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NXP Semiconductors 74LVCH1T45GF,132
- Part No.:
- 74LVCH1T45GF,132
- Manufacturer:
- NXP Semiconductors
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74LVCH1T45GF,132.pdf
- Description:
- NEXPERIA 74LVCH1T45GF - BUS TRAN
- Quantity:
- Payment:
- Shipping:
Inventory:215,321
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Product details
Overview
74LVCH1T45GF,132 from Nexperia is a single-bit dual-supply translating transceiver with 3-state outputs and active bus hold, enabling bidirectional level translation between 1.2 V and 5.5 V domains. It features independent VCC(A) and VCC(B) supplies, DIR-controlled direction, IOFF for partial power-down, and operates from –40 °C to +125 °C - used in mixed-voltage I²C, UART, and GPIO interfacing between SoC and peripheral ICs.
For engineers reviewing the 74LVCH1T45GF,132 datasheet, 74LVCH1T45GF,132 pinout, 74LVCH1T45GF,132 application, or 74LVCH1T45GF,132 equivalent, key selection criteria include voltage translation range (1.2–5.5 V), suspend-mode behavior during power loss, bus hold functionality for floating inputs, and maximum data rates up to 420 Mbps (3.3 V → 5.0 V).
Technical Context
The device implements a dual-rail CMOS transceiver architecture with separate input-referenced logic: A and DIR pins are referenced to VCC(A), while B is referenced to VCC(B). Direction control is synchronous and non-latched - DIR HIGH enables A→B transmission; DIR LOW enables B→A transmission.
Suspend mode activates when either VCC(A) or VCC(B) = GND, forcing both A and B ports into high-impedance OFF-state. The integrated bus hold circuit actively maintains valid logic levels on unused A/B inputs without external pull resistors, reducing board space and signal integrity risk in low-power embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC(A) Range | 1.2 V to 5.5 V - supports direct interface with 1.2 V FPGA I/O banks or 5 V legacy peripherals |
| VCC(B) Range | 1.2 V to 5.5 V - enables asymmetric translation (e.g., 1.8 V MCU ↔ 3.3 V sensor) |
| Max Data Rate | 420 Mbps (3.3 V → 5.0 V) - sufficient for high-speed SPI clock domains and fast GPIO toggling |
| IOFF Leakage | ±2 μA max at –40 °C to +125 °C - prevents backflow current during partial power-down in battery-backed systems |
| Bus Hold Current | ±19 μA typical at 1.2 V - eliminates need for external pull-up/down resistors on idle data lines |
| Propagation Delay | 5.1 ns (A→B, VCC(A)=3.3 V, VCC(B)=5.0 V) - ensures timing compliance in sub-10 ns critical paths |
| ESD Rating | HBM >4000 V, CDM >1000 V - meets industrial-grade robustness requirements for field-deployed equipment |
Pinout & Package
74LVCH1T45GF,132 is packaged in SOT886 (XSON6), a 1.0 × 1.45 × 0.5 mm leadless plastic package with 6 terminals and wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC(A) | Supply for port A and DIR input | Defines logic thresholds for A and DIR; must be stable before asserting DIR |
| GND | Reference ground | Common return path for both supply domains; requires low-inductance connection |
| A | Bidirectional data I/O (port A) | Connected to 1.2–5.5 V domain; features bus hold and IOFF protection |
| B | Bidirectional data I/O (port B) | Referenced to VCC(B); electrically isolated from A-side logic thresholds |
| DIR | Direction control input | Active-HIGH A→B, active-LOW B→A; sampled synchronously with data edges |
| VCC(B) | Supply for port B | Independent of VCC(A); enables true dual-voltage operation without level-shifter biasing |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply translation | Independent 1.2–5.5 V rails on A and B sides eliminate need for external voltage translators |
| IOFF partial power-down | Outputs disable safely when either VCC is removed - prevents back-driving in hot-swap or sleep-mode applications |
| Active bus hold | Eliminates external pull resistors on A/B lines - reduces BOM count and PCB area in space-constrained designs |
| Suspend mode | Both ports enter high-Z when VCC(A) = 0 V or VCC(B) = 0 V - essential for fail-safe behavior in multi-rail power sequencing |
| High noise immunity | Guaranteed VIH/VIL margins across all VCC combinations - improves reliability in noisy industrial environments |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing a 1.8 V automotive microcontroller to a 3.3 V CAN transceiver PHY layer. IC Role / Device Role / Timing Role: Bidirectional level translator for TXD/RXD signals with precise direction control synchronized to UART framing. Use Value: Eliminates discrete resistor-based translation, reduces EMI from floating nodes via bus hold, and ensures safe isolation during MCU reset sequences. | Use Scenario: Connecting a 5.0 V legacy door-lock actuator driver to a 3.3 V body control unit MCU. IC Role / Device Role / Timing Role: Voltage-level translator for GPIO-controlled enable/disable signals with IOFF protection during MCU sleep. Use Value: Prevents back-current flow into powered-down MCU I/O pins, avoids latch-up risk, and maintains signal integrity over temperature (–40 °C to +125 °C). |
| Wearable Health Monitor | Industrial PLC I/O Expansion |
Use Scenario: Bridging a 1.2 V ultra-low-power sensor hub ASIC to a 2.5 V Bluetooth LE radio module. IC Role / Device Role / Timing Role: Low-voltage bidirectional data path translator with sub-10 ns propagation delay for real-time sensor streaming. Use Value: Enables energy-efficient operation with 16 μA max ICC, bus hold prevents spurious wakeups from floating sensor lines. | Use Scenario: Isolating 3.3 V fieldbus controller logic from 24 V digital input conditioning circuitry via optocoupler interface. IC Role / Device Role / Timing Role: Level-shifting control signals between isolated 3.3 V logic and 5 V buffer stages in modular I/O cards. Use Value: Supports hot-plug insertion with suspend mode; IOFF prevents damage during live card replacement in operational PLC racks. |
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 |
|---|---|---|---|
| SN74LVC1T45DCKR | No bus hold; IOFF supported; same pinout; max 200 Mbps (3.3 V → 5 V) | Lacks active bus hold - requires external pull resistors on floating lines | Select when cost sensitivity outweighs board-area savings from bus hold |
| TXS0101DCKR | Auto-direction sensing (no DIR pin); lower drive strength (±2 mA); higher ICC (20 μA) | Eliminates direction control logic but adds timing uncertainty on bus turnaround | Select for simple unidirectional or low-speed bidirectional links where DIR routing is impractical |
Compared with SN74LVC1T45DCKR and TXS0101DCKR, the 74LVCH1T45GF,132 uniquely combines bus hold, 420 Mbps performance, and guaranteed suspend-mode behavior - making it optimal for high-reliability, mixed-voltage embedded systems requiring minimal external components and deterministic timing.
Availability
74LVCH1T45GF,132 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, wearable health monitors, and PLC I/O expansion requiring stable component supply across extended temperature ranges.
Supply support for 74LVCH1T45GF,132 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
Nexperia is a global semiconductor expert delivering high-performance, reliable, and efficient logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LVCH1T45 belongs to Nexperia's LVC/LVCH family of advanced logic devices designed specifically for low-voltage, mixed-rail system interfacing with emphasis on power efficiency, robustness, and ease of integration.
FAQ
What is the minimum recommended VCC differential between VCC(A) and VCC(B)?
No minimum differential is required: VCC(A) and VCC(B) may be equal (e.g., both 3.3 V) or differ by up to 4.3 V (e.g., 1.2 V and 5.5 V). The device guarantees correct operation across the full 1.2 V–5.5 V range for each supply independently, per JEDEC JESD8-7/8C/36 compliance.
Can the DIR pin be left unconnected in a fixed-direction application?
No - DIR must be actively driven HIGH or LOW. Floating DIR violates the absolute maximum rating for input voltage and may cause undefined output states. For fixed A→B operation, tie DIR to VCC(A) via a 10 kΩ resistor; for fixed B→A, tie to GND.
How does bus hold behave when VCC(A) = 0 V but VCC(B) is active?
Bus hold is disabled when VCC(A) = 0 V - only the A port enters high-impedance OFF-state per IOFF behavior. The B port remains functional if VCC(B) is valid and DIR is asserted appropriately, but A-side bus hold is inactive until VCC(A) is restored.
Is the 74LVCH1T45GF,132 compatible with 1.0 V logic systems?
No - the absolute minimum VCC(A) and VCC(B) are 1.2 V per datasheet Section 9. Operation below 1.2 V is not characterized, and input thresholds (VIH/VIL) are undefined. For 1.0 V systems, consider dedicated ultra-low-voltage translators such as the NTS0101.
74LVCH1T45GF,132 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVCH
- Package/Case:
- Packaging:
- Bulk
- Product Status:
- Active
- Translator Type:
- -
- Channel Type:
- -
- Number of Circuits:
- -
- Channels per Circuit:
- -
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- -
- Data Rate:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74LVCH1T45GF,132 FAQ
1.How can I place an order for 74LVCH1T45GF,132 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCH1T45GF,132 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 74LVCH1T45GF,132 reliable?
The price and inventory of 74LVCH1T45GF,132 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCH1T45GF,132 is usually 5 days.
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5.How can I obtain technical support or documentation for 74LVCH1T45GF,132?
For technical support, including 74LVCH1T45GF,132 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCH1T45GF,132 requirements.
6.How does Aetrix verify that 74LVCH1T45GF,132 is sourced from the original manufacturer or authorized distributors?
All 74LVCH1T45GF,132 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 74LVCH1T45GF,132 meets industry standards.
7.What is the process for return or replacement of 74LVCH1T45GF,132?
All 74LVCH1T45GF,132 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCH1T45GF,132, 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 74LVCH1T45GF,132 part is unused and in its original packaging.
Return procedure for 74LVCH1T45GF,132:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVCH1T45GF,132 Tags
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SN74LVC2T45DCTR
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TXS0102DCTR
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