PCA9546APW
I2C Switch / MultiplexerThe PCA9546APW is a i2c switch / multiplexer from NXP Semiconductors. View the full PCA9546APW datasheet below including key specifications.
PCA9546APW shares its datasheet with PCA9546AD, whose page lists every part number it covers.
Official PCA9546APW datasheet (PDF) — the source this page was extracted from.
PCA9546APW Key Specifications
| Parameter | Value |
|---|---|
| Interface | I2C-bus / SMBus compatible |
| I/O Tolerance | 5 V tolerant |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM |
| Device Addresses | 3 address pins, up to 8 devices on the bus |
| Number Of Channels | 4 |
| Package Body Width | 4.4 mm |
| I2C Clock Frequency | 0 Hz to 400 kHz |
| Voltage Translation | 1.8 V, 2.5 V, 3.3 V and 5 V buses |
| Latch-Up Performance | exceeds 100 mA (JESD78) |
| Supply Voltage Range | 2.3V to 5.5V |
| Operating Temperature Range | -40°C to +85°C |
PCA9546APW Overview
Part: PCA9546A
Type: Quad Bidirectional Translating I2C-bus Switch
Description: The PCA9546A is a quad bidirectional translating switch controlled via the I2C-bus, allowing an upstream SCL/SDA pair to fan out to four downstream pairs, with 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
- Clock frequency: 0 Hz to 400 kHz
Absolute Maximum Ratings:
- Max supply voltage: +7.0 V
- Max input current: -20 mA
- Max output current: -25 mA
- Max storage temperature: +150 °C
Key Specs:
- ON-state resistance (Ron): 5 Ω (typ) at VDD = 3.6 V, VO = 0.4 V, IO = 15 mA
- ON-state resistance (Ron): 9 Ω (typ) at VDD = 4.5 V to 5.5 V, VO = 0.4 V, IO = 15 mA
- Standby current (Istb): 0.1 mA (typ) at VDD = 3.6 V, no load
- Standby current (Istb): 0.3 mA (typ) at VDD = 5.5 V, no load
- Input capacitance (Ci): 12 pF (typ) for SCL/SDA inputs
- Input/output capacitance (Cio): 3 pF (typ) for pass gate
- Power-on reset voltage (VPOR): 1.6 V (typ) at VDD = 2.3 V to 3.6 V
- Power-on reset voltage (VPOR): 1.7 V (typ) at VDD = 4.5 V to 5.5 V
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
- Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
- 5 V tolerant Inputs
- Low standby current
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)
PCA9546APW Pin Configuration
Table 3. Pin description
| Symbol | Pin | Pin | Description |
|---|---|---|---|
| Symbol | SO16, TSSOP16 | HVQFN16 | Description |
| A0 | 1 | 15 | address input 0 |
| A1 | 2 | 16 | address input 1 |
| RESET | 3 | 1 | active LOW reset input |
| SD0 | 4 | 2 | serial data 0 |
| SC0 | 5 | 3 | serial clock 0 |
| SD1 | 6 | 4 | serial data 1 |
| SC1 | 7 | 5 | serial clock 1 |
| V SS | 8 | 6 [1] | supply ground |
| SD2 | 9 | 7 | serial data 2 |
| SC2 | 10 | 8 | serial clock 2 |
| SD3 | 11 | 9 | serial data 3 |
| SC3 | 12 | 10 | serial clock 3 |
| A2 | 13 | 11 | address input 2 |
| SCL | 14 | 12 | serial clock line |
| SDA | 15 | 13 | serial data line |
| V DD | 16 | 14 | supply voltage |
PCA9546APW Package Information
| UNIT | A max. | A 1 | A 2 | A 3 | b p | c | D (1) | E (1) | e | H E | L | L p | Q | v | w | y | (1) Z | q |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 1.75 | 0.25 0.10 | 1.45 1.25 | 0.25 | 0.49 0.36 | 0.25 0.19 | 10.0 9.8 | 4.0 3.8 | 1.27 | 6.2 5.8 | 1.05 | 1.0 0.4 | 0.7 0.6 | 0.25 | 0.25 | 0.1 | 0.7 0.3 | 8 o |
| inches | 0.069 | 0.010 0.004 | 0.057 0.049 | 0.01 | 0.019 0.014 | 0.0100 0.0075 | 0.39 0.38 | 0.16 0.15 | 0.05 | 0.244 0.228 | 0.041 | 0.039 0.016 | 0.028 0.020 | 0.01 | 0.01 | 0.004 | 0.028 0.012 | 0 o |
| OUTLINE VERSION | REFERENCES | REFERENCES | REFERENCES | EUROPEAN PROJECTION | ISSUE DATE |
|---|---|---|---|---|---|
| OUTLINE VERSION | IEC | JEDEC | JEITA | ||
| SOT109-1 | 076E07 | MS-012 | 99-12-27 03-02-19 |
Fig 18. Package outline SOT109-1 (SO16)
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| PCA9546A | NXP Semiconductors | TVSOP (DGV) |
| PCA9546ABS | NXP Semiconductors | HVQFN-16 4x4mm |
| PCA9546AD | NXP Semiconductors | SO16 |
Other Switches
- 1N4148 – onsemi, Switching Diode
- 1N4148W – Rectron, Surface-Mount Fast Switching Diode
- 1N4148WQ – Rectron, Surface-Mount Fast Switching Diode
- 1N4148WQ-13-F – Rectron, Surface-Mount Fast Switching Diode
- 1N4148WQ-7-F – Rectron, Surface-Mount Fast Switching Diode
- A3144 – Allegro MicroSystems, Sensitive Hall-Effect Switch
- BAV16W – Rectron, Surface-Mount Fast Switching Diode
- BAV16W/1N4148W – Diodes Incorporated, Surface-Mount Fast Switching Diode
All Switches datasheetsAll NXP Semiconductors datasheets (189)
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