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NXP Semiconductors PCA9306DC1,125
- Part No.:
- PCA9306DC1,125
- Manufacturer:
- NXP Semiconductors
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PCA9306DC1,125.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8VSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
PCA9306DC1,125 from NXP Semiconductors is a dual bidirectional I²C-bus and SMBus voltage-level translator in VSSOP8 package, supporting 1.0–3.6 V (VREF1) and 1.8–5.5 V (VREF2) translation domains, with <1.5 ns max propagation delay, 3.5 Ω typical ON-state resistance, and enable-controlled isolation. It enables interoperability between 1.8 V microcontrollers and 3.3 V sensors in embedded system interconnects.
For engineers reviewing the PCA9306DC1,125 datasheet, PCA9306DC1,125 pinout, PCA9306DC1,125 application, or PCA9306DC1,125 equivalent, key selection criteria include bidirectional level-shifting without direction pin, VSSOP8 footprint compatibility with TI PCA9306DCU, EN logic referenced to VREF2, and support for Fast-mode Plus (≥1 MHz) operation under controlled RC loading.
Technical Context
The PCA9306DC1,125 implements a passive FET-based clamping architecture with two independent bidirectional channels (SCL/SDA), where voltage translation occurs via controlled channel conduction-no internal logic or buffering. Its EN input directly controls switch state: HIGH enables low-impedance connection between SCL1↔SCL2 and SDA1↔SDA2; LOW forces high-impedance isolation on all four I/O pins.
Unlike bus buffers (e.g., PCA9517A), it provides no physical capacitance isolation when active-only electrical level translation. Translation directionality is inherently determined by instantaneous voltage differential across each channel, requiring VREF2 ≥ VREF1 + 1 V for reliable operation per NXP's application guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF1 Range | 1.0 V to 3.6 V - sets low-voltage domain reference for SCL1/SDA1; must be ≥1.0 V and ≤(VREF2 − 1 V) for stable clamping |
| VREF2 Range | 1.8 V to 5.5 V - sets high-voltage domain reference for SCL2/SDA2; supplies EN bias and pull-up target voltage |
| Max Propagation Delay | <1.5 ns - ensures timing compliance with Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz+) I²C systems |
| ON-State Resistance | 3.5 Ω typical - minimizes signal distortion and voltage drop during active translation; enables >64 mA pass current at 3.3 V |
| ESD Protection | 2000 V HBM / 1000 V CDM - protects downstream 1.0–1.8 V logic from ESD events on higher-voltage I²C lines |
| Operating Temperature | −40 °C to +105 °C - qualified for industrial and automotive-adjacent embedded applications with extended thermal margins |
| Package | VSSOP8 (SOT765-1), 2.3 mm body width - compact footprint compatible with TI PCA9306DCU; flow-through pinout simplifies PCB routing |
Pinout & Package
VSSOP8 package (SOT765-1): plastic very thin shrink small outline, 8 leads, 2.3 mm body width, 0.65 mm pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Common return path for both voltage domains; must be low-impedance and shared with VREF1/VREF2 supplies |
| 2 VREF1 | Low-side reference supply | Defines logic HIGH threshold for SCL1/SDA1; connects to 1.0–3.6 V core supply of low-voltage device |
| 3 SCL1 | Low-voltage I²C clock | Open-drain I/O; requires external pull-up to VREF1; bidirectionally translated to SCL2 when EN = HIGH |
| 4 SDA1 | Low-voltage I²C data | Open-drain I/O; requires external pull-up to VREF1; bidirectionally translated to SDA2 when EN = HIGH |
| 5 SDA2 | High-voltage I²C data | Open-drain I/O; requires external pull-up to VREF2; bidirectionally translated to SDA1 when EN = HIGH |
| 6 SCL2 | High-voltage I²C clock | Open-drain I/O; requires external pull-up to VREF2; bidirectionally translated to SCL1 when EN = HIGH |
| 7 VREF2 | High-side reference supply | Defines logic HIGH threshold for SCL2/SDA2; supplies EN bias and pull-up target; must be ≥(VREF1 + 1 V) |
| 8 EN | Enable control input | Active-HIGH; referenced to VREF2; must be pulled to VREF2 via ≥200 kΩ resistor for reliable switching |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional translation without direction pin | Eliminates need for GPIO-controlled direction signals-reduces MCU pin count and firmware complexity in mixed-voltage I²C topologies |
| Flow-through pinout (1–8: GND–EN) | Enables straight trace routing across package; reduces layer count and crosstalk risk in dense PCB layouts |
| 5 V tolerant I²C I/O ports | Allows direct interface with legacy 5 V peripherals while protecting 1.0–1.8 V controllers from overvoltage stress |
| Lock-up free operation | Guarantees no latch-up or destructive current paths during voltage sequencing or hot-plug events |
| Standard/Fast/Fast-mode Plus I²C compatible | Supports up to >2 MHz operation under optimal RC conditions-enables migration from legacy 100 kHz to high-speed sensor buses |
Applications
| Industrial Sensor Hub | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing 1.8 V ARM Cortex-M4 microcontroller with 3.3 V temperature/humidity sensors and 5 V CAN transceivers via shared I²C bus. IC Role / Device Role / Timing Role: Voltage-level translator enabling bidirectional communication across three voltage domains while preserving I²C timing integrity. Use Value: Eliminates discrete MOSFET solutions; maintains <1.5 ns propagation delay to meet Fast-mode Plus timing budgets under 30 pF bus load. |
Use Scenario: Connecting 1.2 V infotainment SoC I²C master to 3.3 V EEPROM, 5 V lighting controller, and legacy 2.5 V diagnostics ICs. IC Role / Device Role / Timing Role: Isolates voltage domains during sleep mode (EN = LOW) and enables seamless wake-up translation (EN = HIGH). Use Value: High-impedance disable state prevents leakage current in low-power states; −40 °C to +105 °C rating supports under-hood deployment. |
| Server Management Controller | Medical Wearable Subsystem |
Use Scenario: BMC (Baseboard Management Controller) at 3.3 V communicating with 1.0 V PMBus-configurable VRMs and 1.8 V FPGA configuration EEPROMs. IC Role / Device Role / Timing Role: Dual-channel translator ensuring simultaneous SCL/SDA level shifting without skew between clock and data lines. Use Value: Matched propagation delay (<1.5 ns) across SCL/SDA channels prevents setup/hold violations in high-reliability server firmware updates. |
Use Scenario: Ultra-low-power wearable SoC (1.0 V core) reading biometric sensor data from 1.8 V analog front-end and 3.3 V Bluetooth LE module. IC Role / Device Role / Timing Role: Enables power-gated sensor subsystems by disabling translation (EN = LOW) during idle periods. Use Value: 2000 V HBM ESD protection safeguards sensitive analog sensor inputs from human-body discharge during handling and field use. |
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, electrical specs, and VSSOP8 package (SOT765-1); same 1.0–3.6 V / 1.8–5.5 V translation range and <1.5 ns delay | No functional difference; TI version uses different marking ("P06") and lead-free halogen-free material per PCN202103046A | Select PCA9306DC1,125 for NXP-sourced supply chain continuity and documented ASEN dark-green packaging compliance |
| NXP PCA9306DP1,125 | TSSOP8 package (SOT505-2), 3 mm body width; identical internal silicon, same VREF1/VREF2 ranges and propagation delay | Larger footprint eases hand-soldering and rework; slightly higher thermal resistance vs. VSSOP8 but same −40 °C to +105 °C rating | Choose PCA9306DP1,125 when board space allows larger package or when TSSOP8 is already standardized in design library |
Compared with TI PCA9306DCU, PCA9306DC1,125 offers identical functionality with NXP-specific packaging and traceability; versus PCA9306DP1,125, it delivers 30 % smaller PCB area and improved high-frequency signal integrity due to lower parasitic inductance in VSSOP8.
Availability
PCA9306DC1,125 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, server management controllers, and medical wearable subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PCA9306DC1,125 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PCA9306 product line was designed specifically for robust, pin-compatible I²C/SMBus voltage translation in mixed-supply embedded systems-addressing interoperability gaps between legacy and next-generation low-voltage processors and peripherals.
FAQ
What is the minimum voltage difference required between VREF2 and VREF1 for reliable operation of the PCA9306DC1,125?
The PCA9306DC1,125 requires VREF2 ≥ VREF1 + 1 V for optimal clamping behavior and noise margin. This is specified in Table 6 (Recommended Operating Conditions) and reinforced in Figure 9's application note. Operating below this delta may cause incomplete translation or increased propagation delay. The PCA9306DC1,125 datasheet confirms this as a design constraint-not a recommendation-to ensure predictable bidirectional switching.
Can the PCA9306DC1,125 translate between 1.0 V and 5.0 V I²C buses?
Yes, the PCA9306DC1,125 supports translation from 1.0 V (VREF1) to 5.0 V (VREF2) as explicitly listed in Section 2 Features and Benefits. This requires VREF1 = 1.0 V, VREF2 = 5.0 V, EN pulled to 5.0 V, and appropriate pull-up resistors on both sides. The PCA9306DC1,125's limiting values confirm VI/O tolerance up to 6 V, making 5 V operation within absolute maximum ratings.
Is the PCA9306DC1,125 pin-compatible with Texas Instruments' PCA9306DCU?
Yes-the PCA9306DC1,125 shares identical VSSOP8 pinout, electrical characteristics, and functional behavior with TI's PCA9306DCU, as confirmed in Table 1 footnote [1] ("Same footprint and pinout as the Texas Instruments PCA9306DCU"). Both use SOT765-1 package and match pin-for-pin: GND, VREF1, SCL1, SDA1, SDA2, SCL2, VREF2, EN.
Does the PCA9306DC1,125 require external pull-up resistors on both sides of the I²C bus?
Yes-per Section 1 General Description and Figure 9, external pull-up resistors are mandatory on both SCL1/SDA1 (to VREF1) and SCL2/SDA2 (to VREF2). The PCA9306DC1,125 has open-drain I/Os and no internal pull-ups. Table 11–13 provide minimum resistor values based on driver strength (3 mA/10 mA/15 mA) and voltage combinations.
What is the maximum I²C bus frequency supported by the PCA9306DC1,125?
The PCA9306DC1,125 supports >2 MHz operation under ideal conditions (low node capacitance, strong drive, optimized pull-ups), as stated in Section 1. However, practical maximum frequency depends on RC time constant-Section 11.3 notes that rise/fall times dominate limit. For 400 kHz Fast-mode, the <1.5 ns propagation delay ensures ample timing margin; for 1 MHz Fast-mode Plus, layout optimization is essential.
PCA9306DC1,125 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-VFSOP (0.091", 2.30mm Width)
PCA9306DC1,125 FAQ
1.How can I place an order for PCA9306DC1,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9306DC1,125 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 PCA9306DC1,125 reliable?
The price and inventory of PCA9306DC1,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9306DC1,125 is usually 5 days.
3.What payment methods are accepted for PCA9306DC1,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9306DC1,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9306DC1,125?
PCA9306DC1,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9306DC1,125 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 PCA9306DC1,125?
For technical support, including PCA9306DC1,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9306DC1,125 requirements.
6.How does Aetrix verify that PCA9306DC1,125 is sourced from the original manufacturer or authorized distributors?
All PCA9306DC1,125 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 PCA9306DC1,125 meets industry standards.
7.What is the process for return or replacement of PCA9306DC1,125?
All PCA9306DC1,125 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9306DC1,125, 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 PCA9306DC1,125 part is unused and in its original packaging.
Return procedure for PCA9306DC1,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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