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TI PCA9543ADRRoHS

Manufacturer
TI
MPN
PCA9543ADR
LCSC Part #
C181521
Packaging
SOIC-14
Customer #
Key Attributes
2-channel I2C bus switch with interrupt logic and reset function
Datasheetpdf iconTI PCA9543ADR
In-Stock: 191
191 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 1.1976$ 1.20
10+$ 1.0661$ 10.66
30+$ 0.9412$ 28.24
100+$ 0.8487$ 84.87
500+$ 0.8114$ 405.70
1,000+$ 0.7935$ 793.50
Standard Packaging2500/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Interface/Specialized
ManufacturerTI
PackagingSOIC-14
Ron20Ω
Switch Circuit2:1
Voltage - Supply2.3V~5.5V
Propagation Delay4ns
TypeTelecom
FeaturesBidirectional analog channel;Level shifting;Control interface integration;Power-on reset security;Hot-swap protection
Operating Temperature-40℃~+85℃
Number of Channels2
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging2500
Sales UnitPiece

Introduction

AI Translation

The PCA9543A is a dual-channel bidirectional switch controlled by the I2C bus. The upstream SCL/SDA pair is extended to two downstream pairs, or channels. Based on the content of the programmable control register, either a single SCn/SDn channel or both channels can be selected. Two interrupt inputs (INT1 - INT0) are provided, with each interrupt input corresponding to one downstream pair. One interrupt output (INT) can serve as the AND operation result of the two interrupt inputs. An active-low reset (RESET) input enables the PCA9543A to recover when one of the downstream I2C buses remains low for an extended period. Pulling RESET low resets the I2C state machine and deselects both channels, which has the same effect as the internal power-on reset function. Due to the conducting gates on the switch, the VCC pin can be used to limit the maximum voltage that the PCA9543A will pass. This allows different bus voltages to be used on each pair, so that 1.8V, 2.5V, or 3.3V components can communicate with 5V components without any additional protection. For each channel, an external pull-up resistor pulls the bus voltage to the desired voltage level. All I/O pins are rated for 5.5V.

Features

AI Translation
  • 2-of-1 bidirectional translation switch compatible with I2C bus and SMBus
  • Two active-low interrupt inputs
  • Active-low interrupt output
  • Active-low reset input
  • Two address pins allowing up to four PCA9543A devices on the I2C bus in any combination for channel selection via I2C bus
  • All switch channels deselected at power-on
  • Low RON switches
  • Voltage level translation between 1.8V, 2.5V, 3.3V, and 5V buses
  • No glitch at power-on
  • Hot-insertion capable
  • Low standby current
  • Operating supply voltage range: 2.3V to 5.5V
  • 5.5V tolerant inputs
  • Clock frequency: 0 to 400kHz
  • Latch-up performance exceeds 100mA per JESD78
  • ESD protection exceeds JESD 22 requirements
  • 2000V Human Body Model (A114-A)
  • 1000V Charged Device Model (C101)

Applications

AI Translation
  • Servers
  • Routers (telecom switching equipment)
  • Factory automation
  • Products with I2C slave address conflicts (e.g., multiple identical temperature sensors)