My Inquiry
My Account
Texas Instruments SN74LVCC4245APWTE4
- Part No.:
- SN74LVCC4245APWTE4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74LVCC4245APWTE4.pdf
- Description:
- IC TRANSLATOR BIDIR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,300
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVCC4245APWTE4 from Texas Instruments is an octal dual-supply bus transceiver enabling bidirectional voltage-level translation between 5V (A port) and 3.3V–5.5V (B port) buses, with 24mA drive strength at 3V, 3-state outputs controlled by DIR/OE, and VCC isolation for robust power sequencing. It serves in industrial motor control interfaces where mixed-voltage data exchange must avoid glitches during supply ramp-up/down.
For engineers reviewing the SN74LVCC4245APWTE4 datasheet, SN74LVCC4245APWTE4 pinout, SN74LVCC4245APWTE4 application, or SN74LVCC4245APWTE4 equivalent, key selection criteria include its dual-rail Ioff protection, 24mA B-port drive at 2.7V–3.6V, guaranteed high-impedance state when either VCCA or VCCB drops below 100mV, and compatibility with legacy SN74LVC4245 layouts.
Technical Context
The SN74LVCC4245APWTE4 implements asynchronous, noninverting bidirectional data transfer using separate VCCA (4.5V–5.5V) and VCCB (2.7V–5.5V) supplies, with DIR and OE inputs referenced to VCCA. Its Ioff circuitry ensures no backflow current when powered down, and VCC isolation forces both A/B ports into high-Z if either rail falls below 100mV or floats.
Propagation delays are specified for A→B and B→A directions across two VCCB ranges (2.7V–3.6V and 3.6V–5.5V), with tPHL/tPLH ≤7.1ns (A→B, VCCB=5V) and ≤6.8ns (B→A, VCCB=5V) at CL=50pF. Output enable/disable times (tPZL/tPHZ) range from 4.7ns to 10.2ns depending on direction and supply configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 4.5V to 5.5V - powers A port and all control logic (DIR/OE) |
| VCCB Range | 2.7V to 5.5V - powers B port and enables 3.3V↔5V bidirectional translation |
| Drive Strength | 24mA at 3V VCCB - supports heavier loads and longer PCB traces without signal degradation |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including servo drives and UPS systems |
| ESD Rating | 2000V HBM - meets JEDEC JESD22-A114 for handling in standard manufacturing |
| Ioff Leakage | ±2µA max - prevents damaging current backflow during partial power-down |
| Propagation Delay | ≤7.1ns (A→B, VCCB=5V) - enables high-speed inter-bus communication up to ~140MHz |
Pinout & Package
TSSOP-24 package (PW), 9.7mm × 6.4mm body size, 0.65mm lead pitch, thermally enhanced for industrial ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port supply | Powers A-side I/O and DIR/OE control logic; defines VIH/VIL thresholds for control inputs |
| 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 tied to 5V domain; supports 24mA sink/source when enabled |
| GND (Pins 11–13) | Ground reference | Three dedicated GND pins reduce ground bounce and improve noise immunity |
| B8–B1 (Pins 14–21) | B-port bidirectional I/O | 8-bit data path configurable for 3.3V/5V; output voltage tracks VCCB |
| OE (Pin 22) | Output enable (active low) | Drives all A/B ports to high-Z when high; referenced to VCCA |
| NC (Pin 23) | No connect | Internally unconnected; must remain floating or grounded per layout guidelines |
| VCCB (Pin 24) | B-port supply | Powers B-side I/O only; enables voltage translation independent of VCCA sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free power sequencing | Either VCCA or VCCB may be powered on/off in any order without spurious output transitions |
| VCC isolation | Both A and B ports enter high-Z if either VCCA or VCCB <100mV or floats - prevents bus contention |
| Configurable B-port output voltage | B-port VOH/VOL track VCCB (2.7V–5.5V), enabling direct interface to 3.3V or 5V peripherals |
| 24mA drive at 3V | Supports driving 50Ω transmission lines or multiple CMOS inputs without external buffers |
| Control inputs referenced to VCCA | DIR/OE logic thresholds scale with VCCA, ensuring reliable operation across full 4.5V–5.5V range |
Applications
| Industrial Servo Drive Interface | Three-Phase UPS Control Bus |
|---|---|
Use Scenario: Isolating 5V microcontroller command signals from 3.3V gate driver ICs in motor power stages while maintaining timing integrity during supply faults. IC Role / Device Role / Timing Role: Bidirectional level translator with VCC isolation, ensuring B-port remains high-Z if 3.3V rail collapses during overload. Use Value: Prevents false gate triggering and eliminates need for discrete level-shifting diodes or MOSFETs. | Use Scenario: Synchronizing digital control logic (5V FPGA) with analog sensing and protection circuits (3.3V ADCs, comparators) in grid-tied inverters. IC Role / Device Role / Timing Role: Asynchronous bus transceiver with sub-7ns propagation delay, supporting real-time fault response under varying load conditions. Use Value: Enables deterministic latency for overvoltage/overcurrent trip signals without adding software overhead. |
| PLC Backplane Data Link | Air Conditioner Outdoor Unit MCU |
Use Scenario: Interfacing 5V CPU modules with 3.3V I/O expansion cards across modular PLC chassis backplanes subject to hot-swap events. IC Role / Device Role / Timing Role: Dual-rail transceiver with Ioff protection, preventing backfeed current when a card is inserted/removed mid-operation. Use Value: Eliminates risk of damaging adjacent modules during field maintenance without requiring system shutdown. | Use Scenario: Connecting 5V HVAC controller MCU to 3.3V wireless communication module (Wi-Fi/BLE) and sensor hub in outdoor condenser units exposed to wide temperature swings. IC Role / Device Role / Timing Role: Robust level shifter rated for –40°C to +85°C, with ESD-hardened I/O (2000V HBM) for harsh environmental operation. Use Value: Reduces bill-of-materials by replacing discrete translation solutions while meeting IEC 61000-4-2 system-level ESD requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APWRE4 | Single 3.3V supply (VCC only); no VCCB rail or voltage translation capability | Only suitable for same-voltage (3.3V↔3.3V) bus isolation, not level shifting | Select when interfacing homogeneous 3.3V subsystems without mixed-voltage requirements |
| TXB0108PWR | Auto-direction sensing; no DIR pin; lower drive (±4mA); supports 1.2V–3.6V translation | Better for low-power, multi-drop I²C/SPI; unsuitable for high-drive industrial buses | Select for battery-powered sensor nodes; avoid for motor control due to insufficient drive strength |
Compared with SN74LVC4245APWRE4 and TXB0108PWR, the SN74LVCC4245APWTE4 uniquely delivers 24mA drive across dual rails with guaranteed glitch-free sequencing - making it the only choice for industrial 5V↔3.3V bus bridging where reliability under supply fault conditions is mandatory.
Availability
SN74LVCC4245APWTE4 is available at Aetrix Electronics and suitable for industrial servo drives, three-phase UPS systems, and PLC backplane interfaces requiring stable component supply across extended temperature and mixed-voltage operating conditions.
Supply support for SN74LVCC4245APWTE4 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 over 90 years of innovation in industrial, automotive, and communications markets.
The SN74LVCC4245APWTE4 belongs to TI's LVCC logic family, engineered specifically for robust voltage translation in industrial automation systems where supply sequencing resilience and high-current drive are critical design requirements.
FAQ
What is the maximum supported data rate for SN74LVCC4245APWTE4 in a 5V-to-3.3V translation setup?
The SN74LVCC4245APWTE4 does not specify a maximum data rate directly, but its worst-case propagation delay is 7.1ns (A→B, VCCB=5V, CL=50pF). This supports clean signal edges up to approximately 140MHz for non-return-to-zero (NRZ) data, assuming proper PCB layout and termination. For SN74LVCC4245APWTE4, actual achievable rate depends on load capacitance, trace length, and noise margin - not a fixed clock frequency limit.
Can SN74LVCC4245APWTE4 operate with VCCB = 2.7V while VCCA = 5.5V, and what are the output voltage limits?
Yes, SN74LVCC4245APWTE4 is fully specified for VCCB = 2.7V to 5.5V with VCCA = 4.5V to 5.5V. At VCCB = 2.7V, the B-port VOH is ≥2.2V (IOH = –12mA) and VOL is ≤0.44V (IOL = 12mA), meeting 2.7V LVTTL logic thresholds. The SN74LVCC4245APWTE4 maintains valid logic levels across this full range without external biasing.
Does SN74LVCC4245APWTE4 require external pull-up or pull-down resistors on DIR or OE inputs?
No, SN74LVCC4245APWTE4 does not require external biasing on DIR or OE. These inputs are CMOS with VIH = 2.0V (min) and VIL = 0.8V (max) referenced to VCCA, and internal input structure ensures defined logic states when driven directly from 5V-compatible controllers. External resistors are unnecessary unless noise immunity in high-EMI environments demands stronger static biasing.
How does the VCC isolation feature behave if VCCA is powered but VCCB is disconnected (floating)?
When VCCB is floating (disconnected) and VCCA is powered, the SN74LVCC4245APWTE4 detects VCCB <100mV and forces both A and B ports into high-impedance state - regardless of DIR or OE state. This prevents bus contention and protects downstream 3.3V devices. The SN74LVCC4245APWTE4 achieves this via internal monitoring circuitry tied to VCCB pin voltage.
Is SN74LVCC4245APWTE4 pin-compatible with SN74LVC4245APWRE4 on a TSSOP-24 footprint?
Yes, SN74LVCC4245APWTE4 uses the same PW (TSSOP-24) package and identical pinout as SN74LVC4245APWRE4, allowing drop-in replacement on existing PCBs. However, SN74LVCC4245APWTE4 requires connection of both VCCA (Pin 1) and VCCB (Pin 24), whereas SN74LVC4245APWRE4 ties VCC to Pin 1 only and leaves Pin 24 unused - board redesign is needed to route VCCB.
SN74LVCC4245APWTE4 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:
- 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)
SN74LVCC4245APWTE4 FAQ
1.How can I place an order for SN74LVCC4245APWTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCC4245APWTE4 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 SN74LVCC4245APWTE4 reliable?
The price and inventory of SN74LVCC4245APWTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCC4245APWTE4 is usually 5 days.
3.What payment methods are accepted for SN74LVCC4245APWTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCC4245APWTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCC4245APWTE4?
SN74LVCC4245APWTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCC4245APWTE4 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 SN74LVCC4245APWTE4?
For technical support, including SN74LVCC4245APWTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCC4245APWTE4 requirements.
6.How does Aetrix verify that SN74LVCC4245APWTE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVCC4245APWTE4 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 SN74LVCC4245APWTE4 meets industry standards.
7.What is the process for return or replacement of SN74LVCC4245APWTE4?
All SN74LVCC4245APWTE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCC4245APWTE4, 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 SN74LVCC4245APWTE4 part is unused and in its original packaging.
Return procedure for SN74LVCC4245APWTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVCC4245APWTE4 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…
