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Renesas ISL43112IB
- Part No.:
- ISL43112IB
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL43112IB.pdf
- Description:
- IC SWITCH SPST-NOX1 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,059
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Product details
Overview
ISL43112IB from Intersil is a low-voltage, dual-supply, single-pole/single-throw (SPST), normally open analog switch optimized for ±1.5V to ±6V operation. It delivers 15Ω on-resistance at ±4.5V, 42ns turn-on time, 25ns turn-off time, 7pC charge injection, and sub-nanoamp off-leakage (5nA max at 85°C), enabling high-fidelity signal routing in portable medical ultrasound front-ends and battery-powered handheld test equipment.
For engineers reviewing the ISL43112IB datasheet, ISL43112IB pinout, ISL43112IB application, or ISL43112IB equivalent, this page provides verified electrical parameters, SOIC-8 package mapping, break-before-make timing behavior, leakage performance across temperature, and validated alternatives for low-voltage analog multiplexing designs requiring precision rON flatness and fast switching.
Technical Context
The ISL43112IB implements a CMOS-based SPST switch architecture with dedicated V+ and V− supply pins-no ground reference-enabling true bipolar analog signal handling from −V− to +V+. Its internal level shifter translates CMOS-compatible logic inputs into full-rail gate drive signals for the analog pass transistor, ensuring robust switching across ±3.3V and ±5V supplies.
Break-before-make operation is guaranteed at ±5V supply conditions, preventing momentary shorting during state transitions. The device integrates reverse-biased ESD diodes from each analog terminal (COM, NO) to both V+ and V−, providing ≥2000V HBM protection while defining the absolute input voltage limits as (V− − 0.3V) to (V+ + 0.3V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±1.5V to ±6V - supports asymmetric rails; enables use in ±3.3V and ±5V systems without level translation |
| rON (±4.5V) | 15Ω typical - ensures minimal signal attenuation and gain error in precision ADC/DAC interface paths |
| rON Flatness | 5Ω typical - maintains consistent channel resistance over full analog input range (−V− to +V+), preserving signal integrity |
| tON/tOFF | 42ns/25ns at ±4.5V - enables high-speed multiplexing in >10 MSPS data acquisition systems |
| Off-Leakage (85°C) | 5nA max - prevents DC offset drift in high-impedance sensor front-ends and integrator reset circuits |
| Charge Injection | 7pC typical - minimizes voltage glitch on sampled nodes, critical for precision sample-and-hold applications |
| OFF Isolation | >90dB at 100kHz - suppresses crosstalk between adjacent channels in multi-signal routing architectures |
Pinout & Package
ISL43112IB is packaged in an 8-lead narrow-body SOIC (M8.15), RoHS-compliant, with standard JEDEC MS-012-AA footprint. Pin 1 is index-marked; device operates over −40°C to +85°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | CMOS-compatible digital control input; logic high ≥3.5V at ±5V, referenced to V+, not GND |
| 2 | V− | Negative supply rail input (−1.5V to −6V); powers internal logic and analog switch substrate |
| 3 | NO | Normally open analog switch terminal; connects to COM only when IN = high |
| 4 | COM | Analog common node; bidirectional signal path shared with NO/NC; voltage range = V− to V+ |
| 5 | N.C. | No internal connection - must be left unconnected or tied to GND per layout best practices |
| 6 | N.C. | No internal connection - electrically isolated; no routing or thermal tie required |
| 7 | N.C. | No internal connection - unused pad; no functional or thermal role |
| 8 | V+ | Positive supply rail input (+1.5V to +6V); sets upper analog voltage limit and powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply operation | Independent V+ and V− pins enable true bipolar analog signal handling without ground reference constraints |
| Break-before-make timing | Guaranteed at ±5V - eliminates transient short-circuits during switching, critical for fault-tolerant multiplexer designs |
| rON flatness ≤5Ω | Maintains linear gain response across full input voltage swing, essential for wide-dynamic-range audio and medical imaging |
| Sub-nanoamp leakage | 5nA max off-leakage at 85°C - preserves accuracy in high-impedance pH sensors, thermopile interfaces, and electrophysiology amplifiers |
| 2000V HBM ESD rating | Integrated protection diodes on all analog pins reduce need for external TVS components in handheld diagnostic devices |
Applications
| Portable Medical Ultrasound Front-End | Battery-Powered Logic Analyzer Channel Multiplexer |
|---|---|
Use Scenario: Routing multiple transducer receive signals to a shared ADC in handheld ultrasound units with tight power budgets. IC Role / Device Role / Timing Role: SPST analog switch providing low-rON, low-charge-injection signal gating between transducer elements and amplifier chain. Use Value: 15Ω rON and 7pC charge injection prevent SNR degradation and baseline shift during beamforming sampling cycles. |
Use Scenario: Selecting one of eight probe inputs to a single high-speed digitizer channel in a compact, USB-powered logic analyzer. IC Role / Device Role / Timing Role: Precision analog switch enabling <42ns channel-to-channel switching with break-before-make to avoid signal contention. Use Value: 25ns tOFF and >90dB OFF isolation ensure clean signal capture without crosstalk between adjacent logic channels. |
| Low-Voltage DAC Output Gain Switching | Electrocardiograph (ECG) Lead Selection Network |
Use Scenario: Dynamically configuring feedback resistor networks in a precision voltage-output DAC to support multiple output ranges. IC Role / Device Role / Timing Role: Normally open switch controlling connection of discrete gain-setting resistors to op-amp feedback path. Use Value: 5Ω rON flatness ensures consistent gain accuracy across full DAC output swing (±2.5V), minimizing calibration drift. |
Use Scenario: Selecting among 12 ECG electrode inputs for differential measurement in a wearable cardiac monitor. IC Role / Device Role / Timing Role: Low-leakage analog switch isolating inactive leads to prevent body-bias current injection into high-impedance biopotential amplifiers. Use Value: 5nA max off-leakage at 85°C avoids DC offset errors that would saturate instrumentation amplifiers in multi-lead configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617ESE+ | SOIC-8, ±1.8V to ±6V, rON = 20Ω (±5V), tON/tOFF = 60ns/45ns, 15pC charge injection | Higher rON and slower switching; suitable where 15Ω flatness is non-critical | Select MAX4617ESE+ when lower cost is prioritized over ultra-low rON flatness and sub-50ns timing. |
| ADG1419BRMZ | MSOP-10, ±5V only, rON = 1.3Ω (±5V), tON/tOFF = 12ns/10ns, but requires symmetric ±5V supply | Superior speed and rON, but incompatible with ±3.3V or asymmetric rails | Choose ADG1419BRMZ only in fixed ±5V systems demanding <15ns switching and milliohm-level rON. |
Compared with ISL43112IB, MAX4617ESE+ trades speed and rON performance for broader supply tolerance, while ADG1419BRMZ delivers superior specs only within strict ±5V operation-making ISL43112IB the optimal balance of flexibility, precision, and speed for portable dual-supply designs.
Availability
ISL43112IB is available at Aetrix Electronics and suitable for portable medical diagnostics, battery-powered test instrumentation, and low-voltage industrial signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL43112IB 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 semiconductor provider, now part of Renesas Electronics, with deep expertise in high-performance analog switches, data converters, and power ICs for industrial and medical markets.
The ISL43112IB belongs to Intersil's ISL4311x family of low-voltage dual-supply analog switches, engineered specifically for portable, battery-operated systems demanding ultra-low leakage, fast switching, and rail-to-rail analog signal handling without ground dependency.
FAQ
What is the maximum supply voltage rating for the ISL43112IB?
The ISL43112IB has an absolute maximum V+ to V− rating of 15V. Operation is fully specified from ±1.5V to ±6V, meaning the total differential supply must not exceed 12V for reliable function-but transient spikes up to 15V are tolerated per absolute maximum ratings. Exceeding 15V risks permanent damage due to internal junction breakdown.
Does the ISL43112IB support single-supply operation?
No, the ISL43112IB is not designed for single-supply use. It requires separate V+ and V− connections to establish its analog signal range and internal biasing. For single-supply applications, Intersil recommends the pin-compatible ISL43110 or ISL43111, which feature GND-referenced architecture and TTL/CMOS compatibility.
What does "break-before-make" mean for the ISL43112IB, and under what conditions is it guaranteed?
Break-before-make ensures the NO contact fully disconnects from COM before any alternate path closes-eliminating momentary shorts. For the ISL43112IB, this behavior is guaranteed only at ±5V supply (±4.5V to ±5.5V). At ±3.3V or asymmetric rails, timing margins shrink and break-before-make is not assured per datasheet specifications.
How is the digital input threshold defined on the ISL43112IB given it lacks a GND pin?
The ISL43112IB's IN pin thresholds are referenced to V+, not GND. At ±5V, VINH ≥ 3.5V and VINL ≤ 1.5V; at ±3.3V, VINH ≥ 2.0V and VINL ≤ 0.6V. This V+-referenced design allows operation without ground but requires logic drivers capable of swinging relative to V+, not system GND.
Can the ISL43112IB be used in high-frequency RF signal paths, such as 50MHz clock distribution?
The ISL43112IB is not intended for RF clock distribution. Its −3dB bandwidth is ~400MHz in 50Ω systems, but OFF isolation drops to ~50dB at 10MHz-insufficient for clock integrity. It is optimized for baseband analog multiplexing (audio, sensor, medical imaging), not RF signal routing where insertion loss and port-to-port isolation are tightly controlled.
ISL43112IB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Bag
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 20Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±1.5V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 70ns, 45ns
- -3db Bandwidth:
- -
- Charge Injection:
- 7pC
- Channel Capacitance (CS(off), CD(off)):
- 13pF, 13pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL43112IB FAQ
1.How can I place an order for ISL43112IB through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43112IB 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 ISL43112IB reliable?
The price and inventory of ISL43112IB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43112IB is usually 5 days.
3.What payment methods are accepted for ISL43112IB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43112IB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43112IB?
ISL43112IB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43112IB 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 ISL43112IB?
For technical support, including ISL43112IB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43112IB requirements.
6.How does Aetrix verify that ISL43112IB is sourced from the original manufacturer or authorized distributors?
All ISL43112IB 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 ISL43112IB meets industry standards.
7.What is the process for return or replacement of ISL43112IB?
All ISL43112IB units undergo pre-shipment inspection (PSI). If there is an issue with ISL43112IB, 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 ISL43112IB part is unused and in its original packaging.
Return procedure for ISL43112IB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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