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Renesas ICL7665SCBAZ-T
- Part No.:
- ICL7665SCBAZ-T
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7665SCBAZ-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,839
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Product details
Overview
ICL7665SCBAZ-T from Intersil is a dual CMOS micropower over/under voltage detector in an 8-lead SOIC package, featuring two independently programmable comparators with 1.3V internal bandgap reference, 3µA typical supply current, ±5mV trip voltage difference between channels, and open-drain N-channel OUT1/OUT2 plus open-drain P-channel HYST1/HYST2 outputs - used for battery low-voltage warning and power-rail fault monitoring in portable instrumentation.
For engineers reviewing the ICL7665SCBAZ-T datasheet, ICL7665SCBAZ-T pinout, ICL7665SCBAZ-T application, or ICL7665SCBAZ-T equivalent, this page delivers verified specifications including guaranteed 10µA max quiescent current over temperature, 1.8–16V operating supply range, 2% threshold accuracy (ICL7665SA variant), 100ppm/°C temperature coefficient, and SOIC-8 Pb-free RoHS-compliant packaging.
Technical Context
The ICL7665SCBAZ-T integrates two independent voltage comparators sharing a precision 1.3V bandgap reference; each SET input drives its own comparator to generate logic-level outputs via open-drain MOS transistors. Trip points are externally set using resistor dividers on SET1/SET2, while hysteresis is implemented by feeding back HYST1/HYST2 outputs to adjust effective divider ratios.
Its architecture supports both overvoltage (OUT2 active-low when VIN exceeds VTR2) and undervoltage (OUT1 active-low when VIN falls below VTR1) detection simultaneously. Output saturation voltages are specified down to 0.06V at 2mA sink (V+ = 15V) and –0.02V at –0.5mA source (V+ = 15V), enabling direct interface with TTL/CMOS logic and discrete FET gate drivers without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 16V - supports single-cell Li-ion (3.0–4.2V), 5V systems, and 12V industrial rails without external regulation. |
| Quiescent Current | ≤10µA max over full 0°C to +70°C range - enables multi-year operation on coin-cell batteries in maintenance-free sensors. |
| Reference Voltage | 1.30V nominal ±2.5% (ICL7665SCBAZ-T) - stable internal bandgap reference eliminates need for external precision voltage source. |
| Output Type | Open-drain N-channel (OUT1/OUT2) + open-drain P-channel (HYST1/HYST2) - allows flexible wired-OR logic, rail-to-rail sinking/sourcing, and bidirectional hysteresis control. |
| Input Leakage Current | ≤10nA at SET pins - permits use of high-value resistor dividers (>10MΩ) without significant trip-point error. |
| Delay Time | 55–90µs propagation delay - sufficient for DC supply monitoring but not suitable for high-frequency PWM or fast transient detection. |
| Temperature Coefficient | 200ppm/°C (ICL7665S grade) - ensures <±15mV drift across 0°C to +70°C ambient, critical for battery end-of-discharge thresholds. |
Pinout & Package
ICL7665SCBAZ-T is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, pkg drawing M8.15), RoHS-compliant with 100% matte tin termination, compatible with SnPb and Pb-free reflow soldering per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT1 | Undervoltage detector output | Open-drain N-channel switch - pulls low when SET1 voltage falls below 1.3V; requires external pull-up for logic HIGH. |
| 2 HYST1 | Hysteresis control for channel 1 | Open-drain P-channel switch - shorts external hysteresis resistor when OUT1 is active, lowering effective trip point on falling input. |
| 3 SET1 | Undervoltage sense input | High-impedance comparator input - connected to resistor divider from monitored rail; sets VTR1 = 1.3V × (R11 + R21)/R11. |
| 4 GND | Analog ground reference | Primary return path for internal bandgap, comparators, and output stages; must be low-impedance connection to system ground plane. |
| 5 V+ | Positive supply input | Power rail for internal circuitry (1.8–16V); also serves as reference for HYSTx sourcing capability and OUTx pull-down headroom. |
| 6 OUT2 | Overvoltage detector output | Open-drain N-channel switch - pulls low when SET2 voltage exceeds 1.3V; used for "power OK" or overvoltage alarm signaling. |
| 7 SET2 | Overvoltage sense input | High-impedance comparator input - connected to separate resistor divider; sets VTR2 = 1.3V × (R12 + R22)/R12. |
| 8 HYST2 | Hysteresis control for channel 2 | Open-drain P-channel switch - shorts external hysteresis resistor when OUT2 is active, raising effective trip point on rising input. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent detectors | Enables simultaneous monitoring of under- and overvoltage conditions on same or different rails using one IC - reduces BOM count and PCB area vs. discrete solutions. |
| Individually programmable hysteresis | Each channel's HYSTx pin controls separate resistor networks, allowing asymmetric hysteresis widths (e.g., 100mV UV hysteresis, 50mV OV hysteresis) to prevent chatter near trip points. |
| 100% tested at 2V supply | Guarantees functionality at minimum operating voltage - essential for brownout detection in low-VDD microcontroller systems where supply may dip to 2.0–2.2V during wake-up. |
| 20mA output sink capability | Drives LEDs, small relays, or MOSFET gates directly without buffer stages - simplifies power-fail indicator circuits and battery disconnect logic. |
| Pb-free RoHS compliance | Meets global environmental regulations with 100% matte tin lead finish and JEDEC-qualified reflow profile - supports automated assembly in modern SMT lines. |
Applications
| Battery Low-Voltage Warning | Single-Supply Power OK Monitor |
|---|---|
|
Use Scenario: Portable medical device powered by 3.7V Li-ion battery requires early warning at 3.2V and hard shutdown at 3.0V to prevent cell damage. IC Role / Device Role / Timing Role: ICL7665SCBAZ-T acts as dual-threshold supervisor: SET2 monitors for 3.2V warning (OUT2 toggles), SET1 triggers 3.0V cutoff (OUT1 disables charging FET). Use Value: Eliminates need for separate UVLO IC and comparator; hysteresis prevents flicker during battery recovery pulses; 3µA quiescent current extends shelf life. |
Use Scenario: Industrial PLC controller uses +5V rail derived from switching supply; system must assert RESET if rail drops below 4.75V or rises above 5.25V. IC Role / Device Role / Timing Role: ICL7665SCBAZ-T configures OUT1 as undervoltage flag (VTR1 = 4.75V) and OUT2 as overvoltage flag (VTR2 = 5.25V), wired-OR'd to common POWER_OK line. Use Value: Detects both fault directions with one component; open-drain outputs allow seamless integration with existing reset generator ICs; 100ppm/°C TC ensures stability across operating temperature range. |
| AC Brownout Detection | Memory Backup Power Supervision |
|
Use Scenario: Smart meter with AC mains input must detect brownouts (<180VAC) and initiate graceful shutdown before EEPROM write corruption occurs. IC Role / Device Role / Timing Role: ICL7665SCBAZ-T monitors rectified/filtered AC secondary voltage via SET1; OUT1 triggers brownout interrupt, while HYST1 adds 5V hysteresis to reject line noise. Use Value: Replaces optocoupler-based detection with higher accuracy and lower component count; 55µs response time captures sub-cycle sags; operates down to 1.8V supply during backup battery mode. |
Use Scenario: Embedded data logger retains real-time clock and SRAM during main power loss using supercapacitor backup; must disable writes when backup voltage falls below 2.5V. IC Role / Device Role / Timing Role: ICL7665SCBAZ-T SET1 senses supercap voltage; OUT1 asserts WRITE_PROTECT when VBACKUP < 2.5V; HYST1 prevents false triggers during capacitor discharge ripple. Use Value: Prevents data corruption without external voltage monitor IC; 10nA SET pin leakage avoids loading backup capacitor; SOIC-8 footprint fits tight space constraints near RTC IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV7032IDR | Single-supply, rail-to-rail input comparator (no internal reference); requires external 1.24V shunt reference; 650nA IQ; no HYST pins. | Lacks integrated reference and hysteresis control - needs ≥3 external components to replicate ICL7665SCBAZ-T's dual-threshold function. | Select only if ultra-low IQ (<1µA) is mandatory and board space allows added discretes; not drop-in. |
| MAX6326UT29D3+ | Dedicated single-channel 2.93V reset IC; fixed threshold; 1.6µA IQ; push-pull output; no programmability or hysteresis adjustment. | Provides only undervoltage reset - cannot implement overvoltage detection or adjustable trip points required in dual-fault monitoring. | Use only for simple power-on reset where fixed 2.93V threshold suffices; no functional equivalence to dual-programmable architecture. |
Compared with TLV7032IDR and MAX6326UT29D3+, the ICL7665SCBAZ-T uniquely delivers dual independently programmable thresholds with integrated reference and dedicated hysteresis control pins in a single SOIC-8 package - reducing design complexity and validation effort for battery-powered and multi-rail systems.
Availability
ICL7665SCBAZ-T is available at Aetrix Electronics and suitable for battery-operated systems, portable instrumentation, and memory backup power supervision requiring stable component supply with long-term manufacturability and RoHS compliance.
Supply support for ICL7665SCBAZ-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 leader in precision analog and power management ICs, delivering high-reliability solutions for industrial, infrastructure, and mobile computing markets.
The ICL7665SCBAZ-T belongs to Intersil's micropower supervisor product line, designed specifically for ultra-low-power voltage monitoring in battery-critical applications such as portable medical devices, wearables, and remote sensors.
FAQ
What is the maximum supply voltage rating for the ICL7665SCBAZ-T?
The ICL7665SCBAZ-T has an absolute maximum supply voltage of +18V, but its specified operating range is 1.8V to 16V across the commercial temperature range (0°C to +70°C). Operation above 16V risks violating electrical specifications and may cause latchup due to SCR structure inherent in the CMOS process - always limit V+ to ≤16V in normal use.
Can the ICL7665SCBAZ-T monitor both overvoltage and undervoltage on the same power rail?
Yes, the ICL7665SCBAZ-T can monitor both conditions on a single rail using external resistor dividers on SET1 and SET2. For example, configuring SET1 for 4.5V undervoltage and SET2 for 5.5V overvoltage on a +5V rail enables full fault coverage. The device's dual independent comparators and separate HYSTx outputs allow precise, non-interacting hysteresis for each threshold.
Does the ICL7665SCBAZ-T require external components to operate?
Yes - the ICL7665SCBAZ-T requires external resistor dividers on SET1 and SET2 to scale the monitored voltage to the 1.3V internal reference, plus pull-up resistors on OUT1/OUT2 for logic-level output. HYST1/HYST2 connections are optional but recommended to prevent output chatter near trip points; no external reference or timing components are needed.
What is the purpose of the HYST1 and HYST2 pins on the ICL7665SCBAZ-T?
The HYST1 and HYST2 pins are open-drain P-channel outputs that enable programmable hysteresis by shorting external resistors in the SET1/SET2 divider networks. When OUT1 activates, HYST1 turns ON and lowers the effective trip point for falling input voltage - creating asymmetry that prevents oscillation during slow-moving or noisy supply transitions.
Is the ICL7665SCBAZ-T pin-compatible with earlier ICL7665 variants?
Yes - the ICL7665SCBAZ-T shares identical pinout and footprint with all ICL7665S family members in SOIC-8 (M8.15) and PDIP-8 (E8.3) packages. It replaces ICL7665B and ICL7665C variants with improved specs including wider voltage range, tighter threshold accuracy in SA grade, and guaranteed max supply current, while maintaining full electrical and mechanical compatibility.
ICL7665SCBAZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7665SCBAZ-T FAQ
1.How can I place an order for ICL7665SCBAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7665SCBAZ-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 ICL7665SCBAZ-T reliable?
The price and inventory of ICL7665SCBAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7665SCBAZ-T is usually 5 days.
3.What payment methods are accepted for ICL7665SCBAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7665SCBAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7665SCBAZ-T?
ICL7665SCBAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7665SCBAZ-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 ICL7665SCBAZ-T?
For technical support, including ICL7665SCBAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7665SCBAZ-T requirements.
6.How does Aetrix verify that ICL7665SCBAZ-T is sourced from the original manufacturer or authorized distributors?
All ICL7665SCBAZ-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 ICL7665SCBAZ-T meets industry standards.
7.What is the process for return or replacement of ICL7665SCBAZ-T?
All ICL7665SCBAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7665SCBAZ-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 ICL7665SCBAZ-T part is unused and in its original packaging.
Return procedure for ICL7665SCBAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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