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PCA9546ADW

4-Channel I2C Bus Switch

The PCA9546ADW is a 4-channel i2c bus switch from NXP Semiconductors. View the full PCA9546ADW datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Official PCA9546ADW datasheet (PDF) — the source this page was extracted from.

Manufacturer

NXP Semiconductors

Category

Interface ICs

Package

SOIC-16

PCA9546ADW Key Specifications

ParameterValue
Number Of Channels4 (1-of-4 bidirectional translating switches)
Device Address Pins3 (A2-A0), up to 8 devices on bus
I2C Clock Frequency0 to 400 kHz
ESD Protection (HBM)2000V
Supply Voltage Range2.3V to 5.5V
Standby Supply Current0.1 µA to 1 µA
Communication InterfaceI2C / SMBus
Input Voltage Tolerance5.5V tolerant I/O
Storage Temperature Range-65°C to 150°C
Operating Temperature Range-40°C to 85°C
Switch On-State Resistance (RON)4 Ω to 16 Ω typ (VCC 4.5V to 5.5V, IO=15mA)
Thermal Resistance (θJA, DW Package)57 °C/W

PCA9546ADW Overview

Part: PCA9546A — Texas Instruments

Type: Quad Bidirectional Translating I2C Bus Switch

Description: A quad bidirectional translating switch controlled via the I2C bus, allowing voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses, with an operating power-supply voltage range of 2.3 V to 5.5 V and supporting 0 to 400-kHz clock frequency.

Operating Conditions:

  • Supply voltage: 2.3 V to 5.5 V
  • Operating temperature: -40 to 85 °C
  • I2C clock frequency: 0 to 400 kHz

Absolute Maximum Ratings:

  • Max supply voltage: 7 V
  • Max continuous current through VCC/GND: ±100 mA
  • Max junction/storage temperature: 150 °C

Key Specs:

  • Power-on reset voltage (VPOR): 1.9 V (min) to 2.1 V (max) at VCC = 3.3 V
  • Switch on-state resistance (RON): 7 Ω (typ) to 16 Ω (max) at VCC = 2.3 V to 2.7 V, IO = 10 mA
  • IOL SCL, SDA: 3 mA (min) to 7 mA (typ) at VCC = 2.3 V to 5.5 V, VOL = 0.4 V
  • Operating supply current (ICC): 3 μA (typ) to 12 μA (max) at VCC = 5.5 V, fSCL = 100 kHz
  • Standby supply current (ICC): 0.3 μA (typ) to 1 μA (max) at VCC = 5.5 V
  • I2C clock frequency (fSCL): 0 to 400 kHz (Fast Mode)
  • I2C bus capacitive load (Cb): 400 pF (max)

Features:

  • 1-of-4 Bidirectional Translating Switches
  • I2C Bus and SMBus Compatible
  • Active-Low Reset Input
  • Three Address Pins, Allowing up to Eight Devices on the I2C Bus
  • Channel Selection Via I2C Bus
  • 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
  • 5.5-V Tolerant Inputs

Applications:

Package:

  • QFN - RGV
  • QFN - RGY
  • SOIC - DW
  • TSSOP - PW
  • TVSOP - DGV

PCA9546ADW Features

  • 1-of-4 Bidirectional Translating Switches
  • I 2 C Bus and SMBus Compatible
  • Active-Low Reset Input
  • Three Address Pins, Allowing up to Eight Devices on the I 2 C Bus
  • Channel Selection Via I 2 C Bus
  • Power Up With All Switch Channels Deselected
  • Low R ON Switches
  • Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
  • No Glitch on Power Up

PCA9546ADW Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETERTEST CONDITIONSTEST CONDITIONSV CCMINTYP (1)MAXUNIT
V POR Power-on reset voltage (2)V POR Power-on reset voltage (2)
voltage		No load,V I = V CC or GNDV POR
5 V
4.5 V to 5.5 V
3.3 V		3.6
2.6
1.9		1.62.1
4.5		V
V
V pass SwitchV pass SwitchV SWin = V CC ,I SWout = -100 μ A3 V to 3.6 V
2.5 V
2.3 V to 2.7 V		1.6
1.1		1.52.8
2
V OL = 0.4 V2.3 V to 5.5 V37mA
I OL SCL, SDAI OL SCL, SDAV OL = 0.6 V2.3 V to 5.5 V610mA
SCL, SDASCL, SDAV I = V CC or GND± 1
SC3-SC0, SD3-SD0SC3-SC0, SD3-SD0± 1
I I A2-A0I I A2-A02.3 V to 5.5 V± 1μ A
RESETRESET± 1
f SCL = 100 kHzV I = V CC or GND,= 05.5 V312
OperatingOperatingI O3.6 V
2.7 V
5.5 V		33
0.3		11
10
1
I CCLow inputsV I = GND,I O = 03.6 V
2.7 V		0.1
0.1		1
1		μ A
StandbyStandby5.5 V0.31
High inputsV I = V CC ,
SCL or SDA input at 0.6		I O = 0
V,		3.6 V
2.7 V		0.1
0.1
8		151
1
Supply-current ∆ ISCL, SDAOther inputs at CCV or GNDμ A
CC changeCC changeSCL or SDA input at V CC - 0.6 V, Other inputs at V or GND
CC		SCL or SDA input at V CC - 0.6 V, Other inputs at V or GND2.3 V to 5.5 V8
4.5		156
A2-A0 C iA2-A0 C iV I = V CC or GND2.3 V to 5.5 V4.5
15		5.5
19		pF
SCL, SDASCL, SDAV I = V CC or GND,Switch OFF2.3 V to 5.5 VpF
C io(OFF) (3) SC3-SC0,SD3-SD068
I = 15 mA4.5 V to 5.5 V4916Ω
R ON Switch on-stateresistanceV O = 0.4 V,O3 V to 3.6 V51120 45
V O = 0.4
V,		I = 10 mA
O		2.3 V to 2.7 V716

SCPS148A-OCTOBER 2005-REVISED DECEMBER 2005

PCA9546ADW Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

MINMAXUNIT
V CCSupply voltage rangeSupply voltage range-0.57V
V IInput voltage range (2)Input voltage range (2)-0.57V
I IInput currentInput current± 20mA
I OOutput currentOutput current± 25mA
Continuous current through V CCContinuous current through V CC± 100mA
Continuous current through GNDContinuous current through GND± 100mA
θ JADGV package120° C/W
DW package57° C/W
PackagePW package108° C/W
RGV packageTBD° C/W
RGY package50° C/W
P totTotal power dissipationTotal power dissipation400mW
T stgStorage temperature rangeStorage temperature range-65150° C
T AOperating free-air temperature rangeOperating free-air temperature range-4085° C

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

  • (2) The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.

(3) The package thermal impedance is calculated in accordance with JESD 51-7.

PCA9546ADW Recommended Operating Conditions

MIN MAXUNIT
V CCSupply voltage2.35.5V
V IHHigh-level input voltageSCL, SDA0.7 × V CC6V
A2-A0, RESET0.7 × V CCV CC + 0.5V
V ILLow-level input voltageSCL, SDA-0.50.3 × V CCV
V ILLow-level input voltageA2-A0, RESET-0.50.3 × V CCV
T AOperating free-air temperature-4085° C

PCA9546ADW Typical Application

Figure 12 shows an application in which the PCA9546A can be used.

  • A. Pin numbers shown are for the DGV, DW, PW, and RGY packages.

Figure 12. Typical Application

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 NumberManufacturerPackage
PCA9546ANXP SemiconductorsTVSOP (DGV)
PCA9546ADGVRNXP SemiconductorsTVSOP-16
PCA9546ADGVTNXP SemiconductorsTVSOP-16
PCA9546ADWRNXP SemiconductorsSOIC-16
PCA9546ADWTNXP SemiconductorsSOIC-16
PCA9546AGQNRNXP Semiconductors—
PCA9546APWNXP SemiconductorsTSSOP-16
PCA9546APWE4NXP SemiconductorsTVSOP
PCA9546APWRNXP SemiconductorsTSSOP-16
PCA9546APWTNXP SemiconductorsTSSOP-16
PCA9546ARGWRNXP SemiconductorsQFN-20
PCA9546ARGYRNXP SemiconductorsQFN-16
PCA9546ARVRNXP Semiconductors—
PCA9546AZQNRNXP Semiconductors—

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All Interface ICs datasheetsAll NXP Semiconductors datasheets (189)

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