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Renesas ISL5122IBZ-T
- Part No.:
- ISL5122IBZ-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL5122IBZ-T.pdf
- Description:
- IC SW SPST-NO/NCX2 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,556
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Product details
Overview
ISL5122IBZ-T from Intersil is a low-voltage, single-supply, dual SPST analog switch configured as one normally open (NO) and one normally closed (NC) channel-functioning as a guaranteed break-before-make SPDT switch. It operates from +2.7V to +12V, delivers 19Ω ON-resistance at 5V, 28ns tON/20ns tOFF switching, and 10nA max leakage, targeting signal routing in battery-powered portable electronics such as cellular handsets and medical ultrasound front-ends.
For engineers reviewing the ISL5122IBZ-T datasheet, ISL5122IBZ-T pinout, ISL5122IBZ-T application, or ISL5122IBZ-T equivalent, key selection criteria include guaranteed break-before-make timing (3–10ns), low charge injection (≤5pC), SOT-23-8 package compatibility, and operation across industrial temperature range (−40°C to +85°C) with RoHS-compliant Pb-free termination.
Technical Context
The ISL5122IBZ-T integrates two independent CMOS analog switches on a single die, each controlled by separate digital inputs (IN1, IN2), with complementary NO/NC topology enabling true SPDT functionality without external logic. Its internal level shifters translate TTL/CMOS-compatible input thresholds (VINL ≤ 0.8V, VINH ≥ 2.4V) into full-rail gate drive for the analog pass transistors.
Break-before-make timing is hardware-guaranteed via internal delay circuitry between channel control paths, ensuring no overlap during state transitions-a critical requirement in audio multiplexing and sample-and-hold reset circuits. All analog pins (NO, NC, COM) feature ESD protection diodes to V+ and GND, limiting signal excursion to −0.3V to (V+ + 0.3V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +2.7V to +12V single supply - supports direct integration with 3.3V, 5V, and 12V system rails without level translation. |
| rON (5V) | 19Ω typical - enables low insertion loss in precision signal paths up to 100kHz without gain error degradation. |
| tON / tOFF | 28ns / 20ns at 5V - suitable for high-speed multiplexing in data acquisition and video switching applications. |
| Charge Injection | ≤5pC - minimizes voltage glitch in integrator reset and sample-and-hold circuits, preserving DC accuracy. |
| Leakage Current | 10nA max at 25°C - ensures stable biasing in high-impedance sensor interfaces and medical electrode monitoring. |
| Break-Before-Make Delay | 3–10ns guaranteed - prevents momentary short-circuit during channel switching in audio routing and power sequencing. |
| ESD Rating | ≥2000V per MIL-STD-883 Method 3015.7 - meets IEC 61000-4-2 Level 2 for handheld device robustness. |
Pinout & Package
ISL5122IBZ-T is housed in an 8-lead SOT-23 package (Pb-free, RoHS compliant, MSL Level 2), with thermal resistance θJA = 215°C/W. Pin numbering follows standard SOT-23 top-view orientation (pin 1 marked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Supplies both analog switch core and digital control logic; must be powered before applying any analog or digital signals. |
| GND | Ground reference | Common return for analog signal paths and digital inputs; requires low-impedance PCB connection to minimize noise coupling. |
| IN1 | Digital control input for Channel 1 | Drives NO1/NC1 switch pair; TTL/CMOS compatible with VIH ≥ 2.4V, VIL ≤ 0.8V over full supply range. |
| IN2 | Digital control input for Channel 2 | Independent control of second switch pair; allows asynchronous routing of two analog signals. |
| COM1 | Analog common terminal (Channel 1) | Shared node for NO1 and NC1; connects to signal source or load depending on switch state. |
| NO1 | Normally open terminal (Channel 1) | Connects to COM1 only when IN1 = HIGH; used for active-high signal enable paths. |
| NC1 | Normally closed terminal (Channel 1) | Connects to COM1 only when IN1 = LOW; provides default signal path during power-up or logic fault. |
| COM2 | Analog common terminal (Channel 2) | Second independent signal path; electrically isolated from COM1 for dual-channel isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | Hardware-enforced 3–10ns delay prevents signal shorting during SPDT transitions-critical for audio mute and ADC input protection. |
| Low rON matching (≤1Ω) | Ensures matched gain and phase response across dual channels in differential signal routing and balanced filter networks. |
| Ultra-low leakage (10nA max) | Maintains DC integrity in high-impedance medical sensor front-ends and precision instrumentation amplifiers. |
| Single-supply flexibility | Operates down to +2.7V-enables direct interface with Li-ion battery systems without boost regulation. |
| 60dB PSRR at 1MHz | Rejects supply noise in mixed-signal environments, preserving SNR in audio codecs and RF front-end switching. |
Applications
| Cellular Handset Audio Routing | Ultrasound Signal Multiplexing |
|---|---|
Use Scenario: Switching between multiple microphone inputs and speaker outputs in space-constrained mobile phones. IC Role / Device Role / Timing Role: Dual SPDT analog switch providing low-distortion, low-noise signal path selection with guaranteed break-before-make timing. Use Value: Eliminates need for discrete MOSFET arrays; 19Ω rON and 28ns switching support wideband voice and HD audio bandwidths without attenuation. |
Use Scenario: Selecting among multiple transducer channels in portable ultrasound imaging systems. IC Role / Device Role / Timing Role: High-isolation analog switch enabling time-division multiplexing of echo return signals to a shared ADC. Use Value: 76dB off-isolation and −105dB crosstalk prevent channel bleed, preserving image resolution and dynamic range. |
| Portable ECG Front-End | Industrial DAC Output Switching |
Use Scenario: Routing biopotential electrode signals to differential amplifier inputs while maintaining ultra-low leakage. IC Role / Device Role / Timing Role: Low-leakage (10nA), low-charge-injection (≤5pC) analog switch for precision biometric sensing. Use Value: Prevents baseline drift and offset errors in high-gain (>1000×) instrumentation amplifiers used in diagnostic-grade ECG. |
Use Scenario: Selecting between multiple DAC outputs to drive different actuator control loops in programmable logic controllers. IC Role / Device Role / Timing Role: Industrial-grade SPDT switch supporting 3.3V/5V/12V supplies and −40°C to +85°C operation. Use Value: Enables flexible analog output configuration without redesign; 12V rON = 11Ω ensures minimal gain error in 10-bit+ control systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL5120IHZ-T | Two NO switches only; no NC path or break-before-make guarantee; identical rON, tON/tOFF, and package. | Suitable for active-high-only routing; cannot replace ISL5122IBZ-T in fail-safe or default-path applications. | Select only if system logic handles channel sequencing and no hardware break-before-make is required. |
| TMUX1574IPWR | 4-channel SPDT, 5.5V max supply, 0.5Ω rON matching, but no guaranteed break-before-make; 16-pin TSSOP package. | Higher channel count and lower rON, but larger footprint and no BbM timing assurance limits use in audio mute paths. | Prefer for multi-channel systems where board area permits and BbM is managed in firmware or external logic. |
Compared with ISL5122IBZ-T, ISL5120IHZ-T lacks NC functionality and BbM timing, making it unsuitable for fail-safe routing; TMUX1574IPWR offers more channels and tighter rON matching but requires layout revision and adds software complexity to ensure safe switching.
Availability
ISL5122IBZ-T is available at Aetrix Electronics and suitable for cellular handset design, portable medical instrumentation, and industrial DAC output switching requiring stable component supply and long-term lifecycle support.
Supply support for ISL5122IBZ-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 is a semiconductor company specializing in precision analog and power management ICs, now part of Renesas Electronics since 2017.
The ISL512x family was designed specifically for low-power, high-fidelity analog signal routing in portable and battery-operated equipment, emphasizing small footprint, low leakage, and guaranteed timing behavior.
FAQ
What is the operating temperature range for ISL5122IBZ-T?
The ISL5122IBZ-T is rated for industrial temperature operation from −40°C to +85°C, as confirmed by its "I" grade suffix and ordering information table. This range applies across all electrical specifications including rON, tON/tOFF, and leakage current, making it suitable for automotive cabin modules and outdoor portable medical devices where ambient extremes occur.
Does ISL5122IBZ-T support 3.3V logic control with a 12V analog supply?
Yes, ISL5122IBZ-T supports mixed-voltage operation: digital inputs are TTL/CMOS compatible with VIH ≥ 2.4V and VIL ≤ 0.8V regardless of V+ level, so 3.3V logic can safely control the switch even when V+ = 12V. The internal level shifter ensures correct gate biasing without external components.
Is ISL5122IBZ-T pin-compatible with ISL5120IHZ-T?
Yes, ISL5122IBZ-T and ISL5120IHZ-T share identical 8-lead SOT-23 pinouts and package dimensions (P8.064), but differ functionally: ISL5120IHZ-T has two NO switches, while ISL5122IBZ-T has one NO and one NC switch with guaranteed break-before-make timing. PCB layout reuse is possible, but firmware and signal routing must be verified.
What is the maximum analog signal voltage allowed on ISL5122IBZ-T pins?
The absolute maximum analog signal voltage on NO, NC, or COM pins is −0.3V to (V+ + 0.3V), per Absolute Maximum Ratings. For example, with V+ = 5V, signals may range from −0.3V to +5.3V. Exceeding this risks forward-biasing internal ESD diodes and causing excessive leakage or latch-up.
Why does ISL5122IBZ-T specify "No longer available" with recommended replacement ISL5120IHZ-T?
The "No longer available" status reflects Intersil's product discontinuation notice-not obsolescence of ISL5122IBZ-T itself. ISL5120IHZ-T is recommended only for designs where dual NO functionality suffices; ISL5122IBZ-T remains actively supported by Aetrix Electronics with full traceable inventory and lifecycle coordination for legacy program continuity.
ISL5122IBZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO/NC
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL5122IBZ-T FAQ
1.How can I place an order for ISL5122IBZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL5122IBZ-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 ISL5122IBZ-T reliable?
The price and inventory of ISL5122IBZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL5122IBZ-T is usually 5 days.
3.What payment methods are accepted for ISL5122IBZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL5122IBZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL5122IBZ-T?
ISL5122IBZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL5122IBZ-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 ISL5122IBZ-T?
For technical support, including ISL5122IBZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL5122IBZ-T requirements.
6.How does Aetrix verify that ISL5122IBZ-T is sourced from the original manufacturer or authorized distributors?
All ISL5122IBZ-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 ISL5122IBZ-T meets industry standards.
7.What is the process for return or replacement of ISL5122IBZ-T?
All ISL5122IBZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL5122IBZ-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 ISL5122IBZ-T part is unused and in its original packaging.
Return procedure for ISL5122IBZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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