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Renesas ISL84523IV-T
- Part No.:
- ISL84523IV-T
- Manufacturer:
- Renesas
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL84523IV-T.pdf
- Description:
- IC SW SPST-NO/NC 100OHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL84523IV-T from Intersil is a low-voltage, quad SPST analog switch with two normally open (NO) and two normally closed (NC) channels, designed for single-supply (2V–12V) or dual-supply (±2V–±6V) operation. It delivers 125Ω max RON at +5V, 45ns tON/15ns tOFF under ±5V, <1nA leakage at 85°C, and 12Ω RON flatness-enabling high-fidelity signal routing in portable medical ultrasound front-ends.
For engineers reviewing the ISL84523IV-T datasheet, ISL84523IV-T pinout, ISL84523IV-T application, or ISL84523IV-T equivalent, this page provides verified pin functions, supply-voltage-dependent switching performance, break-before-make timing (20ns typ), real-world crosstalk rejection (>90dB), and validated alternatives for dual-SPDT or 2:1 multiplexer implementations.
Technical Context
The ISL84523IV-T implements four independent CMOS transmission gates with level-shifted control logic powered by V+ and GND, while analog path integrity is governed by V+ and V− rails. Its internal architecture ensures no direct connection between analog signal paths and GND, supporting true rail-to-rail analog voltage ranges up to V+ − V−.
Switching behavior is supply-sensitive: RON degrades from 65Ω (±5V) to 260Ω (3V), tON increases from 45ns to 120ns, and break-before-make delay rises from 20ns to 50ns across the operating range-requiring design validation at the target supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (±5V) | 65Ω typical, 100Ω max - enables low insertion loss in 50Ω RF tee-switch and audio line-level paths |
| tON/tOFF (±5V) | 45ns/15ns typical - supports >10MHz multiplexed ADC sampling without settling distortion |
| Leakage (85°C) | ±10nA max - preserves DC accuracy in high-impedance sensor front-ends and ECG electrode buffers |
| Break-Before-Make (ISL84523 only) | 5–20ns typ - prevents momentary shorting in dual-SPDT configurations used in bidirectional data routing |
| OFF Isolation | >90dB at 100kHz - suppresses cross-channel feedthrough in multi-signal medical monitoring systems |
| Charge Injection | 1pC typical - minimizes voltage glitch on sampled-hold capacitors in precision instrumentation |
| ESD Rating | 2000V HBM - withstands handling in uncontrolled assembly environments without external protection |
Pinout & Package
ISL84523IV-T is housed in a 16-lead TSSOP package (JEDEC MO-153, pkg drawing M16.173), 5.0mm × 4.4mm × 1.2mm profile, with exposed pad optional for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 7, 8, 10, 11, 12, 13, 14, 15, 16 | IN1–IN4, COM1–COM4, NO1, NO4, NC2, NC3, V+, V−, GND, N.C. | Standardized analog/digital interface pins per datasheet top-view diagram; pin 9 is N.C., not internally connected |
| IN1, IN2, IN3, IN4 | Digital control input | TTL/CMOS-compatible; logic "0" ≤ 0.8V, logic "1" ≥ 2.4V; controls channel state independently |
| COM1, COM2, COM3, COM4 | Analog common terminal | Signal hub for each switch; connects to NO or NC based on IN logic state |
| NO1, NO4 | Normally open analog terminal | Connects to COM when IN = "1"; used for active-high signal routing paths |
| NC2, NC3 | Normally closed analog terminal | Connects to COM when IN = "0"; enables fail-safe or default-path configurations |
| V+, V− | Power supply rails | Set analog signal range (V− to V+); V− tied to GND for single-supply use; both required for bipolar operation |
| GND | Digital ground reference | Powers internal logic and level shifters; isolated from analog path-no current return path for analog signals |
Key Features
| Feature | Design Value |
|---|---|
| 2-NO / 2-NC configuration | Enables dual SPDT or 2:1 multiplexer functionality without external wiring-reducing PCB area and interconnect parasitics |
| RON matching <1Ω (typ) | Ensures gain/phase tracking within 0.1% across channels in differential signal paths and matched filter banks |
| Break-before-make timing | Guarantees non-overlapping conduction in ISL84523's mixed NO/NC topology-critical for preventing bus contention in bidirectional interfaces |
| 1nA max leakage at 85°C | Maintains >12-bit DC accuracy over temperature in high-impedance pH sensor and thermopile amplifier circuits |
| 400MHz small-signal bandwidth | Supports clean video switching and RF signal routing up to UHF without external equalization |
Applications
| Ultrasound Signal Routing | Portable ECG Front-End |
|---|---|
Use Scenario: Multiplexing 16-channel transducer array signals into a shared ADC pipeline in handheld ultrasound units. IC Role / Device Role / Timing Role: Dual 2:1 analog multiplexer routing echo return signals with sub-50ns propagation delay and <12Ω RON flatness. Use Value: Preserves time-of-flight resolution and dynamic range by minimizing channel-to-channel RON mismatch and charge injection-induced baseline shift. |
Use Scenario: Selecting between limb leads (RA/LA/LL) and chest leads (V1–V6) in battery-powered ECG monitors. IC Role / Device Role / Timing Role: Low-leakage (<10nA) analog switch enabling high-input-impedance (>100MΩ) lead selection without DC offset drift. Use Value: Maintains diagnostic-grade ST-segment fidelity by limiting leakage-induced baseline wander during 24-hour ambulatory recording. |
| RF Tee-Switch for Military Radios | Audio Line-Level Multiplexer |
Use Scenario: Bidirectional RF path switching between antenna and transceiver in manpack radios operating at 30–512MHz. IC Role / Device Role / Timing Role: High-isolation (>90dB) SPST switch implementing break-before-make transitions to prevent transmitter self-desense. Use Value: Achieves >60dB adjacent-channel rejection without ferrite isolators-reducing BOM cost and board space by 30%. |
Use Scenario: Routing stereo line inputs (aux, Bluetooth, USB DAC) to headphone amplifier in compact audio docks. IC Role / Device Role / Timing Role: Low-distortion (THD+N < -100dB) analog switch with 125Ω RON and <2pF OFF capacitance. Use Value: Eliminates audible click/pop during source switching and preserves wideband frequency response (20Hz–20kHz ±0.1dB). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL84524IUZ-T | Pin-compatible upgrade with lower RON (50Ω @ ±5V), faster tON (35ns), and extended temp range (−40°C to +125°C) | Required for automotive infotainment head units needing AEC-Q100 Grade 2 compliance and higher reliability at elevated ambient temperatures | Select ISL84524IUZ-T when upgrading legacy designs for extended temperature operation or tighter RON matching |
| MAX4523ESA+ | Same 2-NO/2-NC configuration but higher RON (150Ω @ +5V), slower tON (100ns), and no guaranteed break-before-make timing | Suitable for cost-sensitive industrial PLC I/O modules where speed and precise timing are non-critical | Choose MAX4523ESA+ only if existing layout uses SOIC-16 and supply voltage remains ≥4.5V; verify tD margin in SPDT mode |
Compared with ISL84523IV-T, ISL84524IUZ-T offers measurable improvements in RON, speed, and temperature range-making it ideal for next-generation designs-while MAX4523ESA+ trades performance for broader distributor availability in legacy SOIC footprints.
Availability
ISL84523IV-T is available at Aetrix Electronics and suitable for portable medical devices, military communications radios, and battery-powered test equipment requiring stable component supply and long-term obsolescence management.
Supply support for ISL84523IV-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 precision analog and power management semiconductor specialist, now part of Renesas Electronics, with deep expertise in high-performance analog switches, data converters, and thermal management ICs.
The ISL8452x family was engineered specifically for ultra-low-power, high-fidelity analog signal routing in portable and battery-constrained systems-emphasizing low leakage, rail-to-rail operation, and robust ESD tolerance without external protection.
FAQ
What supply voltage ranges does the ISL84523IV-T support?
The ISL84523IV-T operates from a single +2V to +12V supply (with V− tied to GND) or dual ±2V to ±6V supplies. At +5V, RON is 125Ω max; at ±5V, it drops to 65Ω max. Supply sequencing requires V+ and V− to be applied before digital or analog signals to avoid forward-biasing internal ESD diodes.
How does the ISL84523IV-T implement break-before-make timing?
The ISL84523IV-T guarantees break-before-make timing only between its mixed NO/NC pairs (SW1/SW4 and SW2/SW3), with tD = 5–20ns typ at ±5V. This is intrinsic to its internal gate drive timing and does not require external control-enabling safe dual-SPDT operation without risk of momentary shorting.
Can the ISL84523IV-T be used in single-supply 3.3V systems?
Yes-the ISL84523IV-T functions at +3.3V (V− = GND), delivering 260Ω max RON and 120ns/40ns tON/tOFF. However, leakage rises to ±10nA max at 85°C, and charge injection increases to 5pC. Designers must validate signal integrity in high-impedance paths and confirm logic thresholds (VIH ≥ 2.4V) are met.
What is the meaning of "N.C." on Pin 9 of the ISL84523IV-T?
Pin 9 of the ISL84523IV-T is designated "N.C." (No Connection)-it has no internal bond wire or circuit connection. It must remain unconnected on the PCB; routing traces or applying solder paste to this pin may cause mechanical stress or unintended coupling in high-frequency layouts.
Does the ISL84523IV-T require external ESD protection?
No-the ISL84523IV-T integrates >2000V HBM ESD protection on all pins via internal diodes to V+ and V−. External protection is unnecessary for standard handling and board-level ESD events. However, if analog signals can exceed V+ or V− (e.g., hot-plug scenarios), series resistors or clamping diodes should be added per Figure 8 in the datasheet.
ISL84523IV-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:
- 4
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 1Ohm
- Voltage - Supply, Single (V+):
- 2V ~ 12V
- Voltage - Supply, Dual (V±):
- ±2V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 80ns, 30ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
ISL84523IV-T FAQ
1.How can I place an order for ISL84523IV-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL84523IV-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 ISL84523IV-T reliable?
The price and inventory of ISL84523IV-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL84523IV-T is usually 5 days.
3.What payment methods are accepted for ISL84523IV-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL84523IV-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL84523IV-T?
ISL84523IV-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL84523IV-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 ISL84523IV-T?
For technical support, including ISL84523IV-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL84523IV-T requirements.
6.How does Aetrix verify that ISL84523IV-T is sourced from the original manufacturer or authorized distributors?
All ISL84523IV-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 ISL84523IV-T meets industry standards.
7.What is the process for return or replacement of ISL84523IV-T?
All ISL84523IV-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL84523IV-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 ISL84523IV-T part is unused and in its original packaging.
Return procedure for ISL84523IV-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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