PCA9601DP,118 NXP Integrated Circuit (Small Outline Packages) In Stock
NXP PCA9601DP,118 is a dual bidirectional I2C/SMBus bus buffer IC in an 8-pin TSSOP package that isolates bus segments for capacitance extension and voltage translation between 2.3 V to 5.5 V rails. Supports Standard Mode (100 kHz) and Fast Mode (400 kHz) I2C. Available from global distributors with worldwide shipping.
- Manufacturer
- NXP
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- PCA9601DP,118 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual bidirectional I2C/SMBus buffer enabling bus segment isolation to extend total bus capacitance beyond the standard 400 pF limit
- 2.3 V to 5.5 V supply voltage range on each port supporting level translation between 3.3 V and 5 V I2C bus segments
- Compatible with 100 kHz Standard Mode and 400 kHz Fast Mode I2C speeds for broad system management bus integration
- 8-pin TSSOP (SOT505-1) package providing compact footprint for multi-board I2C bus segmentation in server and industrial backplane designs
Applications
The PCA9601DP,118 is designed to segment and buffer I2C or SMBus lines in multi-board systems where total bus capacitance would otherwise violate the 400 pF limit specified by the I2C standard. Each of its two bidirectional channels independently drives both SCL and SDA, enabling 1-to-2 fan-out or cascaded buffering across PCB connectors, cables, and backplanes. It is commonly used in server management architectures, industrial controller racks, and multi-sensor IoT gateways requiring reliable 400 kHz Fast Mode I2C communication across high-capacitance bus topologies.
Specifications
| Manufacturer Package Code | SOT505-1 |
| Factory Lead Time | 52Weeks |
| YTEOL | 0 |
| Interface IC Type | BUS BUFFERS |
| JESD-30 Code | S-PDSO-G8 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max | 15V |
| Supply Voltage-Min | 2.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PCA9601DP,118:
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Frequently Asked Questions
How does the PCA9601DP,118 extend I2C bus capacitance beyond the 400 pF standard limit?
The PCA9601DP,118 presents a buffered interface on each of its 2 bidirectional channels, so each bus segment sees only the input capacitance of the buffer (typically 10 pF) rather than the total cumulative capacitance of all attached devices. This allows each segment to independently accommodate up to 400 pF, effectively permitting total system bus capacitance of 800 pF or more across both channels while maintaining 400 kHz Fast Mode timing.
Can the PCA9601DP,118 translate voltage levels between a 3.3 V microcontroller I2C bus and a 5 V legacy sensor bus?
Yes. The PCA9601 operates with VCC1 and VCC2 independently configurable from 2.3 V to 5.5 V, enabling bidirectional level translation between a 3.3 V master I2C port and a 5 V sensor or EEPROM bus segment. The internal logic automatically handles open-drain pull-up levels on each side, eliminating external level-shifter FETs for both SCL and SDA lines in a single 8-pin TSSOP device.
What I2C operating speeds does the PCA9601DP,118 support and at what bus voltage?
The PCA9601DP,118 supports both 100 kHz Standard Mode and 400 kHz Fast Mode I2C and SMBus operation across its 2.3 V to 5.5 V supply range. At 400 kHz Fast Mode, rise times must remain under 300 ns per the I2C specification, which the PCA9601's active pull-up drive meets when external pull-up resistors are sized to 2.2 kΩ or lower for bus capacitances below 200 pF per segment.
How many bus devices can be connected across both ports of the PCA9601DP,118 while keeping each segment within the 400 pF capacitance limit?
With typical I2C device bus pin capacitance of 10 pF to 20 pF per device and PCB trace capacitance of 1 pF/cm, each of the PCA9601's 2 ports can safely accommodate 15 to 30 device connections before approaching the 400 pF per-segment ceiling. In a server management bus design with 20 power modules (15 pF each = 300 pF) plus 50 cm of PCB trace (50 pF), a single PCA9601 channel handles the entire segment within spec.
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