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Analog Devices Inc./Maxim Integrated MAX4639EGP
- Part No.:
- MAX4639EGP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
MAX4639EGP.pdf
- Description:
- IC SWITCH SP4T-NOX2 3.5OHM 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,316
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Product details
Overview
The MAX4639EGP from Maxim Integrated is a dual 4:1 CMOS analog multiplexer/demultiplexer in a 20-pin QFN (4×4 mm) package, operating from +1.8V to +5.5V single supply or ±2.5V dual supplies. It delivers 3.5Ω on-resistance at +5V, −85dB crosstalk, 85MHz −3dB bandwidth, and break-before-make switching - enabling high-fidelity signal routing in portable medical and test equipment.
For engineers reviewing the MAX4639EGP datasheet, MAX4639EGP pinout, MAX4639EGP application, or MAX4639EGP equivalent, key selection criteria include guaranteed RON matching (≤0.4Ω), rail-to-rail analog signal handling, TTL/CMOS-compatible control inputs, and low leakage (0.25nA at +25°C).
Technical Context
The MAX4639EGP implements two independent 4:1 analog mux channels (COMA/NO1A–NO4A and COMB/NO1B–NO4B), each selected via 2-bit BCD address inputs (A0, A1) and globally enabled by EN. Its CMOS switch architecture ensures bidirectional operation and rail-to-rail signal support across the full supply range.
Switching performance is characterized by 18ns tON, 7ns tOFF, and guaranteed break-before-make timing (1ns min), while dynamic specifications include −75dB off-isolation at 10MHz and −85dB crosstalk at 1MHz - critical for low-noise data-acquisition and audio routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Dual 4:1 analog multiplexer with independent COMA/COMB outputs |
| On-resistance (RON) | 3.5Ω at +5V supply - enables low insertion loss in precision signal paths |
| RON match between channels | ≤0.4Ω - ensures matched gain/attenuation across differential or parallel channels |
| −3dB bandwidth | 85MHz - supports high-speed video, wideband sensor, and RF sampling applications |
| Crosstalk | −85dB at 1MHz - minimizes interference between active and inactive signal paths |
| Off-isolation | −75dB at 10MHz - maintains channel separation under high-frequency noise conditions |
| Leakage current | 0.25nA at +25°C - preserves accuracy in high-impedance sensor front-ends |
Pinout & Package
MAX4639EGP uses a 20-pin QFN package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is top-left corner (A2), and pins 8, 9, 16, 20 are no-connect (N.C.). Ground (GND) is on pin 14; V+ on pin 13; V− on pin 3; EN on pin 2; A0/A1 on pins 17/18; COMA/COMB on pins 7/9; NO1A–NO4A on pins 4–6,10; NO1B–NO4B on pins 1,5,11,12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 11, 12 | NO1B, NO2B, NO3B, NO4B | Bidirectional analog inputs for second 4:1 mux channel |
| 4, 6, 10, ? | NO1A, NO2A, NO3A, NO4A | Bidirectional analog inputs for first 4:1 mux channel (pin 10 = NO4A per datasheet) |
| 7, 9 | COMA, COMB | Common analog outputs - one per 4:1 channel; bidirectional |
| 17, 18 | A0, A1 | 2-bit binary address inputs selecting active NOx input per channel |
| 2 | EN | Active-high enable - disables all switches when low |
| 3 | V− | Negative supply rail (0V for single supply, −2.5V for dual) |
| 13 | V+ | Positive supply rail (+1.8V to +5.5V); powers internal logic and switches |
| 14 | GND | Ground reference for logic and analog sections; must be low-impedance |
| 8, 9, 16, 20 | N.C. | No internal connection - must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports signals from V− to V+ - eliminates level-shifting in battery-powered systems |
| Guaranteed RON flatness | ≤1Ω over full signal range - ensures consistent gain/linearity across input voltage swing |
| TTL/CMOS-compatible inputs | VIH = 2.4V (at +5V), VIL = 0.8V - interfaces directly with microcontrollers and FPGAs |
| Break-before-make switching | Guaranteed 1ns minimum - prevents momentary shorting during channel transitions |
| Low charge injection | 13pC - reduces glitch-induced settling errors in precision ADC/DAC interfaces |
Applications
| Automatic Test Equipment | Medical Instrumentation |
|---|---|
Use Scenario: Routing multiple sensor outputs (ECG, EEG, SpO₂) to a shared ADC in portable patient monitors. IC Role / Device Role / Timing Role: Dual-channel analog mux providing isolated, low-distortion signal selection before digitization. Use Value: 0.25nA leakage and 85MHz bandwidth preserve signal integrity and enable multi-parameter real-time acquisition. | Use Scenario: Signal conditioning and channel selection in handheld ultrasound beamformers. IC Role / Device Role / Timing Role: High-speed analog switch routing echo return paths with minimal crosstalk between transducer elements. Use Value: −85dB crosstalk and 18ns tON ensure clean time-of-flight measurements without inter-channel interference. |
| Audio Signal Routing | Battery-Powered Data Acquisition |
Use Scenario: Selecting between line-in, mic-in, and DAC output in compact audio interfaces. IC Role / Device Role / Timing Role: Low-RON, rail-to-rail analog mux enabling transparent analog path switching without DC bias shift. Use Value: 3.5Ω RON and <0.5% THD prevent audible distortion and level mismatch in consumer-grade audio paths. | Use Scenario: Multiplexing thermocouple, RTD, and strain gauge inputs in field-deployable environmental sensors. IC Role / Device Role / Timing Role: Precision analog switch with ultra-low leakage and matched RON for high-accuracy ratiometric measurements. Use Value: ≤0.4Ω RON match and 0.25nA leakage minimize offset/gain error across temperature-sensitive measurement channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG732BRUZ | 32-channel single-ended mux; 4Ω RON; 16-bit compatible logic; requires external level shift for <1.8V logic | Higher channel count but larger 28-TSSOP package; no dual-output architecture | Choose ADG732BRUZ only when >4 channels per IC are required and board space allows larger footprint. |
| TMUX1308PWR | Single 8:1 mux; 4.5Ω RON; 1.08V–5.5V supply; no dual-channel output | Lacks COMA/COMB dual-output capability; simpler control (no A2 pin) | Choose TMUX1308PWR for cost-sensitive single-path routing where dual independent outputs are unnecessary. |
Compared with ADG732BRUZ and TMUX1308PWR, the MAX4639EGP uniquely provides two synchronized 4:1 muxes with matched RON, rail-to-rail operation down to +1.8V, and integrated break-before-make - making it optimal for differential-signal routing and portable instrumentation requiring compact dual-channel switching.
Availability
MAX4639EGP is available at Aetrix Electronics and suitable for automatic test equipment, portable medical devices, and battery-powered data-acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across −40°C to +85°C.
Supply support for MAX4639EGP 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 industrial, medical, and communications applications.
The MAX4639 belongs to Maxim's low-voltage analog switch family, engineered specifically for high-fidelity signal routing in space-constrained, battery-operated instruments where rail-to-rail operation, low leakage, and tight RON matching are critical.
FAQ
What is the maximum supply voltage rating for MAX4639EGP?
The MAX4639EGP has an absolute maximum V+ to V− rating of +6V. For reliable operation, use within the recommended +1.8V to +5.5V single-supply range or ±2.5V dual-supply range. Exceeding +6V differential may cause permanent damage, as specified in the Absolute Maximum Ratings table of the MAX4639EGP datasheet.
Does MAX4639EGP support rail-to-rail analog signals?
Yes, the MAX4639EGP supports rail-to-rail analog signals - meaning it can pass voltages from V− to V+ without clipping. This is explicitly confirmed in the General Description and Features sections of the MAX4639EGP datasheet and enables direct interfacing with op-amps and ADCs operating at supply rails.
What is the function of the N.C. pins on MAX4639EGP?
Pins 8, 9, 16, and 20 on the MAX4639EGP are designated N.C. (No Connection) and must remain unconnected in the PCB layout. These pins have no internal bond wire or circuit connection, and tying them to any potential violates the MAX4639EGP datasheet's pin description and may compromise thermal or electrical performance.
How does the enable (EN) pin affect switching behavior in MAX4639EGP?
When EN is low, all analog switches in the MAX4639EGP are disabled - disconnecting both COMA/COMB from their respective NOx inputs. When EN is high, channel selection is controlled by A0/A1. The MAX4639EGP datasheet specifies tON(EN) = 18ns and tOFF(EN) = 7ns, ensuring fast global enable/disable with guaranteed break-before-make timing.
Is MAX4639EGP pin-compatible with other packages in the MAX4638/MAX4639 family?
No, the MAX4639EGP (20-pin QFN) is not pin-compatible with the 16-pin QFN, TSSOP, or SO packages of the MAX4639 family. Its pinout differs significantly - including dedicated N.C. pins and relocated COM/NO assignments - as shown in the Pin Configurations section of the MAX4639EGP datasheet. Board redesign is required for package substitution.
MAX4639EGP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SP4T - NO
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 3.5Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- ±2.5V
- Switch Time (Ton, Toff) (Max):
- 18ns, 7ns
- -3db Bandwidth:
- 85MHz
- Charge Injection:
- 13pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -65dB @ 10MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
MAX4639EGP FAQ
1.How can I place an order for MAX4639EGP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4639EGP 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 MAX4639EGP reliable?
The price and inventory of MAX4639EGP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4639EGP is usually 5 days.
3.What payment methods are accepted for MAX4639EGP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4639EGP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4639EGP?
MAX4639EGP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4639EGP 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 MAX4639EGP?
For technical support, including MAX4639EGP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4639EGP requirements.
6.How does Aetrix verify that MAX4639EGP is sourced from the original manufacturer or authorized distributors?
All MAX4639EGP 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 MAX4639EGP meets industry standards.
7.What is the process for return or replacement of MAX4639EGP?
All MAX4639EGP units undergo pre-shipment inspection (PSI). If there is an issue with MAX4639EGP, 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 MAX4639EGP part is unused and in its original packaging.
Return procedure for MAX4639EGP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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