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Diodes Incorporated 74LVCH2T45RA3-7
- Part No.:
- 74LVCH2T45RA3-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74LVCH2T45RA3-7.pdf
- Description:
- IC TRANSLATOR BIDIR X2DFN1210-8
- Quantity:
- Payment:
- Shipping:
Inventory:18,938
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Product details
Overview
74LVCH2T45RA3-7 from Diodes Incorporated is a dual-bit, dual-supply translating transceiver with tri-state outputs and bus-hold inputs, designed for bidirectional voltage-level translation between 1.2V and 5.5V domains. It features independent VCC(A) and VCC(B) supplies, DIR-controlled data direction, ±24mA drive at 3.3V, and IOFF protection enabling partial power-down isolation. It is used in mobile SoC interconnects where mixed-voltage GPIO bridging is required.
For engineers reviewing the 74LVCH2T45RA3-7 datasheet, 74LVCH2T45RA3-7 pinout, 74LVCH2T45RA3-7 application, or 74LVCH2T45RA3-7 equivalent, this device supports high-speed bidirectional translation (up to 420Mbps), operates across industrial and extended temperature ranges (–40°C to +125°C), and delivers robust ESD immunity (4kV HBM) with bus-hold functionality eliminating external pull resistors.
Technical Context
The 74LVCH2T45RA3-7 implements a dual-channel, direction-controlled bus transceiver architecture with separate supply rails per port. Its DIR pin determines real-time data flow direction: HIGH enables A→B translation, LOW enables B→A translation. Each port supports independent logic thresholds tied to its respective VCC.
It integrates bus-hold circuitry on all four I/O pins (1A, 2A, 1B, 2B), maintaining last-valid logic state without external biasing. The IOFF feature asserts high-impedance on all pins when either VCC drops to 0V, preventing back-drive current and enabling safe hot-insertion in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range (A & B) | 1.2V to 5.5V each - enables translation between any two logic domains in modern low-voltage embedded systems |
| Max Data Rate | 420Mbps (3.3V→5V) - supports high-throughput interface bridging in portable electronics |
| Output Drive | ±24mA at 3.3V - ensures reliable signal integrity driving capacitive loads up to 15pF |
| IOFF Leakage | ±1μA max when either VCC = 0V - guarantees electrical isolation during partial power-down |
| ESD Rating | 4kV HBM, 1kV CDM - meets robustness requirements for handheld and automotive-adjacent applications |
| Operating Temp | –40°C to +125°C - qualified for under-hood and industrial control environments |
| Bus-Hold Current | ±100μA max at 3.0V - actively sustains valid logic levels on floating inputs without pull resistors |
Pinout & Package
X2-DFN1210-8 package: 1.2mm × 1.0mm, 0.4mm pitch, bottom thermal pad, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1B | Data I/O (Port B) | Bidirectional signal terminal referenced to VCC(B); supports 1.2V–5.5V logic levels |
| GND | Ground Reference | Common return path for both supply domains; must be low-inductance connection |
| 2B | Data I/O (Port B) | Second bidirectional signal terminal on Port B; shares VCC(B) and bus-hold behavior with 1B |
| 1A | Data I/O (Port A) | Bidirectional signal terminal referenced to VCC(A); independent voltage domain from Port B |
| 2A | Data I/O (Port A) | Second bidirectional signal terminal on Port A; shares VCC(A) and bus-hold behavior with 1A |
| DIR | Direction Control Input | Active-HIGH control: HIGH → A inputs / B outputs; LOW → B inputs / A outputs |
| VCC(B) | Port B Supply | Power rail defining logic thresholds and output swing for 1B/2B pins |
| VCC(A) | Port A Supply | Power rail defining logic thresholds and output swing for 1A/2A pins |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply rails | VCC(A) and VCC(B) each configurable from 1.2V to 5.5V - eliminates need for external level-shifting components |
| Integrated bus-hold on all I/Os | Maintains last-valid logic state without external resistors - reduces BOM count and PCB area in space-constrained designs |
| IOFF partial-power-down protection | High-impedance state activated when either VCC = 0V - prevents back-current and enables safe system sleep modes |
| Wide temperature operation | Specified from –40°C to +125°C - supports deployment in automotive infotainment and industrial edge controllers |
| Low ICC quiescent current | 16μA max at +25°C - minimizes standby power in battery-powered devices such as wearables and IoT sensors |
Applications
| Mobile SoC Interconnect | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Bridging 1.8V application processor GPIOs to 3.3V sensor hub or PMIC interface in smartphones and tablets. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing data flow direction via DIR signal; supports 210Mbps throughput at 1.8V→3.3V. Use Value: Eliminates discrete resistor networks and saves >0.5mm² PCB area per channel while ensuring glitch-free handshaking during voltage domain transitions. |
Use Scenario: Connecting 2.5V FPGA configuration I/O to 5V industrial fieldbus transceivers in programmable logic controllers. IC Role / Device Role / Timing Role: Level-shifting transceiver enabling interoperability between low-voltage logic and legacy 5V peripherals. Use Value: IOFF protection isolates FPGA I/O during 5V bus power cycling, preventing latch-up and enabling hot-swap capability. |
| Automotive ADAS Camera Interface | Server Memory Subsystem Bridging |
Use Scenario: Translating MIPI D-PHY control signals between 1.2V image sensor and 1.8V SoC in rear-view camera modules. IC Role / Device Role / Timing Role: Low-skew dual-channel translator with <5.5ns propagation delay (VCC(A)=1.2V, VCC(B)=1.8V) meeting MIPI timing budgets. Use Value: Bus-hold maintains stable control lines during sensor power sequencing, avoiding undefined states that could trigger false camera resets. |
Use Scenario: Isolating DDR4 memory controller address/command lines (1.2V) from 3.3V thermal monitoring ICs in enterprise servers. IC Role / Device Role / Timing Role: Direction-controlled buffer providing electrical isolation and voltage translation for non-critical monitoring paths. Use Value: Enables independent power gating of thermal subsystem without affecting memory controller operation - improves system-level energy efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply translating transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2T45DCUR | No bus-hold; lower ESD rating (2kV HBM); same pinout and VCC range | Requires external pull resistors on unused I/Os; less suitable for high-reliability or space-constrained layouts | Select when cost sensitivity outweighs bus-hold benefit and board layout allows discrete biasing |
| TXS0102DCKR | Auto-direction sensing (no DIR pin); lower drive strength (±8mA); higher ICC (20μA) | Eliminates direction-control logic but limits max speed to 60Mbps; unsuitable for deterministic high-speed protocols | Prefer for simple GPIO expansion where direction is predictable and speed <100Mbps suffices |
Compared with SN74LVC2T45DCUR and TXS0102DCKR, the 74LVCH2T45RA3-7 uniquely combines bus-hold, 420Mbps capability, and IOFF protection in a 1.2mm×1.0mm DFN - making it optimal for miniaturized, high-reliability mixed-voltage interconnects requiring zero external components and deterministic direction control.
Availability
74LVCH2T45RA3-7 is available at Aetrix Electronics and suitable for mobile device integration, industrial control I/O expansion, automotive ADAS subsystems, and server thermal management requiring stable component supply and long-term lifecycle support.
Supply support for 74LVCH2T45RA3-7 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The 74LVCH2T45RA3-7 belongs to Diodes' LVC logic family, engineered for ultra-low-voltage translation and robust operation in portable, industrial, and automotive-qualified systems demanding high noise immunity and power-down safety.
FAQ
What is the maximum allowable voltage difference between VCC(A) and VCC(B)?
The 74LVCH2T45RA3-7 permits any combination within its 1.2V–5.5V range per rail - including VCC(A) = 1.2V and VCC(B) = 5.5V simultaneously. Absolute maximum ratings confirm no restriction on inter-rail differential; only individual supply limits apply (–0.5V to +6.5V).
Can the DIR pin be left unconnected or tied to a fixed voltage?
No - DIR must be actively driven HIGH or LOW. Floating DIR causes undefined port direction and potential bus contention. Diodes specifies VIH/VIL thresholds relative to VCC(A); for reliable operation, tie DIR to VCC(A) via 10kΩ resistor for A→B default, or to GND for B→A default.
Does the bus-hold feature affect timing or signal integrity?
Bus-hold adds ≤100μA DC loading and <1pF capacitance per I/O - negligible impact on propagation delay (<0.2ns shift) and compatible with 420Mbps operation. It does not degrade rise/fall times or introduce jitter, as confirmed by switching characteristics tables across all VCC combinations.
Is the X2-DFN1210-8 package thermally adequate for continuous 24mA output drive?
Yes - with proper PCB layout (2oz copper, minimum recommended pad), θJA is 295°C/W. At 24mA into 50Ω load with 3.3V VCC, worst-case power dissipation is ~18mW, resulting in <6°C junction rise above ambient - well within the +125°C TJ limit and derating guidelines.
74LVCH2T45RA3-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74LVCH
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 2
- Voltage - VCCA:
- 1.2 V ~ 5.5 V
- Voltage - VCCB:
- 1.2 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- 420Mbps
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-XFDFN
74LVCH2T45RA3-7 FAQ
1.How can I place an order for 74LVCH2T45RA3-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCH2T45RA3-7 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 74LVCH2T45RA3-7 reliable?
The price and inventory of 74LVCH2T45RA3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCH2T45RA3-7 is usually 5 days.
3.What payment methods are accepted for 74LVCH2T45RA3-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCH2T45RA3-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVCH2T45RA3-7?
74LVCH2T45RA3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCH2T45RA3-7 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 74LVCH2T45RA3-7?
For technical support, including 74LVCH2T45RA3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCH2T45RA3-7 requirements.
6.How does Aetrix verify that 74LVCH2T45RA3-7 is sourced from the original manufacturer or authorized distributors?
All 74LVCH2T45RA3-7 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 74LVCH2T45RA3-7 meets industry standards.
7.What is the process for return or replacement of 74LVCH2T45RA3-7?
All 74LVCH2T45RA3-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCH2T45RA3-7, 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 74LVCH2T45RA3-7 part is unused and in its original packaging.
Return procedure for 74LVCH2T45RA3-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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