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Nexperia USA Inc. 74AVC20T245BX,518
- Part No.:
- 74AVC20T245BX,518
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 60-XFQFN Dual Rows, Exposed Pad
- Datasheet:
-
74AVC20T245BX,518.pdf
- Description:
- IC TRANSLATOR BIDIR 60HXQFNU
- Quantity:
- Payment:
- Shipping:
Inventory:4,967
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Product details
Overview
74AVC20T245BX,518 from Nexperia is a 20-bit dual-supply translating transceiver enabling bidirectional voltage level translation between independent 0.8 V–3.6 V domains. It supports two 10-bit or one 20-bit configuration, features four I/O ports (1An/1Bn/2An/2Bn), dual output enables (1OE/2OE), dual direction controls (1DIR/2DIR), and IOFF partial power-down protection. Used in mixed-voltage SoC interconnects, FPGA-to-ASIC bridges, and DDR memory subsystems requiring clean signal integrity across voltage islands.
For engineers reviewing the 74AVC20T245BX,518 datasheet, 74AVC20T245BX,518 pinout, 74AVC20T245BX,518 application, or 74AVC20T245BX,518 equivalent, key selection criteria include bidirectional translation range (0.8 V ↔ 3.3 V), maximum data rate (380 Mbit/s at ≥1.8 V → 3.3 V), IOFF-enabled suspend mode, JEDEC-compliant low-voltage operation, and TSSOP56 thermal performance under industrial temperature (-40 °C to +125 °C).
Technical Context
This device implements a dual-rail CMOS transceiver architecture with separate VCC(A) and VCC(B) supplies referenced to distinct logic domains. Each 10-bit port pair (1A/1B and 2A/2B) operates independently under its own nDIR/nOE control, allowing asymmetric voltage translation in either direction based on DIR state and OE assertion.
IOFF circuitry actively disables outputs when either supply drops to GND, preventing backflow current and ensuring high-impedance OFF-state during partial power-down. Input clamping and ESD protection (HBM >8 kV, CDM >1 kV) are integrated, and propagation delay varies predictably with supply pairing-e.g., 5.9 ns (1An→1Bn) at VCC(A)=1.8 V / VCC(B)=2.5 V, and 11.8 ns (1Bn→1An) under same conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | VCC(A): 0.8 V–3.6 V; VCC(B): 0.8 V–3.6 V - enables translation between any two low-voltage nodes (e.g., 1.2 V ↔ 1.8 V, 1.8 V ↔ 3.3 V) |
| Max Data Rate | 380 Mbit/s - achievable only for ≥1.8 V → 3.3 V translation; lower rates apply for sub-1.8 V domains (e.g., 120 Mbit/s for 1.1 V → 1.5 V) |
| Propagation Delay | 5.9 ns (A→B) / 11.8 ns (B→A) at VCC(A)=1.8 V, VCC(B)=2.5 V - asymmetry arises from rail-dependent drive strength |
| IOFF Leakage | ±1 μA max at VCC = 0 V - ensures safe isolation during system suspend without external pull-ups or sequencing constraints |
| Operating Temp | -40 °C to +125 °C - qualified for automotive infotainment and industrial control applications with extended thermal margin |
| ESD Rating | HBM >8000 V, CDM >1000 V - exceeds JEDEC JS-001/JS-002 Class 3B/C3, reducing board-level protection component count |
| Input Voltage | Accepts up to 3.6 V regardless of VCC - allows hot-plug tolerant interfacing with legacy 3.3 V peripherals into newer low-VDD systems |
Pinout & Package
TSSOP56 package (SOT364-1), 6.1 mm body width, 0.5 mm pitch, 56-pin plastic thin shrink small outline package optimized for thermal dissipation and PCB space efficiency in high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Active-HIGH enables A→B data flow; LOW enables B→A - referenced to VCC(A), defines real-time path direction per port pair |
| 1OE, 2OE | Output enable input | Active-LOW disables both A and B sides of respective 10-bit port - forces high-impedance state independent of DIR or supply status |
| 1A1–1A10, 2A1–2A10 | Data I/O (side A) | Referenced to VCC(A); bidirectional ports supporting simultaneous read/write when paired with corresponding B-side |
| 1B1–1B10, 2B1–2B10 | Data I/O (side B) | Referenced to VCC(B); electrically isolated from side A except through transceiver core - enables true domain separation |
| VCC(A), VCC(B) | Independent power supplies | VCC(A) powers A-side I/O, DIR, OE; VCC(B) powers B-side I/O - no internal regulator; each must be stable within 0.8–3.6 V |
| GND (pins 4,11,18,25,32,39,46,53) | Ground reference | All eight GND pins must be connected to common system ground - critical for noise immunity and IOFF functionality |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail translation | Supports independent 0.8 V–3.6 V supplies on A/B sides - eliminates need for discrete level shifters in multi-voltage SoC designs |
| Configurable 10-/20-bit mode | Two independent 10-bit transceivers (1A/1B + 2A/2B) or unified 20-bit bus - increases layout flexibility without redesign |
| IOFF partial power-down | Outputs enter high-Z when either VCC drops to GND - prevents back-current damage during staggered power sequencing |
| Suspend mode | Automatic high-impedance on all ports if VCC(A) = GND or VCC(B) = GND - simplifies firmware power management |
| JEDEC compliance | Meets JESD8-12 through JESD8-B standards - guarantees interoperability with industry-standard low-voltage logic families |
Applications
| DDR Memory Interface | FPGA-to-MCU Bridge |
|---|---|
|
Use Scenario: Interfacing DDR3L SDRAM (1.35 V I/O) with a 1.8 V application processor memory controller. IC Role / Device Role / Timing Role: Bidirectional voltage translator placed between processor DQ/DQS lines and DRAM data bus, synchronizing timing-critical strobes while shifting levels. Use Value: Enables direct connection without external resistive dividers or active translators, preserving signal integrity and meeting tAC/tDQSS timing budgets. |
Use Scenario: Connecting a Xilinx Artix-7 FPGA (1.8 V bank) to an NXP i.MX RT1064 MCU (3.3 V GPIOs) for configuration and debug communication. IC Role / Device Role / Timing Role: Configurable 10-bit transceiver handling UART, SPI, and GPIO signals with independent direction control per channel. Use Value: Eliminates need for multiple discrete translators; single device handles mixed protocols and avoids timing skew across voltage domains. |
| Automotive Infotainment Hub | Industrial Sensor Aggregation |
|
Use Scenario: Aggregating CAN FD, LVDS display, and 1.2 V MIPI CSI-2 camera signals into a central ADAS processor operating at 1.5 V core I/O. IC Role / Device Role / Timing Role: Dual-port translator isolating 3.3 V CAN transceivers and 1.8 V display drivers from 1.5 V processor bus, with OE-controlled arbitration. Use Value: Reduces BOM count by consolidating three voltage domains into one IC; IOFF ensures safe hot-swap during module replacement. |
Use Scenario: Interfacing multiple 3.3 V industrial sensors (RS-485, analog front-ends) to a 1.2 V microcontroller ADC and digital I/O subsystem. IC Role / Device Role / Timing Role: 20-bit translator operating as two synchronized 10-bit channels - one for sensor data, one for control/status lines. Use Value: Maintains noise immunity via rail-isolated I/O; wide temp range (-40 °C to +125 °C) ensures reliability in uncooled enclosures. |
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 |
|---|---|---|---|
| SN74AVC20T245RHLR | TQFP-56 package (6 × 6 mm), higher thermal resistance (θJA = 46.5 °C/W vs. TSSOP56's 62.3 °C/W), identical electrical specs | Better suited for reflow-compatible high-volume PCB assembly; less suitable for space-constrained layouts where TSSOP56's 6.1 mm width matters | Select when board real estate permits larger footprint and thermal design favors lower θJA over package height. |
| 74LVC20T245PW,118 | Single-supply (1.65 V–3.6 V), no VCC(B) independence; lacks IOFF and suspend mode; max rate 200 Mbit/s | Only supports uni-directional translation between same-rail domains; cannot replace in mixed-voltage or partial-power-down use cases | Consider only for cost-sensitive, single-rail applications where voltage matching is guaranteed and power sequencing is trivial. |
Compared with SN74AVC20T245RHLR, the 74AVC20T245BX,518 offers superior board-area efficiency and higher thermal resistance tolerance in compact designs; versus 74LVC20T245PW,118, it delivers essential dual-rail flexibility, IOFF safety, and 90% higher bandwidth - making it irreplaceable in modern heterogeneous voltage architectures.
Availability
74AVC20T245BX,518 is available at Aetrix Electronics and suitable for DDR memory interfaces, FPGA-to-MCU bridges, and automotive infotainment hubs requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for 74AVC20T245BX,518 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 components for automotive, industrial, and consumer electronics markets.
The 74AVC20T245 belongs to Nexperia's Advanced Very-low-voltage CMOS (AVC) logic family, engineered specifically for ultra-low-voltage bidirectional translation in next-generation power-efficient systems.
FAQ
What is the minimum valid supply voltage pairing for functional operation?
The device operates with any combination of VCC(A) and VCC(B) between 0.8 V and 3.6 V, inclusive. Valid pairs include 0.8 V/1.2 V, 1.5 V/3.3 V, and 2.5 V/1.8 V. Operation is guaranteed down to 0.8 V on both rails per JEDEC JESD8-12, with full timing compliance verified at -40 °C to +125 °C.
Can 74AVC20T245BX,518 translate between 3.3 V and 5 V domains?
No. Absolute maximum VCC rating is +4.6 V, but inputs are only rated to accept up to 3.6 V regardless of supply. Direct 5 V interface risks permanent damage. For 3.3 V ↔ 5 V translation, a dedicated 5 V-tolerant transceiver such as 74LVC4245A is required.
How does IOFF behave when only VCC(A) is powered?
When VCC(A) is active and VCC(B) = GND, the B-side I/Os enter high-impedance OFF-state via IOFF, while A-side I/Os remain functional. This prevents back-current from B-side traces into the unpowered VCC(B) rail - a critical feature for staggered power-up sequences in modular systems.
Is the 74AVC20T245BX,518 pin-compatible with older 74AVC16T245 variants?
No. The 74AVC20T245 uses a 56-pin TSSOP (SOT364-1), whereas the 74AVC16T245 uses a 48-pin TSSOP (SOT362-1). Pin count, spacing, and I/O mapping differ - including additional DIR/OE pairs and doubled I/O count - requiring PCB redesign for migration.
74AVC20T245BX,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AVC
- Package/Case:
- 60-XFQFN Dual Rows, Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 2
- Number of Bits per Element:
- 10
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 0.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 60-HXQFNU (4x6)
74AVC20T245BX,518 FAQ
1.How can I place an order for 74AVC20T245BX,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVC20T245BX,518 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 74AVC20T245BX,518 reliable?
The price and inventory of 74AVC20T245BX,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVC20T245BX,518 is usually 5 days.
3.What payment methods are accepted for 74AVC20T245BX,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVC20T245BX,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AVC20T245BX,518?
74AVC20T245BX,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVC20T245BX,518 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 74AVC20T245BX,518?
For technical support, including 74AVC20T245BX,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVC20T245BX,518 requirements.
6.How does Aetrix verify that 74AVC20T245BX,518 is sourced from the original manufacturer or authorized distributors?
All 74AVC20T245BX,518 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 74AVC20T245BX,518 meets industry standards.
7.What is the process for return or replacement of 74AVC20T245BX,518?
All 74AVC20T245BX,518 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVC20T245BX,518, 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 74AVC20T245BX,518 part is unused and in its original packaging.
Return procedure for 74AVC20T245BX,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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