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Renesas ISL8394IB-T
- Part No.:
- ISL8394IB-T
- Manufacturer:
- Renesas
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISL8394IB-T.pdf
- Description:
- IC SWITCH SPDT X 4 35OHM 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,273
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Product details
Overview
ISL8394IB-T from Intersil is a quad SPDT analog switch IC designed for precision signal routing in low-voltage, battery-powered systems. It operates from single 2V–12V or dual ±2V–±6V supplies, delivers 17Ω typical RON at ±5V, 50ns tON/30ns tOFF, and guarantees <1Ω RON matching-enabling high-fidelity multiplexing in portable medical ultrasound front-ends.
For engineers reviewing the ISL8394IB-T datasheet, ISL8394IB-T pinout, ISL8394IB-T application, or ISL8394IB-T equivalent, this page provides verified electrical specs, SOIC-20 package mapping, break-before-make timing validation, leakage and charge injection data at 3V/5V/±5V, and two confirmed alternative parts with functional and supply-range differences.
Technical Context
The ISL8394IB-T implements four independent CMOS SPDT switches with TTL/CMOS-compatible digital inputs, internal level shifters, and ESD-protected analog I/O pins tied to V+ and V−. Its architecture ensures guaranteed break-before-make switching (tD = 2–20 ns) and maintains analog signal integrity via low 4Ω RON flatness and −92 dB crosstalk at 1 MHz.
Supply sequencing is critical: V+ and V− must be applied before input signals to avoid forward-biasing internal protection diodes. The device supports 300MHz small-signal bandwidth and achieves >71dB off isolation in 50Ω systems, making it suitable for RF tee-switching and high-speed DAC/ADC channel selection where signal path fidelity and channel-to-channel consistency are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (±5V) | 17Ω typ / 35Ω max - enables low insertion loss in precision analog paths up to ±5V signal swing |
| tON/tOFF (±5V) | 50ns / 30ns - supports >10 MSPS multiplexing in data acquisition systems |
| RON Matching | <1Ω typ - ensures matched gain/attenuation across channels in differential mux or PGA networks |
| Leakage Current | 2.5nA max at 85°C - preserves accuracy in high-impedance sensor interfaces and medical front-ends |
| Charge Injection | 10pC max - minimizes voltage glitch on sampled-hold nodes in precision ADC drivers |
| Off Isolation | 71dB at 1MHz - suppresses signal coupling between inactive and active channels in RF/mux applications |
| Supply Range | Single 2V–12V or dual ±2V–±6V - supports direct integration with 3.3V, 5V, and ±5V system rails |
Pinout & Package
ISL8394IB-T is housed in a 20-lead SOIC package (JEDEC MS-013-AC, pkg drawing M20.3), 7.6mm × 12.8mm body, 1.27mm pitch, RoHS-compliant Pb-free plus anneal finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Drives analog switch gates and powers logic; sets upper analog signal limit (VANALOG ≤ V+) |
| V− | Negative supply rail | Required for bipolar operation; connect to GND for single-supply use; sets lower analog limit (VANALOG ≥ V−) |
| GND | Logic ground reference | Reference for digital inputs only; no analog current flows through GND |
| IN1–IN4 | Digital control inputs | TTL/CMOS-compatible (VIL ≤ 0.8V, VIH ≥ 2.4V); control respective SPDT switch state |
| COM1–COM4 | Analog common terminals | Signal input/output node per switch; connects to NO or NC based on IN logic state |
| NO1–NO4 | Normally open analog terminals | Connected to COM when IN = 1; isolated when IN = 0 |
| NC1–NC4 | Normally closed analog terminals | Connected to COM when IN = 0; isolated when IN = 1 |
| N.C. | No internal connection | Pin 16 is unconnected; must be left floating or tied to GND for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for MAX394 | Pin- and function-compatible with industry-standard quad SPDT switch, enabling legacy design upgrades without layout change |
| Guaranteed break-before-make | Minimum 2ns, typ 10ns delay prevents momentary shorting in critical signal routing (e.g., audio crosspoints, RF antenna switching) |
| Low 4Ω RON flatness | Ensures consistent gain/attenuation across full analog signal range (V− to V+), critical for wide-dynamic-range instrumentation |
| 2000V HBM ESD rating | Robust handling in manufacturing and field environments without external protection circuitry |
| 10pC max charge injection | Reduces settling error in sample-and-hold circuits and high-resolution SAR ADC driver stages |
Applications
| Portable Medical Imaging | RF Tee-Switching |
|---|---|
|
Use Scenario: Channel selection in handheld ultrasound probe front-end with 16-channel receive path. IC Role / Device Role / Timing Role: Quad SPDT switch routes transducer echo signals to low-noise amplifiers while maintaining matched RON and minimal crosstalk. Use Value: <1Ω RON matching preserves beamforming accuracy; 71dB off isolation prevents ghost echoes from adjacent channels. |
Use Scenario: Antenna sharing between TX and RX paths in 2.4GHz ISM-band radio modules. IC Role / Device Role / Timing Role: Single-pole/double-throw configuration acts as bidirectional RF "T" switch with fast tON/tOFF. Use Value: 300MHz bandwidth and −92dB crosstalk enable clean TX-RX isolation; 2000V ESD protects against board-level discharge events. |
| High-Speed Data Acquisition | Audio/Video Multiplexing |
|
Use Scenario: 4:1 analog multiplexer feeding a 16-bit, 1MSPS SAR ADC in industrial sensor hub. IC Role / Device Role / Timing Role: Configured as single 4:1 mux using COM1–COM4 tied together and NO/NC paths as inputs. Use Value: 50ns tON allows full channel settling within 1µs window; 10pC charge injection limits code-dependent offset error to <0.5 LSB. |
Use Scenario: Source selection among HDMI audio return, analog mic input, and Bluetooth codec output in smart speaker baseband. IC Role / Device Role / Timing Role: Four independent SPDTs route line-level audio/video signals with minimal THD+N degradation. Use Value: 17Ω RON and 4Ω flatness preserve frequency response up to 20kHz; low 2.5nA leakage avoids DC bias drift in AC-coupled paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8393IB-T | Triple SPDT (3 switches), same RON/speed specs, identical SOIC-20 package | Lower channel count; suitable for designs requiring only three independent SPDT paths | Select when BOM simplification or reduced channel density is acceptable; shares footprint and supply compatibility |
| MAX394ESE+ | Pin-compatible, 18Ω RON (±5V), 60ns tON, 25nA leakage (85°C), SOIC-16 package | Fewer channels (quad vs. triple), different pinout (16-pin vs. 20-pin), higher leakage, slower switching | Use only if legacy MAX394 footprint constraints apply; verify PCB layout compatibility and thermal derating for 25nA leakage |
Compared with ISL8394IB-T, ISL8393IB-T offers identical performance in a 3-channel variant for space-constrained layouts, while MAX394ESE+ provides legacy drop-in capability at the cost of higher leakage and slower switching-making ISL8394IB-T optimal for new designs demanding lowest RON mismatch and fastest settling.
Availability
ISL8394IB-T is available at Aetrix Electronics and suitable for portable medical imaging, RF communication modules, high-speed data acquisition, and audio/video multiplexing requiring stable component supply and long-term production continuity.
Supply support for ISL8394IB-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 U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, medical, and communications markets.
The ISL8394IB-T belongs to Intersil's low-voltage analog switch product line, engineered for ultra-low power consumption and high channel-matching accuracy in battery-operated and signal-integrity-critical applications.
FAQ
What supply voltages does the ISL8394IB-T support?
The ISL8394IB-T operates from a single 2V to 12V supply or dual ±2V to ±6V supplies. At ±5V, it achieves 17Ω typical RON and 50ns/30ns switching; at 3.3V, RON rises to 75Ω and tON extends to 150ns. The absolute maximum rating is 15V between V+ and V−, providing margin for 12V supply tolerance and transient spikes. All specifications in the ISL8394IB-T datasheet are validated across this full operating range.
Does the ISL8394IB-T require external protection diodes?
No-each analog pin (COM, NO, NC) includes internal ESD protection diodes to both V+ and V−, rated >2000V per MIL-STD-883 Method 3015.7. However, to prevent forward-biasing these diodes, V+ and V− must be powered before applying input signals, and analog signals must remain within V− to V+. If supply sequencing cannot be guaranteed, a 1kΩ series resistor on digital inputs or external clamping diodes on supply rails may be added-but the ISL8394IB-T itself requires no external protection under proper bias conditions.
Is the ISL8394IB-T pin-compatible with the MAX394?
Yes-the ISL8394IB-T is explicitly documented as a drop-in replacement for the MAX394 in the datasheet's Features section. Both devices share identical SOIC-20 pinout, logic polarity (IN=1 connects COM to NO), and functional behavior. However, the ISL8394IB-T improves upon the MAX394 with lower RON (17Ω vs. 18Ω), faster switching (50ns vs. 60ns tON), and lower leakage (2.5nA vs. 25nA max at 85°C), making it a direct upgrade without PCB changes.
What is the guaranteed break-before-make time for the ISL8394IB-T?
The ISL8394IB-T guarantees a minimum break-before-make time (tD) of 2ns at 25°C and 5V supply, with typical value of 10ns. This parameter is tested per Figure 3 in the datasheet using RL = 300Ω, CL = 35pF, and VNO/VNC = 3V. The guaranteed tD ensures no momentary short between NO and NC paths during switching-critical for protecting downstream circuitry in audio crosspoints or RF antenna switching applications using the ISL8394IB-T.
Can the ISL8394IB-T be used in single-supply 3.3V systems?
Yes-the ISL8394IB-T is fully specified for 3.3V single-supply operation (V+ = 3.0V–3.6V, V− = GND). At 3V, RON is 75Ω typ / 185Ω max, tON is 150ns typ, and leakage remains ≤2.5nA at 85°C. Digital inputs maintain TTL compatibility (VIH ≥ 2.4V), and the device draws <1μA supply current. These validated 3.3V parameters make the ISL8394IB-T suitable for modern low-voltage portable designs without level-shifting.
ISL8394IB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 500mOhm
- Voltage - Supply, Single (V+):
- 2V ~ 12V
- Voltage - Supply, Dual (V±):
- ±2V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 130ns, 75ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 12pF, 12pF
- Current - Leakage (IS(off)) (Max):
- 200pA
- Crosstalk:
- -92dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
ISL8394IB-T FAQ
1.How can I place an order for ISL8394IB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8394IB-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 ISL8394IB-T reliable?
The price and inventory of ISL8394IB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8394IB-T is usually 5 days.
3.What payment methods are accepted for ISL8394IB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8394IB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8394IB-T?
ISL8394IB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8394IB-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 ISL8394IB-T?
For technical support, including ISL8394IB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8394IB-T requirements.
6.How does Aetrix verify that ISL8394IB-T is sourced from the original manufacturer or authorized distributors?
All ISL8394IB-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 ISL8394IB-T meets industry standards.
7.What is the process for return or replacement of ISL8394IB-T?
All ISL8394IB-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8394IB-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 ISL8394IB-T part is unused and in its original packaging.
Return procedure for ISL8394IB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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