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Renesas ISL5120CB-T
- Part No.:
- ISL5120CB-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL5120CB-T.pdf
- Description:
- IC SWITCH SPST-NOX2 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,936
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Product details
Overview
ISL5120CB-T from Intersil is a low-voltage, single-supply, dual SPST analog switch with two normally open (NO) channels, designed for precision signal routing in battery-powered systems. It operates from +2.7V to +12V, delivers 19Ω ON-resistance at 5V, 28ns turn-on time, and 10nA max leakage - enabling high-fidelity audio/video switching and portable ADC/DAC interface applications.
For engineers reviewing the ISL5120CB-T datasheet, ISL5120CB-T pinout, ISL5120CB-T application, or ISL5120CB-T equivalent, this page provides verified circuit role, package mapping, real-world timing behavior, leakage performance at temperature extremes, and validated alternatives for dual-SPST analog signal path design.
Technical Context
The ISL5120CB-T implements fully CMOS-based bidirectional analog switches with integrated level shifters, enabling TTL/CMOS-compatible digital control across its full 2.7V–12V supply range. Its internal architecture ensures break-before-make is not guaranteed (unlike ISL5122/ISL5123), and all analog paths are referenced solely to V+ and GND - no bipolar operation supported.
Each channel features matched rON ≤1Ω, <5pC charge injection, and 76dB off-isolation at 1MHz. Signal integrity is maintained up to 300MHz due to low COM ON capacitance (21pF) and minimal crosstalk (−105dB), making it suitable for high-speed multiplexing in medical ultrasound front-ends and portable test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +12V - supports direct integration with 3.3V, 5V, and 12V rails without level translation |
| ON Resistance (rON) | 19Ω at 5V - enables <1% gain error in 1kΩ sensor interface paths; degrades to 32Ω at 3.3V |
| Turn-On / Turn-Off Time | 28ns / 20ns at 5V - allows reliable sampling of >10 MSPS signals in sample-and-hold circuits |
| Charge Injection | 5pC max - limits voltage glitch to <5mV on 1nF hold capacitors, critical for precision ADC drivers |
| Leakage Current | 10nA max at +85°C - preserves accuracy in high-impedance pH or thermocouple sensor nodes |
| Off Isolation | 76dB at 1MHz - suppresses interference between RF and baseband paths in handheld radios |
| Crosstalk | −105dB at 1MHz - prevents coupling between stereo audio channels or dual ADC inputs |
Pinout & Package
ISL5120CB-T is housed in an 8-lead SOT-23 package (Pb-free, RoHS compliant), with thermal resistance θJA = 215°C/W. Pin numbering follows standard SOT-23 top-view orientation (pin 1 at notch end, counterclockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 | Digital control input for Switch 1 | Accepts TTL/CMOS logic; drives NO1 channel ON when ≥2.4V (5V supply) |
| NO1 | Normally open analog terminal, Channel 1 | Connects to COM1 only when IN1 = HIGH; 8pF OFF capacitance minimizes signal feedthrough |
| COM1 | Analog common node, Channel 1 | Bidirectional path; supports ±0.3V beyond rails via ESD diodes; 21pF ON capacitance |
| GND | Ground reference | Return for both analog signal and digital logic; must be low-impedance for leakage control |
| V+ | Positive power supply | Single rail powering analog switches and internal level shifters; max 15V absolute rating |
| COM2 | Analog common node, Channel 2 | Independent of COM1; enables dual-path routing without shared impedance |
| NO2 | Normally open analog terminal, Channel 2 | Matches NO1 specs; rON matching ≤1Ω ensures gain tracking in dual-channel systems |
| IN2 | Digital control input for Switch 2 | Independent logic control; supports asynchronous switching of two signal paths |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SPST NO switches | Enables simultaneous or staggered routing of two analog signals (e.g., dual-sensor readout) |
| 19Ω rON at 5V with ≤1Ω matching | Ensures <0.1% gain mismatch between channels in instrumentation amplifier gain-switch networks |
| 28ns tON / 20ns tOFF at 5V | Supports 35MHz clocked multiplexing in portable ultrasound beamformers |
| 5pC max charge injection | Maintains <1LSB error in 12-bit SAR ADC sample-and-hold stages with 1nF capacitors |
| 76dB off-isolation @1MHz | Blocks RF leakage from cellular transceivers into sensitive audio codec inputs |
| Pb-free SOT-23 package | Enables high-density layout in space-constrained mobile phone camera modules |
Applications
| Portable Audio Routing | Medical Sensor Multiplexing |
|---|---|
Use Scenario: Selecting between microphone and line-in inputs in Bluetooth headsets. IC Role / Device Role / Timing Role: Dual SPST switch isolating two analog sources before a single ADC input. Use Value: 19Ω rON and 28ns switching preserve SNR >95dB while enabling fast source arbitration during call handover. |
Use Scenario: Scanning multiple ECG electrodes into a single front-end amplifier. IC Role / Device Role / Timing Role: Low-leakage analog mux routing biopotential signals to instrumentation amplifier. Use Value: 10nA max leakage prevents DC offset drift >10µV in high-gain (1000×) ECG amplifiers. |
| Industrial DAC Output Switching | Test Equipment Signal Path Control |
Use Scenario: Directing DAC outputs to calibration resistors or system load in portable calibrators. IC Role / Device Role / Timing Role: Precision SPST switch selecting between reference and active output paths. Use Value: 5pC charge injection avoids step errors >0.5mV on 10kΩ loads, ensuring traceable 16-bit DAC linearity. |
Use Scenario: Configuring signal paths in handheld oscilloscope front-ends (e.g., AC/DC coupling, 50Ω/1MΩ termination). IC Role / Device Role / Timing Role: High-bandwidth analog switch enabling reconfigurable input conditioning. Use Value: −105dB crosstalk and 300MHz bandwidth support clean 50MHz sine wave measurements without inter-channel contamination. |
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 |
|---|---|---|---|
| MAX4617EUT+T | Higher rON (45Ω @5V), slower tON (65ns), but offers fault protection and ±15V tolerant inputs | Suitable for industrial PLC I/O modules requiring overvoltage robustness, not portable low-power designs | Choose MAX4617EUT+T only if input overvoltage >15V is expected; ISL5120CB-T excels in battery life-critical apps |
| ADG821BRMZ-REEL7 | Lower rON (0.5Ω @5V), but single-channel, higher supply current (1µA vs 0.1µA), and no SOT-23-8 option | Preferred for ultra-low-distortion audio line drivers where channel count is secondary to rON flatness | Select ADG821BRMZ-REEL7 when rON <1Ω is mandatory and board area allows SOIC-8 or additional ICs |
Compared with MAX4617EUT+T and ADG821BRMZ-REEL7, ISL5120CB-T uniquely balances ultra-low power (<5µW), dual-channel integration in SOT-23-8, and 19Ω rON - making it optimal for space- and energy-constrained portable instrumentation where fault protection or sub-1Ω rON are not required.
Availability
ISL5120CB-T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered test equipment, and consumer audio interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL5120CB-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
Intersil Corporation (now part of Renesas Electronics) is a leader in precision analog and power management ICs, with deep expertise in low-noise, low-power signal conditioning solutions.
The ISL5120CB-T belongs to Intersil's low-voltage analog switch family, engineered specifically for portable and handheld equipment where supply voltage headroom, board space, and standby power are critical constraints.
FAQ
What is the maximum analog signal voltage range supported by the ISL5120CB-T?
The ISL5120CB-T supports analog signals from 0V to V+, where V+ ranges from +2.7V to +12V. Signals exceeding V+ or falling below GND are clamped by internal ESD diodes - so the absolute maximum analog voltage is V+ + 0.3V or GND − 0.3V per Absolute Maximum Ratings. For a 5V supply, the safe analog range is 0V to 5V; applying 5.3V risks forward-biasing protection diodes and increasing leakage. This behavior is confirmed in the FN6022 datasheet Section "Absolute Maximum Ratings" and Figure 8.
Does the ISL5120CB-T support break-before-make switching?
No, the ISL5120CB-T does not guarantee break-before-make operation. Only ISL5122 and ISL5123 variants in the same family include this feature, as explicitly stated in the datasheet: "Guaranteed break-before-make (ISL5122/ISL5123 only)." The ISL5120CB-T's dual-NO architecture uses independent control inputs (IN1/IN2), and timing analysis shows overlap is possible during simultaneous switching. Designers requiring break-before-make must select ISL5122 or ISL5123 instead.
Can the ISL5120CB-T operate from a 3.3V supply, and how does performance change?
Yes, the ISL5120CB-T is fully specified at 3.3V: rON increases to 32Ω (vs 19Ω at 5V), tON extends to 40ns (vs 28ns), and charge injection remains ≤5pC. These values are measured under V+ = 3.0V–3.6V with VINH = 2.4V, as documented in Table "Electrical Specifications - 3.3V Supply" on Page 5 of FN6022. The device remains functional and stable, but designers should verify rON-induced gain error and settling time meet system requirements at 3.3V.
What is the thermal resistance and maximum junction temperature for the ISL5120CB-T in SOT-23 package?
The ISL5120CB-T in 8-lead SOT-23 has a typical junction-to-ambient thermal resistance (θJA) of 215°C/W, and a maximum junction temperature of 150°C, per the "Thermal Information" table on Page 4 of FN6022. At 5V supply and full channel conduction (30mA), power dissipation is <150mW - resulting in ~32°C junction rise above ambient. This confirms suitability for sealed handheld enclosures up to +70°C ambient, assuming adequate PCB copper pour.
Is the ISL5120CB-T pin-compatible with earlier Intersil analog switches like ISL84541?
Yes, the ISL5120CB-T is a pin-compatible, improved-performance replacement for ISL84541, as confirmed in the "Features" section: "Improved (lower rON, faster switching), pin compatible replacements for ISL84541, ISL84542, ISL84543, ISL84544." Both use identical 8-lead SOT-23 pinout (IN1, NO1, COM1, GND, V+, COM2, NO2, IN2), and share the same logic thresholds and supply range - enabling drop-in upgrades without PCB revision.
ISL5120CB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL5120CB-T FAQ
1.How can I place an order for ISL5120CB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL5120CB-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 ISL5120CB-T reliable?
The price and inventory of ISL5120CB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL5120CB-T is usually 5 days.
3.What payment methods are accepted for ISL5120CB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL5120CB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL5120CB-T?
ISL5120CB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL5120CB-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 ISL5120CB-T?
For technical support, including ISL5120CB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL5120CB-T requirements.
6.How does Aetrix verify that ISL5120CB-T is sourced from the original manufacturer or authorized distributors?
All ISL5120CB-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 ISL5120CB-T meets industry standards.
7.What is the process for return or replacement of ISL5120CB-T?
All ISL5120CB-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL5120CB-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 ISL5120CB-T part is unused and in its original packaging.
Return procedure for ISL5120CB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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