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Renesas ISL5122IB-T
- Part No.:
- ISL5122IB-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL5122IB-T.pdf
- Description:
- IC SW SPST-NO/NCX2 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,332
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Product details
Overview
ISL5122IB-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, enabling SPDT functionality. It operates from +2.7V to +12V, delivers 19Ω ON-resistance at 5V, 28ns turn-on time, and guarantees break-before-make switching - ideal for signal routing in portable audio/video multiplexing and precision sample-and-hold circuits.
For engineers reviewing the ISL5122IB-T datasheet, ISL5122IB-T pinout, ISL5122IB-T application, or ISL5122IB-T equivalent, key selection criteria include guaranteed break-before-make timing, sub-1Ω rON matching between channels, 5pC max charge injection, 10nA leakage, and SOT-23-6 package compatibility with space-constrained battery-powered designs.
Technical Context
The ISL5122IB-T integrates two independent CMOS analog switches on a single die, each controlled by TTL/CMOS-compatible digital inputs. Its internal level shifter translates logic-level signals to full-rail analog gate drive, enabling bidirectional signal flow across the NO and NC paths while maintaining precise voltage-domain isolation.
Break-before-make operation is hardware-guaranteed via internal timing control circuitry - not dependent on external sequencing - ensuring no transient short-circuit between COM, NO, and NC terminals during state transitions. This behavior is explicitly validated for ISL5122 and ISL5123 variants per datasheet Table 1 and Figure 3 test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +2.7V to +12V single supply - supports direct integration into 3.3V, 5V, and 12V systems without level translation. |
| rON (5V) | 19Ω typical - enables low insertion loss in audio and sensor signal paths up to 10MHz. |
| rON Matching | ≤1Ω - ensures matched gain/attenuation in differential or dual-path applications like stereo audio switching. |
| tON/tOFF | 28ns / 20ns at 5V - supports high-speed multiplexing in data acquisition and digital filter reconfiguration. |
| Charge Injection | 5pC max - minimizes voltage glitch in precision integrator reset and sample-and-hold circuits. |
| Leakage Current | 10nA max - preserves accuracy in high-impedance sensor front-ends and battery-monitoring nodes. |
| ESD Protection | 2000V HBM - meets industrial handling requirements without external protection components. |
Pinout & Package
ISL5122IB-T is housed in a RoHS-compliant 6-pin SOT-23 package (P6.064 drawing), optimized for board space efficiency in portable electronics. Pin assignments are validated per datasheet Page 2 top-view diagram for ISL5122 (SOT-23).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Digital Control Input | Accepts TTL/CMOS logic; drives internal level shifter to control both switch states simultaneously. |
| 2 (V+) | Positive Supply Rail | Single power input for analog and digital sections; sets analog signal range (0V to V+). |
| 3 (GND) | Ground Reference | Common return for supply and logic; required for ESD diode biasing and signal integrity. |
| 4 (NO) | Normally Open Switch Terminal | Connects to COM only when IN = HIGH; used for active-path signal routing. |
| 5 (NC) | Normally Closed Switch Terminal | Connects to COM only when IN = LOW; provides default-path continuity during power-up or fault. |
| 6 (COM) | Common Analog Node | Shared I/O port for bidirectional signal flow; must remain within 0V–V+ during operation. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed Break-Before-Make | Hardware-enforced minimum 3ns delay between NC disconnect and NO connect - prevents signal shorting in SPDT mode. |
| Low Charge Injection (5pC) | Reduces output voltage step error in precision sampling circuits, enabling <1LSB error in 12-bit ADC front-ends. |
| Sub-1Ω rON Matching | Ensures amplitude consistency between dual channels in stereo audio or differential sensor interfaces. |
| 10nA Max Leakage | Supports >10MΩ source impedances in battery voltage monitoring without measurable offset drift. |
| 2.7V Minimum Operation | Enables direct use with Li-ion battery discharge profiles (2.8V–4.2V) without boost regulation. |
Applications
| Audio Signal Routing | Portable Medical Sensors |
|---|---|
Use Scenario: Selecting between microphone and line-in inputs in a Bluetooth headset IC. IC Role / Device Role / Timing Role: Dual-path analog switch providing SPDT function with break-before-make to avoid pop/click artifacts. Use Value: 28ns switching and 5pC charge injection prevent audible transients during real-time audio path changes. | Use Scenario: Multiplexing ECG electrode leads into a single ADC channel in a wearable patch monitor. IC Role / Device Role / Timing Role: Low-leakage analog switch isolating high-impedance biopotential sources during channel scanning. Use Value: 10nA max leakage preserves µV-level signal integrity across 10MΩ electrode impedances. |
| Sample-and-Hold Reset | Industrial DAC Output Switching |
Use Scenario: Discharging integrator capacitor in a precision sigma-delta modulator's feedback loop. IC Role / Device Role / Timing Role: Fast, low-charge-injection switch acting as reset element synchronized to conversion clock. Use Value: 20ns tOFF and 5pC Q ensure sub-1µs reset completion with <10µV residual voltage error. | Use Scenario: Routing multiple DAC outputs to shared op-amp gain stages in programmable logic controller I/O modules. IC Role / Device Role / Timing Role: Precision SPDT switch selecting calibrated voltage references or sensor excitation sources. Use Value: 19Ω rON and ≤1Ω matching maintain gain accuracy across all selected DAC channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617EUT+T | Single SPST, 5Ω rON at 5V, no break-before-make, SOT-23-6 | Lacks SPDT configuration and guaranteed break-before-make timing | Use only where dual-path routing and short-circuit prevention are not required. |
| TMUX1574RSE | Dual SPDT, 4.5Ω rON, 12ns tON, no guaranteed break-before-make, 10-pin UQFN | Higher pin count, no hardware-enforced break-before-make, different package footprint | Preferred for higher speed but requires layout revision and external timing control. |
Compared with MAX4617EUT+T and TMUX1574RSE, the ISL5122IB-T uniquely combines SPDT functionality, guaranteed hardware break-before-make, and SOT-23-6 packaging - making it the only drop-in solution for space-constrained designs requiring fail-safe analog signal routing without PCB redesign.
Availability
ISL5122IB-T is available at Aetrix Electronics and suitable for battery-powered handheld equipment, portable medical devices, and industrial DAC/ADC interface circuits requiring stable component supply across extended temperature ranges (-40°C to +85°C).
Supply support for ISL5122IB-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 manufacturer specializing in precision analog and power management solutions, now part of Renesas Electronics.
The ISL5122IB-T belongs to Intersil's low-voltage analog switch product line, engineered for high-fidelity signal routing in portable, battery-operated systems where size, power, and signal integrity are critical.
FAQ
What is the guaranteed break-before-make time for ISL5122IB-T?
The ISL5122IB-T guarantees a minimum break-before-make time delay (tD) of 3ns across the full operating temperature range (-40°C to +85°C), measured under RL = 300Ω and CL = 35pF conditions per datasheet Figure 3. This hardware-enforced timing prevents momentary shorting between NO and NC paths during switching transitions - a key reliability feature distinguishing ISL5122IB-T from generic analog switches. The ISL5122IB-T specification is validated in production test.
Does ISL5122IB-T support 3.3V logic control with a 5V analog supply?
Yes, ISL5122IB-T supports 3.3V logic control (VINH ≥ 2.4V, VINL ≤ 0.8V) while operating from a 5V analog supply. Its TTL/CMOS-compatible inputs are fully specified across 3.3V, 5V, and 12V supply rails per datasheet Section "Digital Input Characteristics". No external level shifter is needed, and the internal level shifter ensures robust switching regardless of V+ within the +2.7V to +12V range. This capability is confirmed for ISL5122IB-T in FN6022 Rev 8.00.
What is the maximum analog signal voltage range supported by ISL5122IB-T?
The ISL5122IB-T supports an analog signal range from 0V to V+, where V+ is the positive supply rail (up to +12V). Signals applied to NO, NC, or COM pins must remain within -0.3V to (V+ + 0.3V) per Absolute Maximum Ratings, but functional operation is guaranteed only between 0V and V+. Exceeding this range forward-biases internal ESD diodes, increasing leakage and potentially damaging the device. This limitation applies identically to ISL5122IB-T across all operating conditions.
Can ISL5122IB-T be used in high-frequency RF applications above 100MHz?
No, ISL5122IB-T is not characterized or recommended for RF applications above 100MHz. While its off-isolation remains >50dB at 10MHz (Figure 17), performance degrades rapidly beyond that frequency due to parasitic capacitance (COFF = 8pF, CCOM(ON) = 21pF). Datasheet Figure 16 shows usable bandwidth limited to ~30MHz in 50Ω systems. For RF switching above 100MHz, purpose-built RF switches such as the Qorvo QM11037 should be selected instead of ISL5122IB-T.
Is ISL5122IB-T pin-compatible with earlier Intersil analog switches like ISL84543?
No, ISL5122IB-T is not pin-compatible with ISL84543. Although the datasheet states ISL5122 is an "improved, pin compatible replacement" for ISL84543, that statement applies only to the SOIC-8 variant (ISL5122IBZ), not the SOT-23-6 package (ISL5122IB-T). The ISL5122IB-T uses a 6-pin SOT-23 footprint with different pin assignments (IN/V+/GND/NO/NC/COM), whereas ISL84543 uses an 8-pin SOIC layout. Substituting ISL5122IB-T for ISL84543 requires PCB redesign.
ISL5122IB-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
ISL5122IB-T FAQ
1.How can I place an order for ISL5122IB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL5122IB-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 ISL5122IB-T reliable?
The price and inventory of ISL5122IB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL5122IB-T is usually 5 days.
3.What payment methods are accepted for ISL5122IB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL5122IB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL5122IB-T?
ISL5122IB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL5122IB-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 ISL5122IB-T?
For technical support, including ISL5122IB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL5122IB-T requirements.
6.How does Aetrix verify that ISL5122IB-T is sourced from the original manufacturer or authorized distributors?
All ISL5122IB-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 ISL5122IB-T meets industry standards.
7.What is the process for return or replacement of ISL5122IB-T?
All ISL5122IB-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL5122IB-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 ISL5122IB-T part is unused and in its original packaging.
Return procedure for ISL5122IB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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