RTC-8564JE
- Brand： EPSON
- Size/Package： 7.3 x 6.0 x 1.5 mm
- Parameter： ±5ppm
- Supply Voltage： 1.8-5.5V
- Interface： I2C
- Freq： 32.768KHz
- Operating Temp： -40~+85℃
- Package： VSOJ-20
- Parameters
- Brand： EPSON
- Size/Package： 7.3 x 6.0 x 1.5 mm
- Parameter： ±5ppm
- Supply Voltage： 1.8-5.5V
- Interface： I2C
- Freq： 32.768KHz
- Operating Temp： -40~+85℃
- Package： VSOJ-20
RTC-8564JE | 275 nA I²C RTC with Built-in Crystal — Drop-In Support for Legacy Designs
Product Introduction
The EPSON RTC-8564JE is an ultra-low-power I²C real-time clock with a built-in, frequency-adjusted 32.768 kHz crystal. It consumes only 275 nA (typ.) at 3.0 V and keeps time down to 1.0 V, making it suitable for coin-cell-backed metering, industrial HMI, security and portable equipment. The VSOJ-20 footprint supports drop-in replacement for legacy designs facing supply or EOL issues; YQM holds stock for fast samples and production.
Application Pain Points & Solutions
- Pain: Original supplier EOL or long lead time
Solution: YQM stock supports continuity without board changes. - Pain: PCB redesign and re-certification
Solution: Same VSOJ-20 footprint and pinout for drop-in replacement. - Pain: External crystal and load-capacitor tuning
Solution: Built-in trimmed crystal removes one BOM item and matching work. - Pain: Coin-cell drain and time loss
Solution: 275 nA backup current and 1.0 V keep-alive extend battery life. - Pain: Limited MCU I/O
Solution: 2-wire I²C plus optional CLKOUT. - Pain: Need periodic wake-up or alarm
Solution: Built-in alarm, timer and interrupt.
Core Advantages
- Ultra-low power: 275 nA typ. at 3.0 V; 1.0 V timekeeping.
- Built-in crystal: Factory-adjusted 32.768 kHz; no external crystal or load capacitors.
- Wide supply: 1.8–5.5 V, compatible with 3.3 V and 5 V systems.
- Drop-in footprint: VSOJ-20 7.3×6.0×1.5 mm for legacy boards.
- I²C interface: 400 kHz; 2-wire plus optional CLKOUT.
- Stock support: YQM stock for samples and volume production.
Key Specifications
| Parameter | Value |
|---|---|
| Frequency | 32.768 kHz |
| Accuracy | ±5 ppm |
| Supply Voltage | 1.8–5.5 V |
| Timekeeping Voltage | 1.0–5.5 V |
| Backup Current | 275 nA typ. @3.0 V |
| Interface | I²C 400 kHz |
| Package | VSOJ-20 7.3×6.0×1.5 mm |
| Operating Temp. | -40~+85°C |
| Functions | Calendar, alarm, timer, CLKOUT, VDD detect |
Applications
Coin-cell-backed timekeeping for meters and loggers.
Reliable timekeeping in always-on control equipment.
Time stamps for access control and alarms.
Low backup current for battery-powered products.
Drop-in replacement for VSOJ-20 RTC designs.
Accurate time stamps for long-term records.
FAQ
Q: Is RTC-8564JE a drop-in replacement?
A: It uses the VSOJ-20 footprint; confirm pinout and firmware before production.
Q: What is the backup current?
A: 275 nA typ. at 3.0 V, with timekeeping down to 1.0 V.
Q: Does it need an external crystal?
A: No. The 32.768 kHz crystal is built in and factory-adjusted.
Q: Are samples available?
A: Yes. YQM holds stock and provides samples and FAE support.
Related Products
Contact YQM ELECTRONICS for stock, samples and engineering support for legacy RTC designs.
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