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Updated at 02/11/2025 10:30:15(UTC+8)
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Description
- Overview
- The PCA9515 is a BiCMOS integrated circuit intended for application in I²C-bus and SMBus systems.
- While retaining all the operating modes and features of the I²C-bus system, it permits extension of the I²C-bus by buffering both the data (SDAn) and the clock (SCLn) lines, thus enabling two buses of 400 pF.
- The I²C-bus capacitance limit of 400 pF restricts the number of devices and bus length. Using the PCA9515 enables the system designer to isolate two halves of a bus, thus more devices or longer length can be accommodated. It can also be used to run two buses, one at 5 V and the other at 3.3 V or a 400 kHz and 100 kHz bus, where the 100 kHz bus is isolated when 400 kHz operation of the other is required.
- **Two or more**PCA9515**s cannot be put in series.**The PCA9515 design does not allow this configuration. Since there is no direction pin, slightly different "legal" low voltage levels are used to avoid lock-up conditions between the input and the output. A "regular low" applied at the input of a PCA9515 will be propagated as a "buffered low" with a slightly higher value. When this "buffered low" is applied to another PCA9515, PCA9516A, or PCA9518A in series, the second PCA9515, PCA9516A, or PCA9518A will not recognize it as a "regular low" and will not propagate it as a "buffered low" again. The PCA9510A/9511A/9513A/9514A and PCA9512A cannot be used in series with the PCA9515, PCA9516A, or PCA9518A but can be used in series with themselves since they use shifting instead of static offsets to avoid lock-up conditions.
- The PCA9515 SCLn/SDAn Ci is about 200 pF versus the normal < 10 pF when VCC= 0 V. The newer PCA9515A should be used in applications where power is secured to the repeater but an active bus remains on either set of SCLn/SDAn pins to prevent this increase in bus loading. Additionally, the PCA9515A has a wider voltage range of 2.3 V to 3.6 V and can be used in applications with lower voltage supply constraints.
- MoreLess
- ## Features
- * 2 channel, bidirectional buffer
- * I²C-bus and SMBus compatible
- * Active HIGH repeater enable input
- * Open-drain input/outputs
- * Lock-up free operation
- * Supports arbitration and clock stretching across the repeater
- * Accommodates Standard-mode and Fast-mode I²C-bus devices and multiple masters
- * Powered-off high-impedance I²C-bus pins
- * Operating supply voltage range of 3.0 V to 3.6 V
- * 5.5 V tolerant I²C-bus (SCLn, SDAn) and enable (EN) pins
- * 0 Hz to 400 kHz clock frequency1
- * ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
- * Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
- * Packages offered: SO8 and TSSOP8 (MSOP8)
- 1\\. The maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater.
- ## Features
PCA9515DP Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Mounting Style | Surface Mount |
| Number of Pins | 8 Pin |
| Case/Package | TSSOP-8 |
| Show | |
| Product Lifecycle Status | Unknown |
| Packaging | Tape & Reel (TR) |
| RoHS | RoHS Compliant |
| Lead-Free Status | Lead Free |
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