PCA9546A

Part: PCA9546A

Type: 4-channel I2C-bus switch with reset

Description: Quad bidirectional translating switch controlled via I2C-bus, supporting 4 channels, active LOW reset, and voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses.

Operating Conditions:

• Supply voltage: 2.3 V to 5.5 V
• Operating temperature: -40 °C to +85 °C
• Max clock frequency: 400 kHz

Absolute Maximum Ratings:

• Max supply voltage: +7.0 V
• Max continuous current: 25 mA (output current)
• Max junction temperature: 125 °C

Key Specs:

• Operating supply voltage: 2.3 V to 5.5 V
• Operating supply current: 16 μA Typ, 50 μA Max (at VDD = 3.6 V, fSCL = 100 kHz)
• Standby current: 0.1 μA Typ, 1 μA Max (at VDD = 3.6 V)
• ON-state resistance: 11 Ω Typ, 30 Ω Max (at VDD = 3.6 V, VO = 0.4 V, IO = 15 mA)
• LOW-level output current: 3 mA Min (at VOL = 0.4 V)
• Input capacitance (SCL/SDA): 12 pF Typ, 13 pF Max
• Power-on reset voltage: 1.6 V Typ, 2.1 V Max
• Clock frequency: 0 Hz to 400 kHz

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
• 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

Package:

• HVQFN16
• SO16
• TSSOP16

• 1-of-4 bidirectional translating switches
• I 2 C-bus interface logic; compatible with SMBus standards
• Active LOW reset input
• 3 address pins allowing up to 8 devices on the I 2 C-bus
• Channel selection via I 2 C-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

Product data sheet

Table 3. Pin description

[1] HVQFN16 package die supply ground is connected to both the VSS pin and the exposed center pad. The VSS pin must be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board-level performance, the exposed pad must be soldered to the board using a corresponding thermal pad on the board, and for proper heat conduction through the board thermal vias must be incorporated in the PCB in the thermal pad region.

4-channel I 2 C-bus switch with reset

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