PCA9546AD
I2C Switch / MultiplexerThe PCA9546AD is a i2c switch / multiplexer from NXP Semiconductors. View the full PCA9546AD datasheet below including key specifications.
Official PCA9546AD datasheet (PDF) — the source this page was extracted from.
PCA9546AD Key Specifications
| Parameter | Value |
|---|---|
| Interface | I2C-bus / SMBus compatible |
| Address Pins | 3 (A0, A1, A2), up to 8 devices on bus |
| I/O Tolerance | 5 V tolerant |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM |
| Clock Frequency | 0 Hz to 400 kHz |
| Number Of Channels | 4 (1-of-4 bidirectional translating switches) |
| Package Body Width | 3.9 mm |
| 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 |
PCA9546AD 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)
PCA9546AD 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 |
PCA9546AD 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 |
| PCA9546APW | NXP Semiconductors | TSSOP-16 |
Other Switches
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- 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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