PCA9546AD

Part: PCA9546A, NXP B.V.

Type: 4-channel I2C-bus switch with reset

Description: The PCA9546A is a quad bidirectional translating switch controlled via the I2C-bus, offering 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: ±100 mA (supply current)
• Max junction/storage temperature: +150 °C

Key Specs:

• Operating supply voltage: 2.3 V to 5.5 V
• ON-state resistance (Ron): 9 Ω typ (VDD = 4.5 V to 5.5 V, VO = 0.4 V, IO = 15 mA)
• Operating supply current (IDD): 65 μA typ (VDD = 5.5 V, fSCL = 100 kHz)
• Standby current (Istb): 0.3 μA typ (VDD = 5.5 V)
• Switch output voltage (Vo(sw)): 2.6 V to 4.5 V (VDD = 4.5 V to 5.5 V, Io(sw) = -100 μA)
• LOW-level output current (IOL): 6 mA min (VOL = 0.6 V)
• Max clock frequency: 400 kHz
• Input capacitance (Ci, select inputs): 12 pF typ

Features:

• 1-of-4 bidirectional translating switches
• I2C-bus interface logic; compatible with SMBus standards
• Active LOW reset input
• Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
• 3 address pins allowing up to 8 devices on the I2C-bus
• Power-up with all switch channels deselected

Applications:

Package:

• HVQFN16 (16 terminals; body 4 × 4 × 0.85 mm)
• SO16 (16 leads; body width 3.9 mm)
• TSSOP16 (16 leads; body width 4.4 mm)

• 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, 200 V MM per JESD22-A115, 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

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 needs to be soldered to the board using a corresponding thermal pad on the board, and for proper heat conduction through the board thermal vias need to be incorporated in the PCB in the thermal pad region.

SO16: plastic small outline package; 16 leads; body width 3.9 mm

SOT109-1

Note

1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.

Fig 18. Package outline SOT109-1 (SO16)

© NXP B.V. 2009. All rights reserved.

PCA9546A NXP Semiconductors

4-channel I²C-bus switch with reset

TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm

SOT403-1

• 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
• 1. Plastic interlead protrusions of 0.25 mm maximum per side are not included.

Fig 19. Package outline SOT403-1 (TSSOP16)

© NXP B.V. 2009. All rights reserved.

4-channel I²C-bus switch with reset

HVQFN16: plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 4 × 4 × 0.85 mm

SOT629-1

Fig 20. Package outline SOT629-1 (HVQFN16)

CA9546A_5 © NXP B.V. 2009. All rights reserved.

4-channel I2C-bus switch with reset