PCA9846: 4-channel ultra-low voltage, Fm+ I²C-bus switch with reset

The PCA9846 is an ultra-low voltage, quad bidirectional translating switch controlled via the I²C-bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any or all SCx/SDx channels can be selected, determined by the programmable control register. This feature allows multiple devices with the same I²C-bus address to reside on the same bus. The switch device can also separate a heavily loaded I²C-bus into separate bus segments, eliminating the need for a bus buffer.

An active LOW reset input allows the PCA9846 to recover from a situation where one of the downstream I²C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I²C-bus state machine and deselects all the channels, as does the internal Power-On Reset (POR) function.

The pass gates of the switches are constructed such that the VDD1 pin is used to limit the maximum high voltage which is passed by the PCA9846. This allows the use of different bus voltages on each channel, so that 0.8 V, 1.8 V, 2.5 V or 3.3 V parts can communicate without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 3.6 V tolerant.

Outline 3d SOT403-1
数据手册 (1)
名称/描述Modified Date
4-channel ultra-low voltage, Fm+ I2C-bus switch with reset (REV 1.0) PDF (956.0 kB) PCA9846 [English]09 Nov 2015
封装信息 (1)
名称/描述Modified Date
plastic thin shrink small outline package; 16 leads; body width 4.4 mm (REV 1.0) PDF (300.0 kB) SOT403-1 [English]08 Feb 2016
包装 (1)
名称/描述Modified Date
TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (218.0 kB) SOT403-1_118 [English]08 Apr 2013
支持信息 (1)
名称/描述Modified Date
Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE [English]08 Oct 2009
订购信息
型号状态
PCA9846PWActive
封装环保信息
产品编号封装说明Outline Version回流/波峰焊接包装产品状态部件编号订购码 (12NC)Marking化学成分RoHS / 无铅 / RHF无铅转换日期MSLMSL LF
PCA9846PWSOT403-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1ActivePCA9846PWJ (9353 066 98118)Standard MarkingPCA9846PWAlways Pb-free11
4-channel ultra-low voltage, Fm+ I2C-bus switch with reset pca9846bs
SOT403-1 LPC812M101JDH16
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
Reel 13" Q1/T1 LPC812M101JDH16
PCA9633