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Renesas ISL5123IBZ-T
- Part No.:
- ISL5123IBZ-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL5123IBZ-T.pdf
- Description:
- IC SWITCH SPDT X 1 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,675
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Product details
Overview
ISL5123IBZ-T from Intersil is a low-voltage, single-supply, committed SPDT analog switch designed for 2-to-1 multiplexer applications. It operates from +2.7V to +12V, delivers 19Ω ON-resistance at 5V, 28ns turn-on time, 20ns turn-off time, and guarantees break-before-make switching. It is used in cellular phone ASIC interface expansion to add analog signal routing without redesigning baseband ICs.
For engineers reviewing the ISL5123IBZ-T datasheet, ISL5123IBZ-T pinout, ISL5123IBZ-T application, or ISL5123IBZ-T equivalent, key selection criteria include guaranteed break-before-make timing, low charge injection (≤5pC), SOT-23-8 package compatibility, and operation across 3.3V/5V/12V supply rails with full -40°C to +85°C temperature range support.
Technical Context
The ISL5123IBZ-T implements a fully integrated CMOS SPDT switch with dedicated NO, NC, and COM terminals per channel and internal level-shifting logic that accepts TTL/CMOS inputs (VINH ≥2.4V, VINL ≤0.8V) across its full supply range. Its architecture ensures bidirectional analog signal flow with matched rON (≤1Ω) and minimal voltage-dependent rON flatness (≤8Ω).
Break-before-make timing is guaranteed at 3–10ns over temperature and supply, preventing momentary shorting during state transitions. All analog pins feature reverse-biased ESD diodes to V+ and GND, enabling ±2kV HBM protection while limiting analog signal excursion to within 0.3V of rail boundaries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Committed SPDT - fixed NO/NC/COM configuration optimized for 2:1 mux routing, not configurable as dual SPST. |
| rON @ 5V | 19Ω typical - enables low insertion loss in audio, video, and ADC/DAC signal paths at 5V operation. |
| tON / tOFF | 28ns / 20ns typical at 5V - supports high-speed multiplexing up to ~15MHz fundamental switching rate. |
| Charge Injection | ≤5pC max - minimizes voltage glitch on sampled-hold nodes and precision integrator reset circuits. |
| Supply Range | +2.7V to +12V - supports direct integration into 3.3V, 5V, and 12V systems without level translation. |
| Temp Range | -40°C to +85°C - qualified for industrial and extended-temperature portable equipment deployment. |
| ESD Rating | ≥2000V HBM - meets MIL-STD-883 Method 3015.7, enabling robust handling in assembly and field environments. |
Pinout & Package
ISL5123IBZ-T is housed in an 8-lead SOT-23 package (Pb-free, RoHS compliant, MSL Level 2), with pin 1 marked via bottom-side laser marking "5123 IBZ". Thermal resistance θJA is 215°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Digital control input | Accepts TTL/CMOS logic; drives internal level shifter to control SPDT state; VIH ≥2.4V, VIL ≤0.8V across full supply range. |
| 2 (V+) | Positive power supply | Single rail input (+2.7V to +12V); powers analog switches and digital logic; max 15V absolute rating. |
| 3 (GND) | Ground reference | Return path for analog and digital circuitry; substrate tied to GND; required for ESD diode biasing. |
| 4 (NO) | Normally open switch terminal | Open-circuit when IN = 0; connects to COM when IN = 1; rated for ±0.3V beyond rails due to internal clamping diodes. |
| 5 (COM) | Common analog port | Center node of SPDT; bidirectional signal path; supports full analog range 0V to V+; CCOM(ON) = 28pF at 1MHz. |
| 6 (NC) | Normally closed switch terminal | Closed to COM when IN = 0; opens when IN = 1; same voltage/current ratings as NO pin. |
| 7 (N.C.) | No internal connection | Unbonded pad; must be left floating or tied to GND for mechanical stability; no electrical function. |
| 8 (N.C.) | No internal connection | Unbonded pad; identical to pin 7; no routing or termination required beyond standard SOT-23 layout rules. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | 3–10ns delay prevents signal shorting during transition - critical for protecting downstream amplifiers and ADC inputs. |
| Low leakage current | ≤10nA max COM OFF leakage - preserves accuracy in high-impedance sensor interfaces and sample-and-hold circuits. |
| Low power consumption | <5µW quiescent - extends battery life in handheld medical and communication devices. |
| High off isolation | 76dB at 1MHz - suppresses crosstalk between channels in multi-signal routing applications like ultrasound front-ends. |
| Wide supply compatibility | Fully specified at 3.3V, 5V, and 12V - eliminates need for external regulators in mixed-rail systems. |
Applications
| Cellular Phone ASIC Interface Expansion | Ultrasound Signal Path Multiplexing |
|---|---|
Use Scenario: Adding analog I/O capability to baseband ASICs with limited GPIO/analog pin count in compact smartphone designs. IC Role / Device Role / Timing Role: SPDT analog switch providing 2:1 signal selection between two sensors or transducers and a shared ADC input. Use Value: Enables functional expansion without ASIC respin; leverages 28ns switching to support >10MHz sampling rates in RF front-end calibration paths. | Use Scenario: Routing multiple transducer signals to a common receive chain in portable ultrasound probes. IC Role / Device Role / Timing Role: High-isolation SPDT switch managing transmit/receive path selection with guaranteed break-before-make timing. Use Value: 76dB off-isolation prevents echo interference; 19Ω rON maintains signal fidelity across 1–15MHz bandwidth. |
| Portable ECG Front-End Channel Selection | +3V/+5V DAC Output Switching Network |
Use Scenario: Selecting between lead configurations (I, II, III, aVR, aVL, aVF) in battery-powered electrocardiograph units. IC Role / Device Role / Timing Role: Low-leakage SPDT switch routing microvolt-level biopotential signals to instrumentation amplifier inputs. Use Value: ≤10nA leakage avoids baseline drift; 5pC charge injection prevents step errors in high-gain DC-coupled stages. | Use Scenario: Dynamically selecting between multiple DAC outputs driving different analog subsystems in industrial controllers. IC Role / Device Role / Timing Role: Precision SPDT switch enabling fast reconfiguration of analog output channels without software-controlled GPIO toggling. Use Value: 19Ω rON matching (≤1Ω) ensures consistent gain scaling; 215°C/W θJA allows operation in thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL5120IHZ-T | Dual SPST NO configuration; no NC pin; lacks break-before-make guarantee; same 8-lead SOT-23 package and 19Ω rON at 5V. | Suitable only where independent channel control is needed, not true SPDT functionality. | Select ISL5120IHZ-T only if dual independent switches are required and break-before-make is unnecessary. |
| TMUX1574RTER | 4-channel SPDT, 10Ω rON at 5V, 10ns tON, but requires dual supply (±2.5V) or level-shifting for single 3.3V logic interface. | Designed for higher channel density and lower rON, but incompatible with direct 3.3V/5V logic drive without external circuitry. | Choose TMUX1574RTER only when lower rON and faster switching justify added board area and level-shift complexity. |
Compared with ISL5123IBZ-T, ISL5120IHZ-T provides no SPDT functionality or break-before-make assurance, while TMUX1574RTER offers superior speed and rON but demands dual supplies or interface adaptation - making ISL5123IBZ-T the optimal choice for drop-in 2:1 mux replacement in existing 3.3V/5V/12V single-supply designs.
Availability
ISL5123IBZ-T is available at Aetrix Electronics and suitable for cellular phone interface expansion, portable medical device signal routing, and industrial DAC output switching requiring stable component supply and long-term lifecycle support.
Supply support for ISL5123IBZ-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 semiconductor manufacturer specializing in precision analog and power management solutions, now part of Renesas Electronics since 2017.
The ISL512x family was engineered for low-voltage, single-supply analog signal routing in space-constrained portable electronics, emphasizing low rON, fast switching, and guaranteed break-before-make behavior in SPDT configurations.
FAQ
What is the guaranteed break-before-make time for ISL5123IBZ-T?
The ISL5123IBZ-T guarantees a break-before-make time delay (tD) of 3ns minimum to 10ns maximum across the full operating temperature range (-40°C to +85°C) and supply voltages from 3V to 12V. This specification is explicitly confirmed in the FN6022 datasheet Table "Electrical Specifications - 5V Supply" under "Break-before-make Time Delay (ISL5122, ISL5123), tD", and applies directly to ISL5123IBZ-T as a committed SPDT variant. The timing ensures no overlap between NO and NC conduction states.
Does ISL5123IBZ-T support 3.3V logic control with a 5V analog supply?
Yes, ISL5123IBZ-T supports 3.3V logic control with a 5V analog supply. Its digital inputs are TTL/CMOS compatible with VIH ≥2.4V and VIL ≤0.8V across all supply voltages from 2.7V to 12V. When V+ = 5V, the input thresholds remain unchanged, allowing direct interface to 3.3V microcontrollers or FPGAs without level shifters. This is verified in the "Digital Input Characteristics" section of the FN6022 datasheet, which specifies VINH and VINL independently of V+.
What is the maximum analog signal voltage range supported by ISL5123IBZ-T?
The ISL5123IBZ-T supports an analog signal range from 0V to V+, where V+ is the positive supply voltage (2.7V to 12V). Signals exceeding this range by more than 0.3V forward-bias internal ESD protection diodes, potentially causing excessive current. This is documented in the Absolute Maximum Ratings table ("Input Voltages: NO, NC … -0.3 to ((V+) + 0.3V)") and reinforced in the "Leakage Considerations" section of the FN6022 datasheet. For V+ = 5V, the safe analog range is 0V to 5V.
Is ISL5123IBZ-T pin-compatible with ISL5122IBZ-T?
No, ISL5123IBZ-T is not pin-compatible with ISL5122IBZ-T. Although both use the 8-lead SOT-23 package, their pin functions differ: ISL5122IBZ-T (dual SPST NO/NC) assigns pin 4 to NO1 and pin 6 to NC2, whereas ISL5123IBZ-T (committed SPDT) uses pin 4 as NO, pin 5 as COM, and pin 6 as NC - a fundamentally different terminal mapping. This is clearly shown in the "Pin Configurations" diagrams on pages 2–3 of FN6022, confirming distinct topologies and non-interchangeable layouts.
What is the thermal resistance (θJA) of ISL5123IBZ-T in its SOT-23 package?
The ISL5123IBZ-T has a typical junction-to-ambient thermal resistance (θJA) of 215°C/W when mounted on a standard low-thermal-conductivity test board in free air, as specified in the "Thermal Information" section of the FN6022 datasheet (page 4). This value applies specifically to the 8-lead SOT-23 package (Pkg. DWG. # P8.064) and assumes no copper pour or heatsinking. Designers should use this figure for worst-case junction temperature estimation under continuous 30mA load conditions.
ISL5123IBZ-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:
- 1
- 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
ISL5123IBZ-T FAQ
1.How can I place an order for ISL5123IBZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL5123IBZ-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 ISL5123IBZ-T reliable?
The price and inventory of ISL5123IBZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL5123IBZ-T is usually 5 days.
3.What payment methods are accepted for ISL5123IBZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL5123IBZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL5123IBZ-T?
ISL5123IBZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL5123IBZ-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 ISL5123IBZ-T?
For technical support, including ISL5123IBZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL5123IBZ-T requirements.
6.How does Aetrix verify that ISL5123IBZ-T is sourced from the original manufacturer or authorized distributors?
All ISL5123IBZ-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 ISL5123IBZ-T meets industry standards.
7.What is the process for return or replacement of ISL5123IBZ-T?
All ISL5123IBZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL5123IBZ-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 ISL5123IBZ-T part is unused and in its original packaging.
Return procedure for ISL5123IBZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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