PI4MSD5V9544A 4 Channel I2C bus Multiplexer with interrupt logic Features Only one SCx/SDx channel is selected at a time, 1-of-4 bidirectional translating multiplexer determined by the contents of the programmable control I2C-bus interface logic register. Four interrupt inputs, INT0 to INT3, one for Operating power supply voltage :1.65 V to 5.5 V each of the SCx/SDx downstream pairs, are provided. Allows voltage level translation between 1.2V, One interrupt output, INT, which acts as an AND of the 1.8V,2.5 V, 3.3 V and 5 V buses four interrupt inputs, is provided. Low standby current A power-on reset function puts the registers in their Low Ron switches default state and initializes the I2C bus state machine Channel selection via I2C bus with no channels selected. The pass gates of the Power-up with all multiplexer channels deselected multiplexer are constructed such that the VCC pin can Capacitance isolation when channel disabled be used to limit the maximum high voltage which will No glitch on power-up be passed by the PI4MSD5V9544A. This allows the use Supports hot insertion of different bus voltages on each SCx/SDx pair, so that 5 V tolerant inputs 1.2V,1.8 V, 2.5 V or 3.3 V parts can communicate with 0 Hz to 400 kHz clock frequency 5 V parts without any additional protection. ESD protection exceeds 8000 V HBM per JESD22- External pull-up resistors pull the bus up to the A114, and 1000 V CDM per JESD22-C101 desired voltage level for each channel. All I/O pins are 5 Latch-up testing is done to JEDEC Standard V tolerant. JESD78 which exceeds 100 mA Packages offered: TSSOP-20L Pin Description Description Pin Pin Type Description The PI4MSD5V9544A is a 1-of-4 bidirectional No Name translating multiplexer, controlled via the I2C bus. Input address input 0 1 A0 The SCL/SDA upstream pair fans out to four Input address input 1 2 A1 SCx/SDx downstream pairs, or channels. address input 2 3 A2 Input active LOW interrupt input 0 4 Input INT0 5 SD0 I/O serial data 0 I/O serial clock 0 Pin Configuration 6 SC0 7 Input active LOW interrupt input 1 INT1 8 SD1 I/O serial data 1 serial clock 1 9 SC1 I/O Ground supply ground 10 GND 11 Input active LOW interrupt input 2 INT2 12 SD2 I/O serial data 2 serial clock 2 TSSOP20 I/O 13 SC2 14 Input active LOW interrupt input 3 INT3 15 SD3 I/O serial data 3 serial clock 3 16 SC3 I/O Output 17 active LOW interrupt output INT 18 SCL I/O serial clock line serial data line 19 SDA I/O Power 20 VCC Power supply 2015-07-0035 PT0525-4 8/18/15 1 PI4MSD5V9544A 4 Channel I2C/SMBus 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 2015-07-0035 PT0525-4 8/18/15 2