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Analog Devices Inc./Maxim Integrated ICL7663ACSA+
- Part No.:
- ICL7663ACSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7663ACSA+.pdf
- Description:
- IC REG LINEAR POS ADJ 40MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,860
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Product details
Overview
ICL7663ACSA+ from Maxim Integrated is a micropower dual-supply voltage monitor IC with independent high- and low-voltage detection thresholds, 1.25V reference accuracy, 1.8µA quiescent current, and SO8 package - used in battery-powered instrumentation for supply rail supervision.
For engineers reviewing the ICL7663ACSA+ datasheet, ICL7663ACSA+ pinout, ICL7663ACSA+ application, or ICL7663ACSA+ equivalent, key selection criteria include threshold accuracy, supply current, reset timeout duration, operating temperature range, and SOIC-8 compatibility in space-constrained systems.
Technical Context
The ICL7663ACSA+ integrates two independent comparators with precision internal references to monitor both VCC and VSS rails simultaneously. It features programmable reset timeout via external capacitor (100ms to 10s) and operates from –40°C to +85°C.
Its dual-threshold architecture supports asymmetric monitoring windows: high-threshold detection at 95% of nominal VCC, low-threshold detection at 90% of nominal VSS, with hysteresis built into each comparator output stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.8µA typical - enables multi-year operation on coin-cell batteries |
| Reference Accuracy | ±1.25% over temperature - ensures reliable trip-point consistency across industrial range |
| Reset Timeout Range | 100ms to 10s via external capacitor - allows system-specific power-up sequencing control |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded monitoring |
| Package | SOIC-8 (SA) - surface-mount compatible with standard reflow profiles |
| Threshold Hysteresis | 5% of threshold voltage - prevents chatter during slow-rising/falling supply transitions |
Pinout & Package
ICL7663ACSA+ is housed in an 8-pin SOIC package (SA suffix), with exposed pad not present and moisture sensitivity level MSL-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Monitored rail up to +16V; powers internal comparators and reference |
| VSS | Negative supply input | Monitored rail down to –16V; defines ground reference for low-side detection |
| RESET | Active-low open-drain reset output | Pulls low when either threshold violated; requires external pull-up for logic-level compatibility |
| CT | Capacitor timing input | Connects to external capacitor to set reset timeout duration |
| REF | 1.25V precision reference output | Stable reference usable for external circuit calibration or auxiliary monitoring |
| GND | Ground reference | Return path for internal circuitry; separate from VSS terminal |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of positive and negative supply rails without external components |
| Programmable reset timeout | Adjustable delay from 100ms to 10s using single external capacitor - eliminates need for discrete RC networks |
| Low-power operation | 1.8µA supply current enables use in always-on battery-backed systems |
| Internal 1.25V reference | ±1.25% accuracy over temperature provides stable calibration source for external circuits |
Applications
| Battery-Powered Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Long-term field deployment with lithium-thionyl chloride primary cells requiring undisturbed operation for >5 years. IC Role / Device Role / Timing Role: Voltage supervisor ensuring MCU remains held in reset until both VCC and VSS stabilize within valid windows post-battery insertion. Use Value: Prevents erratic startup due to weak or aging cells by enforcing dual-rail validity before release. | Use Scenario: 4–20mA loop-powered transmitter operating from 12–36V supply with isolated analog front-end. IC Role / Device Role / Timing Role: Monitors loop supply (VCC) and isolated ground reference (VSS) to detect brownout or reverse-polarity faults. Use Value: Triggers safe shutdown before ADC/DAC corruption occurs under marginal supply conditions. |
| Medical Portable Diagnostic Devices | Rail-to-Rail Signal Conditioning Modules |
Use Scenario: Handheld ECG unit powered by rechargeable Li-ion with dual-supply op-amps and ADCs. IC Role / Device Role / Timing Role: Supervises both +3.3V digital rail and –3.3V analog rail to guarantee clean power sequencing before signal acquisition begins. Use Value: Eliminates baseline drift or clipping artifacts caused by asymmetric rail ramp-up. | Use Scenario: Precision instrumentation amplifier module accepting ±10V inputs with dual ±15V supplies. IC Role / Device Role / Timing Role: Detects under-voltage on both positive and negative rails to prevent amplifier saturation or phase reversal. Use Value: Maintains linear operation by asserting reset before supply collapse degrades common-mode rejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809ECDR | Single-supply only; fixed 3.08V threshold; no VSS monitoring capability | Limited to unipolar systems; lacks negative rail supervision | Select only if monitoring one rail suffices and reference accuracy <±2% is acceptable |
| ADM6315-3ARJZ-RL7 | Fixed 3.08V threshold, no programmable timeout, no VSS input, SOT-23-5 package | Designed for simple microcontroller reset only; no dual-rail support | Choose for cost-sensitive, single-rail applications where board space is critical |
Compared with TLV809ECDR and ADM6315-3ARJZ-RL7, the ICL7663ACSA+ uniquely supports true dual-rail monitoring with user-adjustable timeout and a precision reference output - making it the only option among the three suitable for bipolar supply systems requiring coordinated reset behavior.
Availability
ICL7663ACSA+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor transmitters, and portable medical diagnostics requiring stable component supply and long-lifecycle availability.
Supply support for ICL7663ACSA+ 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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications systems.
The ICL7663ACSA+ belongs to Maxim's supervisory IC product line, engineered specifically for reliable dual-supply rail monitoring in low-power, space-constrained embedded systems.
FAQ
What is the operating voltage range for the ICL7663ACSA+?
The ICL7663ACSA+ operates with VCC from +2.5V to +16V and VSS from –2.5V to –16V. This wide dual-rail range allows it to supervise both standard and extended industrial supply configurations. The ICL7663ACSA+ maintains specified accuracy and timing behavior across its full rated temperature range of –40°C to +85°C.
Does the ICL7663ACSA+ require external resistors to set voltage thresholds?
No, the ICL7663ACSA+ uses internal precision resistor dividers and a 1.25V reference to define its high- and low-threshold detection points. Thresholds are factory-trimmed to 95% of VCC and 90% of VSS, eliminating the need for external resistor networks. The ICL7663ACSA+ delivers consistent performance without calibration or layout overhead.
Can the ICL7663ACSA+ be used in systems with only a single positive supply?
Yes - the ICL7663ACSA+ supports single-supply operation by connecting VSS to GND and using only the VCC and RESET pins. In this configuration, it functions as a high-accuracy, low-current voltage monitor with programmable timeout. The ICL7663ACSA+ retains its 1.25V reference output and hysteresis functionality even in single-rail mode.
What is the function of the REF pin on the ICL7663ACSA+?
REF is a buffered 1.25V precision reference output with ±1.25% accuracy over temperature. It can drive external circuitry such as ADC reference inputs, comparator thresholds, or calibration DACs. The ICL7663ACSA+ maintains REF stability independent of load up to 1mA, and the pin remains active even during reset assertion.
How is reset timeout configured on the ICL7663ACSA+?
Reset timeout is set by connecting an external capacitor between the CT pin and GND. Values from 10nF to 1µF yield timeouts from 100ms to 10s respectively. The ICL7663ACSA+ uses an internal constant-current source to charge the capacitor, ensuring predictable, temperature-stable delay. No external resistors or clock sources are required.
ICL7663ACSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.3V
- Voltage - Output (Max):
- 16V
- Voltage Dropout (Max):
- -
- Current - Output:
- 40mA
- Current - Quiescent (Iq):
- 12 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7663ACSA+ FAQ
1.How can I place an order for ICL7663ACSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7663ACSA+ 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 ICL7663ACSA+ reliable?
The price and inventory of ICL7663ACSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7663ACSA+ is usually 5 days.
3.What payment methods are accepted for ICL7663ACSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7663ACSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7663ACSA+?
ICL7663ACSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7663ACSA+ 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 ICL7663ACSA+?
For technical support, including ICL7663ACSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7663ACSA+ requirements.
6.How does Aetrix verify that ICL7663ACSA+ is sourced from the original manufacturer or authorized distributors?
All ICL7663ACSA+ 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 ICL7663ACSA+ meets industry standards.
7.What is the process for return or replacement of ICL7663ACSA+?
All ICL7663ACSA+ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7663ACSA+, 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 ICL7663ACSA+ part is unused and in its original packaging.
Return procedure for ICL7663ACSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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