TCA9548AMRGER
The TCA9548AMRGER is an electronic component from Texas Instruments. View the full TCA9548AMRGER datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Overview
Part: TCA9548A from Texas Instruments
Type: 8-Channel I2C Switch with Reset
Description: The TCA9548A is an 8-channel bidirectional translating I2C switch with an active-low reset input, supporting voltage-level translation between 1.8V, 2.5V, 3.3V, and 5V buses, and operating from 1.65V to 5.5V with up to 400kHz clock frequency.
Operating Conditions:
- Supply voltage: 1.65 V to 5.5 V
- Operating temperature: -40 to +125 °C (for 1.65 V ≤ VCC ≤ 3.6 V)
- I2C clock frequency: 0 to 400 kHz
Absolute Maximum Ratings:
- Max supply voltage: 7 V
- Max output current: -25 mA
- Max storage temperature: 150 °C
- Max junction temperature: 130 °C (VCC ≤ 3.6 V), 90 °C (VCC ≤ 5.5 V)
Key Specs:
- Switch-on resistance (RON): 10 Ω (Typ, VCC = 4.5 V to 5.5 V, IO = 15 mA)
- Switch-on resistance (RON): 25 Ω (Typ, VCC = 1.65 V to 1.95 V, IO = 10 mA)
- Output current (IOL): 6 mA (Min, VCC = 1.65 V to 5.5 V, VOL = 0.6 V)
- Supply current (ICC) in operating mode: 30 μA (Max, VCC = 5.5 V, fSCL = 400 kHz)
- Supply current (ICC) in standby mode: 2 μA (Max, VCC = 5.5 V, -40 °C ≤ TA ≤ 85 °C)
- I2C bus capacitive load (Cb): 400 pF (Max)
- I2C clock high time (tSCH): 0.6 μs (Min, Fast Mode)
- I2C clock low time (tSCL): 1.3 μs (Min, Fast Mode)
Features:
- 1-to-8 Bidirectional translating switches
- I2C Bus and SMBus compatible
- Active-low reset input
- Three address pins, allowing up to eight TCA9548A devices on the I2C bus
- Channel selection through an I2C Bus, in any combination
- Allows voltage-level translation between 1.8V, 2.5V, 3.3V, and 5V buses
- 5-V Tolerant inputs
- 0 to 400kHz Clock frequency
Applications:
- Servers
- Routers (telecom switching equipment)
- Factory Automation
- Products with I2C target address conflicts (such as multiple, identical temperature sensors)
Package:
- PW (TSSOP, 24)
- RGE (VQFN, 24)
- DGS (VSSOP, 24)
Features
- 1-to-8 Bidirectional translating switches
- I 2 C Bus and SMBus compatible
- Active-low reset input
- Three address pins, allowing up to eight TCA9548A devices on the I 2 C bus
- Channel selection through an I 2 C Bus, in any combination
- Power up with all switch channels deselected
- Low RON switches
- Allows voltage-level translation between 1.8V, 2.5V, 3.3V, and 5V buses
- No glitch on power up
- Supports hot insertion
- Low standby current
- Operating power-supply voltage range of 1.65V to 5.5V
- 5-V Tolerant inputs
- 0 to 400kHz Clock frequency
- Latch-up performance exceeds 100mA Per JESD 78, class II
- ESD Protection exceeds JESD 22
- -±2000V Human-body model (A114-A)
- -200V Machine model (A115-A)
- -±1000V Charged-device model (C101)
Applications
- Servers
- Routers (telecom switching equipment)
- Factory Automation
- Products with I 2 C target address conflicts (such as multiple, identical temperature sensors)
SCPS207H - MAY 2012 - REVISED SEPTEMBER 2024
Pin Configuration
Not to scale
Figure 4-1. PW, DGS Package, 24-Pin TSSOP, VSSOP (Top View)
Table 4-1. Pin Functions
| PIN | PIN | PIN | TYPE |
|---|---|---|---|
| NAME | TSSOP, VSSOP (PW, DGS) | VQFN (RGE) | TYPE |
| A0 | 1 | 22 | I |
| A1 | 2 | 23 | I |
| A2 | 21 | 18 | I |
| GND | 12 | 9 | - |
| RESET | 3 | 24 | I |
| SD0 | 4 | 1 | I/O |
| SC0 | 5 | 2 | I/O |
| SD1 | 6 | 3 | I/O |
| SC1 | 7 | 4 | I/O |
| SD2 | 8 | 5 | I/O |
| SC2 | 9 | 6 | I/O |
| SD3 | 10 | 7 | I/O |
| SC3 | 11 | 8 | I/O |
| SD4 | 13 | 10 | I/O |
| SC4 | 14 | 11 | I/O |
| SD5 | 15 | 12 | I/O |
| SC5 | 16 | 13 | I/O |
| SD6 | 17 | 14 | I/O |
| SC6 | 18 | 15 | I/O |
| SD7 | 19 | 16 | I/O |
| SC7 | 20 | 17 | I/O |
| SCL | 22 | 19 | I/O |
| SDA | 23 | 20 | I/O |
| VCC | 24 | 21 | Power |
Table 4-1. Pin Functions
Figure 4-2. RGE Package, 24-Pin VQFN (Top View)
Electrical Characteristics
VCC = 1.65 V to 5.5 V, over recommended operating free-air temperature ranges supported by Recommended Operating Conditions (unless otherwise noted) (1)
| PARAMETER | TEST CONDITIONS | V CC | MIN | MAX | UNIT | |
|---|---|---|---|---|---|---|
| V PORR | Power-on reset voltage, V CC rising | No load, V I = V CC or GND (3) | 1.5 | V | ||
| V PORF | Power-on reset voltage, V CC falling (4) | No load, V I = V CC or GND (3) | 5 V 4.5 V to 5.5 V 3.3 V | 0.8 2.6 | 4.5 | V |
| V | 3 V to 3.6 V | 1.6 | 2.8 | V | ||
| o(sw) | Switch output voltage | V i(sw) = V CC , I SWout = -100 μA | 2.5 V 2.3 V to 2.7 V 1.8 V 1.65 V to 1.95 V | 1.1 0.6 | 2 1.25 | |
| I OL | V OL = 0.4 V | 3 | mA | |||
| SDA | V OL = 0.6 V | 1.65 V to 5.5 V | 6 | |||
| I | SCL, SDA | SCL, SDA | -1 | 1 | ||
| SC7-SC0, SD7-SD0 | SC7-SC0, SD7-SD0 | -1 | 1 | |||
| I | A2-A0 RESET f SCL Operating mode | A2-A0 RESET (3) V I = V CC or GND , I O = 0 (3) | 1.65 V to 5.5 V 5.5 V 3.6 V 2.7 V 1.65 V 5.5 V 3.6 V | -1 -1 | 1 1 80 35 20 10 30 15 | μA |
| f SCL | V I = V CC or GND , I O = 0 | 2.7 V 1.65 V 5.5 V | 8 4 2 | μA | ||
| I CC | Low Standby mode | V I = GND (3) , I O = 0, -40 °C ≤ TA ≤ 85 °C | 3.6 V 2.7 V 1.65 V 5.5 V 3.6 V | 2 1 1 2 2 | ||
| High | V I = V CC , I O = 0, -40 °C ≤ TA ≤ 85 °C | 2.7 V 1.65 V 3.6 V | 1 1 2 | μA | ||
| Low | Vi = Vcc or GND, Io = 0, 85 °C < TA ≤ 125 °C | 2.7 V 1.65 V | 1.5 1 | μA μA | ||
| ΔI CC | Supply-current change SCL, | SCL or SDA input at 0.6 V, Other inputs at V CC or GND (3) SCL or SDA input at V CC - 0.6 V, Other inputs at V CC or GND (3) | 1.65 V to 5.5 V | 20 20 | μA | |
| A2-A0 | V I = V CC or GND (3) | 5 5 | pF | |||
| C i | RESET SCL | V I = V CC or GND (3) , Switch OFF | 1.65 V to 5.5 V | 28 | ||
| C io(off) (5) | SDA SC7-SC0, SD7-SD0 | V I = V CC or GND (3) , Switch OFF | 1.65 V to 5.5 V | 28 7.5 | pF |
VCC = 1.65 V to 5.5 V, over recommended operating free-air temperature ranges supported by Recommended Operating Conditions (unless otherwise noted) (1)
| PARAMETER | PARAMETER | TEST CONDITIONS | V CC | MIN | TYP (2) | MAX | UNIT |
|---|---|---|---|---|---|---|---|
| R ON | Switch-on resistance | V O = 0.4 V, I O = 15 mA | 4.5 V to 5.5 V | 4 | 10 | 20 | Ω |
| R ON | Switch-on resistance | V O = 0.4 V, I O = 15 mA | 3 V to 3.6 V | 5 | 12 | 30 | Ω |
| R ON | Switch-on resistance | V O = 0.4 V, I O = 10 mA | 2.3 V to 2.7 V | 7 | 15 | 45 | Ω |
| R ON | Switch-on resistance | V O = 0.4 V, I O = 10 mA | 1.65 V to 1.95 V | 10 | 25 | 70 | Ω |
- (1) For operation between specified voltage ranges, refer to the worst-case parameter in both applicable ranges
- (2) All typical values are at nominal supply voltage (1.8-, 2.5-,3.3-, or 5-V V CC), T A = 25°C
- (3) RESET = VCC (held high) when all other input voltages, VI = GND.
- (4) The power-on reset circuit resets the I 2 C bus logic with V CC < VPORF
- (5) Cio(ON) depends on internal capacitance and external capacitance added to the SCn lines when channels(s) are ON.
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| V CC | Supply voltage | Supply voltage | -0.5 | 7 | V |
| V I | Input voltage (2) | Input voltage (2) | -0.5 | 7 | V |
| I I | Input current | Input current | -20 | 20 | mA |
| I O | Output current | Output current | -25 | mA | |
| I CC | Supply current | Supply current | -100 | 100 | mA |
| T stg | Storage temperature | Storage temperature | -65 | 150 | °C |
| T J | V CC ≤ 3.6 V | 130 | °C | ||
| T J | V CC ≤ 5.5 V | 90 | °C |
Recommended Operating Conditions
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| V CC | Supply voltage | -40 °C ≤ T A ≤ 85 °C | 1.65 | 5.5 | V |
| V CC | 85 °C < T A ≤ 125 °C | 1.65 | 3.6 | V | |
| V IH | High-level input voltage | SCL, SDA | 0.7 × V CC | 6 | V |
| V IH | A2-A0, RESET | 0.7 × V CC | V CC + 0.5 | V | |
| V IL | Low-level input voltage | SCL, SDA | -0.5 | 0.3 × V CC | V |
| V IL | A2-A0, RESET | -0.5 | 0.3 × V CC | V | |
| T A | Operating free-air temperature | 3.6 V < V CC ≤ 5.5 V | -40 | 85 | °C |
| T A | 1.65 V ≤ V CC ≤ 3.6 V | -40 | 125 | °C |
Thermal Information
| TCA9548A | TCA9548A | TCA9548A | ||
|---|---|---|---|---|
| THERMAL METRIC (1) | THERMAL METRIC (1) | PW (TSSOP) | RGE (VQFN) | DGS (VSSOP) |
| 24 PINS | 24 PINS | 24 PINS | ||
| R θJA | Junction-to-ambient thermal resistance | 108.8 | 57.2 | 86.1 |
| R θJC(top) | Junction-to-case (top) thermal resistance | 54.1 | 62.5 | 34.3 |
| R θJB | Junction-to-board thermal resistance | 62.7 | 34.4 | 47.3 |
| ψ JT | Junction-to-top characterization parameter | 10.9 | 3.8 | 1.5 |
| ψ JB | Junction-to-board characterization parameter | 62.3 | 34.4 | 47.0 |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | 15.5 | N/A |
Typical Application
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TCA9548A | Texas Instruments | — |
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| TCA9548ARGERG4 | Texas Instruments | — |
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