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Nexperia USA Inc. 74LVC8T245BQ-Q100J
- Part No.:
- 74LVC8T245BQ-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
74LVC8T245BQ-Q100J.pdf
- Description:
- IC TRANSLATR TXRX 5.5V 24DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:838
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Product details
Overview
74LVC8T245BQ-Q100 from Nexperia is an automotive-grade 8-bit dual-supply translating transceiver with 3-state outputs, enabling bidirectional level translation between 1.2 V and 5.5 V domains. It features independent VCC(A) and VCC(B) supplies, DIR-controlled data direction, OE-enabled bus isolation, and IOFF circuitry for partial power-down protection. Used in automotive infotainment backplanes interfacing 1.8 V microcontrollers with 3.3 V display drivers.
For engineers reviewing the 74LVC8T245BQ-Q100 datasheet, 74LVC8T245BQ-Q100 pinout, 74LVC8T245BQ-Q100 application, or 74LVC8T245BQ-Q100 equivalent, this device supports high-speed bidirectional voltage translation across mixed-voltage automotive subsystems while maintaining AEC-Q100 Grade 1 qualification, suspend-mode isolation, and ±24 mA drive strength at 3.0 V.
Technical Context
The device implements a dual-rail CMOS transceiver architecture with separate input-reference domains: An, DIR, and OE pins referenced to VCC(A); Bn pins referenced to VCC(B). Direction control is synchronous and edge-independent - DIR HIGH enables A→B transmission, DIR LOW enables B→A transmission.
IOFF circuitry actively disables outputs when either VCC(A) or VCC(B) is at GND, preventing backflow current and ensuring high-impedance OFF-state on both ports during suspend mode. Bus hold circuitry (in LVCH variant) is not present in 74LVC8T245-Q100 per datasheet Table 7 footnote [4], confirming this is the non-bus-hold version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply range VCC(A) | 1.2 V to 5.5 V - supports direct interface with 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V logic domains |
| Supply range VCC(B) | 1.2 V to 5.5 V - independent rail allows asymmetric translation (e.g., 1.8 V ↔ 3.3 V) |
| Max data rate | 420 Mbps - achievable when translating from 3.3 V to 5.0 V, enabling high-throughput inter-ECU communication |
| Propagation delay (A→B) | 5.4 ns typical at VCC(A)=3.3 V, VCC(B)=5.0 V - ensures sub-6 ns timing margin for 100+ MHz buses |
| IOFF leakage | ±2 μA max at -40 °C to +125 °C - guarantees safe hot-swap and power sequencing in multi-rail automotive modules |
| Output drive | ±24 mA at VCC=3.0 V - drives 50 Ω transmission lines or multiple CMOS loads without external buffers |
| Ambient temperature | -40 °C to +125 °C - qualified for under-hood and ADAS domain controller environments |
Pinout & Package
DHVQFN24 package (SOT815-1), 3.5 × 5.5 × 0.85 mm body, side-wettable flanks for AOI-compatible solder joint inspection. Exposed thermal pad (non-electrical, optional GND connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11–13, 24 | GND | Ground reference for both supply domains; all must be connected to system 0 V plane |
| 2 | DIR | Direction control input referenced to VCC(A); HIGH = A→B, LOW = B→A |
| 3–10 | A1–A8 | Port A bidirectional I/Os referenced to VCC(A); connect to low-voltage MCU or sensor interface |
| 14–21 | B1–B8 | Port B bidirectional I/Os referenced to VCC(B); connect to higher-voltage peripheral or display interface |
| 22 | OE | Active-LOW output enable; asserts high-impedance state on both ports when HIGH |
| 1, 23 | VCC(A) | Supply for Port A, DIR, and OE inputs; sets logic thresholds for A-side signals |
| 23, 24 | VCC(B) | Supply for Port B; defines output swing and input thresholds for B-side signals |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply translation | Independent 1.2 V–5.5 V rails on A and B ports eliminate need for external level shifters in mixed-voltage designs |
| IOFF partial power-down | Prevents damaging back-current when one supply is off - critical for ECU power domain sequencing and fail-safe operation |
| AEC-Q100 Grade 1 | Qualified for automotive use from -40 °C to +125 °C ambient, meeting stringent reliability and lifetime requirements |
| 3-state bus isolation | OE-controlled high-impedance outputs allow shared bus arbitration and prevent signal contention in multi-master systems |
| High noise immunity | Meets JEDEC standards JESD8-7, JESD8-5, JESD8C, JESD36 - robust against coupled transients in vehicle E/E architectures |
Applications
| ADAS Camera Interface | Body Control Module Backplane |
|---|---|
|
Use Scenario: Interfacing a 1.8 V MIPI CSI-2 image processor with a 3.3 V serializer IC in a surround-view camera system. IC Role / Device Role / Timing Role: Bidirectional level translator synchronizing pixel clock and data lanes between voltage domains. Use Value: Enables direct connection without discrete resistive translators, reducing BOM count and preserving signal integrity up to 420 Mbps. |
Use Scenario: Connecting a 3.3 V body controller MCU to legacy 5.0 V LIN transceivers and door module sensors. IC Role / Device Role / Timing Role: Voltage-domain bridge managing bidirectional UART and GPIO signals across mixed-supply subsystems. Use Value: Eliminates need for separate unidirectional translators per signal, simplifying layout and supporting hot-plug diagnostics. |
| Infotainment Display Link | Powertrain Gateway Isolation |
|
Use Scenario: Translating parallel RGB interface signals between a 1.2 V application processor and a 2.5 V display timing controller. IC Role / Device Role / Timing Role: 8-bit parallel translator handling sync, data, and control lines with matched propagation delay. Use Value: Maintains skew <1 ns across all 8 bits (per Fig. 6–8), preserving pixel alignment and eliminating display artifacts. |
Use Scenario: Isolating CAN FD gateway MCU (3.3 V I/O) from 5.0 V power management ICs during sleep/wake transitions. IC Role / Device Role / Timing Role: Suspend-mode translator that enters high-Z on both ports when either VCC drops to GND. Use Value: Prevents backfeed into powered-down domains during key-off states, satisfying ISO 16750-2 load-dump and sleep-current specs. |
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 |
|---|---|---|---|
| 74LVCH8T245BQ-Q100 | Includes active bus hold circuitry on all I/Os; otherwise identical pinout, specs, and qualification | Eliminates need for external pull-ups on floating A/B port inputs - beneficial in low-power wake-on-event designs | Select when unused inputs may float during sleep; avoid if bus hold current adds unacceptable static load |
| SN74AVC8T245RHLR | Texas Instruments part; same 8-bit dual-rail function but rated only to +85 °C (not AEC-Q100) | Lacks automotive qualification and suspend-mode IOFF behavior - unsuitable for under-hood or safety-critical domains | Acceptable for industrial or consumer applications requiring 1.2 V–3.6 V translation without automotive compliance |
Compared with 74LVCH8T245BQ-Q100, the base 74LVC8T245BQ-Q100 reduces static current by omitting bus hold, while SN74AVC8T245RHLR trades automotive reliability for broader commercial availability - making the original optimal for cost-sensitive, thermally demanding automotive nodes where IOFF and Grade 1 are mandatory.
Availability
74LVC8T245BQ-Q100 is available at Aetrix Electronics and suitable for automotive ADAS camera interfaces, body control module backplanes, infotainment display links, and powertrain gateway isolation requiring stable component supply across extended temperature ranges.
Supply support for 74LVC8T245BQ-Q100 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 leading semiconductor manufacturer specializing in high-performance logic, analog, and MOSFET solutions, with deep expertise in automotive-qualified components and advanced packaging.
This device belongs to Nexperia's automotive logic portfolio, designed specifically for voltage translation in AEC-Q100-compliant ECUs where mixed-supply interoperability, IOFF safety, and extended temperature operation are essential.
FAQ
What is the maximum allowable voltage difference between VCC(A) and VCC(B)?
The datasheet specifies independent operating ranges: VCC(A) and VCC(B) each support 1.2 V to 5.5 V with no restriction on differential voltage. Absolute maximum ratings permit VCC(A) = –0.5 V to +6.5 V and VCC(B) = –0.5 V to +6.5 V, meaning up to 6.0 V difference is electrically permissible. However, functional translation requires both supplies to be within their recommended 1.2 V–5.5 V range.
Does 74LVC8T245BQ-Q100 support hot insertion?
Yes - its IOFF circuitry ensures outputs enter high-impedance state when either VCC(A) or VCC(B) is at GND, preventing back-current flow during live board insertion. This behavior is explicitly validated in suspend mode (Table 3, footnote [1]) and meets automotive hot-swap requirements per ISO 16750-2.
Can DIR and OE be driven from different voltage domains?
No - DIR and OE inputs are referenced solely to VCC(A), as stated in Section 5.2 and functional description. Driving them from VCC(B) or another rail violates input voltage limits and risks latch-up. They must be controlled by logic operating at VCC(A) voltage levels, with VIH/VIL thresholds scaling accordingly (e.g., VIH = 0.65×VCC(A) at 1.4–1.95 V).
Is the exposed thermal pad electrically connected?
No - per datasheet Section 5.1, the thermal pad (terminal 1 index area) has no electrical or mechanical requirement to be soldered. If soldered, it must remain floating or be connected to GND; it is not internally tied to any supply or signal net. Its sole purpose is thermal conduction to the PCB ground plane.
74LVC8T245BQ-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVC
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-DHVQFN (5.5x3.5)
74LVC8T245BQ-Q100J FAQ
1.How can I place an order for 74LVC8T245BQ-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC8T245BQ-Q100J 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 74LVC8T245BQ-Q100J reliable?
The price and inventory of 74LVC8T245BQ-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC8T245BQ-Q100J is usually 5 days.
3.What payment methods are accepted for 74LVC8T245BQ-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC8T245BQ-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC8T245BQ-Q100J?
74LVC8T245BQ-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC8T245BQ-Q100J 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 74LVC8T245BQ-Q100J?
For technical support, including 74LVC8T245BQ-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC8T245BQ-Q100J requirements.
6.How does Aetrix verify that 74LVC8T245BQ-Q100J is sourced from the original manufacturer or authorized distributors?
All 74LVC8T245BQ-Q100J 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 74LVC8T245BQ-Q100J meets industry standards.
7.What is the process for return or replacement of 74LVC8T245BQ-Q100J?
All 74LVC8T245BQ-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC8T245BQ-Q100J, 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 74LVC8T245BQ-Q100J part is unused and in its original packaging.
Return procedure for 74LVC8T245BQ-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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