PCA9546ABS
I2C Switch / MultiplexerThe PCA9546ABS is a i2c switch / multiplexer from NXP Semiconductors. View the full PCA9546ABS datasheet below including key specifications.
PCA9546ABS shares its datasheet with PCA9546AD, whose page lists every part number it covers.
Official PCA9546ABS datasheet (PDF) — the source this page was extracted from.
PCA9546ABS Key Specifications
| Parameter | Value |
|---|---|
| Channels | 4 bidirectional translating switches |
| 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 |
| Package Dimensions | 4 x 4 x 0.85 mm |
| Voltage Translation | 1.8 V, 2.5 V, 3.3 V and 5 V buses |
| Latch-Up Performance | exceeds 100 mA per JESD78 |
| Supply Voltage Range | 2.3V to 5.5V |
| Operating Temperature Range | -40°C to +85°C |
PCA9546ABS 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)
PCA9546ABS 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 |
PCA9546ABS 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) |
| PCA9546AD | NXP Semiconductors | SO16 |
| PCA9546APW | NXP Semiconductors | TSSOP-16 |
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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