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Renesas ISL5123IB-T
- Part No.:
- ISL5123IB-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL5123IB-T.pdf
- Description:
- IC SWITCH SPDT X 1 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,585
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Product details
Overview
ISL5123IB-T from Intersil is a low-voltage, single-supply, committed SPDT analog switch optimized for 2-to-1 multiplexer applications. It operates from +2.7V to +12V, delivers 19Ω typical ON-resistance at 5V, 28ns turn-on time, and guarantees break-before-make switching. It is used in portable audio/video routing, medical sensor signal selection, and high-speed DAC/ADC channel switching where low charge injection (5pC max) and high off-isolation (76dB) are critical.
For engineers reviewing the ISL5123IB-T datasheet, ISL5123IB-T pinout, ISL5123IB-T application, or ISL5123IB-T equivalent, this page provides verified package mapping (6-lead SOT-23), confirmed SPDT truth table behavior, guaranteed break-before-make timing (3–10ns), leakage performance (≤5nA), and validated alternatives for 3.3V/5V/12V single-supply analog multiplexing designs.
Technical Context
The ISL5123IB-T implements a fully integrated CMOS SPDT switch with dedicated NO, NC, and COM terminals per channel and internal level-shifting logic compatible with TTL/CMOS inputs. Its architecture ensures bidirectional analog signal flow with matched rON (≤1Ω) and minimal rON flatness (≤8Ω) across the full analog range (0V to V+).
Break-before-make timing is hardware-guaranteed via internal control sequencing-critical for preventing momentary short-circuits during signal path transitions in precision instrumentation and ultrasound front-ends. The device uses Si-gate CMOS process with 58 transistors and supports overvoltage protection via integrated ESD diodes (2000V HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Committed SPDT - fixed NO/NC/COM pinout; no configuration required for 2:1 mux operation |
| rON @ 5V | 19Ω typical - enables low insertion loss in 50Ω systems and preserves signal integrity in audio/video paths |
| tON/tOFF | 28ns / 20ns @ 5V - supports >10MHz multiplexing without timing skew in sample-and-hold or ADC front-ends |
| Charge Injection | 5pC max - minimizes voltage glitch on integrator or capacitor-based circuits during switching |
| Off Isolation | 76dB @ 1MHz - suppresses crosstalk between active and inactive channels in multi-sensor systems |
| Supply Range | +2.7V to +12V - interoperable with Li-ion battery (3.3V), USB-powered (5V), and industrial rail (12V) systems |
| Leakage Current | ≤5nA max - preserves accuracy in high-impedance sensor interfaces and electrocardiograph front-ends |
Pinout & Package
ISL5123IB-T is housed in a RoHS-compliant 6-lead SOT-23 package (P6.064 drawing), optimized for space-constrained portable designs. Pin 1 = IN, Pin 2 = V+, Pin 3 = GND, Pin 4 = NO, Pin 5 = NC, Pin 6 = COM.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Digital Control Input | TTL/CMOS-compatible logic input; 0V–0.8V = OFF, 2.4V–V+ = ON; drives internal level shifter |
| V+ | Positive Supply Rail | Single power supply input (2.7–12V); sets analog signal range and switch threshold |
| GND | Ground Reference | Return path for supply and logic; substrate reference for all internal CMOS switches |
| NO | Normally Open Terminal | Connects to COM only when IN = high; used as primary signal path in default-open configurations |
| NC | Normally Closed Terminal | Connects to COM only when IN = low; provides complementary path for break-before-make operation |
| COM | Common Analog Port | Shared I/O node; bidirectional signal path between NO and NC; must remain within 0–V+ range |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed Break-Before-Make | Hardware-enforced tD ≥ 3ns prevents simultaneous conduction between NO and NC-essential for avoiding signal shorts in medical and test equipment |
| Low Charge Injection (5pC) | Reduces transient voltage spikes on high-Z nodes, enabling stable operation in integrator reset and sample-and-hold circuits |
| Matched rON (≤1Ω) | Ensures consistent gain and phase response across dual-path configurations in balanced audio or differential sensor routing |
| 2000V ESD Protection | Meets MIL-STD-883 Method 3015.7-supports handling in standard assembly lines without special ESD controls |
| 6-Lead SOT-23 Footprint | 0.95mm pitch, 2.9mm × 1.6mm body-enables placement in ultra-compact handheld devices like pagers and hearing aids |
Applications
| Ultrasound Signal Routing | Portable Audio Multiplexing |
|---|---|
Use Scenario: Selecting among multiple transducer elements in handheld ultrasound probes with real-time beamforming. IC Role / Device Role / Timing Role: SPDT switch routing analog echo signals from individual piezoelectric elements to a shared receive chain. Use Value: 76dB off-isolation prevents cross-channel interference; 28ns switching enables sub-microsecond element reconfiguration. | Use Scenario: Dynamically routing microphone or line-in signals to a single codec in Bluetooth headsets or voice assistants. IC Role / Device Role / Timing Role: Bidirectional analog switch selecting between two audio sources before ADC conversion. Use Value: 19Ω rON preserves SNR; 5pC charge injection avoids audible pop/click artifacts during source switching. |
| ECG Front-End Channel Selection | DAC Output Multiplexing |
Use Scenario: Switching between limb leads (RA/LA/LL) in wearable electrocardiograph monitors. IC Role / Device Role / Timing Role: Low-leakage SPDT switch isolating high-impedance biopotential electrodes from amplifier inputs. Use Value: ≤5nA leakage prevents DC offset drift; break-before-make eliminates lead shorting during acquisition mode changes. | Use Scenario: Selecting between two DAC outputs driving different analog subsystems (e.g., bias control vs. signal generation) in test instrumentation. IC Role / Device Role / Timing Role: Precision SPDT switch enabling fast, glitch-free output path selection without external logic. Use Value: Matched rON (≤1Ω) ensures identical gain scaling; 12V operation supports industrial ±10V output ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4677EUT+T | Higher rON (45Ω @ 5V), slower tON (65ns), no guaranteed break-before-make | Suitable for lower-speed, cost-sensitive consumer audio-not recommended for medical or high-fidelity routing | Select ISL5123IB-T when break-before-make timing, <30ns switching, or <20Ω rON is required |
| TMUX6219DSGR | Lower leakage (1pA), higher supply max (16.5V), but larger 10-pin VSSOP package and no SOT-23 option | Better for ultra-low-leakage industrial sensors; unsuitable for space-constrained portable PCBs | Choose ISL5123IB-T for SOT-23 footprint, guaranteed tD, and proven 2.7–12V compatibility in fielded designs |
Compared with MAX4677EUT+T and TMUX6219DSGR, the ISL5123IB-T uniquely combines 6-lead SOT-23 packaging, hardware-guaranteed break-before-make, and sub-30ns switching at 5V-making it the preferred choice for miniaturized, high-reliability 2:1 analog multiplexing where layout area and timing certainty are critical.
Availability
ISL5123IB-T is available at Aetrix Electronics and suitable for battery-powered handheld equipment, portable medical diagnostics, and high-speed test instrumentation requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for ISL5123IB-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 ICs, now part of Renesas Electronics.
The ISL5123IB-T belongs to Intersil's low-voltage analog switch product line, designed specifically for space- and power-constrained portable electronics requiring robust signal integrity and guaranteed switching behavior.
FAQ
What is the guaranteed break-before-make time for ISL5123IB-T?
The ISL5123IB-T guarantees a minimum break-before-make delay (tD) of 3ns across the full operating temperature range (–40°C to +85°C) and supply voltages (2.7V–12V). This parameter is hardware-enforced and specified in the Electrical Specifications section of the FN6022 datasheet under "Break-before-make Time Delay." It ensures no overlap between NO and NC conduction, protecting downstream circuitry from momentary shorts. The ISL5123IB-T achieves this via internal control logic that sequences the switch transitions-no external timing components are needed.
Does ISL5123IB-T support 3.3V logic-level control with a 5V analog supply?
Yes, ISL5123IB-T supports 3.3V logic-level control (VINH = 2.4V min, VINL = 0.8V max) while operating with a 5V analog supply (V+ = 4.5–5.5V). Its input stage is TTL/CMOS compatible across the full 2.7–12V supply range, and the internal level shifter translates 3.3V logic signals into full-rail gate drive for the analog switches. This allows direct interfacing with 3.3V microcontrollers or FPGAs without level-shifting circuitry-verified in the Digital Input Characteristics tables on pages 5 and 6 of FN6022.
What is the maximum analog signal voltage range supported by ISL5123IB-T?
The ISL5123IB-T supports an analog signal range from 0V to V+, where V+ is the positive supply voltage (2.7V to 12V). For example, with V+ = 5V, the valid analog input/output range is 0V to +5V; with V+ = 12V, it extends to 0V to +12V. Signals exceeding this range forward-bias internal ESD diodes and must be avoided. This rail-to-rail capability is explicitly stated in the "Analog Signal Range, VANALOG" specification on page 4 of FN6022 and confirmed in the Absolute Maximum Ratings table.
Can ISL5123IB-T be used in high-frequency RF applications above 100MHz?
The ISL5123IB-T exhibits usable frequency response beyond 100MHz-Figure 16 in FN6022 shows <0.5dB gain flatness up to ~300MHz in 50Ω systems at V+ = 5V and 12V. However, off-isolation degrades with frequency (e.g., ~50dB at 10MHz, falling ~20dB/decade), so it is not intended for RF front-end switching. Its primary high-frequency utility is in wideband analog signal routing (e.g., video, ultrasound, high-speed DAC outputs) where bandwidth >50MHz is needed but impedance matching and isolation requirements are less stringent than RF transceivers.
Is ISL5123IB-T pin-compatible with other members of the ISL512x family?
No, ISL5123IB-T is not pin-compatible with ISL5120/5121/5122 variants. While all share the 6-lead SOT-23 package, the ISL5123IB-T has a unique pinout: IN/V+/GND/NO/NC/COM. In contrast, ISL5120–5122 in SOT-23 use 8-lead packages (P8.064) with different pin assignments. The ISL5123IHZ-T is the only 6-lead variant-and ISL5123IB-T shares its marking and pinout. Confirmed via Pin Configurations on page 2 and Ordering Information on page 3 of FN6022.
ISL5123IB-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
ISL5123IB-T FAQ
1.How can I place an order for ISL5123IB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL5123IB-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 ISL5123IB-T reliable?
The price and inventory of ISL5123IB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL5123IB-T is usually 5 days.
3.What payment methods are accepted for ISL5123IB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL5123IB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL5123IB-T?
ISL5123IB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL5123IB-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 ISL5123IB-T?
For technical support, including ISL5123IB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL5123IB-T requirements.
6.How does Aetrix verify that ISL5123IB-T is sourced from the original manufacturer or authorized distributors?
All ISL5123IB-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 ISL5123IB-T meets industry standards.
7.What is the process for return or replacement of ISL5123IB-T?
All ISL5123IB-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL5123IB-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 ISL5123IB-T part is unused and in its original packaging.
Return procedure for ISL5123IB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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