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Renesas ISL5123CB
- Part No.:
- ISL5123CB
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL5123CB.pdf
- Description:
- IC SWITCH SPDT X 1 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,576
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Product details
Overview
ISL5123CB from Intersil is a low-voltage, single-supply, committed SPDT analog switch designed for 2-to-1 multiplexer applications. It operates from +2.7V to +12V, delivers 19Ω ON-resistance at 5V, 28ns turn-on time, and guarantees break-before-make switching - enabling precise signal routing in portable audio/video and medical instrumentation.
For engineers reviewing the ISL5123CB datasheet, ISL5123CB pinout, ISL5123CB application, or ISL5123CB equivalent, this page provides verified electrical specs, SOT-23 package mapping, truth table–validated terminal roles, and two confirmed alternative parts with documented functional trade-offs for battery-powered and high-speed analog switching designs.
Technical Context
The ISL5123CB implements a single-pole double-throw (SPDT) topology with dedicated NO, NC, and COM pins - unlike dual-SPST variants in the same family. Its internal CMOS switch architecture uses level-shifted TTL/CMOS-compatible control logic to drive analog paths across the full supply range.
Break-before-make timing (tD ≤ 10ns) is guaranteed per datasheet Table 4 and Figure 3, ensuring no signal shorting during state transitions. Charge injection is limited to 5pC max, supporting precision sample-and-hold and DAC/ADC interface applications without significant voltage glitch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Committed SPDT - fixed NO/NC/COM configuration optimized for 2:1 multiplexing, not reconfigurable as dual SPST. |
| ON Resistance (rON) | 19Ω at 5V supply - enables low insertion loss in audio and sensor signal paths; degrades to 32Ω at 3.3V and 11Ω at 12V. |
| Switching Speed | tON = 28ns / tOFF = 20ns at 5V - supports >10MHz analog multiplexing with minimal propagation delay skew. |
| Leakage Current | ≤10nA max OFF-state leakage - preserves signal integrity in high-impedance sensor front-ends and integrator reset circuits. |
| Supply Range | +2.7V to +12V single supply - compatible with Li-ion, 3.3V, 5V, and 12V industrial rails without level-shifting. |
| Charge Injection | 5pC max - minimizes voltage step error on sampled capacitors in precision data acquisition systems. |
Pinout & Package
ISL5123CB is packaged in an 8-lead SOIC (RoHS-compliant, M8.15 drawing), operating over 0°C to +70°C ambient temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Digital Control Input | TTL/CMOS-compatible logic input (VIL ≤ 0.8V, VIH ≥ 2.4V); controls SPDT state transition. |
| COM | Analog Switch Common Pin | Shared signal path terminal - connects to either NO or NC depending on IN logic state. |
| NO | Analog Normally Open Pin | Connects to COM only when IN = logic high; open-circuit otherwise - used for active-high selection paths. |
| NC | Analog Normally Closed Pin | Connects to COM only when IN = logic low; open-circuit otherwise - used for active-low selection paths. |
| V+ | Positive Supply Rail | Single power input (+2.7V to +12V); sets analog signal range and powers internal logic/level shifters. |
| GND | Ground Reference | System ground return for analog and digital circuitry; substrate reference for CMOS switches. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed Break-Before-Make | Ensures no momentary short between NO and NC during switching - critical for protecting downstream circuitry in relay-replacement and signal-routing applications. |
| Low 5pC Charge Injection | Reduces sampling error in precision ADC interfaces and integrator reset networks where capacitor settling must be predictable. |
| 2.7V Minimum Supply Operation | Enables direct integration into single-cell Li-ion (3.0–3.6V) and low-power portable systems without auxiliary voltage regulation. |
| 2000V ESD Protection | Meets MIL-STD-883 Method 3015.7 - supports robust handling in manufacturing and field deployment of handheld test equipment. |
| High Off Isolation (76dB) | Suppresses crosstalk and feedthrough in multi-channel audio/video routing, maintaining channel separation up to 1MHz. |
Applications
| Portable Audio Routing | Medical Sensor Multiplexing |
|---|---|
Use Scenario: Selecting between microphone and line-in inputs in a Bluetooth headset or voice recorder. IC Role / Device Role / Timing Role: SPDT analog switch providing bidirectional, low-distortion signal path selection under microcontroller GPIO control. Use Value: 19Ω rON and 76dB off-isolation preserve SNR; 28ns switching enables seamless source handover without audible pop. |
Use Scenario: Time-division multiplexing of ECG, SpO₂, and temperature sensor outputs into a shared ADC channel. IC Role / Device Role / Timing Role: Precision SPDT switch isolating high-impedance biopotential signals during channel scanning. Use Value: ≤10nA leakage prevents baseline drift; break-before-make prevents cross-sensor coupling during acquisition. |
| Industrial DAC Output Switching | Test Equipment Signal Path Selection |
Use Scenario: Routing a single DAC output to multiple actuator drivers or calibration references in PLC I/O modules. IC Role / Device Role / Timing Role: Low-rON, rail-to-rail analog switch enabling accurate voltage transfer without gain error. Use Value: 11Ω rON at 12V ensures <0.1% gain error into 1kΩ loads; 12V operation matches industrial supply standards. |
Use Scenario: Configuring signal paths in portable ultrasound or electrocardiograph front-ends requiring fast, repeatable channel selection. IC Role / Device Role / Timing Role: High-speed SPDT switch enabling sub-100ns path reconfiguration during automated test sequences. Use Value: 20ns tOFF and 5pC charge injection minimize settling time and transient artifacts in sensitive analog measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL5120IHZ-T | Dual SPST (NO/NO), 6-lead SOT-23, -40°C to +85°C rating; lacks NC pin and break-before-make guarantee. | Suitable for independent channel switching but not true SPDT replacement; requires PCB redesign for pin count and routing. | Select only if dual independent switches are needed and SPDT functionality is unnecessary. |
| TMUX1574DRYR | Single SPDT, 6-lead WSON, 1.8V–5.5V supply, 0.5Ω rON, no break-before-make spec; higher bandwidth (300MHz). | Better for low-voltage, high-frequency RF routing but unsuitable for 12V industrial or medical isolation-critical use cases. | Prefer for battery-powered IoT sensors at 3.3V; avoid where 12V compatibility or guaranteed break-before-make is required. |
Compared with ISL5123CB, ISL5120IHZ-T offers wider temperature range and smaller footprint but sacrifices SPDT topology and break-before-make assurance; TMUX1574DRYR delivers lower rON and higher speed at 3.3V but cannot operate above 5.5V or guarantee safe switching transitions in safety-critical analog paths.
Availability
ISL5123CB is available at Aetrix Electronics and suitable for portable medical devices, industrial DAC interfaces, and handheld test equipment requiring stable component supply across legacy design refresh cycles.
Supply support for ISL5123CB 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
Intersil Corporation is a precision analog and power management IC specialist, now part of Renesas Electronics, with deep expertise in high-performance switching, signal conditioning, and low-power interface solutions.
The ISL5123CB belongs to Intersil's low-voltage analog switch product line, engineered specifically for battery-powered instrumentation and portable systems demanding rail-to-rail signal handling, ultra-low leakage, and guaranteed switching safety.
FAQ
What is the operating temperature range for the ISL5123CB?
The ISL5123CB is specified for 0°C to +70°C ambient operation, as confirmed in the Ordering Information table (page 3) and Recommended Operating Conditions (page 4) of FN6022 Rev 8.00. This commercial-grade rating applies to all ISL5123CBZ and ISL5123CBZ-T variants. For extended temperature support, the ISL5123IBZ (-40°C to +85°C) or ISL5123IHZ-T (6-lead SOT-23, -40°C to +85°C) are documented alternatives - but ISL5123CB itself is strictly 0°C to +70°C.
Does the ISL5123CB support break-before-make switching?
Yes, the ISL5123CB guarantees break-before-make operation with a maximum delay time tD of 10ns, as explicitly stated in the Electrical Specifications tables (pages 4–7) and validated in Figure 3 of FN6022 Rev 8.00. This feature is shared only with ISL5122 and is not present in ISL5120 or ISL5121 - making ISL5123CB suitable for applications where momentary shorting between NO and NC must be avoided, such as in sensor multiplexing or relay replacement circuits.
What package type and pin count does the ISL5123CB use?
The ISL5123CB uses an 8-lead SOIC package (RoHS-compliant, pkg drawing M8.15), as confirmed in the Ordering Information table (page 3) and Pin Configurations diagram (page 2) of FN6022 Rev 8.00. It is not offered in SOT-23 - that variant is designated ISL5123IHZ-T (6-lead) or ISL5123IBZ/ISL5123IHZ-T (8-lead). The ISL5123CB's 8-pin SOIC layout matches standard SOIC-8 footprints and supports hand-soldering and automated assembly in commercial-grade PCBs.
Can the ISL5123CB operate from a 3.3V supply?
Yes, the ISL5123CB is fully specified at 3.3V supply (V+ = +3.0V to +3.6V), delivering 32Ω typical ON-resistance, 40ns tON, and 20ns tOFF per the Electrical Specifications – 3.3V Supply table (page 5). Its TTL/CMOS-compatible inputs (VIH ≥ 2.4V) ensure reliable logic-level interfacing with 3.3V microcontrollers without level shifters - making ISL5123CB suitable for modern low-voltage portable designs while retaining backward compatibility with 5V and 12V systems.
Is the ISL5123CB still in production or recommended for new designs?
The ISL5123CB and ISL5123CBZ-T are marked "No longer available" in the official Ordering Information table (page 3), with Intersil recommending ISL5120IHZ-T as a replacement - though that part is functionally distinct (dual SPST, not SPDT). Aetrix Electronics maintains legacy inventory of ISL5123CB for existing design support and obsolescence mitigation. For new designs, engineers should evaluate ISL5123IHZ-T (6-lead SOT-23, -40°C to +85°C) or cross-check functional alternatives like TMUX1574DRYR where voltage and timing requirements align.
ISL5123CB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Bag
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 20Ohm
- Channel-to-Channel Matching (ΔRon):
- 800mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 12V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 35ns, 30ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -105dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL5123CB FAQ
1.How can I place an order for ISL5123CB through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL5123CB 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 ISL5123CB reliable?
The price and inventory of ISL5123CB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL5123CB is usually 5 days.
3.What payment methods are accepted for ISL5123CB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL5123CB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL5123CB?
ISL5123CB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL5123CB 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 ISL5123CB?
For technical support, including ISL5123CB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL5123CB requirements.
6.How does Aetrix verify that ISL5123CB is sourced from the original manufacturer or authorized distributors?
All ISL5123CB 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 ISL5123CB meets industry standards.
7.What is the process for return or replacement of ISL5123CB?
All ISL5123CB units undergo pre-shipment inspection (PSI). If there is an issue with ISL5123CB, 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 ISL5123CB part is unused and in its original packaging.
Return procedure for ISL5123CB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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