My Inquiry
My Account
Texas Instruments TCA9548ARGERQ1
- Part No.:
- TCA9548ARGERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TCA9548ARGERQ1.pdf
- Description:
- IC BUS SWITCH 1 X 8:1 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:61,900
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TCA9548ARGERQ1 from Texas Instruments is an AEC-Q100 grade 1 automotive-qualified 8-channel bidirectional I²C bus switch with active-low reset, supporting 1.65 V to 5.25 V supply, 0–400 kHz clock operation, and voltage-level translation across 1.8 V/2.5 V/3.3 V/5 V domains. It resolves I²C target address conflicts in multi-sensor automotive infotainment systems.
For engineers reviewing the TCA9548ARGERQ1 datasheet, TCA9548ARGERQ1 pinout, TCA9548ARGERQ1 application, or TCA9548ARGERQ1 equivalent, key selection considerations include its automotive qualification, channel-selectable switching architecture, reset recovery capability, I²C/SMBus compatibility, and 5 V-tolerant inputs with low RON (≤10 Ω at 4.5–5.25 V).
Technical Context
The TCA9548ARGERQ1 implements a register-controlled 1-to-8 fanout architecture where a single upstream SCL/SDA pair routes to any combination of eight downstream SCn/SDn channels via an 8-bit control register accessed over I²C. Its internal state machine initializes all channels deselected on power-up or RESET assertion.
It features hardware-addressable device addressing (A0–A2 pins enabling up to eight devices on one bus), active-low asynchronous RESET for bus-fault recovery without power cycling, and voltage-translation capability enabled by independent pull-up references per channel (VDPU0–VDPU7) and 5 V-tolerant I/Os.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.25 V - supports mixed-voltage I²C domains including 1.8 V controllers with 5 V sensors |
| I²C Clock Frequency | 0–400 kHz - compatible with Standard-Mode (100 kHz) and Fast-Mode (400 kHz) I²C buses |
| Channel Count | 8 bidirectional translating switches - enables isolation of up to eight I²C target groups to resolve address collisions |
| On-Resistance (RON) | 4 Ω (typ) at 4.5–5.25 V - ensures minimal signal degradation and timing skew on switched I²C lines |
| Reset Input | Active-low, minimum pulse width 6 ns - provides hardware-triggered recovery from stuck-bus conditions |
| Input Tolerance | 5 V tolerant on all I/O pins - allows direct interfacing with 5 V logic regardless of VCC level |
| Quiescent Current | 0.1 µA (typ) standby at 1.65 V - enables ultra-low-power operation in always-on automotive modules |
Pinout & Package
VQFN-24 (RGE) package, 4 mm × 4 mm, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware address inputs | Set I²C slave address (70h–77h hex); enable up to eight devices on same bus without software reconfiguration |
| RESET | Active-low asynchronous reset | Forces deselection of all channels and reinitializes I²C state machine - critical for fault recovery in safety-critical buses |
| SCL / SDA | Upstream I²C bus interface | Connects to controller (e.g., MCU); requires external pull-up to VDPUM (controller-side voltage reference) |
| SC0–SC7 / SD0–SD7 | Downstream I²C channel pairs | Each pair connects to separate I²C target group; pull-ups referenced to VDPU0–VDPU7 enable per-channel voltage translation |
| VCC | Power supply | Defines logic threshold and maximum pass-through voltage; sets RON and ICC performance points |
| GND | Ground reference | Common return for all signals; must be low-impedance connection to support noise immunity in automotive environments |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for –40 °C to +125 °C ambient (at VCC ≤ 3.6 V), meeting automotive reliability and stress-test requirements |
| Functional Safety-Capable documentation | Includes FIT rate data, failure mode analysis, and diagnostic coverage guidance for ISO 26262 ASIL-B system integration |
| Hot-insertion support | Enables live replacement of downstream I²C peripherals without disrupting upstream controller or other channels |
| No glitch on power-up | Guarantees all channels remain deselected until VCC exceeds VPORR (1.2–1.5 V), preventing spurious bus activity |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II - ensures robustness against transient current injection in noisy vehicle electrical systems |
Applications
| Infotainment Systems | Body Control Modules |
|---|---|
Use Scenario: Multiple identical temperature, humidity, and touch sensors share same I²C address in center console and display assembly. IC Role / Device Role / Timing Role: I²C channel isolator resolving address conflicts while maintaining <400 kHz timing integrity across sensor clusters. Use Value: Eliminates need for software workarounds or additional MCUs; enables deterministic polling of eight sensors using single controller port. |
Use Scenario: Door module integrates window lift, mirror adjust, and seat position sensors - all requiring I²C but sharing address space. IC Role / Device Role / Timing Role: Fault-resilient bus switch with RESET-driven recovery for safety-critical actuator feedback loops. Use Value: Prevents single-point bus lockup from disabling entire door ECU; supports hot-swap diagnostics during service. |
| Factory Automation HMI | Automotive Routers |
Use Scenario: Industrial HMI panel uses multiple I²C OLED displays, EEPROMs, and ADCs with overlapping addresses on shared bus. IC Role / Device Role / Timing Role: Voltage-translating switch enabling 3.3 V MCU to communicate with 5 V display drivers and 1.8 V sensor nodes. Use Value: Removes level-shifter ICs per peripheral; reduces BOM count and layout complexity in space-constrained enclosures. |
Use Scenario: In-vehicle telecom router aggregates CAN, Ethernet, and multiple I²C-based modem/status ICs with conflicting addresses. IC Role / Device Role / Timing Role: Automotive-grade bus multiplexer providing isolated I²C paths for firmware update, diagnostics, and telemetry subsystems. Use Value: Enables concurrent secure firmware updates on modem ICs without interrupting real-time CAN/Ethernet traffic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9548APW,118 | Industrial-grade (non-automotive), no AEC-Q100 qualification; identical pinout and register map | Lacks functional safety documentation and extended temperature support; unsuitable for ASIL-B systems | Select only for non-automotive or cost-sensitive industrial designs where grade 1 qualification is unnecessary |
| TS3USB221ERSER | USB 2.0 switch (not I²C-compatible); different protocol, control interface, and timing behavior | Designed for high-speed analog signal routing, not digital bus arbitration or address resolution | Not functionally interchangeable; consider only if replacing USB signal paths, not I²C infrastructure |
Compared with PCA9548APW,118, the TCA9548ARGERQ1 adds AEC-Q100 Grade 1 compliance and functional safety documentation - essential for automotive deployment. TS3USB221ERSER serves a fundamentally different signal domain and cannot substitute for I²C bus management.
Availability
TCA9548ARGERQ1 is available at Aetrix Electronics and suitable for automotive infotainment, body control modules, and factory automation HMI requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for TCA9548ARGERQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and automotive electronics with decades of automotive qualification expertise.
The TCA9548A-Q1 product line delivers AEC-Q100-compliant I²C infrastructure solutions for automotive subsystems requiring reliable bus expansion, voltage translation, and fault recovery - targeting infotainment, ADAS, and body electronics.
FAQ
What is the operating temperature range for TCA9548ARGERQ1?
The TCA9548ARGERQ1 operates from –40 °C to +125 °C when VCC ≤ 3.6 V, and from –40 °C to +85 °C when VCC is 4.5 V to 5.25 V. This dual-range specification meets AEC-Q100 Grade 1 requirements for under-hood and cabin-mounted automotive electronics. The junction temperature limit is 130 °C at lower VCC and 90 °C at full 5.25 V operation.
How does TCA9548ARGERQ1 handle I²C bus conflicts caused by duplicate device addresses?
The TCA9548ARGERQ1 resolves I²C address conflicts by isolating each downstream channel (SC0/SD0 through SC7/SD7) into electrically separate bus segments. When a specific channel is selected via its 8-bit control register, only that segment is connected to the upstream SCL/SDA lines - preventing arbitration failures between identical sensors or peripherals. This enables eight identical temperature sensors, for example, to coexist on one controller port.
Can TCA9548ARGERQ1 translate voltage levels between different I²C domains?
Yes, the TCA9548ARGERQ1 supports voltage-level translation by allowing independent pull-up resistors on each SCn/SDn pair referenced to distinct VDPUx voltages. With VCC set to 3.3 V, it can pass signals between a 1.8 V microcontroller (pulling SCL/SDA to 1.8 V) and 5 V sensors (pulling SC7/SD7 to 5 V), eliminating external level shifters. All I/O pins are 5 V tolerant regardless of VCC.
What happens to TCA9548ARGERQ1 channels during power-up or RESET assertion?
On power-up, the TCA9548ARGERQ1 performs a power-on reset (POR) that deselects all eight channels and initializes the I²C state machine to default values. Similarly, asserting the active-low RESET pin forces immediate deselection of all channels and full state-machine reinitialization - recovering from stuck-bus conditions without cycling VCC. Both events guarantee deterministic startup behavior.
Is TCA9548ARGERQ1 pin-compatible with non-automotive versions like PCA9548A?
No - while the TCA9548ARGERQ1 shares identical pinout and register mapping with the industrial PCA9548APW,118, it is not pin-compatible with legacy PCA9548A variants that use SOIC-16 or TSSOP-16 packages. The TCA9548ARGERQ1 is exclusively offered in VQFN-24 (RGE) packaging, and its qualification, thermal specs, and test flow differ significantly from non-Q1 parts.
TCA9548ARGERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 1 x 8:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1.65V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
TCA9548ARGERQ1 FAQ
1.How can I place an order for TCA9548ARGERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TCA9548ARGERQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TCA9548ARGERQ1 reliable?
The price and inventory of TCA9548ARGERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCA9548ARGERQ1 is usually 5 days.
3.What payment methods are accepted for TCA9548ARGERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCA9548ARGERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCA9548ARGERQ1?
TCA9548ARGERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCA9548ARGERQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TCA9548ARGERQ1?
For technical support, including TCA9548ARGERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCA9548ARGERQ1 requirements.
6.How does Aetrix verify that TCA9548ARGERQ1 is sourced from the original manufacturer or authorized distributors?
All TCA9548ARGERQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TCA9548ARGERQ1 meets industry standards.
7.What is the process for return or replacement of TCA9548ARGERQ1?
All TCA9548ARGERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TCA9548ARGERQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TCA9548ARGERQ1 part is unused and in its original packaging.
Return procedure for TCA9548ARGERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TCA9548ARGERQ1 Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
