-sensitive, single-rail 3.3V systems require basic translation without sequencing robustness |
| TXB0108PWR | Auto-direction sensing (no DIR pin); lower drive (±2mA); 1.2V–3.6V I/O range | Designed for low-voltage portable interfaces, not industrial 5V↔3.3V backplanes | Select only for battery-powered, low-power, auto-direction applications - not for deterministic DIR-controlled industrial buses |
Compared with SN74LVC4245ADWRE4 and TXB0108PWR, SN74LVCC4245ADWRE4 uniquely delivers 5V↔3.3V bidirectional translation with guaranteed VCC isolation, 24mA drive, and glitch-free sequencing - making it the sole choice for industrial control backplanes requiring robust power management and signal integrity.
Availability
SN74LVCC4245ADWRE4 is available at Aetrix Electronics and suitable for industrial servo drives, PLC backplane interfaces, three-phase UPS control, and outdoor HVAC systems requiring stable component supply across extended temperature and mixed-voltage operating conditions.
Supply support for SN74LVCC4245ADWRE4 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 technologies, with decades of expertise in industrial-grade interface solutions.
SN74LVCC4245ADWRE4 belongs to TI's LVCC logic family, engineered specifically for robust voltage translation in harsh industrial environments where supply sequencing, isolation, and high-drive capability are mission-critical.
FAQ
What is the maximum propagation delay of SN74LVCC4245ADWRE4 under typical operating conditions?
The maximum propagation delay for SN74LVCC4245ADWRE4 is 7.1ns (tPHL, A→B) and 6.8ns (tPHL, B→A) when VCCA = 5V, VCCB = 2.7–3.6V, CL = 50pF, and TA = 25°C. These values ensure timing compliance in high-speed parallel bus applications up to 100MHz, as verified in Section 5.6 of the official datasheet.
Does SN74LVCC4245ADWRE4 support true bidirectional voltage translation between 5V and 3.3V domains?
Yes, SN74LVCC4245ADWRE4 supports true bidirectional translation: A port operates at 4.5–5.5V (VCCA), B port tracks VCCB (2.7–5.5V), enabling seamless 5V↔3.3V data flow in either direction based on the DIR input. This is confirmed in the Functional Description (Section 3) and Recommended Operating Conditions (Section 5.3).
How does the VCC isolation feature work in SN74LVCC4245ADWRE4?
SN74LVCC4245ADWRE4 enters full high-impedance on both A and B ports when either VCCA or VCCB drops below 100mV or is left floating - preventing backdrive and ensuring system-level safety during power faults. This behavior is explicitly defined in Section 10.3.2 and validated in the Absolute Maximum Ratings table.
Can SN74LVCC4245ADWRE4 replace SN74LVC4245ADWRE4 on an existing PCB?
Yes, SN74LVCC4245ADWRE4 uses identical SOIC-24 pinout and footprint as SN74LVC4245ADWRE4, allowing direct replacement. However, SN74LVCC4245ADWRE4 adds VCCB supply and VCC isolation - requiring connection of VCCB and review of power sequencing; unused NC pin (23) must remain unconnected.
What is the output drive strength of SN74LVCC4245ADWRE4 at 3.3V VCCB?
At VCCB = 3.3V, SN74LVCC4245ADWRE4 delivers ±24mA output drive (IOL/IOH), as specified in Section 5.3 (Recommended Operating Conditions) and confirmed in Electrical Characteristics (Section 5.5). This enables direct driving of heavy capacitive loads or multiple CMOS inputs without external buffers.
SN74LVCC4245ADWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SOIC (0.295", 7.50mm Width)
SN74LVCC4245ADWRE4 FAQ
1.How can I place an order for SN74LVCC4245ADWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC4245ADWRE4 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 SN74LVCC4245ADWRE4 reliable?
The price and inventory of SN74LVCC4245ADWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC4245ADWRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVCC4245ADWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC4245ADWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCC4245ADWRE4?
SN74LVCC4245ADWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC4245ADWRE4 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 SN74LVCC4245ADWRE4?
For technical support, including SN74LVCC4245ADWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC4245ADWRE4 requirements.
6.How does Aetrix verify that SN74LVCC4245ADWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVCC4245ADWRE4 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 SN74LVCC4245ADWRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVCC4245ADWRE4?
All SN74LVCC4245ADWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC4245ADWRE4, 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 SN74LVCC4245ADWRE4 part is unused and in its original packaging.
Return procedure for SN74LVCC4245ADWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVCC4245ADWRE4 Tags
-
74LVC1T45GW,125
Nexperia USA Inc.
-
74LVCH2T45DC,125
Nexperia USA Inc.
-
SN74LVC1T45DBVR
Texas Instruments
-
SN74LVC1T45DRLR
Texas Instruments
-
SN74LVC1T45DPKR
Texas Instruments
-
SN74LVC2T45DCTR
Texas Instruments
-
74LVC2T45GT,115
Nexperia USA Inc.
-
SN74LVC1T45YZPR
Texas Instruments
-
LSF0102DCUR
Texas Instruments
-
SN74LVC1T45DCKR
Texas Instruments
-
TXS0102DCTR
Texas Instruments
-
FXLP34P5X
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
