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Renesas ISL12022MIBZR5421
- Part No.:
- ISL12022MIBZR5421
- Manufacturer:
- Renesas
- Category:
- Real Time Clocks
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISL12022MIBZR5421.pdf
- Description:
- IC RTC CLK/CALENDAR I2C 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,899
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Product details
Overview
ISL12022MIBZR5421 from Renesas (formerly Intersil) is a low-power real-time clock IC with integrated 32.768kHz quartz crystal, ±5ppm temperature-compensated oscillator, 128-byte battery-backed SRAM, and automatic Daylight Saving Time adjustment. It operates from 2.7V to 5.5V across –40°C to +85°C and delivers <1.6µA battery current in backup mode - used in utility meters and POS terminals for tamper-resistant timekeeping.
For engineers reviewing the ISL12022MIBZR5421 datasheet, ISL12022MIBZR5421 pinout, ISL12022MIBZR5421 application, or ISL12022MIBZR5421 equivalent, key selection criteria include I²C interface compatibility, VBAT switchover timestamping, embedded crystal reliability, and ±2°C temperature sensor accuracy.
Technical Context
The ISL12022MIBZR5421 integrates a digitally compensated crystal oscillator using on-chip temperature sensing and dual-stage trimming (ALPHA/BETA + FATR/FDTR registers), achieving ±5ppm stability over –40°C to +85°C. Its RTC core maintains calendar accuracy through 2099 with leap-year correction and DST parameter storage.
Power management includes dual-supply monitoring (VDD/VBAT trip thresholds at 2.2V ±0.2V), brownout detection, intelligent switchover with time-stamped VDD↔VBAT transitions, and Battery Reseal™ to suppress leakage during shelf storage. The I²C interface supports 400kHz operation with open-drain SDA/SCL and IRQ/FOUT pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Accuracy | ±5ppm over –40°C to +85°C with integrated crystal and digital compensation - eliminates external TCXO or manual calibration. |
| Backup Current (IBAT) | 1.0–5.0µA at VBAT = 3V, TA = –40°C to +85°C - enables >10-year coin-cell battery life in metering applications. |
| SRAM Capacity | 128 bytes of nonvolatile user SRAM backed by VBAT - stores configuration, event logs, or calibration data without EEPROM wear-out. |
| Temperature Sensor | 10-bit output with ±2°C accuracy - enables on-the-fly oscillator drift correction and system thermal monitoring. |
| I²C Interface | Standard-mode (400kHz) compatible with open-drain SDA/SCL and IRQ/FOUT - interoperable with common microcontrollers without level-shifting. |
| Alarm & Output | One-time/periodic alarm + 15 selectable frequency outputs (including default 32.768kHz) - supports wake-up, synchronization, and timing reference distribution. |
| Supply Range | VDD = 2.7V to 5.5V; VBAT = 1.8V to 5.5V - accommodates Li-ion, supercapacitor, or 3V coin-cell backup sources. |
Pinout & Package
ISL12022MIBZR5421 is housed in a RoHS-compliant 20-lead SOIC package (M20.3 drawing) with internal crystal and optimized ESD performance. Pin 1 is bottom-left corner when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,2,3,6,8,15,18,19,20) | Ground reference | Multiple dedicated ground pins minimize noise coupling into RTC and crystal circuitry. |
| VDD (Pin 14) | Main power supply | Primary operating supply (2.7–5.5V); powers RTC, SRAM, and I²C interface during normal operation. |
| VBAT (Pin 7) | Backup supply input | Provides power to retain time, calendar, and SRAM when VDD fails; enables seamless switchover with timestamping. |
| SCL (Pin 12) | I²C clock input | Active-high synchronous clock for serial communication; always enabled except during VBAT-only operation. |
| SDA (Pin 11) | I²C bidirectional data | Open-drain bus line requiring external pull-up; supports read/write access to all registers and SRAM. |
| IRQ/FOUT (Pin 13) | Interrupt/frequency output | Dual-function pin: active-low interrupt on alarm or programmable clock output (15 options including 32.768kHz). |
| NC (Pins 4,5,9,10,16,17) | No connection | Internally unconnected; must remain floating - no routing or grounding permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded 32.768kHz crystal | Eliminates external crystal placement, layout sensitivity, and board-level tuning - reduces BOM count and improves long-term aging stability. |
| Auto Daylight Saving Time | User-programmable DST start/end rules stored in dedicated registers - enables fully autonomous seasonal time adjustment without host intervention. |
| Battery Reseal™ function | Reduces VBAT leakage current during storage by disabling internal bias networks - extends shelf life of battery-backed systems by >3×. |
| Time stamp on power switchover | Records exact time/date of VDD→VBAT and VBAT→VDD transitions in dedicated registers - critical for forensic logging in utility meters. |
| On-chip temperature compensation | Uses 10-bit sensor + digital trimming (ALPHA/BETA/FATR/FDTR) to correct oscillator drift - achieves ±5ppm without external components or firmware compensation. |
| Power fail & brownout monitors | Configurable VDD trip threshold (2.2V ±0.2V) with hysteresis - triggers alarm and initiates clean backup before system reset or data corruption. |
Applications
| Utility Meters | POS Equipment |
|---|---|
Use Scenario: Electricity/gas/water meter with remote reporting and tariff-based billing. IC Role / Device Role / Timing Role: Primary time source for energy consumption timestamping, secure log generation, and regulatory compliance reporting. Use Value: ±5ppm accuracy ensures billing integrity over 10+ years; battery-backed SRAM retains usage history during mains outage. |
Use Scenario: Retail point-of-sale terminal with transaction logging and receipt timestamping. IC Role / Device Role / Timing Role: Real-time clock for PCI-DSS-compliant audit trails and synchronized multi-terminal transactions. Use Value: Automatic DST adjustment prevents time-related transaction failures; IRQ/FOUT enables hardware-triggered receipt printing. |
| Printers and Copiers | Digital Cameras |
Use Scenario: Networked office printer with job accounting, firmware update scheduling, and error logging. IC Role / Device Role / Timing Role: System clock for job queuing, maintenance alerts, and secure firmware validation timestamps. Use Value: 128-byte SRAM stores service counters and calibration offsets; VBAT switchover preserves settings during power cycling. |
Use Scenario: Consumer digital camera with EXIF metadata, burst-mode timestamping, and auto-album organization. IC Role / Device Role / Timing Role: High-accuracy timekeeper for photo/video file naming, geotagging sync, and battery-life estimation. Use Value: ±2°C temperature sensor feeds into battery health algorithm; embedded crystal avoids camera startup delay from external crystal stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar real-time clock applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS3231SN#T&R | Higher accuracy (±2ppm), integrated TCXO, but no embedded crystal; requires external 32.768kHz crystal and load caps. | Preferred where ultimate stability is required and board space allows discrete crystal placement. | Choose DS3231SN#T&R if ±2ppm is mandatory and layout permits crystal tuning; ISL12022MIBZR5421 saves 3–4 passive components and reduces layout risk. |
| PCF2129AATS/1 | Lacks embedded crystal, no DST automation, smaller 64-byte SRAM, and no time-stamp registers for power switchover. | Suitable for cost-sensitive consumer devices where DST and forensic logging are not required. | Choose PCF2129AATS/1 only for basic RTC functions in non-regulated applications; ISL12022MIBZR5421 adds regulatory-grade features for industrial metering. |
Compared with DS3231SN#T&R and PCF2129AATS/1, the ISL12022MIBZR5421 uniquely combines embedded crystal, ±5ppm stability, automatic DST, and VDD/VBAT switchover timestamping in a single 20-pin SOIC - reducing design complexity while meeting utility-grade accuracy and logging requirements.
Availability
ISL12022MIBZR5421 is available at Aetrix Electronics and suitable for utility metering, POS equipment, and industrial printers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL12022MIBZR5421 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
Renesas Electronics acquired Intersil in 2017 and maintains full support for legacy Intersil timing products. Renesas is a global semiconductor leader focused on embedded processing, analog, power, and connectivity solutions.
The ISL12022MIBZR5421 belongs to Renesas' precision RTC product line, designed specifically for metering, industrial control, and infrastructure applications demanding high accuracy, battery longevity, and regulatory compliance.
FAQ
What is the oscillator accuracy specification for the ISL12022MIBZR5421 over temperature?
The ISL12022MIBZR5421 achieves ±5ppm oscillator stability over the full –40°C to +85°C operating range due to its integrated temperature sensor and digital compensation circuitry. This specification applies after reflow and includes initial accuracy, temperature drift, voltage variation, and aging effects - verified per FN7576 Rev 3.00 test conditions.
Does the ISL12022MIBZR5421 require an external crystal?
No, the ISL12022MIBZR5421 does not require an external crystal. It integrates a factory-calibrated 32.768kHz quartz crystal within the 20-lead SOIC package, eliminating external crystal placement, load capacitor selection, and board-level tuning - confirmed in the "Embedded 32.768kHz Quartz Crystal" feature and Figure 1 typical application circuit.
How does the Battery Reseal™ function extend shelf life in the ISL12022MIBZR5421?
The Battery Reseal™ function in the ISL12022MIBZR5421 reduces VBAT input leakage to <100nA by disabling internal bias networks during storage. This cuts standby current by up to 70% compared to standard RTCs, extending coin-cell shelf life beyond 10 years - documented in the DC Operating Characteristics table (IBATLKG = 100nA) and General Description section.
Can the ISL12022MIBZR5421 automatically adjust for Daylight Saving Time?
Yes, the ISL12022MIBZR5421 supports fully automatic Daylight Saving Time (DST) adjustment. Users program DST start/end dates and transition rules into dedicated DST Control Registers (DSTCR), after which the device autonomously updates the calendar - described in Functional Description section and validated in AN1549 application note.
What is the purpose of the time stamp registers in the ISL12022MIBZR5421?
The ISL12022MIBZR5421 includes dedicated Time Stamp VDD-to-Battery (TSV2B) and Battery-to-VDD (TSB2V) registers that record the exact time and date of each power switchover event. This enables forensic analysis of power failures in utility meters and ensures regulatory compliance for timestamped data logging - specified in Register Descriptions (pages 22–23) and General Description.
ISL12022MIBZR5421 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock/Calendar
- Features:
- Alarm, Daylight Savings, Leap Year, SRAM
- Memory Size:
- 128B
- Time Format:
- HH:MM:SS (12/24 hr)
- Date Format:
- YY-MM-DD-dd
- Interface:
- I2C, 2-Wire Serial
- Voltage - Supply:
- 2.7V ~ 5.5V
- Voltage - Supply, Battery:
- 1.8V ~ 5.5V
- Current - Timekeeping (Max):
- 14µA ~ 15µA @ 3V ~ 5V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-SOIC
ISL12022MIBZR5421 FAQ
1.How can I place an order for ISL12022MIBZR5421 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL12022MIBZR5421 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 ISL12022MIBZR5421 reliable?
The price and inventory of ISL12022MIBZR5421 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL12022MIBZR5421 is usually 5 days.
3.What payment methods are accepted for ISL12022MIBZR5421?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL12022MIBZR5421 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL12022MIBZR5421?
ISL12022MIBZR5421 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL12022MIBZR5421 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 ISL12022MIBZR5421?
For technical support, including ISL12022MIBZR5421 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL12022MIBZR5421 requirements.
6.How does Aetrix verify that ISL12022MIBZR5421 is sourced from the original manufacturer or authorized distributors?
All ISL12022MIBZR5421 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 ISL12022MIBZR5421 meets industry standards.
7.What is the process for return or replacement of ISL12022MIBZR5421?
All ISL12022MIBZR5421 units undergo pre-shipment inspection (PSI). If there is an issue with ISL12022MIBZR5421, 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 ISL12022MIBZR5421 part is unused and in its original packaging.
Return procedure for ISL12022MIBZR5421:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL12022MIBZR5421 Tags
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MCP7940N-I/SN
Microchip Technology
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MCP7940MT-I/MNY
Microchip Technology
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PCF85063ATL/1,118
NXP USA Inc.
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MCP7940NT-I/SN
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MCP7940NT-I/MS
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MCP7940N-I/MS
Microchip Technology
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PCF85063AT/AY
NXP USA Inc.
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PCF85063TP/1Z
NXP Semiconductors
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PCF85063ATT/AJ
NXP USA Inc.
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MCP7940NT-E/SN
Microchip Technology
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MCP7940NT-I/MNY
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MCP79400T-I/SN
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