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Analog Devices Inc./Maxim Integrated MAX4543EKA
- Part No.:
- MAX4543EKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-8
- Datasheet:
-
MAX4543EKA.pdf
- Description:
- IC SW SPST-NO/NCX2 60OHM SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,933
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Product details
Overview
The MAX4543EKA from Maxim Integrated is a precision dual SPST analog switch with one normally open (NO) and one normally closed (NC) channel, designed for single-supply operation from +2.7V to +12V. It delivers 60Ω max on-resistance, 2Ω max RON matching between channels, 5pC max charge injection, and guaranteed break-before-make switching-enabling reliable signal routing in battery-powered audio/video multiplexers and +3V/+5V ADC/DAC interfaces.
For engineers reviewing the MAX4543EKA datasheet, MAX4543EKA pinout, MAX4543EKA application, or MAX4543EKA equivalent, key selection criteria include its SOT23-8 package, -40°C to +85°C temperature rating, TTL/CMOS logic compatibility, low leakage (<10nA at +85°C), and verified break-before-make timing (2ns–10ns delay) critical for preventing signal shorting in SPDT-mode configurations.
Technical Context
The MAX4543EKA implements two independent CMOS transmission-gate switches in a single die: Channel 1 (COM1/NO1/NC1/IN1) and Channel 2 (COM2/NO2/NC2/IN2), each controlled by separate digital inputs. Its internal architecture guarantees break-before-make operation exclusively for transitions involving the NC/NO pair-ensuring no momentary short between COM and both NO/NC terminals during state changes.
It operates with rail-to-rail analog signal handling (0V to V+), supports bidirectional signal flow, and maintains stable RON flatness (≤6Ω) and matching (≤2Ω) across the full input voltage range and temperature (-40°C to +85°C), making it suitable for precision sample-and-hold and low-distortion audio routing where channel consistency is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +12V single supply - enables direct interface with 3.3V, 5V, and 12V systems without level shifters |
| On-Resistance (RON) | 60Ω max at +5V - ensures minimal signal attenuation and voltage drop in sensor or DAC output paths |
| RON Matching | 2Ω max between channels - critical for matched gain/attenuation in differential or dual-path signal conditioning |
| Charge Injection | 5pC max - limits voltage glitch on high-impedance nodes (e.g., sample capacitors in SAR ADCs) |
| Break-Before-Make Delay | 2ns to 10ns - prevents transient short-circuit during channel switching in SPDT emulation mode |
| Leakage Current | 10nA max at +85°C - preserves accuracy in microamp-level sensor front-ends and battery-monitoring circuits |
| Switching Speed | tON = 35ns, tOFF = 25ns at +5V - supports >10MHz analog multiplexing in test equipment and comms systems |
Pinout & Package
SOT23-8 package (8-pin, 3mm × 3mm body, exposed pad connected to V+ per datasheet); pin 1 marked with top-side dot; pin 1 = COM1, pin 2 = IN1, pin 3 = GND, pin 4 = NC2, pin 5 = COM2, pin 6 = IN2, pin 7 = V+, pin 8 = NC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (COM1) | Analog common terminal, Channel 1 | Bidirectional I/O node; connects to NO1 when IN1 = high, to NC1 when IN1 = low |
| 2 (IN1) | Digital control input, Channel 1 | TTL/CMOS-compatible; active-high logic controls NO1/NC1 switching state |
| 3 (GND) | Ground reference | Return path for supply current and logic thresholds; must be low-impedance for leakage control |
| 4 (NC2) | Not internally connected | No internal bond wire; must be left floating or tied to GND/V+ per layout best practices |
| 5 (COM2) | Analog common terminal, Channel 2 | Independent of COM1; enables dual-channel routing without crosstalk coupling |
| 6 (IN2) | Digital control input, Channel 2 | Independent logic control; allows asynchronous switching of Channel 2 vs. Channel 1 |
| 7 (V+) | Positive supply input | Single power rail; powers analog core and logic; exposed pad must connect to V+ for thermal performance |
| 8 (NC1) | Not internally connected | No internal connection; electrically isolated; avoid routing sensitive traces nearby |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | Prevents simultaneous conduction in SPDT-mode use (e.g., COM1–NO1 and COM1–NC1), eliminating signal shorting risks |
| 6Ω max RON flatness | Maintains consistent gain/attenuation across 0V–V+ analog swing-critical for linearity in audio and instrumentation |
| 2000V ESD protection (HBM) | Withstands electrostatic discharge without latch-up or parametric shift-reduces board-level protection component count |
| 5µW typical supply power | Enables always-on signal routing in energy-constrained IoT sensors and portable medical devices |
| Pin-compatible with MAX323/MAX324 | Allows drop-in replacement in legacy designs using those older analog switches-minimizes redesign effort |
Applications
| Audio Signal Routing | ADC/DAC Multiplexing |
|---|---|
Use Scenario: Selecting between microphone and line-in inputs in a portable voice recorder with single 3.3V supply. IC Role / Device Role / Timing Role: Dual-channel analog switch emulating SPDT function per input path; break-before-make prevents pop/click during source switching. Use Value: 5pC charge injection avoids DC offset errors in mic bias networks; 60Ω RON introduces <0.05dB loss at 20kHz into 10kΩ load. | Use Scenario: Sharing a single 12-bit SAR ADC between four sensor outputs in an industrial data logger. IC Role / Device Role / Timing Role: Precision analog multiplexer with matched RON ensuring equal settling time across all channels. Use Value: 2Ω RON matching minimizes gain error between channels; 10nA leakage at +85°C preserves LSB accuracy over temperature. |
| Sample-and-Hold Interface | Battery-Powered Test Equipment |
Use Scenario: Isolating hold capacitor from input driver during acquisition phase in a handheld multimeter front-end. IC Role / Device Role / Timing Role: Low-leakage switch controlling capacitor charging path; fast tON/tOFF enables high sampling rates. Use Value: 100pA max leakage at +25°C limits droop to <1LSB over 10ms hold time for 10nF capacitor. | Use Scenario: Enabling/disabling RF signal paths in a field-deployable spectrum analyzer powered by Li-ion battery. IC Role / Device Role / Timing Role: Low-power analog gate managing signal chain power domains; single-supply simplifies PMIC design. Use Value: 5µW quiescent power extends battery life >200 hours in standby; 2.7V min supply supports operation down to 3.0V battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4543ETA | TDFN-EP package (3mm × 3mm, 0.75mm height) vs. SOT23-8 (3mm × 3mm, 1.45mm height); identical electrical specs and pinout | Better thermal performance and higher power dissipation (1951mW vs. 421mW) - preferred for high-duty-cycle or ambient >70°C environments | Select MAX4543ETA for thermally constrained PCB layouts or extended temperature operation beyond +85°C derating limits |
| ADG704BRM | Single 4-channel SPST (not dual SPST); 4Ω RON typ at +3V but only 100mA peak current rating vs. ±20mA for MAX4543EKA; no break-before-make guarantee | Higher channel density but lacks SPDT-emulation capability and robust short-circuit prevention - unsuitable for safety-critical signal routing | Choose ADG704BRM only when compact 4:1 mux is needed and break-before-make is not required; verify leakage (<1nA) meets system accuracy needs |
Compared with MAX4543ETA, the MAX4543EKA offers identical functionality in a lower-cost, widely adopted SOT23-8 footprint ideal for cost-sensitive volume production; versus ADG704BRM, it provides deterministic break-before-make timing and higher current handling-making it superior for fault-tolerant analog switching where channel independence and reliability are prioritized over channel count.
Availability
MAX4543EKA is available at Aetrix Electronics and suitable for battery-operated systems, precision ADC/DAC interfaces, and audio/video switching requiring stable component supply across industrial temperature ranges.
Supply support for MAX4543EKA 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, communications, and consumer applications.
The MAX4541–MAX4544 family was engineered specifically for low-voltage, single-supply analog switching in space-constrained portable equipment-emphasizing low RON, ultra-low leakage, and guaranteed break-before-make behavior in dual SPST/SPDT configurations.
FAQ
What is the maximum supply voltage rating for the MAX4543EKA?
The MAX4543EKA has an absolute maximum supply voltage (V+) of +13V, but its specified operating range is +2.7V to +12V. Operation above +12V risks exceeding safe operating area limits and may cause permanent damage. The device is fully characterized and guaranteed across the entire +2.7V to +12V range, including RON, leakage, and switching speed parameters.
Does the MAX4543EKA support rail-to-rail analog signal switching?
Yes, the MAX4543EKA supports rail-to-rail analog signals from GND to V+. When V+ = +5V, analog inputs on COM, NO, and NC pins can swing from 0V to +5V without degradation in on-resistance or increased distortion. This is confirmed in the Typical Operating Characteristics plots showing RON vs. COM voltage across the full 0V–V+ range at multiple supply voltages.
Is break-before-make timing guaranteed for both channels of the MAX4543EKA?
Break-before-make timing is guaranteed only for the configuration where a single COM pin toggles between its associated NO and NC terminals-i.e., per channel (COM1↔NO1/NC1 and COM2↔NO2/NC2). It is not guaranteed between channels (e.g., COM1 and COM2). The datasheet explicitly states "MAX4543/MAX4544 Only" for this feature, and timing diagrams (Figures 3a/3b) confirm it applies to individual COM–NO–NC triplets.
What is the thermal pad connection requirement for the MAX4543EKA SOT23-8 package?
The MAX4543EKA in SOT23-8 has no exposed thermal pad; only the TDFN-EP variant (MAX4543ETA) includes an exposed pad. The SOT23-8 package uses standard copper leadframe construction. Thermal dissipation relies on PCB copper area under pins 3 (GND) and 7 (V+), with recommended minimum 25mm² copper pour per pin for optimal junction temperature control.
Can the MAX4543EKA be used as a single-pole double-throw (SPDT) switch?
Yes, the MAX4543EKA can emulate an SPDT switch using one channel: connect COM1 to the common node, NO1 to the "normally open" path, and NC1 to the "normally closed" path. Its guaranteed break-before-make timing ensures no overlap between NO1 and NC1 conduction, satisfying true SPDT behavior. This is explicitly stated in the General Description: "The MAX4543 has one NO and one NC switch and can be used as an SPDT."
MAX4543EKA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 60Ohm
- Channel-to-Channel Matching (ΔRon):
- 800mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 12V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 100ns, 75ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -90dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX4543EKA FAQ
1.How can I place an order for MAX4543EKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4543EKA 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 MAX4543EKA reliable?
The price and inventory of MAX4543EKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4543EKA is usually 5 days.
3.What payment methods are accepted for MAX4543EKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4543EKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4543EKA?
MAX4543EKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4543EKA 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 MAX4543EKA?
For technical support, including MAX4543EKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4543EKA requirements.
6.How does Aetrix verify that MAX4543EKA is sourced from the original manufacturer or authorized distributors?
All MAX4543EKA 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 MAX4543EKA meets industry standards.
7.What is the process for return or replacement of MAX4543EKA?
All MAX4543EKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4543EKA, 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 MAX4543EKA part is unused and in its original packaging.
Return procedure for MAX4543EKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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