My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4743EKA+T
- Part No.:
- MAX4743EKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-8
- Datasheet:
-
MAX4743EKA+T.pdf
- Description:
- IC SW SPST-NO/NC 800MOHM SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,113
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4743EKA+T from Maxim Integrated is a dual SPST analog switch with one normally open (NO) and one normally closed (NC) channel, operating from a single +1.6V to +3.6V supply. It delivers 0.8Ω max on-resistance at +3V, 24ns turn-on time, break-before-make switching, and 150mA continuous current handling-ideal for power routing and audio signal switching in battery-powered handheld devices.
For engineers reviewing the MAX4743EKA+T datasheet, MAX4743EKA+T pinout, MAX4743EKA+T application, or MAX4743EKA+T equivalent, key selection criteria include verified break-before-make timing (6ns typ), RON flatness (0.18Ω max), rail-to-rail analog signal support, and SOT23-8 package compatibility with space-constrained portable designs.
Technical Context
The MAX4743EKA+T implements CMOS-based dual SPST switching with independent digital control inputs (IN1, IN2) driving separate NO1/NC1 and NO2/NC2 paths. Its break-before-make architecture ensures no transient shorting between COM1 and COM2 during state transitions, critical for power domain isolation.
It supports rail-to-rail analog signals (GND to V+) with <1nA leakage across all terminals at +25°C and maintains <0.08Ω RON matching between channels under +3V bias-enabling precision signal routing without gain mismatch in dual-path systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +3.6V single supply-enables direct integration with Li-ion, coin-cell, and low-voltage logic rails. |
| On-Resistance (RON) | 0.8Ω max at +3V-supports 150mA continuous current with <120mV drop at full load. |
| RON Flatness | 0.18Ω max over full signal range-ensures minimal THD (<0.02%) in audio path applications. |
| Switching Speed | tON = 24ns, tOFF = 16ns-meets timing requirements for high-speed data-acquisition multiplexing. |
| Break-Before-Make Delay | tBBM = 6ns typ-guarantees safe power domain sequencing without shoot-through risk. |
| Logic Compatibility | 1.8V CMOS input threshold at +3V supply-interoperates directly with 1.8V/3.3V microcontrollers without level shifters. |
| Leakage Current | ±5nA max (COM/NO/NC off-state)-preserves battery life in always-on sensor monitoring circuits. |
Pinout & Package
MAX4743EKA+T is housed in an 8-pin SOT23-8 package (package code K8S-3), measuring 4.9mm × 6.0mm × 1.75mm with gull-wing leads. The package supports reflow soldering and is rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | NO1 / V+ | Pin 1: Normally open terminal of Switch 1; Pin 8: Positive supply input-must be powered before analog signals. |
| 2, 7 | COM1 / IN1 | Pin 2: Common terminal of Switch 1; Pin 7: Digital control input for Switch 1-active-high logic. |
| 3, 6 | IN2 / COM2 | Pin 3: Digital control input for Switch 2; Pin 6: Common terminal of Switch 2-enables independent channel control. |
| 4, 5 | GND / NC2 | Pin 4: Ground reference; Pin 5: Normally closed terminal of Switch 2-completes break-before-make pair with NO2. |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make switching | Guaranteed 6ns minimum dead time prevents momentary shorting between power domains during transition. |
| Rail-to-rail analog signal handling | Supports input/output signals from GND to V+ without clipping-essential for full-scale audio and sensor interfaces. |
| Ultra-low quiescent power | <0.2µA supply current at +3.6V-extends battery life in always-on portable equipment. |
| High off-isolation | -55dB at 1MHz-minimizes crosstalk between active and inactive signal paths in multi-channel routing. |
| Low charge injection | 28pC typical-reduces voltage glitch on sampled nodes in precision ADC front-ends. |
Applications
| Battery-Powered Power Routing | Audio Signal Multiplexing |
|---|---|
|
Use Scenario: Dynamic selection of backup power sources (main battery vs. coin cell) in medical wearables. IC Role / Device Role / Timing Role: Dual SPST switch isolating two independent power domains with break-before-make timing preventing backfeed. Use Value: Eliminates need for discrete diodes or PMICs-reducing BOM count and PCB area by 40% versus discrete solutions. |
Use Scenario: Channel selection in stereo headset jack detection and microphone bias routing. IC Role / Device Role / Timing Role: Bidirectional analog switch routing mic/line-in signals to codec with <0.02% THD. Use Value: Maintains signal integrity across 20Hz–20kHz band without external buffering or trimming components. |
| Low-Voltage Data Acquisition | PCMCIA/CompactFlash Interface |
|
Use Scenario: Multiplexing multiple sensor outputs (temperature, accelerometer, ambient light) into a shared ADC. IC Role / Device Role / Timing Role: Low-RON, low-leakage analog switch enabling 16-bit measurement accuracy at 1.8V logic levels. Use Value: RON matching <0.08Ω eliminates inter-channel gain error-removing calibration overhead in production test. |
Use Scenario: Isolating host-side I/O lines from PCMCIA card during hot-insertion events. IC Role / Device Role / Timing Role: Fast-switching SPST gate controlling VCC and I/O lines with controlled break-before-make timing. Use Value: Prevents bus contention and latch-up during card insertion-meeting JEDEC JESD22-B111 reliability standards. |
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 |
|---|---|---|---|
| MAX4742EKA+T | Two NC switches (vs. MAX4743EKA+T's NO/NC configuration); identical RON, timing, and package. | Suitable for fail-safe power disconnect where default-closed path is required. | Select when system requires default continuity on power loss-not for break-before-make signal routing. |
| TMUX1574RSVR | Lower RON (0.5Ω typ), but no guaranteed break-before-make; 1.2V–3.6V supply; 8-pin WSON. | Higher bandwidth (300MHz) but lacks tBBM specification-unsuitable for power domain isolation. | Prefer for high-frequency signal routing only; avoid where shoot-through prevention is mandatory. |
Compared with MAX4742EKA+T and TMUX1574RSVR, the MAX4743EKA+T uniquely combines verified break-before-make timing, NO/NC duality, and ultra-low leakage-making it the only choice for safety-critical power path switching in portable medical and industrial edge devices.
Availability
MAX4743EKA+T is available at Aetrix Electronics and suitable for battery-powered systems, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4743EKA+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 industrial, automotive, and consumer applications.
The MAX474x family targets low-voltage, low-power analog signal routing-specifically engineered for space-constrained portable electronics needing rail-to-rail performance and guaranteed break-before-make timing.
FAQ
What is the maximum continuous current rating for MAX4743EKA+T?
The MAX4743EKA+T supports 150mA continuous current per channel (COM, NO, or NC terminals) at temperatures from -40°C to +85°C. This rating is validated across the full supply range (+1.6V to +3.6V) and enables robust power routing in handheld devices without thermal derating in typical PCB layouts.
Does MAX4743EKA+T require external bypass capacitors?
Yes-Maxim recommends a 0.1µF ceramic capacitor placed between V+ and GND, as close as possible to the MAX4743EKA+T pins. This minimizes supply noise coupling and stabilizes switching transients, especially critical when driving capacitive loads >35pF or operating near the 3.6V absolute maximum rating.
Can MAX4743EKA+T operate with a 1.8V supply?
Yes-the MAX4743EKA+T is fully specified down to +1.6V and operates reliably at +1.8V. At this voltage, RON increases to 2.5Ω max, tON/tOFF extend to 35ns/25ns, and logic thresholds adjust to VIH = +1.0V/VIL = +0.4V-maintaining full functionality in ultra-low-power sensor nodes.
Is the break-before-make timing of MAX4743EKA+T guaranteed across temperature?
Yes-break-before-make timing (tBBM) is guaranteed ≥1ns over the full -40°C to +85°C operating range, with typical performance of 6ns at +25°C. This guarantee is design-verified per Note 6 in the datasheet and applies specifically to the MAX4743 variant-not MAX4741/MAX4742.
What is the off-isolation performance of MAX4743EKA+T at 1MHz?
The MAX4743EKA+T provides -55dB off-isolation at 1MHz (VCOM/VNO or VCOM/VNC), measured with 50Ω source/load and 5pF parasitic capacitance. This value is specified at +25°C and remains ≥-50dB across the full temperature range, ensuring effective signal blocking in RF-adjacent audio and comms circuits.
MAX4743EKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 800mOhm
- Channel-to-Channel Matching (ΔRon):
- 50mOhm
- Voltage - Supply, Single (V+):
- 1.6V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 24ns, 16ns
- -3db Bandwidth:
- 100MHz
- Charge Injection:
- 28pC
- Channel Capacitance (CS(off), CD(off)):
- 32pF, 32pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -110dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX4743EKA+T FAQ
1.How can I place an order for MAX4743EKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4743EKA+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 MAX4743EKA+T reliable?
The price and inventory of MAX4743EKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4743EKA+T is usually 5 days.
3.What payment methods are accepted for MAX4743EKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4743EKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4743EKA+T?
MAX4743EKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4743EKA+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 MAX4743EKA+T?
For technical support, including MAX4743EKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4743EKA+T requirements.
6.How does Aetrix verify that MAX4743EKA+T is sourced from the original manufacturer or authorized distributors?
All MAX4743EKA+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 MAX4743EKA+T meets industry standards.
7.What is the process for return or replacement of MAX4743EKA+T?
All MAX4743EKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4743EKA+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 MAX4743EKA+T part is unused and in its original packaging.
Return procedure for MAX4743EKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4743EKA+T Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
