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NXP Semiconductors 74LVCH1T45GM,115
- Part No.:
- 74LVCH1T45GM,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74LVCH1T45GM,115.pdf
- Description:
- NEXPERIA 74LVCH1T45GM - BUS TRAN
- Quantity:
- Payment:
- Shipping:
Inventory:50,273
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Product details
Overview
74LVCH1T45GM,115 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 (e.g., 1.8 V MCU I/O to 3.3 V peripheral). It features independent VCC(A) and VCC(B) supplies, DIR-controlled direction, IOFF power-down protection, and operates from –40 °C to +125 °C in the XSON6 (SOT886) package.
For engineers reviewing the 74LVCH1T45GM,115 datasheet, 74LVCH1T45GM,115 pinout, 74LVCH1T45GM,115 application, or 74LVCH1T45GM,115 equivalent, key selection criteria include dual-voltage domain compatibility, suspend-mode behavior during partial power-down, bus hold functionality for floating inputs, and propagation delay performance across voltage combinations (e.g., 5.3 ns A→B at 3.3 V).
Technical Context
This device implements a bidirectional data path controlled by a single DIR input referenced to VCC(A), where HIGH enables A→B transmission and LOW enables B→A. Both ports support independent supply rails, and internal IOFF circuitry disables outputs and blocks backflow current when either VCC(A) or VCC(B) is at GND-enabling safe partial power-down in mixed-voltage systems.
The 74LVCH1T45GM includes active bus hold on A and B ports, eliminating external pull resistors for unused inputs. Its logic-level thresholds scale with respective supply voltages (e.g., VIH = 0.65×VCC(A) for 1.4–1.95 V operation), and it complies with JEDEC standards JESD8-7, JESD8-5, JESD8C, and JESD36 for interoperability across voltage families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC(A) Range | 1.2 V to 5.5 V - supports interface between ultra-low-voltage cores (1.2 V) and legacy 5 V peripherals |
| VCC(B) Range | 1.2 V to 5.5 V - fully symmetric dual-rail operation, no master/slave dependency |
| Max Data Rate | 420 Mbps (3.3 V → 5.0 V) - enables high-speed inter-domain communication in compact embedded interfaces |
| tPLH / tPHL | 5.3 ns / 5.2 ns (A→B, VCC(A)=3.3 V, VCC(B)=3.3 V) - ensures timing margin in 100+ MHz digital buses |
| IOFF Leakage | ±2 μA max (–40 °C to +125 °C) - prevents damaging back-current during system sleep or hot-swap events |
| Bus Hold Current | ±100 μA (VI = 0.91 V / 3.15 V, VCCI = 3.0 V / 4.5 V) - actively maintains valid logic state on unterminated or floating I/O lines |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive, industrial control, and high-reliability edge computing |
Pinout & Package
XSON6 plastic extremely thin small outline package (SOT886), 1.0 × 1.45 × 0.5 mm body, no leads, 6 terminals, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC(A) | Supply for port A and DIR input - defines logic thresholds and drive strength for A-side signals |
| 2 | GND | Common reference for both domains - required for noise immunity and IOFF activation |
| 3 | A | Bidirectional data terminal referenced to VCC(A) - connects to low-voltage processor I/O or sensor interface |
| 4 | B | Bidirectional data terminal referenced to VCC(B) - interfaces with higher-voltage peripheral or FPGA bank |
| 5 | DIR | Direction control input (active-HIGH A→B) - referenced to VCC(A); must be driven before data transfer |
| 6 | VCC(B) | Supply for port B - sets output voltage swing and input threshold for B-side signals |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply rails | VCC(A) and VCC(B) each configurable from 1.2 V to 5.5 V - eliminates need for external level shifters in heterogeneous SoC designs |
| IOFF partial power-down | Outputs go high-impedance and leakage ≤ ±2 μA when either VCC is at GND - enables safe integration into battery-backed or modular power systems |
| Active bus hold | Internal weak pull-up/pull-down on A/B ports - removes requirement for external biasing on unused pins in space-constrained PCB layouts |
| Suspend mode | Both A and B ports enter high-Z when VCC(A) = GND or VCC(B) = GND - guarantees isolation during firmware-initiated power gating |
| ESD robustness | HBM > 4000 V, CDM > 1000 V - meets industrial handling requirements without additional protection circuitry |
Applications
| Industrial PLC I/O Module | Automotive ADAS Sensor Hub |
|---|---|
Use Scenario: Interfacing a 1.8 V microcontroller to 3.3 V analog-to-digital converter and CAN transceiver in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: Bidirectional level translator managing data flow between voltage domains while maintaining signal integrity during hot-plug events. Use Value: Eliminates discrete resistor networks and reduces BOM count; IOFF prevents backfeed into powered-down MCU sections during maintenance mode. | Use Scenario: Connecting a 1.2 V vision processor to 2.5 V image signal processor and 5.0 V power management IC in a surround-view camera ECU. IC Role / Device Role / Timing Role: Voltage-domain bridge enabling real-time pixel data transfer with sub-6 ns propagation delay and thermal stability up to +125 °C. Use Value: Bus hold maintains valid logic states on unconnected sensor lanes during calibration; suspend mode isolates domains during sleep/wake transitions. |
| Medical Wearable Data Logger | 5G Small Cell Baseband Interface |
Use Scenario: Linking a 1.5 V ultra-low-power ARM Cortex-M0+ to 3.3 V SD card and Bluetooth LE radio in a battery-operated patient monitor. IC Role / Device Role / Timing Role: Low-leakage bidirectional translator supporting dynamic voltage scaling and deep-sleep wake-up via DIR-controlled direction reversal. Use Value: ICC ≤ 16 μA at 1.5 V enables multi-week battery life; IOFF ensures zero current draw from SD card when MCU is powered off. | Use Scenario: Level-shifting between a 2.5 V FPGA fabric and 5.0 V RF front-end ASIC in millimeter-wave beamforming hardware. IC Role / Device Role / Timing Role: High-speed domain translator operating at 420 Mbps with matched rise/fall times to preserve signal eye diagram integrity. Use Value: Propagation skew < 0.5 ns between A→B and B→A paths minimizes timing jitter in time-sensitive baseband sampling clocks. |
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 |
|---|---|---|---|
| SN74AVC1T45DBVR | TI part with identical pinout and function but lower max VCC (3.6 V), no bus hold, and wider temp range (–40 °C to +125 °C) | Lacks bus hold; requires external pull resistors on floating lines; rated only to 3.6 V on both rails | Select when bus hold is unnecessary and supply rails are capped at 3.6 V; verify IOFF behavior matches system power sequencing. |
| TXS0101DCKR | TI auto-direction sensing device (no DIR pin); supports 1.2 V to 3.6 V only; higher ICC (30 μA typical); no suspend mode | Eliminates DIR control but adds internal direction detection latency; unsuitable for synchronous bidirectional protocols like SPI half-duplex | Choose only for simple GPIO expansion where direction changes infrequently and VCC(B) ≤ 3.6 V; avoid in timing-critical or 5 V–compatible designs. |
Compared with SN74AVC1T45DBVR and TXS0101DCKR, the 74LVCH1T45GM,115 uniquely combines full 1.2–5.5 V dual-rail support, integrated bus hold, and guaranteed suspend-mode isolation-making it the only option qualified for mixed-voltage automotive and industrial applications requiring zero external biasing and 5 V interoperability.
Availability
74LVCH1T45GM,115 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive ADAS sensor hubs, medical wearable data loggers, and 5G small cell baseband interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74LVCH1T45GM,115 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 components for automotive, industrial, mobile, and computing markets, with leadership in logic, MOSFETs, diodes, and ESD protection.
The 74LVCH1T45GM,115 belongs to Nexperia's LVC/LVCH logic family, engineered specifically for robust, low-power bidirectional level translation in space-constrained, mixed-voltage embedded systems demanding wide supply flexibility and fail-safe power-down behavior.
FAQ
What is the maximum allowable voltage difference between VCC(A) and VCC(B)?
The datasheet does not specify a maximum differential voltage limit. Both supplies operate independently within 1.2 V to 5.5 V, and the device is designed to translate between any combination in that range-including 1.2 V ↔ 5.5 V. Absolute maximum ratings allow VCC(A) and VCC(B) to reach +6.5 V individually, but functional operation is guaranteed only within the recommended 1.2–5.5 V range for each rail.
Does the 74LVCH1T45GM,115 require external pull-up or pull-down resistors on the A or B ports?
No. The 74LVCH1T45GM,115 integrates active bus hold circuitry on both A and B ports, which sources or sinks up to ±100 μA to maintain valid logic levels on floating inputs. This eliminates the need for external biasing resistors in most applications, reducing PCB area and BOM cost.
How does the IOFF feature behave when only VCC(A) is powered and VCC(B) is grounded?
When VCC(B) = GND, the B port enters high-impedance OFF-state and IOFF limits leakage current to ≤ ±2 μA (–40 °C to +125 °C). The A port remains functional if VCC(A) is active, but its output is disabled when driving toward the grounded B rail-preventing destructive back-current flow through the device.
Can the DIR pin be left unconnected or tied to a fixed voltage?
No. DIR must be actively driven-either HIGH (for A→B) or LOW (for B→A)-by a signal referenced to VCC(A). Leaving DIR floating violates the input voltage specification and may cause undefined direction behavior or increased ICC. A pull-up or pull-down resistor to VCC(A) or GND is acceptable only if the direction is static and the resistor value ensures VIH/VIL thresholds are met across temperature and voltage.
74LVCH1T45GM,115 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:
- -
74LVCH1T45GM,115 FAQ
1.How can I place an order for 74LVCH1T45GM,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCH1T45GM,115 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 74LVCH1T45GM,115 reliable?
The price and inventory of 74LVCH1T45GM,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCH1T45GM,115 is usually 5 days.
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Once your 74LVCH1T45GM,115 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 74LVCH1T45GM,115?
For technical support, including 74LVCH1T45GM,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCH1T45GM,115 requirements.
6.How does Aetrix verify that 74LVCH1T45GM,115 is sourced from the original manufacturer or authorized distributors?
All 74LVCH1T45GM,115 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 74LVCH1T45GM,115 meets industry standards.
7.What is the process for return or replacement of 74LVCH1T45GM,115?
All 74LVCH1T45GM,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCH1T45GM,115, 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 74LVCH1T45GM,115 part is unused and in its original packaging.
Return procedure for 74LVCH1T45GM,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVCH1T45GM,115 Tags
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74LVC1T45GW,125
Nexperia USA Inc.
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74LVCH2T45DC,125
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SN74LVC1T45DBVR
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SN74LVC1T45DPKR
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SN74LVC2T45DCTR
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74LVC2T45GT,115
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SN74LVC1T45YZPR
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LSF0102DCUR
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SN74LVC1T45DCKR
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TXS0102DCTR
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