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NXP Semiconductors PCA9306GD1,125
- Part No.:
- PCA9306GD1,125
- Manufacturer:
- NXP Semiconductors
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PCA9306GD1,125.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8XSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,519
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Product details
Overview
PCA9306GD1,125 from NXP Semiconductors is a dual bidirectional I²C-bus and SMBus voltage-level translator with enable control, supporting 1.0 V–3.6 V (VREF1) and 1.8 V–5.5 V (VREF2) operation, <3.5 Ω ON-state resistance, <2.0 ns propagation delay, and 8-terminal XSON8U package. It enables seamless interconnection between mixed-voltage I²C subsystems in embedded controllers and sensor hubs.
For engineers reviewing the PCA9306GD1,125 datasheet, PCA9306GD1,125 pinout, PCA9306GD1,125 application, or PCA9306GD1,125 equivalent, key selection criteria include bidirectional translation without direction pin, EN-controlled isolation, open-drain I/O compatibility, and support for Standard/Fast/Fast-Plus I²C modes up to >2 MHz under optimized RC conditions.
Technical Context
The PCA9306GD1,125 implements a MOSFET-based bidirectional clamping architecture where SDA1/SCL1 connect to VREF1 (low-voltage side) and SDA2/SCL2 connect to VREF2 (high-voltage side), with EN referenced to VREF2. Translation occurs via low-Ron pass switches that automatically adapt direction based on relative voltage levels at each port.
It operates only as a level shifter-not a bus buffer-so capacitance isolation is active only when EN = LOW; during translation (EN = HIGH), both sides remain electrically coupled. The device requires pull-up resistors on both sides and supports mixed-mode operation with 5 V-tolerant I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF1 Range | 1.0 V to 3.6 V - sets maximum output voltage on SCL1/SDA1 side; must be ≥1 V lower than VREF2 for reliable operation |
| VREF2 Range | 1.8 V to 5.5 V - supplies high-side reference and EN bias; enables 5 V-tolerant I/O on SCL2/SDA2 |
| ON-State Resistance | 2.4 Ω (typ) at VI(EN) = 4.5 V - ensures minimal signal distortion and <2 ns propagation delay across I²C lines |
| Propagation Delay | <2.0 ns (max) - supports Fast-mode Plus (1 MHz) and higher frequencies when CL ≤ 30 pF and RPU optimized |
| I²C Compatibility | Standard-mode (100 kHz), Fast-mode (400 kHz), Fast-mode Plus (1 MHz), SMBus - no protocol modification required |
| ESD Protection | 2000 V HBM, 1000 V CDM - protects low-voltage peripherals from ESD coupling through shared I²C bus |
| Operating Temperature | −40 °C to +105 °C - qualified for industrial and automotive-adjacent embedded applications |
Pinout & Package
XSON8U package: plastic extremely thin small outline, no leads, 3 mm × 2 mm × 0.5 mm body, UTLP-based, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Common return path for both voltage domains; must be low-impedance connection to system ground plane |
| 2 VREF1 | Low-voltage supply reference | Sets logic HIGH level for SCL1/SDA1; connects to core voltage rail (e.g., 1.8 V MCU IO) |
| 3 SCL1 | Low-voltage serial clock | Open-drain I²C clock line on VREF1 side; requires external pull-up to VREF1 |
| 4 SDA1 | Low-voltage serial data | Open-drain I²C data line on VREF1 side; requires external pull-up to VREF1 |
| 5 EN | Enable input | Active-HIGH control referenced to VREF2; must be ≥1 V above VREF1 for stable switching |
| 6 VREF2 | High-voltage supply reference | Sets logic HIGH level for SCL2/SDA2; powers EN and defines upper voltage domain (e.g., 3.3 V or 5 V) |
| 7 SCL2 | High-voltage serial clock | Open-drain I²C clock line on VREF2 side; requires external pull-up to VREF2 |
| 8 SDA2 | High-voltage serial data | Open-drain I²C data line on VREF2 side; requires external pull-up to VREF2 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional translation without direction pin | Automatic voltage-sensing pass switch eliminates GPIO overhead and timing-critical direction control logic |
| Flow-through pinout (GND–VREF1–SCL1–SDA1–EN–VREF2–SCL2–SDA2) | Enables straight PCB trace routing across package, minimizing stub length and signal integrity degradation |
| Lock-up free operation | Guaranteed immunity to latch-up under all valid voltage combinations and transition sequences |
| 5 V-tolerant I²C I/O ports | Allows direct interface to legacy 5 V peripherals without external protection circuitry |
| High-impedance isolation when disabled | EN = LOW disconnects SCL1/SDA1 from SCL2/SDA2, preventing bus contention and leakage current paths |
Applications
| Industrial Sensor Hub | Automotive Body Control Module |
|---|---|
|
Use Scenario: Interfacing 1.8 V MEMS sensors and 3.3 V microcontroller in a compact environmental monitoring node. IC Role / Device Role / Timing Role: Voltage-level translator enabling bidirectional I²C communication between mismatched voltage domains while preserving timing integrity. Use Value: Eliminates need for discrete FET solutions or direction-control firmware, reducing BOM count and layout complexity. |
Use Scenario: Connecting 5 V CAN transceiver diagnostics interface to 3.3 V ARM Cortex-M7 host MCU over shared I²C bus. IC Role / Device Role / Timing Role: Level-shifting bridge ensuring robust communication across safety-critical vehicle subsystems. Use Value: Provides ESD-hardened, MSL1-compliant isolation with <2 ns delay-critical for real-time diagnostic response. |
| Consumer Wearable SoC | Medical Point-of-Care Device |
|
Use Scenario: Integrating ultra-low-power 1.2 V biometric sensor array with 2.5 V application processor in battery-operated smartband. IC Role / Device Role / Timing Role: Enables energy-efficient I²C translation with sub-μA quiescent current during EN = LOW sleep state. Use Value: Supports dynamic power gating of sensor subsystems without bus reinitialization or software intervention. |
Use Scenario: Isolating 1.8 V patient-monitoring ADC from 5 V display controller in FDA-class II portable vital signs monitor. IC Role / Device Role / Timing Role: Provides galvanically isolated voltage translation (via disable state) and failsafe bus separation. Use Value: Meets IEC 60601 creepage/clearance requirements when EN is controlled by safety watchdog. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C voltage-level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments PCA9306DCU | Identical pinout, same SO8/VSSOP8/XSON8U variants, functionally identical electrical specs per TI SNOSBQ3D datasheet | No NXP-specific qualification for extended temperature or automotive AEC-Q100; lacks NXP's Dark Green packaging option | Select PCA9306DCU only if TI sourcing preference or existing TI-design ecosystem alignment exists |
| NXP PCA9306DC1,125 | VSSOP8 package (SOT765-1), 2.3 mm body width vs. XSON8U's 2.0 mm width; otherwise identical functionality and specs | Higher board space footprint; less suitable for ultra-dense wearable layouts requiring 3×2 mm footprint | Choose PCA9306DC1,125 when VSSOP8 handling, reflow compatibility, or legacy board reuse is prioritized over miniaturization |
Compared with PCA9306DCU and PCA9306DC1,125, the PCA9306GD1,125 delivers the smallest PCB footprint (3×2 mm), best thermal performance per unit area due to UTLP construction, and NXP's Dark Green halogen/antimony-free material compliance-making it optimal for space-constrained, environmentally regulated designs.
Availability
PCA9306GD1,125 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, consumer wearables, medical point-of-care devices, and embedded IoT gateways requiring stable component supply and long-term lifecycle assurance.
Supply support for PCA9306GD1,125 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
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with headquarters in Eindhoven, Netherlands.
The PCA9306GD1,125 belongs to NXP's I²C level translation product line, designed specifically to simplify mixed-voltage system integration in resource-constrained embedded platforms where size, reliability, and interoperability are critical.
FAQ
What is the minimum voltage difference required between VREF1 and VREF2 for reliable operation of the PCA9306GD1,125?
The PCA9306GD1,125 requires VREF2 to be at least 1.0 V higher than VREF1 for optimal translator performance, as specified in Table 10 and Section 11.1 of the datasheet. For example, with VREF1 = 1.8 V, VREF2 must be ≥2.8 V. This ensures proper EN biasing and avoids undefined switching behavior or increased propagation delay.
Can the PCA9306GD1,125 support I²C Fast-mode Plus (1 MHz) operation?
Yes, the PCA9306GD1,125 supports Fast-mode Plus operation up to >2 MHz under optimized conditions: CL ≤ 30 pF, RPU selected per Table 12 (e.g., 332 Ω for 10 mA sink), and VREF1/VREF2 set per recommended operating conditions. Propagation delay remains <1.2 ns in this configuration, preserving timing margins.
Is the PCA9306GD1,125 pin-compatible with other PCA9306 package variants?
No-PCA9306GD1,125 uses the XSON8U (SOT996-2) package with 3×2 mm body and bottom-terminal layout, whereas PCA9306DC1,125 uses VSSOP8 (SOT765-1) and PCA9306DP1,125 uses TSSOP8 (SOT505-2). Pin functions match across variants, but physical footprint and soldering requirements differ significantly.
Does the PCA9306GD1,125 require external pull-up resistors on both sides of the I²C bus?
Yes, the PCA9306GD1,125 requires external pull-up resistors on both SCL1/SDA1 (to VREF1) and SCL2/SDA2 (to VREF2). Its open-drain I²C interface cannot drive HIGH without them. Recommended values range from 267 Ω to 1.82 kΩ depending on driver strength and voltage combination, per Tables 11–13.
What is the maximum continuous current rating per channel for the PCA9306GD1,125?
The PCA9306GD1,125 has a maximum DC channel current (Isw(pass)) rating of 64 mA per SCL/SDA channel, as defined in Table 5 (Limiting Values). However, recommended operating conditions specify 14 mA max for typical use cases (Table 10), balancing thermal rise and long-term reliability in continuous operation.
PCA9306GD1,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 2
- Voltage - VCCA:
- 1 V ~ 3.6 V
- Voltage - VCCB:
- 1.8 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-XFDFN
PCA9306GD1,125 FAQ
1.How can I place an order for PCA9306GD1,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9306GD1,125 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 PCA9306GD1,125 reliable?
The price and inventory of PCA9306GD1,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9306GD1,125 is usually 5 days.
3.What payment methods are accepted for PCA9306GD1,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9306GD1,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9306GD1,125?
PCA9306GD1,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9306GD1,125 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 PCA9306GD1,125?
For technical support, including PCA9306GD1,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9306GD1,125 requirements.
6.How does Aetrix verify that PCA9306GD1,125 is sourced from the original manufacturer or authorized distributors?
All PCA9306GD1,125 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 PCA9306GD1,125 meets industry standards.
7.What is the process for return or replacement of PCA9306GD1,125?
All PCA9306GD1,125 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9306GD1,125, 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 PCA9306GD1,125 part is unused and in its original packaging.
Return procedure for PCA9306GD1,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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