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Analog Devices Inc./Maxim Integrated MAX4735EUE
- Part No.:
- MAX4735EUE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4735EUE.pdf
- Description:
- IC SW SPDT-NO/NC 400MOHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,543
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Product details
Overview
MAX4735EUE from Maxim Integrated is a low-voltage, quad-SPDT analog switch optimized for audio signal routing in portable electronics. It delivers 0.31Ω typical on-resistance, <0.02% THD into 8Ω loads, and break-before-make switching across a +1.6V to +3.6V supply range. Its 16-pin TSSOP package supports space-constrained designs such as MP3 players and digital still cameras.
For engineers reviewing the MAX4735EUE datasheet, MAX4735EUE pinout, MAX4735EUE application, or MAX4735EUE equivalent, key selection criteria include on-resistance flatness (0.06Ω), THD+N performance at 32Ω (0.015%), rail-to-rail analog signal handling (0–VCC), and dual independent control inputs (INA/INB) enabling flexible multiplexing/demultiplexing configurations.
Technical Context
The MAX4735EUE implements four fully bidirectional CMOS SPDT switches arranged as two independently controlled pairs: INA governs switches 1 and 2 (COM1/NO1/NC1 and COM2/NO2/NC2), while INB governs switches 3 and 4 (COM3/NO3/NC3 and COM4/NO4/NC4). Each channel supports rail-to-rail analog signals from GND to VCC and guarantees break-before-make timing (2ns typical).
Its digital inputs are 1.8V logic compatible with VIH = 1.4V min and VIL = 0.5V max, and feature internal diode clamping to GND only. The device operates across –40°C to +85°C and draws only 1µA typical supply current at VCC = 3.6V with all inputs floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 0.31Ω typical at VCC = 2.7V, 100mA - enables low-loss audio routing to 8Ω speakers with minimal voltage drop |
| On-resistance flatness | 0.06Ω typical - ensures consistent gain across full analog signal range (0–VCC), critical for low-distortion audio |
| THD+N @ 8Ω | 0.02% typical (20Hz–20kHz) - meets high-fidelity requirements for ringtone/melody IC output paths |
| THD+N @ 32Ω | 0.015% typical - supports premium earphone/headphone switching without audible distortion |
| Supply voltage range | +1.6V to +3.6V - compatible with single-cell Li-ion (3.0–3.6V) and dual-cell NiMH (2.4V) battery systems |
| Turn-on/turn-off time | 40ns/20ns typical (VCC = 2.7V) - supports fast channel switching in multi-source audio systems |
| Off-isolation | –66dB at 100kHz - suppresses crosstalk between active and inactive audio paths |
Pinout & Package
MAX4735EUE uses a 16-pin TSSOP package (4.4mm × 5.0mm × 1.2mm body height, 0.65mm pitch) with exposed pad connected to GND for thermal management. Pin 1 is marked by a dot; pin numbering follows JEDEC standard counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | INA | Control input A - drives COM1↔NO1/NC1 and COM2↔NO2/NC2 simultaneously |
| 2 | NC1 | Normally closed terminal of switch 1 - connects to COM1 when INA = low |
| 3 | COM1 | Common terminal of switch 1 - bidirectional audio path shared between NC1 and NO1 |
| 4 | NO1 | Normally open terminal of switch 1 - connects to COM1 when INA = high |
| 5 | NC2 | Normally closed terminal of switch 2 - connects to COM2 when INA = low |
| 6 | COM2 | Common terminal of switch 2 - bidirectional audio path shared between NC2 and NO2 |
| 7 | NO2 | Normally open terminal of switch 2 - connects to COM2 when INA = high |
| 8 | GND | Ground reference - also connects to exposed pad for thermal dissipation |
| 9 | INB | Control input B - drives COM3↔NO3/NC3 and COM4↔NO4/NC4 simultaneously |
| 10 | NO3 | Normally open terminal of switch 3 - connects to COM3 when INB = high |
| 11 | COM3 | Common terminal of switch 3 - bidirectional audio path shared between NC3 and NO3 |
| 12 | NC3 | Normally closed terminal of switch 3 - connects to COM3 when INB = low |
| 13 | NO4 | Normally open terminal of switch 4 - connects to COM4 when INB = high |
| 14 | COM4 | Common terminal of switch 4 - bidirectional audio path shared between NC4 and NO4 |
| 15 | NC4 | Normally closed terminal of switch 4 - connects to COM4 when INB = low |
| 16 | VCC | Positive power supply - bypass with 0.1µF ceramic capacitor near pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports full 0V to VCC range - eliminates level-shifting circuitry for direct connection to audio codecs and speaker drivers |
| Break-before-make switching | Guaranteed 2ns minimum interval - prevents momentary short-circuits during audio source transitions |
| Low on-resistance matching | 0.015Ω typical ∆RON - maintains balanced channel gain in stereo or differential audio paths |
| 1.8V logic compatibility | VIH = 1.4V min, VIL = 0.5V max - interfaces directly with low-voltage microcontrollers and baseband processors |
| Ultra-low leakage | 100nA max off-leakage (NO_/NC_) and on-leakage (COM_) - preserves DC bias integrity in high-impedance sensor/audio circuits |
Applications
| Cell Phone Audio Routing | Digital Still Camera Speaker Switching |
|---|---|
|
Use Scenario: Dynamically selecting between internal earpiece, external loudspeaker, and Bluetooth headset outputs in a single-chip baseband solution. IC Role / Device Role / Timing Role: Quad-SPDT analog switch providing isolated, low-distortion signal paths under real-time software control via INA/INB. Use Value: Enables zero-crossing mute-free switching with <0.02% THD into 8Ω, eliminating audible pop/click artifacts during call handover. |
Use Scenario: Routing audio feedback (shutter click, zoom tone) from a mono audio codec to either built-in speaker or 3.5mm headphone jack based on user setting. IC Role / Device Role / Timing Role: Dual independent SPDT section (switches 1+2 and 3+4) acting as a 2:1 audio multiplexer per channel. Use Value: Delivers 0.31Ω RON and 0.06Ω flatness to preserve tone fidelity across both output paths without requiring separate amplifiers. |
| MP3 Player Output Multiplexing | PDA Audio Path Management |
|
Use Scenario: Sharing a single stereo DAC output between line-out, headphone amplifier, and internal mono speaker in a battery-powered media player. IC Role / Device Role / Timing Role: Quad-SPDT configured as dual-DPDT to isolate and route left/right channels independently. Use Value: Achieves –66dB off-isolation and –86dB crosstalk at 100kHz, preventing inter-channel bleed during simultaneous playback and recording. |
Use Scenario: Managing audio I/O for voice memo recording, alarm tones, and notification sounds in a handheld PDA with limited PCB area. IC Role / Device Role / Timing Role: Low-power analog switch (1µA ICC) enabling always-on audio routing without compromising battery life. Use Value: Supports 1.6V minimum supply - extends usable battery range down to near-dead cell voltage while maintaining <0.015% THD into 32Ω headphones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4736EUE | Single-supply +1.8V to +5.5V range; 0.45Ω RON (typ); no guaranteed break-before-make | Better suited for higher-VCC systems (e.g., 5V USB audio docks); less optimal for sub-2V battery operation | Select MAX4736EUE only if system VCC exceeds 3.6V or if wider voltage margin outweighs need for guaranteed BBM timing. |
| TS5A23157DGSR | 0.9Ω RON (typ) at 3.3V; 0.05% THD+N into 32Ω; 1.65V–5.5V supply; 10ns tON/tOFF | Higher speed but higher distortion and on-resistance - acceptable for non-audio signal switching (e.g., GPIO, sensor mux) | Choose TS5A23157DGSR only for cost-sensitive, non-critical audio paths where <0.02% THD is not required. |
Compared with MAX4735EUE, MAX4736EUE offers extended voltage range but sacrifices guaranteed break-before-make and low-THD performance, while TS5A23157DGSR trades audio fidelity for faster switching and broader logic compatibility - making MAX4735EUE the optimal choice for portable audio routing where distortion, on-resistance, and timing integrity are design-critical.
Availability
MAX4735EUE is available at Aetrix Electronics and suitable for cell phones, digital still cameras, MP3 players, and PDAs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX4735EUE 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4735EUE belongs to Maxim's low-voltage analog switch product line, designed specifically for high-fidelity audio signal routing in battery-powered portable devices where low on-resistance, ultra-low distortion, and minimal power consumption are essential.
FAQ
What is the maximum continuous current rating for each switch channel in the MAX4735EUE?
The MAX4735EUE supports ±300mA continuous current per NO_, NC_, or COM_ terminal. This rating applies across the full operating temperature range (–40°C to +85°C) and allows direct driving of 8Ω loudspeakers up to 2.3VRMS without exceeding limits. Peak current capability is ±400mA at 50% duty cycle, supporting dynamic audio transients. Exceeding these values risks permanent damage per Absolute Maximum Ratings.
Does the MAX4735EUE require external pull-up or pull-down resistors on INA and INB control inputs?
No, the MAX4735EUE does not require external pull-up or pull-down resistors on INA or INB. These inputs are internally clamped to GND only and accept 1.8V logic levels (VIH ≥ 1.4V, VIL ≤ 0.5V). They remain functional even when VCC is unpowered, enabling safe "power-off" control. However, for best noise immunity in noisy environments, a 100pF capacitor from IN_ to GND is recommended to limit ICC current at the logic threshold.
Can the MAX4735EUE be used to switch differential audio signals?
Yes, the MAX4735EUE can switch differential audio signals because all four SPDT channels are fully bidirectional and support rail-to-rail analog voltages (0V to VCC). To maintain common-mode integrity, use matched pairs (e.g., COM1/NO1/NC1 for one polarity, COM2/NO2/NC2 for the other) and ensure identical trace lengths and loading. Its 0.015Ω on-resistance matching minimizes gain mismatch between differential paths, preserving signal fidelity.
How does supply voltage affect THD+N performance in the MAX4735EUE?
THD+N in the MAX4735EUE improves with increasing supply voltage due to reduced on-resistance flatness modulation. At VCC = 3.6V, THD+N into 8Ω drops below 0.02% (typical), while at VCC = 1.8V it rises to ~0.04%. This occurs because higher VCC lowers RON and flattens its variation across the signal swing. For lowest distortion, operate the MAX4735EUE at the highest stable VCC within its 1.6V–3.6V range.
Is the exposed pad on the MAX4735EUE's TSSOP package electrically connected, and how should it be handled on the PCB?
Unlike the TQFN variant, the MAX4735EUE in TSSOP (U16-2 package code) does not feature an exposed thermal pad - it uses a standard 16-pin TSSOP with plastic body only. Therefore, no thermal pad connection or solder paste stencil aperture is required. Thermal management relies on standard PCB copper pour connected to pin 8 (GND) and pin 16 (VCC) traces. Refer to package drawing TSSOP4.40mm.EPS for exact mechanical dimensions.
MAX4735EUE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 4:2
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 400mOhm
- Channel-to-Channel Matching (ΔRon):
- 15mOhm
- Voltage - Supply, Single (V+):
- 1.6V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 200ns, 180ns
- -3db Bandwidth:
- 20MHz
- Charge Injection:
- 100pC
- Channel Capacitance (CS(off), CD(off)):
- 70pF
- Current - Leakage (IS(off)) (Max):
- 20nA
- Crosstalk:
- -86dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
MAX4735EUE FAQ
1.How can I place an order for MAX4735EUE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4735EUE 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 MAX4735EUE reliable?
The price and inventory of MAX4735EUE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4735EUE is usually 5 days.
3.What payment methods are accepted for MAX4735EUE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4735EUE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4735EUE?
MAX4735EUE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4735EUE 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 MAX4735EUE?
For technical support, including MAX4735EUE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4735EUE requirements.
6.How does Aetrix verify that MAX4735EUE is sourced from the original manufacturer or authorized distributors?
All MAX4735EUE 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 MAX4735EUE meets industry standards.
7.What is the process for return or replacement of MAX4735EUE?
All MAX4735EUE units undergo pre-shipment inspection (PSI). If there is an issue with MAX4735EUE, 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 MAX4735EUE part is unused and in its original packaging.
Return procedure for MAX4735EUE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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