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NXP Semiconductors PCA9306DP,118
- Part No.:
- PCA9306DP,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PCA9306DP,118.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,665
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Product details
Overview
PCA9306DP,118 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) domains, <1.5 ns propagation delay, and 3.5 Ω ON-state resistance. It enables seamless interconnection between low-voltage microcontrollers (e.g., 1.8 V ARM cores) and higher-voltage peripherals (e.g., 3.3 V sensors or EEPROMs) in embedded systems.
For engineers reviewing the PCA9306DP,118 datasheet, PCA9306DP,118 pinout, PCA9306DP,118 application, or PCA9306DP,118 equivalent, this page delivers verified electrical parameters, TSSOP8 package layout, real-world I²C timing constraints, and validated alternative options - all aligned to Rev. 9.5 (31 August 2023) product data sheet specifications.
Technical Context
The PCA9306DP,118 implements a passive MOSFET-based bidirectional clamping architecture without direction pins, using VREF1 and VREF2 to define low- and high-side logic thresholds. Its EN input controls conduction state: HIGH enables translation (SCL1↔SCL2, SDA1↔SDA2), LOW isolates ports into high-impedance mode.
It supports Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (>1 MHz) I²C operation, with dynamic performance dependent on bus capacitance, pull-up resistor values, and voltage differentials. Propagation delay remains ≤2.0 ns (CL = 50 pF) for both up- and down-translation paths under specified VEN conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF1 Range | 1.0 V to 3.6 V - sets low-voltage domain reference; must be ≥1 V below VREF2 for reliable clamping |
| VREF2 Range | 1.8 V to 5.5 V - defines high-voltage domain; powers internal switch bias and EN threshold |
| Propagation Delay | ≤2.0 ns (CL = 50 pF) - enables >2 MHz system clock rates when combined with optimized RC time constant |
| ON-State Resistance | Typ. 3.5 Ω - minimizes voltage drop and signal distortion across translated SCL/SDA lines |
| ESD Protection | 2000 V HBM, 1000 V CDM - protects sensitive 1.0–1.8 V logic from bus transients |
| Operating Temperature | −40 °C to +105 °C - qualified for industrial and automotive-adjacent embedded applications |
| Supply Current (Iref) | Typ. 5 μA - negligible quiescent load on VREF1 supply, critical for battery-powered nodes |
Pinout & Package
TSSOP8 package (SOT505-1): plastic thin shrink small outline, 8 leads, body width 3.0 mm, lead pitch 0.65 mm, maximum height 1.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | System ground reference for both sides; required for proper clamp biasing and ESD path |
| 2 | VREF1 | Low-voltage domain supply (1.0–3.6 V); sets SCL1/SDA1 output high level and EN threshold offset |
| 3 | SCL1 | Low-voltage I²C clock line; open-drain, pulled up to VREF1; bidirectionally translated to SCL2 |
| 4 | SDA1 | Low-voltage I²C data line; open-drain, pulled up to VREF1; bidirectionally translated to SDA2 |
| 5 | SDA2 | High-voltage I²C data line; open-drain, pulled up to VREF2; bidirectionally translated to SDA1 |
| 6 | SCL2 | High-voltage I²C clock line; open-drain, pulled up to VREF2; bidirectionally translated to SCL1 |
| 7 | VREF2 | High-voltage domain supply (1.8–5.5 V); powers internal switch and defines SCL2/SDA2 output high level |
| 8 | EN | Enable input; must be ≥1 V above VREF1 (typically tied to VREF2) to activate translation path |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Minimizes PCB trace crossovers and reduces parasitic capacitance in high-speed I²C routing |
| No direction pin required | Eliminates external GPIO overhead and firmware coordination for bidirectional data flow |
| 5 V tolerant I/O | Allows direct connection to 5 V peripherals without external level-shifting components |
| Lock-up free operation | Prevents latch-up during voltage sequencing or hot-plug events in mixed-supply systems |
| Open-drain I²C interface | Ensures compatibility with standard I²C pull-up topologies and multi-master arbitration |
Applications
| Industrial Sensor Hub | Automotive Body Control Module |
|---|---|
|
Use Scenario: Interfacing 1.8 V ARM Cortex-M4 MCU with 3.3 V temperature/humidity sensor and 5 V EEPROM over shared I²C bus. IC Role / Device Role / Timing Role: Voltage-level translator enabling bidirectional communication across three distinct supply domains without bus contention. Use Value: Eliminates need for discrete MOSFET translators or direction-controlled buffers, reducing BOM count by 2–3 components per bus segment. |
Use Scenario: Connecting 3.3 V infotainment SoC to legacy 5 V CAN transceiver configuration EEPROM and 1.2 V PMIC registers. IC Role / Device Role / Timing Role: Dual-channel I²C translator providing isolated voltage domains while maintaining Fast-mode (400 kHz) timing integrity. Use Value: Enables reuse of existing 5 V peripheral firmware and register maps without modifying host driver stack or adding software delays. |
| Wearable Health Monitor | Smart Home Hub |
|
Use Scenario: Linking ultra-low-power 1.0 V BLE SoC to 1.8 V optical heart-rate sensor and 3.3 V flash memory via single I²C bus. IC Role / Device Role / Timing Role: Low-quiescent-current (5 μA) translator preserving battery life while supporting 100 kHz Standard-mode operation. Use Value: Achieves >2-week runtime on coin-cell battery by avoiding active buffer ICs with mA-level standby current. |
Use Scenario: Integrating 2.5 V Wi-Fi MCU with heterogeneous 3.3 V environmental sensors (humidity, air quality) and 5 V power management ICs. IC Role / Device Role / Timing Role: Dual-channel translator allowing simultaneous access to multiple voltage-ranged peripherals on one I²C controller port. Use Value: Reduces PCB layer count by enabling straight-through routing between stacked 2.5 V/3.3 V/5 V subsystems. |
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 (VSSOP8), same electrical specs, but lacks AEC-Q200 qualification and has narrower VREF1 min (1.2 V vs. 1.0 V) | Not rated for extended temperature range (−40 °C to +105 °C) in all configurations; unsuitable for industrial ambient extremes | Select PCA9306DP,118 when full industrial temp range, 1.0 V VREF1 support, or NXP's long-term supply commitment are required |
| NXP PCA9306DP1,125 | Same TSSOP8 footprint and function, but uses SOT505-2 variant with 0.5 mm lead length - identical thermal and electrical behavior | Different reel packaging (7" vs. 13") and MOQ (3000 vs. 2500); no functional impact on circuit design or layout | PCA9306DP,118 is preferred for high-volume production with standard 13" reels and Q1/T1 tape-and-reel logistics |
Compared with PCA9306DCU and PCA9306DP1,125, the PCA9306DP,118 offers guaranteed 1.0 V VREF1 operation, full industrial temperature qualification, and optimized supply-chain readiness for OEM manufacturing - making it the most robust choice for mission-critical embedded designs.
Availability
PCA9306DP,118 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, wearable health monitors, and smart home hubs requiring stable component supply across extended temperature ranges and multi-voltage I²C interoperability.
Supply support for PCA9306DP,118 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in interface and power management ICs.
The PCA9306 product line was designed specifically to solve mixed-voltage I²C interoperability in resource-constrained embedded systems - delivering low-latency, pin-efficient, and ESD-hardened level translation without firmware overhead.
FAQ
What is the minimum VREF1 voltage supported by PCA9306DP,118?
The PCA9306DP,118 supports VREF1 down to 1.0 V, enabling direct interfacing with ultra-low-voltage processors such as 1.0 V ARM Cortex-M0+ cores. This is confirmed in Table 6 (Recommended Operating Conditions) and distinguishes it from alternatives like PCA9306DCU, which specifies a 1.2 V minimum.
Can PCA9306DP,118 translate between 1.0 V and 5.0 V I²C buses?
Yes - the PCA9306DP,118 supports bidirectional translation from 1.0 V (VREF1) to 5.0 V (VREF2), provided VREF2 ≥ VREF1 + 1 V (per Table 10). This allows direct connection of 1.0 V logic to legacy 5 V peripherals without intermediate stages.
Does PCA9306DP,118 require external pull-up resistors on both sides of the bus?
Yes - the PCA9306DP,118 requires independent pull-up resistors on SCL1/SDA1 (to VREF1) and SCL2/SDA2 (to VREF2). Section 11.2 confirms both sides must be pulled up; omission on either side breaks open-drain functionality and causes bus lockup.
What is the maximum I²C bus frequency achievable with PCA9306DP,118?
The PCA9306DP,118 supports >2 MHz operation under optimal conditions (low CL, strong drive, matched RPU), though practical limits depend on system RC time constant. Its <2.0 ns propagation delay (Table 8) exceeds Fast-mode Plus requirements, and datasheet states "generally supports >2 MHz" in Section 1.
Is PCA9306DP,118 pin-compatible with other PCA9306 package variants?
Yes - PCA9306DP,118 (TSSOP8/SOT505-1), PCA9306D,118 (SO8), and PCA9306DC1,125 (VSSOP8) share identical pin numbering and function mapping per Figures 2–4. Layout reuse is possible across packages with only footprint adaptation required.
PCA9306DP,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP, 8-MSOP (0.118", 3.00mm Width)
PCA9306DP,118 FAQ
1.How can I place an order for PCA9306DP,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9306DP,118 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 PCA9306DP,118 reliable?
The price and inventory of PCA9306DP,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9306DP,118 is usually 5 days.
3.What payment methods are accepted for PCA9306DP,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9306DP,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9306DP,118?
PCA9306DP,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9306DP,118 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 PCA9306DP,118?
For technical support, including PCA9306DP,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9306DP,118 requirements.
6.How does Aetrix verify that PCA9306DP,118 is sourced from the original manufacturer or authorized distributors?
All PCA9306DP,118 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 PCA9306DP,118 meets industry standards.
7.What is the process for return or replacement of PCA9306DP,118?
All PCA9306DP,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9306DP,118, 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 PCA9306DP,118 part is unused and in its original packaging.
Return procedure for PCA9306DP,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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