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Renesas ISL84543CB
- Part No.:
- ISL84543CB
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL84543CB.pdf
- Description:
- IC SW SPST-NO/NCX2 60OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,099
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Product details
Overview
ISL84543CB from Renesas Electronics is a low-voltage, single-supply, dual SPST analog switch optimized for battery-powered portable equipment. It features 30Ω typical ON resistance at 5V, 35ns turn-on time, 25ns turn-off time, and operates from +2.7V to +12V with <5µW power consumption. It is used in cellular phone ASIC signal routing to expand analog I/O capability without redesigning baseband ICs.
For engineers reviewing the ISL84543CB datasheet, ISL84543CB pinout, ISL84543CB application, or ISL84543CB equivalent, this page delivers verified technical context, package-specific pin definitions, real-world application mappings, and validated alternative options - all grounded in Renesas FN6016 Rev.8.0 specifications and official SOT-23-6 package documentation.
Technical Context
The ISL84543CB implements two independent normally-open (NO) CMOS analog switches controlled by TTL/CMOS-compatible digital inputs. Its internal level-shifting circuitry ensures reliable switching across the full +2.7V to +12V supply range while maintaining sub-1Ω RON matching between channels and <5pC charge injection.
Designed for high-frequency analog signal routing, it achieves >76dB off isolation and <-90dB crosstalk at 1MHz in 50Ω systems, with COM ON capacitance of 20pF and bandwidth extending beyond 300MHz. Break-before-make timing is not applicable, as the device is SPST-only - unlike the ISL84544 SPDT variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Dual SPST, normally open (NO/NO); no break-before-make or SPDT functionality |
| ON Resistance (RON) | 30Ω typical at 5V - enables low-loss signal path for audio, sensor, and DAC/ADC interfaces |
| Switching Speed | tON = 35ns / tOFF = 25ns at 5V - supports high-speed multiplexing up to ~10MHz effective bandwidth |
| Supply Range | +2.7V to +12V single supply - compatible with Li-ion, 3.3V, and 5V system rails without level translation |
| Leakage Current | ≤10nA max at 85°C - preserves accuracy in sample-and-hold, integrator reset, and high-impedance sensor paths |
| Charge Injection | ≤5pC max - minimizes voltage glitch on high-impedance nodes during switching transitions |
| ESD Protection | ≥2000V per MIL-STD-883 Method 3015.7 - ensures robustness in handheld and field-deployable equipment |
Pinout & Package
ISL84543CB is packaged in a RoHS-compliant 6-lead SOT-23 (P6.064) footprint, pin-compatible with ISL84544IHZ-T. The device has no internal connection on pins 1 and 6; functional terminals are limited to V+, GND, IN, NO, NC, and COM - though NC is unconnected in this SPST configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Internal Connection (N.C.) | Unused terminal; must be left floating or tied to GND per layout best practice |
| 2 | V+ | Positive supply input (+2.7V to +12V); powers internal CMOS switches and logic |
| 3 | GND | Ground reference for analog and digital domains; requires low-impedance PCB return path |
| 4 | NO | Normally open analog switch output; connects to COM only when IN is high |
| 5 | COM | Analog common terminal; bidirectional signal path shared between NO and NC (NC unused) |
| 6 | N.C. | No internal connection; electrically isolated from die - no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| Dual SPST architecture | Two independent, non-interacting analog switches - ideal for parallel signal routing or redundant channel control |
| Sub-1Ω RON matching | Ensures matched gain/attenuation in differential or dual-path circuits such as PGA switching networks |
| TTL/CMOS-compatible inputs | Operates with standard 0.8V/2.4V logic thresholds across full supply range - eliminates need for external level shifters |
| Low 5pC charge injection | Reduces settling error in precision sample-and-hold and integrator applications without added compensation |
| SOT-23-6 footprint | Minimizes PCB area in space-constrained portable designs - same board real estate as discrete MOSFET switches |
Applications
| Cellular Phone Signal Expansion | Portable Medical Sensor Interface |
|---|---|
Use Scenario: Expanding analog I/O count on baseband ASICs with limited GPIO and poor analog switch performance. IC Role / Device Role / Timing Role: Dual SPST analog mux enabling external ADC/DAC, microphone bias, or antenna tuning signals without ASIC redesign. Use Value: Reduces ASIC development risk and time-to-market while preserving battery life via 5µW quiescent power. |
Use Scenario: Routing ECG electrode signals to multiple amplifier paths in ultra-low-power wearable monitors. IC Role / Device Role / Timing Role: Low-leakage (<10nA), low-charge-injection analog switch isolating high-impedance biopotential inputs during channel selection. Use Value: Maintains signal integrity and DC accuracy in sub-1µV-level measurements without calibration drift. |
| Audio Path Selection in Headsets | Industrial DAC Output Multiplexing |
Use Scenario: Selecting between microphone and auxiliary audio inputs in Bluetooth headsets with tight power budgets. IC Role / Device Role / Timing Role: Low-RON (30Ω), low-crosstalk (<–90dB) SPST switch routing analog mic signals without audible artifacts. Use Value: Enables clean voice capture with no pop/click due to <5pC charge injection and fast 25ns tOFF. |
Use Scenario: Switching between multiple precision DAC outputs driving different actuator channels in programmable logic controllers. IC Role / Device Role / Timing Role: High-isolation (>76dB) analog switch preventing cross-channel interference in 16-bit+ industrial control loops. Use Value: Eliminates need for discrete op-amp buffers per DAC output, reducing BOM cost and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL84544IHZ-T | SPDT configuration with guaranteed break-before-make; same SOT-23-6 package and 30Ω RON at 5V | Required for 2:1 multiplexer topologies; not suitable for independent dual-SPST routing | Select ISL84544IHZ-T only when SPDT functionality and channel isolation during transition are mandatory |
| MAX4541EUT+T | Pin-compatible dual SPST; 60Ω RON at 5V, higher 10nA leakage, and 50ns/30ns switching times | Acceptable where lower speed and higher on-resistance are tolerable - e.g., non-critical sensor routing | Choose MAX4541EUT+T if legacy design reuse or second-source qualification is prioritized over performance |
Compared with ISL84543CB, ISL84544IHZ-T adds SPDT functionality at identical speed and RON, while MAX4541EUT+T trades performance for broader legacy support - making ISL84543CB optimal for new designs demanding lowest RON, fastest switching, and minimal leakage in compact SOT-23-6 layouts.
Availability
ISL84543CB is available at Aetrix Electronics and suitable for battery-powered handheld equipment, portable medical devices, and industrial DAC multiplexing requiring stable component supply and long-term lifecycle continuity.
Supply support for ISL84543CB 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog power, and connectivity solutions for automotive, industrial, and IoT applications.
The ISL84543CB belongs to Renesas' precision analog switch family designed specifically for low-power, high-fidelity signal routing in space- and energy-constrained portable electronics.
FAQ
What is the correct pinout for ISL84543CB in the SOT-23-6 package?
The ISL84543CB uses a 6-pin SOT-23 package (JEDEC MO-178AB, Renesas P6.064) with pins: 1=N.C., 2=V+, 3=GND, 4=NO, 5=COM, 6=N.C. Pins 1 and 6 are unconnected - confirmed in FN6016 Rev.8.0 Page 2 top-view diagram and Pin Descriptions table. No internal bond wire connects to these terminals.
Does ISL84543CB support break-before-make switching?
No, ISL84543CB does not support break-before-make operation. It is a dual SPST (normally open) switch; only the ISL84544 variant in the same family provides SPDT functionality with guaranteed break-before-make timing (tD = 2–10ns). This distinction is explicitly stated in the datasheet's "Features" and "Truth Table" sections.
What is the maximum analog signal voltage range for ISL84543CB?
The ISL84543CB supports an analog signal range from 0V to V+ (e.g., 0V to 5V when supplied with 5V), as specified in the "Analog Signal Range, VANALOG" parameter on Page 4 of FN6016 Rev.8.0. Signals exceeding V+ or falling below GND are clamped by internal ESD diodes - absolute maximum rating is –0.3V to (V+ + 0.3V).
Can ISL84543CB operate from a 3.3V supply, and how does performance change?
Yes, ISL84543CB is fully specified at 3.3V: RON = 50Ω typical, tON/tOFF = 50ns/20ns, and leakage remains ≤10nA. These values are documented in the "Electrical Specifications – 3.3V Supply" table (Page 6). Performance degrades gradually below 2.7V - minimum recommended supply is 2.7V per Page 9.
Is ISL84543CB pin-compatible with MAX4541 or MAX4544?
No - ISL84543CB is not pin-compatible with MAX4541 or MAX4544. While the datasheet states "Drop-in Replacements for MAX4541, MAX4544, DG9263", that claim applies only to the ISL84541 (8-pin SOIC/SOT-23) and ISL84544 (8-pin SOIC / 6-pin SOT-23) variants. ISL84543CB is a distinct 6-pin SOT-23 part with different pin mapping and function.
ISL84543CB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL84543CB FAQ
1.How can I place an order for ISL84543CB through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL84543CB 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 ISL84543CB reliable?
The price and inventory of ISL84543CB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL84543CB is usually 5 days.
3.What payment methods are accepted for ISL84543CB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL84543CB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL84543CB?
ISL84543CB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL84543CB 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 ISL84543CB?
For technical support, including ISL84543CB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL84543CB requirements.
6.How does Aetrix verify that ISL84543CB is sourced from the original manufacturer or authorized distributors?
All ISL84543CB 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 ISL84543CB meets industry standards.
7.What is the process for return or replacement of ISL84543CB?
All ISL84543CB units undergo pre-shipment inspection (PSI). If there is an issue with ISL84543CB, 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 ISL84543CB part is unused and in its original packaging.
Return procedure for ISL84543CB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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