NCA9548-DTSXR

Novosense
NCA9548 8-channel I2C-bus switch with reset Datasheet (EN) 1.0 Product Overview The NCA9548 is an octal bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. An active-low res...
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Корпус TSSOP-24
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NCA9548 8-channel I2C-bus switch with reset Datasheet (EN) 1.0 Product Overview The NCA9548 is an octal bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. An active-low reset (RESET) input allows the NCA9548 to recover from a situation in which one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets, the I2C state machine and causes all the channels to be deselected, as does the internal power-on reset function. The pass gates of the switches are constructed such that the VCC terminal can be used to limit the maximum high voltage, which will be passed by the NCA9548. This allows the use of different bus voltages on each pair, so that 1.8V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O terminals are 5.5 V tolerant.  Operating Power-Supply Voltage Range of 2.3 V to 5.5 V  5.5 V Tolerant Inputs  0 to 400-kHz Clock Frequency  Latch-Up Performance Exceeds 100 mA per JESD 78  ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 1000-V Charged-Device Model (C101) Applications  Servers  Routers (Telecom Switching Equipment)  Factory Automation  Products with I2C Slave Address Conflicts (e.g., Multiple, Identical Temp Sensors) Device Information Part Number NCA9548-DTSXR Package TSSOP24 Body Size 7.8mm*4.4mm Key Features  1-of-8 Bidirectional Translating Switches Functional Block Diagrams  I2C Bus and SMBus Compatible  Active-Low Reset Input  Three Address Terminals, Allowing up to Four Devices on the I2C Bus  Channel Selection via I2C Bus, in Any Combination A0 1 24 VCC A1 2 23 SDA RESET SD0 4 21 A2 SC0 5 20 SC7  Power-Up with All Switch Channels Deselected SD1 6  Low RON Switches SC1 7  Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3V, and 5-V Buses  No Glitch on Power-Up  Supports Hot Insertion  Low Standby Current Copyright © 2021, NOVOSENSE 22 SCL 3 19 SD7 NCA9548 18 SC6 SD2 8 17 SD6 SC2 9 16 SC5 SD3 10 15 SD5 SC3 11 14 SC4 GND 12 13 SD4 Figure 1. NCA9548 Block Diagram Page 1 PDF
Документация на NCA9548-DTSXR 

Дата модификации: 14.05.2021

Размер: 1.11 Мб

21 стр.

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