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Analog Devices Inc./Maxim Integrated MAX4948ETG+
- Part No.:
- MAX4948ETG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
MAX4948ETG+.pdf
- Description:
- IC SWITCH SPDT X 6 5.5OHM 24TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,856
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Product details
Overview
MAX4948ETG+ from Maxim Integrated is a hex single-pole/double-throw (SPDT) analog switch IC designed for high-speed data routing in portable digital systems. It operates from a single +1.8V to +5.5V supply, delivers 4Ω typical on-resistance, 30pF typical off-capacitance, and supports rail-to-rail signal switching - enabling reliable SDIO, USB, and UART signal multiplexing in space-constrained mobile applications.
For engineers reviewing the MAX4948ETG+ datasheet, MAX4948ETG+ pinout, MAX4948ETG+ application, or MAX4948ETG+ equivalent, key selection criteria include its 24-pin TQFN-EP package, EN/CB control architecture, sub-800ns switching times, -70dB off-isolation at 1MHz, and guaranteed operation across -40°C to +85°C industrial temperature range.
Technical Context
The MAX4948ETG+ implements six independent SPDT switches with a shared digital control interface: one enable input (EN) and one bidirectional control input (CB). When EN is low, CB selects between normally open (NO_) and normally closed (NC_) paths for all six COM_ terminals; when EN is high, all switches enter high-impedance state regardless of CB level.
This architecture enables system-level signal isolation and dynamic reconfiguration without requiring per-channel logic. Its CMOS process ensures rail-to-rail analog signal handling, 10nA max leakage at 3.6V, and break-before-make timing of 2ns (typ), preventing momentary short-circuits during switching transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V - supports direct interfacing with 1.8V, 2.7V, 3.3V, and 5V logic and analog domains without level shifters. |
| On-Resistance (RON) | 4Ω (typ) at VCC = 3V - minimizes voltage drop and power loss in signal paths carrying up to ±100mA continuous current. |
| Off-Capacitance (CNO_/CNC_) | 15pF (typ) - preserves signal integrity and bandwidth in high-frequency data lines such as SDIO (up to 50MHz) and USB 1.1. |
| Off-Isolation | -70dB at 1MHz - suppresses crosstalk between active and inactive channels in multi-signal routing applications. |
| Turn-On/Off Time | 800ns (max) at VCC = 2.7V - enables reliable switching within standard SDIO command-response timing windows. |
| Break-Before-Make Delay | 2ns (typ) - prevents transient shorts during state transitions, critical for glitch-free signal handover in host-peripheral switching. |
| Logic Thresholds (VIH/VIL) | 1.6V / 0.5V at full temperature range - ensures robust CMOS-compatible control with 3.3V or 1.8V microcontroller GPIOs. |
Pinout & Package
MAX4948ETG+ is housed in a 24-pin, 4mm × 4mm thermally enhanced TQFN-EP package with exposed paddle (EP) that must be soldered to ground for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–5, 7–12, 15–20, 22–24 | Analog I/O (NO1–NO6, NC1–NC6, COM1–COM6) | Six fully bidirectional SPDT switch terminals - COM_ serves as common port; NO_/NC_ are selectable signal paths with no intrinsic directionality. |
| 6, 21 | GND | Primary ground reference for analog and digital sections; EP pad must be connected to same ground plane. |
| 22 | VCC | Single positive supply input - requires local 0.1µF ceramic bypass capacitor to GND for stable switching performance. |
| 23 | EN | Active-low enable - drives all six switches into high-Z state when high; required for safe hot-swap or power-gating scenarios. |
| 24 | CB | Bidirectional control input - selects NO_ (CB = high) or NC_ (CB = low) for all switches simultaneously when EN = low. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports 0V to VCC signal swing on all NO_, NC_, and COM_ pins - eliminates clipping in audio, sensor, or digital I/O applications. |
| Low 30pF typical off-capacitance | Minimizes capacitive loading on high-speed buses like SDIO and UART, preserving rise/fall times and reducing signal distortion. |
| Guaranteed 4Ω on-resistance match (ΔRON ≤ 0.6Ω) | Ensures consistent insertion loss and timing skew across all six channels - critical for parallel data bus switching. |
| 2ns typical break-before-make interval | Prevents momentary short circuits during switching - essential for fault-tolerant USB or memory card hot-plug detection circuits. |
| 10nA max leakage at 3.6V | Maintains signal integrity in battery-powered systems by minimizing standby current draw and voltage droop on floating nodes. |
Applications
| SDIO/Memory Stick Multiplexing | USB 1.1 Signal Switching |
|---|---|
|
Use Scenario: A smartphone SoC routes SDIO signals between internal eMMC and external microSD card using a single physical interface. IC Role / Device Role / Timing Role: MAX4948ETG+ acts as a bidirectional, low-latency signal router that toggles COM_ between NO_ (eMMC path) and NC_ (microSD path) under host software control via CB/EN. Use Value: Enables dual-storage support without doubling SDIO controller pins or PCB layer count - reduces BOM cost and board area by >35% versus discrete switch solutions. |
Use Scenario: A portable medical device uses one USB transceiver to serve both host-mode (PC connection) and device-mode (peripheral emulation) functions. IC Role / Device Role / Timing Role: MAX4948ETG+ isolates and redirects D+/D− lines between the transceiver and two separate connector ports based on mode detection logic. Use Value: Achieves USB role switching with <2ns inter-channel skew and -70dB off-isolation - meets USB 1.1 eye diagram compliance without additional termination or equalization. |
| UART Port Sharing | Cell Phone Baseband Debug Interface |
|
Use Scenario: An industrial IoT gateway shares a single UART interface among GPS module, BLE radio, and modem via time-division access. IC Role / Device Role / Timing Role: MAX4948ETG+ provides six independent SPDT paths to connect TX/RX lines from baseband processor to any one of three peripherals while keeping others isolated. Use Value: Eliminates need for three separate UART controllers - saves 12 GPIOs and simplifies firmware by enabling dynamic peripheral arbitration in real time. |
Use Scenario: A cellular handset uses debug UART and JTAG signals routed through shared test points accessible only during manufacturing or service. IC Role / Device Role / Timing Role: MAX4948ETG+ places debug lines in high-impedance state (via EN high) during normal operation, then connects them to test equipment upon service trigger. Use Value: Prevents accidental debug access or signal corruption during field use - improves security and system reliability without adding mechanical switches or extra PCB layers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4948ERA+ | Same electrical specs and functionality, but in 25-bump UCSP (2.5mm × 2.5mm) package - 36% smaller footprint, no exposed paddle. | Better suited for ultra-thin handhelds where board height and area are constrained; requires different PCB land pattern and reflow profile. | Select MAX4948ERA+ when minimum PCB area is prioritized over thermal dissipation and manual reworkability. |
| TMUX1574RTER | Quad SPDT (not hex); 5.5Ω RON; 12pF off-capacitance; supports 1.08V–5.5V supply; integrated ESD protection (±4kV HBM). | Lacks EN pin and channel count - requires two devices to match MAX4948ETG+'s six-channel capability; better for low-voltage IoT sensors. | Choose TMUX1574RTER only if system operates below 1.8V or requires certified ESD robustness beyond MAX4948ETG+'s inherent tolerance. |
Compared with MAX4948ERA+, the MAX4948ETG+ offers superior thermal management and easier solder inspection due to its larger TQFN-EP footprint and exposed paddle; compared with TMUX1574RTER, it delivers higher channel density and deterministic EN-controlled shutdown - making it optimal for compact, thermally demanding mobile multiplexing designs.
Availability
MAX4948ETG+ is available at Aetrix Electronics and suitable for SDIO multiplexing, USB signal routing, and UART port sharing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX4948ETG+ 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-reliability ICs for industrial, communications, and consumer applications.
The MAX4947/MAX4948 family was engineered specifically for high-density, low-power signal routing in portable electronics - emphasizing minimal on-resistance variation, ultra-low capacitance, and seamless integration with SDIO, USB, and serial interfaces.
FAQ
What is the maximum continuous current rating per channel of the MAX4948ETG+?
The MAX4948ETG+ supports ±100mA continuous current on each NO_, NC_, and COM_ terminal across the full -40°C to +85°C operating range. This rating ensures reliable operation in SDIO data lines and UART interfaces without derating, provided the total power dissipation remains within the 1667mW limit of its 24-pin TQFN-EP package.
Does the MAX4948ETG+ require external pull-up or pull-down resistors on the EN or CB pins?
No, the MAX4948ETG+ does not require external biasing on EN or CB. Its digital inputs have specified VIH (1.6V min) and VIL (0.5V max) thresholds with ≤1µA leakage, allowing direct connection to microcontroller GPIOs. Internal design ensures clean logic recognition without external resistors - simplifying layout and reducing BOM count.
Can the MAX4948ETG+ be used with 1.8V logic control signals while operating from a 5V analog supply?
Yes, the MAX4948ETG+ supports mixed-voltage operation: CB and EN accept 1.8V logic levels (VIH = 1.6V min) while VCC is at 5V. Its CMOS input structure and rail-to-rail analog capability allow independent optimization of digital control voltage and analog signal range - ideal for interfacing low-power MCUs with higher-voltage peripherals.
How does the exposed paddle (EP) on the MAX4948ETG+ package affect thermal performance?
The exposed paddle on the MAX4948ETG+ must be soldered to a solid GND plane to achieve its rated 1667mW power dissipation. Thermal resistance θJA drops significantly - from ~60°C/W (no paddle connection) to ~48°C/W (with 250mm² copper pad) - enabling sustained operation at full load in compact handheld enclosures without forced airflow.
Is the MAX4948ETG+ pin-compatible with the MAX4947ETG+?
No, the MAX4948ETG+ and MAX4947ETG+ are not pin-compatible. While both use the same 24-pin TQFN-EP package, their pin functions differ: MAX4947ETG+ has three independent CB inputs (CB12, CB34, CB56) and no EN pin, whereas MAX4948ETG+ consolidates control into one CB and adds dedicated EN. PCB layout must be redesigned to migrate between them.
MAX4948ETG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 6
- On-State Resistance (Max):
- 5.5Ohm
- Channel-to-Channel Matching (ΔRon):
- 300mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 800ns, 800ns
- -3db Bandwidth:
- 300MHz
- Charge Injection:
- 10pC
- Channel Capacitance (CS(off), CD(off)):
- 15pF
- Current - Leakage (IS(off)) (Max):
- 3nA
- Crosstalk:
- -90dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TQFN (4x4)
MAX4948ETG+ FAQ
1.How can I place an order for MAX4948ETG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4948ETG+ 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 MAX4948ETG+ reliable?
The price and inventory of MAX4948ETG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4948ETG+ is usually 5 days.
3.What payment methods are accepted for MAX4948ETG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4948ETG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4948ETG+?
MAX4948ETG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4948ETG+ 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 MAX4948ETG+?
For technical support, including MAX4948ETG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4948ETG+ requirements.
6.How does Aetrix verify that MAX4948ETG+ is sourced from the original manufacturer or authorized distributors?
All MAX4948ETG+ 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 MAX4948ETG+ meets industry standards.
7.What is the process for return or replacement of MAX4948ETG+?
All MAX4948ETG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4948ETG+, 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 MAX4948ETG+ part is unused and in its original packaging.
Return procedure for MAX4948ETG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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