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Analog Devices Inc./Maxim Integrated MAX4948EBA+T
- Part No.:
- MAX4948EBA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 25-WFBGA, CSPBGA
- Datasheet:
-
MAX4948EBA+T.pdf
- Description:
- IC SWITCH SPDT X 6 5.5OHM 25UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,478
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Product details
Overview
MAX4948EBA+T 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 low-distortion SDIO, UART, and USB signal multiplexing in space-constrained mobile applications.
For engineers reviewing the MAX4948EBA+T datasheet, MAX4948EBA+T pinout, MAX4948EBA+T application, or MAX4948EBA+T equivalent, key selection criteria include its 25-bump UCSP (2.5mm × 2.5mm) package, EN/ CB control architecture, break-before-make timing (2ns), -70dB off-isolation at 1MHz, and guaranteed operation across -40°C to +85°C.
Technical Context
The MAX4948EBA+T implements six independent SPDT switches controlled by a single digital logic input (CB) and an active-low enable (EN). When EN is low, CB selects between NO_ (normally open) and NC_ (normally closed) paths per channel; when EN is high, all COM_ terminals enter high-impedance state regardless of CB level.
Its CMOS process ensures rail-to-rail analog signal handling (0V to VCC), bidirectional current flow, and minimal charge injection (10pC typ). The device guarantees 4Ω typical on-resistance flatness ≤1.2Ω over full signal range and exhibits <0.2ns skew between channels under matched load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V - supports direct interface with 1.8V, 2.7V, 3.3V, and 5V logic and analog domains without level shifting. |
| On-Resistance (RON) | 4Ω typical at VCC = +2.7V - enables low insertion loss (<0.1dB) for 50Ω RF/data paths and minimizes voltage drop in power-switching roles. |
| Off-Capacitance (CNO/OFF) | 15pF typical - preserves signal integrity in >100MHz data lines (e.g., SDIO DAT0–DAT3) by limiting capacitive loading and crosstalk. |
| Off-Isolation | -70dB at 1MHz - suppresses leakage between active and inactive signal paths, critical for shared bus arbitration and noise-sensitive receivers. |
| Turn-On/Off Time | 400ns/300ns typical at VCC = +2.7V - meets timing budgets for SDIO mode switching and UART baud-rate handshaking up to 3Mbps. |
| Break-Before-Make Delay | 2ns typical - prevents momentary short-circuit between NO_ and NC_ during state transitions, protecting connected transceivers and PHYs. |
| Logic Thresholds (VIH/VIL) | 1.6V / 0.5V - compatible with 1.8V CMOS inputs and tolerant of slow-rising control signals without requiring external pull-ups. |
Pinout & Package
MAX4948EBA+T is packaged in a 25-bump UCSP™ (2.5mm × 2.5mm) chip-scale package with exposed pad (EP) for thermal and electrical grounding. Pin numbering follows bump-side-down orientation; EP must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 6, 15, 18, 20) | Ground reference | Five dedicated GND bumps provide low-inductance return path for analog and digital currents; essential for noise immunity in mixed-signal routing. |
| VCC (Pin 22) | Positive supply | Single 1.8V–5.5V supply powers all six switches and internal logic; requires local 0.1µF bypass capacitor to minimize supply-induced jitter. |
| EN (Pin 5) | Enable input | Active-low global enable: high = all COM_ terminals float (high-Z); low = enables CB-controlled switching - used for system-level power gating. |
| CB (Pin 14) | Channel control | Single logic input that routes each COM_ to NO_ (CB = high) or NC_ (CB = low); rail-to-rail swing minimizes static current draw. |
| COM1–COM6 (Pins 20, 16, 11, 7, 3, 23) | Analog common terminals | Bidirectional I/O nodes - serve as signal source or sink depending on system topology; support ±100mA continuous current per channel. |
| NO1–NO6 (Pins 19, 17, 10, 8, 2, 24) | Normally open terminals | Connected to COM_ only when CB = high; isolated otherwise - used for primary signal path in default-off configurations. |
| NC1–NC6 (Pins 18, 15, 12, 9, 4, 1) | Normally closed terminals | Connected to COM_ only when CB = low; isolated otherwise - provides fail-safe or backup path when control is inactive. |
Key Features
| Feature | Design Value |
|---|---|
| Hex SPDT architecture with shared CB/EN | Reduces PCB footprint and control-line count vs. discrete switches - one CB line replaces six individual gate controls. |
| Rail-to-rail analog signal handling | Supports full 0V–VCC dynamic range without clipping or distortion - required for unbuffered SDIO CMD/DAT and USB D+/D- signals. |
| Low 30pF typical off-capacitance | Maintains >300MHz -3dB bandwidth (measured) - preserves edge integrity in high-speed serial interfaces without added termination. |
| Guaranteed 4Ω on-resistance match (ΔRON ≤ 0.6Ω) | Ensures consistent signal attenuation across all six channels - critical for balanced differential pair routing and multi-lane data buses. |
| Break-before-make timing (2ns) | Eliminates cross-conduction risk during switching - protects downstream receivers (e.g., SD host controllers) from bus contention faults. |
| UCSP package (2.5mm × 2.5mm) | Enables placement directly beneath BGA processors or memory packages - ideal for ultra-thin smartphones and wearables with strict Z-height limits. |
Applications
| SDIO Interface Multiplexing | USB 1.1 Signal Switching |
|---|---|
|
Use Scenario: A smartphone uses a single SDIO controller to alternate between embedded eMMC and removable microSD card. IC Role / Device Role / Timing Role: MAX4948EBA+T acts as a bidirectional data-path selector, routing CMD, CLK, and DAT0–DAT3 lines between two storage devices under AP control. Use Value: Enables dual-storage support without adding a second SDIO controller - saves SoC pins, reduces firmware complexity, and maintains 48MHz clock timing margins. |
Use Scenario: A portable medical monitor shares USB D+/D- lines between a diagnostic sensor module and a host PC via manual or firmware-selectable mode. IC Role / Device Role / Timing Role: MAX4948EBA+T serves as a USB 1.1-compliant analog switch, isolating unused endpoints and preventing signal reflections during reconfiguration. Use Value: Achieves <10ns propagation delay skew and -90dB crosstalk - preserves USB full-speed (12Mbps) eye diagram integrity and avoids enumeration failures. |
| UART Port Expansion | Memory Stick Interface Sharing |
|
Use Scenario: An industrial IoT gateway routes UART TX/RX between three RS-232 peripherals (GPS, modem, barcode scanner) using a single MCU UART port. IC Role / Device Role / Timing Role: MAX4948EBA+T functions as a low-latency serial path selector, with EN used to disable unused channels and reduce EMI. Use Value: Delivers 300ns turn-off time and 4Ω RON - supports 921.6kbps UART without bit errors or start-bit corruption due to RC time constants. |
Use Scenario: A digital camera supports both Memory Stick PRO Duo and standard Memory Stick via shared physical connector and controller. IC Role / Device Role / Timing Role: MAX4948EBA+T switches address/data/control lines between two card types, with CB synchronized to card-detect GPIO. Use Value: Provides -70dB off-isolation at 1MHz - prevents signal bleed between incompatible card protocols and eliminates false card-insertion detection. |
Availability
MAX4948EBA+T is available at Aetrix Electronics and suitable for portable consumer electronics, industrial handhelds, and medical diagnostics equipment requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for MAX4948EBA+T 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX4947/MAX4948 family targets high-density signal routing in battery-powered devices, emphasizing low on-resistance, minimal parasitic capacitance, and ultra-small packaging for SDIO, USB, and memory-card interface consolidation.
FAQ
What is the maximum analog signal voltage range supported by the MAX4948EBA+T?
The MAX4948EBA+T supports rail-to-rail analog signals from 0V to VCC. With VCC operating from +1.8V to +5.5V, the analog input/output range scales accordingly - e.g., at VCC = +3.3V, signals may swing from 0V to +3.3V without distortion or clipping. This capability is confirmed in the Electrical Characteristics table under "Analog Signal Range" and validated across -40°C to +85°C.
Does the MAX4948EBA+T require external pull-up or pull-down resistors on CB or EN pins?
No, the MAX4948EBA+T does not require external biasing on CB or EN. Its digital inputs have specified VIH (1.6V min) and VIL (0.5V max) thresholds and exhibit ≤1µA leakage current, allowing direct connection to CMOS outputs. Pull resistors are unnecessary unless system-level noise immunity or power-down state retention is required beyond the device's native specifications.
Can the MAX4948EBA+T be used to switch differential USB 2.0 signals?
No, the MAX4948EBA+T is not rated for USB 2.0 (480Mbps) operation. Its -3dB bandwidth is 300MHz and crosstalk is characterized at 1MHz; USB 2.0 requires >400MHz bandwidth and stricter impedance control. The MAX4948EBA+T is qualified for USB 1.1 (12Mbps) and lower-speed differential signals only, as explicitly stated in the Applications section and Typical Operating Circuit.
How is thermal performance managed in the MAX4948EBA+T's UCSP package?
The MAX4948EBA+T's 25-bump UCSP includes an exposed paddle (EP) that must be soldered to a PCB ground plane to dissipate heat. Thermal resistance θJA is not published for the UCSP variant, but the Absolute Maximum Ratings specify 976mW maximum power dissipation at TA = +70°C with 12.2mW/°C derating above that temperature - confirming reliance on proper EP grounding for thermal stability in sustained switching applications.
What happens to the analog channels when EN is driven high?
When EN is driven high, all six COM_ terminals of the MAX4948EBA+T enter a high-impedance (Hi-Z) state - disconnecting them from both NO_ and NC_ paths regardless of CB logic level. This feature enables system-level power gating and prevents back-driving of analog sources during sleep or reset modes, as defined in the Truth Table and Functional Description sections of the datasheet.
MAX4948EBA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 25-UCSP (2.54x2.54)
MAX4948EBA+T FAQ
1.How can I place an order for MAX4948EBA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4948EBA+T 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 MAX4948EBA+T reliable?
The price and inventory of MAX4948EBA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4948EBA+T is usually 5 days.
3.What payment methods are accepted for MAX4948EBA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4948EBA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4948EBA+T?
MAX4948EBA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4948EBA+T 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 MAX4948EBA+T?
For technical support, including MAX4948EBA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4948EBA+T requirements.
6.How does Aetrix verify that MAX4948EBA+T is sourced from the original manufacturer or authorized distributors?
All MAX4948EBA+T 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 MAX4948EBA+T meets industry standards.
7.What is the process for return or replacement of MAX4948EBA+T?
All MAX4948EBA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4948EBA+T, 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 MAX4948EBA+T part is unused and in its original packaging.
Return procedure for MAX4948EBA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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