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Renesas ISL5122IBZ
- Part No.:
- ISL5122IBZ
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL5122IBZ.pdf
- Description:
- IC SW SPST-NO/NCX2 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,310
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Product details
Overview
ISL5122IBZ 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 in an 8-lead SOIC package. It operates from +2.7V to +12V, delivers 19Ω ON-resistance at 5V, 28ns turn-on time, and guarantees break-before-make switching. It is used in cellular phone ASIC signal expansion to add analog I/O without redesigning mixed-signal ICs.
For engineers reviewing the ISL5122IBZ datasheet, ISL5122IBZ pinout, ISL5122IBZ application, or ISL5122IBZ equivalent, this page provides verified electrical parameters, SOIC-8 terminal mapping, real-world use cases in portable audio/video routing and medical sensor multiplexing, and two validated alternative parts with documented functional and packaging differences.
Technical Context
The ISL5122IBZ implements dual CMOS transmission gates with independent digital control inputs (IN1, IN2), each driving one SPST switch: SW1 is NO, SW2 is NC. Its internal level shifter ensures TTL/CMOS compatibility across 2.7–12V supply range, and its break-before-make timing (3–10ns) prevents signal shorting during state transitions.
It uses Si-gate CMOS process with GND-biased substrate and integrates ESD protection diodes on all analog pins (NO, NC, COM). Leakage is dominated by reverse-biased ESD diode currents, yielding ≤10nA max OFF leakage and <5µW static power consumption at full temperature range (–40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +2.7V to +12V single supply - supports battery-powered 3.3V/5V systems and industrial 12V rails without level-shifting circuitry |
| ON Resistance (rON) | 19Ω at 5V - enables low insertion loss in precision analog signal paths up to ±5V peak |
| rON Matching | ≤1Ω between channels - ensures matched gain/attenuation in differential or dual-path applications |
| Switching Speed | tON = 28ns, tOFF = 20ns at 5V - suitable for high-speed multiplexing in ultrasound front-ends and DAC output selection |
| Charge Injection | 5pC max - minimizes voltage glitch in sample-and-hold and integrator reset circuits |
| Break-Before-Make Delay | 3–10ns - prevents momentary short-circuit between NO and NC paths during logic transitions |
| ESD Rating | ≥2000V per MIL-STD-883 Method 3015.7 - robust handling in manual assembly and field-replaceable modules |
Pinout & Package
ISL5122IBZ is housed in an 8-lead SOIC package (RoHS-compliant, JEDEC MS-012, pkg drawing M8.15), with 1.27mm pitch and -40°C to +85°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | Digital control input for SW1 (NO) | Active-high TTL/CMOS-compatible signal; drives gate of first transmission gate |
| 2 (NO1) | Normally open analog terminal for SW1 | Connects to COM1 only when IN1 = high; isolated otherwise |
| 3 (COM1) | Analog common node for SW1 | Shared path for NO1 and NC1; must be routed with controlled impedance in RF-sensitive designs |
| 4 (GND) | Ground reference | Return path for V+, digital logic, and analog signal bias; requires low-inductance connection |
| 5 (V+) | Positive supply rail | Powers internal CMOS switches and level shifters; must be decoupled with ≥0.1µF ceramic near pin |
| 6 (COM2) | Analog common node for SW2 | Shared path for NO2 and NC2; electrically isolated from COM1 |
| 7 (NC2) | Normally closed analog terminal for SW2 | Connected to COM2 when IN2 = low; disconnects when IN2 = high |
| 8 (IN2) | Digital control input for SW2 (NC) | Independent logic control; allows asynchronous switching of second SPST path |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | Prevents signal shorting during SPDT transition; validated over full –40°C to +85°C range |
| Low charge injection (5pC max) | Reduces settling error in precision sample-and-hold and ADC input conditioning networks |
| 19Ω rON with ≤1Ω matching | Enables matched dual-channel gain control in op-amp feedback networks and instrumentation amplifier calibration |
| TTL/CMOS compatible inputs | Accepts standard 0.8V/2.4V logic thresholds across entire 2.7–12V supply range - no external level translators needed |
| 8-lead SOIC package | Industry-standard footprint compatible with automated optical inspection (AOI) and reflow soldering; supports IPC Class 3 reliability |
Applications
| Portable Audio Routing | Medical Sensor Multiplexing |
|---|---|
Use Scenario: Selecting between microphone and headset audio paths in a smartphone without increasing ASIC pin count. IC Role / Device Role / Timing Role: Dual SPST analog switch acting as hardware-muxed signal router with sub-30ns switching. Use Value: Enables flexible audio architecture using existing GPIOs; eliminates need for higher-pin-count codec ICs. |
Use Scenario: Time-division multiplexing of ECG, SpO₂, and temperature sensor outputs into a single ADC channel. IC Role / Device Role / Timing Role: Precision analog switch providing low-leakage (<10nA), low-rON signal gating for biopotential signals. Use Value: Maintains signal integrity in millivolt-level biomedical measurements; avoids crosstalk-induced baseline drift. |
| Industrial DAC Output Selection | Test Equipment Signal Path Switching |
Use Scenario: Routing outputs from multiple DACs to shared analog output stages in programmable power supplies. IC Role / Device Role / Timing Role: Dual-channel SPST switch selecting between calibrated voltage references or current sources. Use Value: Achieves <1Ω rON matching to preserve DAC linearity; supports 12-bit+ accuracy in closed-loop control loops. |
Use Scenario: Reconfiguring signal paths in benchtop oscilloscope front-end to support different bandwidth or attenuation modes. IC Role / Device Role / Timing Role: High-isolation (>76dB off-isolation) analog switch enabling clean signal routing at 10MHz. Use Value: Minimizes feedthrough and crosstalk between channels during automated test sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL5120IHZ-T | Two NO switches (vs. ISL5122IBZ's NO/NC configuration); SOT-23-8 package (vs. SOIC-8); same rON, tON/tOFF, and supply specs | Requires board layout change due to different footprint and lacks guaranteed break-before-make | Select when dual-NO topology suffices and space-constrained PCBs demand SOT-23 |
| ADG721BRMZ | Single-supply operation (1.8–5.5V), 4Ω rON at 3V, 16-lead TSSOP; no break-before-make guarantee; higher leakage (100pA typ) | Not suitable for 12V systems or SPDT emulation; better for ultra-low-voltage portable designs | Choose only for 3.3V/low-power applications where smaller rON outweighs missing BbM and voltage range |
Compared with ISL5122IBZ, ISL5120IHZ-T offers identical performance but requires PCB redesign and loses SPDT capability, while ADG721BRMZ trades voltage range and BbM assurance for lower rON at 3V - making ISL5122IBZ uniquely suited for robust 5V/12V SPDT routing in medical and industrial equipment.
Availability
ISL5122IBZ is available at Aetrix Electronics and suitable for portable medical devices, industrial DAC interfaces, and test equipment signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL5122IBZ 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 company, now part of Renesas Electronics, with expertise in high-performance analog switching, data conversion, and thermal management solutions.
The ISL512x family was designed specifically for low-power, high-fidelity analog signal routing in battery-operated handheld equipment - emphasizing low rON, fast switching, and guaranteed break-before-make behavior in compact packages.
FAQ
What is the operating temperature range for ISL5122IBZ?
The ISL5122IBZ is rated for operation from –40°C to +85°C, as confirmed by its "I" grade temperature suffix and ordering information table. This extended industrial range supports deployment in automotive infotainment head units, portable diagnostic tools, and factory-floor test instruments where ambient conditions exceed commercial limits. The ISL5122IBZ maintains full specification compliance-including 19Ω rON and 28ns tON-across this entire range.
Does ISL5122IBZ support true SPDT operation?
Yes, ISL5122IBZ supports functional SPDT operation via its integrated NO/NC dual-SPST topology: when IN1 is high, NO1 connects to COM1; when IN2 is low, NC2 connects to COM2. With proper complementary control (e.g., IN2 = NOT IN1), it emulates break-before-make SPDT switching with guaranteed 3–10ns delay-validated in the datasheet's truth table and Figure 3 test circuits. This eliminates need for external logic or discrete diodes.
What is the maximum analog signal voltage allowed at ISL5122IBZ terminals?
The absolute maximum analog signal voltage at NO, NC, or COM pins is limited to –0.3V to (V+ + 0.3V), per Absolute Maximum Ratings. For a 5V supply, this permits signals from –0.3V to +5.3V. Exceeding these bounds forward-biases internal ESD diodes, risking latch-up or increased leakage. The device does not support bipolar supplies or signals extending below GND unless clamped externally.
Can ISL5122IBZ be used with a 3.3V supply?
Yes, ISL5122IBZ is fully specified at 3.3V: rON = 32Ω (typ), tON = 40ns (typ), and leakage remains ≤10nA. Its TTL/CMOS-compatible inputs accept 0.8V/2.4V thresholds at 3.3V, eliminating level shifters. However, rON increases and switching speed decreases versus 5V operation-verified in Tables on pages 5–6 of FN6022 Rev 8.00-so system timing margins must be re-evaluated.
Is ISL5122IBZ RoHS compliant and lead-free?
Yes, ISL5122IBZ is Pb-free and RoHS compliant, as explicitly stated in the Ordering Information table (Note 3) and Features section. It uses 100% matte tin (e3) termination finish and meets IPC/JEDEC J-STD-020 reflow requirements for lead-free processes. Moisture sensitivity level is Level 1 for SOIC packages, permitting indefinite floor life under dry storage conditions.
ISL5122IBZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tube
- 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
ISL5122IBZ FAQ
1.How can I place an order for ISL5122IBZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL5122IBZ 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 ISL5122IBZ reliable?
The price and inventory of ISL5122IBZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL5122IBZ is usually 5 days.
3.What payment methods are accepted for ISL5122IBZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL5122IBZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL5122IBZ?
ISL5122IBZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL5122IBZ 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 ISL5122IBZ?
For technical support, including ISL5122IBZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL5122IBZ requirements.
6.How does Aetrix verify that ISL5122IBZ is sourced from the original manufacturer or authorized distributors?
All ISL5122IBZ 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 ISL5122IBZ meets industry standards.
7.What is the process for return or replacement of ISL5122IBZ?
All ISL5122IBZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL5122IBZ, 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 ISL5122IBZ part is unused and in its original packaging.
Return procedure for ISL5122IBZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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