TCA9548APW Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The TCA9548APW is a low-voltage 8-channel I2C bus switch from Texas Instruments with integrated reset in a 24-pin TSSOP package. It supports up to 8 separate I2C downstream channels with 70 ohm maximum on-state resistance and operates from 1.8V to 5.5V. In stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- TCA9548APW Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TCA9548APW?
- 8 independently selectable I2C channels resolve address conflicts between identical sensors on a single master bus
- Low 70 ohm maximum on-state resistance minimizes bus capacitance impact at Fast-Mode Plus 1 MHz I2C speeds
- Active-low reset pin allows hardware recovery from a bus lockup condition without power cycling the system
- Wide 1.8V to 5.5V supply range enables mixed-voltage system integration between 1.8V MCUs and 5V legacy peripherals
What is TCA9548APW used for?
The TCA9548APW solves I2C address conflicts in systems with multiple identical sensors, such as multi-axis IMU arrays, multi-zone temperature monitor networks, and modular display driver stacks. It is commonly deployed in server DIMM power management buses, where up to 8 memory slots share the same SMBUS I2C addresses. The 24-pin TSSOP package fits standard PCB libraries and enables dense multi-channel layouts in rack-mount industrial controllers.
What are the specifications of TCA9548APW?
| YTEOL | 0 |
| Analog IC - Other Type | SINGLE-ENDED MULTIPLEXER |
| JESD-30 Code | R-PDSO-G24 |
| Normal Position | NO/NC |
| Number of Channels | 8 |
| Number of Functions | 2 |
| On-state Resistance-Max (Ron) | 70Ω |
| Output | SEPARATE OUTPUT |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP24,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Supply Current-Max (Isup) | 0.08mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.65V |
| Supply Voltage-Nom (Vsup) | 2.5V |
| Surface Mount | YES |
| Switching | BREAK-BEFORE-MAKE |
| Technology | CMOS |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the TCA9548APW datasheet?
TCA9548APW Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TCA9548APW?
Compatible alternatives and drop-in replacements for TCA9548APW:
suggested
suggested
suggested
suggested
suggested
suggested
suggested
Frequently Asked Questions
How does the TCA9548APW resolve I2C address conflicts when multiple identical sensors share a bus?
The TCA9548APW connects only one of its 8 downstream channel ports to the master at a time, isolating the other 7. Since each channel is electrically separated, you can connect up to 8 sensors with the same 7-bit I2C address across different channels. The switch itself is selected via a 3-bit address (A0–A2), allowing up to 8 TCA9548APW devices on one master bus for 64 isolated sensor channels total.
At what I2C speed does the TCA9548APW operate, and does the 70 ohm on-resistance limit Fast-Mode Plus performance?
The TCA9548APW supports Standard Mode (100 kHz), Fast Mode (400 kHz), and Fast-Mode Plus (1 MHz) I2C. The 70 ohm maximum on-resistance adds to the bus pull-up circuit but remains within Fast-Mode Plus timing budgets when combined with a 1 kohm pull-up to 3.3V, keeping rise times below 120 ns as required by the I2C specification.
How can the TCA9548APW's hardware reset pin recover a frozen I2C bus without rebooting the host processor?
Asserting the active-low RESET pin for at least 500 ns clears all channel selections and disconnects all 8 downstream ports, releasing SDA and SCL lines that may be stuck low due to a peripheral NAK or clock-stretch lockup. The host GPIO then de-asserts RESET and re-selects the desired channel, restoring normal I2C communication in less than 1 µs without a full system power cycle.
Can TCA9548APW directly interface a 1.8V MCU with 5V I2C peripherals on downstream channels?
Yes. The TCA9548APW operates from 1.8V to 5.5V supply, and each downstream channel's I/O is referenced to VCC independently. By powering the upstream side at 1.8V and downstream channels at 5V through separate pull-up resistors, it acts as a voltage-level translator for I2C signals between a 1.8V MCU and 5V peripherals across all 8 channels, avoiding external level-shifter ICs.
Related Guides
LM5156QDSSRQ1 Automotive Boost Controller Design Guide
Practical LM5156QDSSRQ1 automotive boost design guidance covering operating points, magnetics, MOSFET stress, compensation, layout, and validation.
Jul 24, 2026
EEEFK1H470XP Selection Guide: Choosing a 50 V SMD Aluminum Capacitor
Choose EEEFK1H470XP and related 50 V SMD aluminum capacitors by capacitance, ripple current, ESR, life, and layout constraints.
Jul 24, 2026
LM5156QDSSRQ1 Automotive Boost Controller Selection Guide
Select LM5156QDSSRQ1 for automotive boost, SEPIC, or flyback designs using practical current, thermal, EMI, and sourcing criteria.
Jul 23, 2026
EEEFK1H470XP 50 V SMD Capacitor Decoupling Design Guide
Design EEEFK1H470XP into 12 V and 24 V rails with practical voltage margin, ripple, lifetime, layout, and mixed-capacitor checks.
Jul 23, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit