PI4MSD5V9542A 2 Channel I2Cbus Multiplexer with interrupt logic Features Description 1-of-2 bidirectional translating multiplexer The PI4MSD5V9542A is a 1-of-2 bidirectional I2C-bus interface logic translating multiplexer, controlled via the I2C bus. The Operating power supply voltage :1.65 V to 5.5 V SCL/SDA upstream pair fans out to two SCx/SDx Allows voltage level translation between 1.2V, downstream pairs, or channels. 1.8V,2.5 V, 3.3 V and 5 V buses Only one SCx/SDx channel is selected at a time, Low standby current determined by the contents of the programmable control Low Ron switches register. Two interrupt inputs, INT0 and INT1, one for Channel selection via I2C bus each of the SCx/SDx downstream pairs, are provided. Power-up with all multiplexer channels deselected One interrupt output, INT, which acts as an AND of the Capacitance isolation when channel disabled two interrupt inputs, is provided. No glitch on power-up A power-on reset function puts the registers in their Supports hot insertion default state and initializes the I2C bus state machine 5 V tolerant inputs with no channels selected. 0 Hz to 400 kHz clock frequency The pass gates of the multiplexer are constructed ESD protection exceeds 8000 V HBM per JESD22- such that the VCC pin can be used to limit the maximum A114, and 1000 V CDM per JESD22-C101 high voltage which will be passed by the Latch-up testing is done to JEDEC Standard PI4MSD5V9542A. This allows the use of different bus JESD78 which exceeds 100 mA voltages on each SCx/SDx pair, so that1.2V, 1.8 V, 2.5 Packages offered: SOIC-14W,TSSOP-14L 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 pins are 5 V tolerant. Pin Description Pin Configuration Pin Pin Type Description No Name 1 A0 Input address input 0 2 A1 Input address input 1 3 A2 Input address input 2 4 Input active LOW interrupt input 0 INT0 I/O 5 SD0 serial data 0 TSSOP SOIC 6 SC0 I/O serial clock 0 Ground 7 GND supply ground 8 Input active LOW interrupt input 1 INT1 9 SD1 I/O serial data 1 10 SC1 I/O serial clock 1 11 Output active LOW interrupt output INT I/O 12 SCL serial clock line 13 SDA I/O serial data line Power 14 VCC supply voltage 2015-07-0033 PT0523-4 8/18/15 1 PI4MSD5V9542A 2 Channel I2C bus Multiplexer with Interrupt Logic Block Diagram Figure 1: Block Diagram Maximum Ratings Note: Storage Temperature .................................................55C to +125C Stresses greater than those listed under MAXIMUM Supply Voltage port B .................................................0.5V to +6.0V RATINGS may cause permanent damage to the Supply Voltage port A ................................................0.5V to +6.0V device. This is a stress rating only and functional DC Input Voltage ....................................................... 0.5V to +6.0V operation of the device at these or any other condi- Control Input Voltage (EN) .................................. 0.5V to +6.0V tions above those indicated in the operational sec- (1) Total power dissipation .......................................................100mW tions of this specification is not implied. Exposure Input current(EN,VCCA,VCCB,GND).....................................50mA to absolute maximum rating conditions for extended ESD: HBM Mode .....................................................................8000V periods may affect reliability. Recommended operation conditions Symbol Parameter Min Typ Max Unit V 1.65 - 5.5 V CC V Positive DC Supply Voltage CCA V GND - 5.5 V Enable Control Pin Voltage EN V I/O Pin Voltage GND - 5.5 V IO t /V - - 10 ns/V Input transition rise or fall time T 40 - +85 C A Operating Temperature Range 2015-07-0033 PT0523-4 8/18/15 2