ISL8323IB - Dual 60 Ohm SPST Analog Switch | Renesas
MPN: ISL8323IB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.47 | $3.47 |
| 10 | $3.12 | $31.20 |
| 100 | $2.69 | $269.00 |
| 500 | $2.25 | $1,125.00 |
| 1,000 | $1.98 | $1,980.00 |
| 2,500 | $1.72 | $4,300.00 |
ISL8323IB Overview
An analog switch is an integrated semiconductor that controls an analog signal path with digital control logic. The switch belongs to the analog switch and multiplexer hierarchy, which sits within interface ICs and system-level signal-routing networks. Unlike a mechanical relay, an analog switch operates quickly and occupies little board area, making it suitable for portable, industrial, communications, and test equipment where supply voltage, signal integrity, leakage, and on-resistance determine performance.
The ISL8323IB family is described as precision dual analog switches for single-supply systems, including battery-powered equipment. Verified data identifies a maximum off leakage of 100 pA, off-state channel capacitance of 9 pF, and charge injection of 5 pC maximum per channel. Crosstalk is specified as -85 dB at 1 MHz, indicating strong isolation between the switched paths. The operating temperature range is -40°C to +85°C, and the 8-SOIC package uses surface-mount assembly.
The 60 ohm on-resistance balances conduction loss against low-voltage signal operation, while 9 pF off capacitance and 100 pA leakage help preserve high-impedance sources when a channel is open. Because the part is intended for a single supply, system designers should verify input and control-signal levels against the manufacturer datasheet before assigning logic thresholds or bipolar signals.
Typical uses include battery-powered measurement systems, analog signal routing in test equipment, communication interfaces, and compact embedded control platforms. The low 9 pF off capacitance is particularly useful when the switch connects to high-impedance sensors or amplifiers, while the -85 dB crosstalk specification supports isolated routing of moderate-bandwidth signals.
The main design consideration is to verify supply and logic levels, control-pin polarity, and signal amplitude in the datasheet. Place the device close to the signal source when switching high-impedance nodes to minimize parasitic capacitance, and use a ground reference and controlled layout to prevent injected noise from appearing across the open switch.
This page combines verified distributor specifications, package and lifecycle details, comparison information, and practical design guidance. It is intended to help engineers identify whether the ISL8323IB is suitable for a new analog-routing design and to locate its datasheet before committing to a PCB layout.
Drop-in alternatives for ISL8323IB — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISL8323IBZ-T
✅ Drop-In📋 Reference alternative (not in catalog)
ISL8323IB Maximum Ratings & Electrical Characteristics
| Number of Circuits | 2 circuits |
| Switch Configuration | 2 x SPST, 1:1 |
| On Resistance | 60 ohm |
| Supply Type | Single supply |
| Low-Voltage Supply Range | Single to +12 V |
| Charge Injection | 5 pC maximum per channel |
| Off-State Channel Capacitance | 9 pF |
| Off Leakage Current | 100 pA maximum |
| Crosstalk | -85 dB at 1 MHz |
| Operating Temperature | -40°C to +85°C |
| Package | 8-SOIC, 0.154 inch (3.90 mm) width |
| Mounting Type | Surface mount |
| Carrier Type | Reel |
| Minimum Order Quantity | 2500 units |
| RoHS Compliance | Compliant |
| REACH Compliance | Compliant |
ISL8323IB Pin Configuration
| Pin 1 | IN1 — Input terminal for analog switch channel 1 |
| Pin 2 | IN2 — Input terminal for analog switch channel 2 |
| Pin 3 | NC — Not connected (per datasheet) |
| Pin 4 | INH — Enable control input for the analog switches |
| Pin 5 | V+ — Positive supply input |
| Pin 6 | GND — Ground reference |
| Pin 7 | COM2 — Common terminal for analog switch channel 2 |
| Pin 8 | COM1 — Common terminal for analog switch channel 1 |
Typical Applications
ISL8323IB is suitable for 6 applications: Battery-Powered Sensor Signal Routing, Portable Test and Measurement Equipment, Communication Interface Isolation, Industrial Control Signal Multiplexing, Audio Signal Routing and Isolation, Data Acquisition Front-End Protection.
Battery-Powered Sensor Signal Routing
The ISL8323IB fits battery-powered sensor platforms because it operates from a single supply in the documented single-to-+12 V range and provides two independent SPST paths. Its 100 pA maximum off leakage and 9 pF off capacitance help preserve high-impedance sensor outputs when a channel is disconnected. Place one switch at the sensor interface to isolate an amplifier or test point, and use the other channel for an alternate measurement path. The 60 ohm on-resistance is suitable for many low-frequency sensor signals, while the -85 dB crosstalk at 1 MHz helps prevent channel-to-channel coupling. Verify control levels and signal swing against the datasheet because those values are not present in the verified search extract.
Recommended
Portable Test and Measurement Equipment
The ISL8323IB is useful in portable test equipment that must route a probe or calibration node between two circuits without using a mechanical relay. The dual SPST configuration provides independent isolation paths in an 8-SOIC package, while the 60 ohm resistance adds limited insertion loss for typical low-impedance measurement sources. Its 5 pC maximum charge injection should be checked against sensitive front ends, while 9 pF off capacitance helps minimize coupling into high-impedance nodes. A practical design uses one channel for DUT selection and the other for a calibration path, with the switch placed near the probe connector to limit pickup from adjacent digital circuitry.
Recommended
Communication Interface Isolation
The ISL8323IB can isolate two communication-interface branches when a system requires independent routing or active disconnection of a moderate-bandwidth signal. The verified -85 dB crosstalk at 1 MHz supports separation between channels at that frequency, and the 60 ohm on-resistance provides a defined path impedance. In a line-card or transceiver-adjacent design, one SPST channel may disconnect an external connector while the second connects a test or protection path. Care is needed at higher frequencies because the 9 pF off capacitance and board parasitics increase coupling, so keep traces short and maintain a continuous ground reference beneath the switched path.
Recommended
Industrial Control Signal Multiplexing
The ISL8323IB suits compact industrial-control modules that need to switch low-voltage analog control or feedback signals rather than multiplex many high-speed lanes. Its two 1:1 SPST channels can connect separate field-side and service-side nodes, and the -40°C to +85°C operating range supports industrial temperature conditions. The single-supply architecture simplifies compatibility with embedded 3.3 V or 5 V systems, subject to control-threshold verification. Because the on-resistance is 60 ohm, designers should check the source impedance and load current; the switch is most appropriate for moderate-current, low-frequency signal paths rather than power switching.
Recommended
Audio Signal Routing and Isolation
The ISL8323IB can route or isolate a low-level audio or instrumentation signal when channel count is modest and insertion loss must remain controlled. The dual SPST structure allows one microphone or auxiliary input to be disconnected from an amplifier while another source is connected, and the 60 ohm on-resistance is compatible with many line-level audio paths. The -85 dB crosstalk at 1 MHz and 9 pF off capacitance help reduce unwanted coupling between switched sources. Keep the layout away from switching regulators and digital clocks, verify the control thresholds, and confirm that the application does not require rail-to-rail bipolar switching beyond the manufacturer's stated limits.
Recommended
Data Acquisition Front-End Protection
The ISL8323IB can place an isolated SPST path between a sensor or external source and an ADC input, allowing a design to disconnect rather than actively clamp a signal. This is useful in multi-range data-acquisition systems where source impedance is high and leakage can disturb the measurement. The verified 100 pA maximum off leakage and 9 pF off capacitance support high-impedance use, but the 60 ohm on-resistance should remain small relative to the source and ADC input impedances. Designers should also evaluate 5 pC charge injection against acquisition timing, use short guard traces, and select the analog switch close to the converter input.
Recommended
Recommended Products Summary
Engineering reference data for ISL8323IB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISL8323IBZ-T |
|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics |
| Package | 8-SOIC | 8-SOIC - same |
| Number of Circuits | 2 circuits | 2 circuits |
| Switch Configuration | 2 x SPST, 1:1 | 2 x SPST, 1:1 |
| On Resistance | 60 ohm | 60 ohm |
| Charge Injection | 5 pC maximum per channel | 5 pC maximum per channel |
| Off-State Channel Capacitance | 9 pF | 9 pF |
| Off Leakage Current | 100 pA maximum | 100 pA maximum |
| Crosstalk | -85 dB at 1 MHz | -85 dB at 1 MHz |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C |
Key Differentiators
- Directly verified same-package ordering option (vs ISL8323IBZ-T)
- Low off-state loading for high-impedance nodes (vs ISL8323IBZ-T)
- Compact independent dual-SPST routing (vs ISL8323IBZ-T)
Design Notes
Place the ISL8323IB close to the high-impedance source and load it controls. The verified 9 pF off-state capacitance is favorable for leakage-sensitive nodes, but PCB trace capacitance can dominate when total input capacitance is only a few picofarads. Keep switched traces short, avoid running them beneath unrelated digital routes, and provide a nearby ground reference so switching transients do not couple into the measured signal.
Do not treat the 60 ohm on-resistance as power-switch capability. It is suitable for routing low-level analog signals, but voltage drop becomes significant when a load draws current through the switch. Check the source impedance, load current, allowable signal excursion, control thresholds, and absolute maximum ratings in the manufacturer datasheet. Also evaluate the 5 pC maximum charge injection if the output feeds a sampling capacitor or high-gain amplifier.
Use the 8-SOIC land pattern and pin arrangement defined by the manufacturer datasheet, and keep both supply and ground connections short. Route control inputs away from analog terminals to minimize capacitive injection. For isolation between channels, maintain symmetric or guarded routing where practical and keep return current continuous beneath the signal path. Validate the final board with leakage, crosstalk, and transient measurements because package parasitics and PCB leakage can materially change performance.
Compliance Information
RoHS and REACH compliance are stated in the verified comparison data. No verified automotive qualification, lead-free declaration, halogen-free declaration, or conflict-minerals statement was supplied.
