Part: PCA9546A

Type: 4-channel I2C-bus switch with reset

Key Specs:

• Operating power supply voltage range: 2.3 V to 5.5 V
• Clock frequency: 0 Hz to 400 kHz
• ESD protection HBM: exceeds 2000 V
• ESD protection CDM: exceeds 1000 V
• Latch-up testing: exceeds 100 mA

Features:

• 1-of-4 bidirectional translating switches
• I2C-bus interface logic; compatible with SMBus standards
• Active LOW reset input
• 3 address pins allowing up to 8 devices on the I2C-bus
• Channel selection via I2C-bus, in any combination
• Power-up with all switch channels deselected
• Low Ron switches
• Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
• No glitch on power-up
• Supports hot insertion
• Low standby current
• 5 V tolerant Inputs

Applications:

• null

Package:

• SO16
• TSSOP16
• HVQFN16

• 1-of-4 bidirectional translating switches
• I 2C-bus interface logic; compatible with SMBus standards
• Active LOW reset input
• 3 address pins allowing up to 8 devices on the I2C-bus
• Channel selection via I2C-bus, in any combination
• Power-up with all switch channels deselected
• Low Ron switches
• Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
• No glitch on power-up
• Supports hot insertion
• Low standby current
• Operating power supply voltage range of 2.3 V to 5.5 V
• 5 V tolerant Inputs
• 0 Hz to 400 kHz clock frequency
• ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
• Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
• Three packages offered: SO16, TSSOP16, and HVQFN16

4-channel I2C-bus switch with reset

PCA9546A TVSOP (DGV) Pinout

Notes

• 16-pin TVSOP (DGV) package as specified in the ordering information table
• Address pins (A0–A2): Must be pulled high or low via external resistors; no internal pullups
• RESET pin: Must be connected to VCC through a pullup resistor; active-low signal
• All I/O pins are 5.5-V tolerant
• Voltage translation: VCC voltage limits maximum pass-through voltage; allows 1.8-V, 2.5-V, 3.3-V, and 5-V bus compatibility
• Channel selection: Any combination of four channels (0–3) can be selected via I²C control register; channels become active after a stop condition on the I²C bus

| Table 6.
Thermal characteristics | | :------- | :-------------------------------------- | :---------------- | :-- | :---- | | Symbol | Parameter | Conditions | Typ | Unit | | Rth(j-a) | thermal resistance from junction to ambient | HVQFN16 package | 40 | °C/W | | | | SO16 package | 115 | °C/W | | | | TSSOP16 package | 160 | °C/W |

4-channel I2C-bus switch with reset