CM8V-T1A 32.768kHz Tuning-Fork SMD Crystal
The CM8V-T1A is a 32.768kHz tuning-fork SMD quartz crystal from Micro Crystal in a tiny 2.0×1.2×0.6mm package. With a ±20ppm frequency tolerance (±10ppm option), a 70kΩ max ESR, and multiple load-capacitance options (CL 4.0/7.0/9.0/12.5pF) to match the host oscillator, over −40~+85°C, it serves as the clock source for an RTC/MCU low-speed external oscillator (LSE) — for wearables, IoT, and metering. Note: this is a bare crystal, a different category from our RV-xxxx RTC modules (which embed their own crystal).
Crystal32.768kHzTuning Fork
RV-8803-C7 High-Accuracy I²C RTC Module
The RV-8803-C7 is a high-accuracy I²C real-time-clock module from Micro Crystal with a built-in 32.768kHz DTCXO, ±3ppm accuracy (−40~85°C), ~240nA timekeeping at 3V, a wide 1.5~5.5V supply, plus alarm, timer, interrupt output, and a time-stamp event input.
RTCI²CDTCXO
RV-1805-C3 Extreme-Low-Power I²C RTC Module
The RV-1805-C3 is an extreme-low-power RTC module from Micro Crystal with an integrated 32.768kHz crystal, drawing as little as ~60nA (typ) in time-keeping, with an I²C (400kHz) interface, alarm, countdown timer, periodic interrupt and watchdog, plus an on-chip trickle charger and automatic backup-supply switchover — for battery/coin-cell metering, data loggers, and IoT sensor nodes. Note: the manufacturer marks this part NRND (not recommended for new designs); for new designs consider the in-stock RV-3028-C7.
RTCUltra-Low-PowerI²C
RV-3028-C7 Extreme Low Power I²C RTC Module
The RV-3028-C7 is one of the industry's most power-efficient RTC modules, drawing typically just ~45 nA. It integrates a tuned crystal, offers an I²C interface, and includes alarm, timer, and event logging — ideal for coin-cell powered wearables, meters, and IoT applications needing long battery life.
RTCReal-Time ClockUltra-Low Power
RV-3029-C2 Temp-Compensated I²C RTC (with Backup Charge)
The RV-3029-C2 is a Micro Crystal I²C RTC module with an embedded 32.768kHz crystal and DTCXO temperature compensation (±6ppm, −40~85°C), with backup-battery switchover, programmable trickle charge, a temperature sensor, 8-byte RAM, and 2-byte EEPROM, ~800nA timekeeping, a 1.3~5.5V supply, and AEC-Q200. Note: this part is discontinued (NRND); use the RV-3028-C7 for new designs.
RTCI²CDTCXO
RV-3129-C3 High-Accuracy Temp-Compensated I²C RTC
The RV-3129-C3 is a high-accuracy I²C RTC module from Micro Crystal with an integrated 32.768kHz crystal and DTCXO temperature compensation (on-chip thermometer), ±6ppm accuracy (option A, −40~85°C). I²C Fast-mode 400kHz, ~100nA timekeeping, a wide ~1.3~5.5V supply, plus alarm, timer, programmable CLKOUT, and low-voltage detection. 4-pin ceramic SMD (5.0×3.2mm).
RTCI²CDTCXO
RV-8564 I²C RTC Module (PCF8563-Compatible)
The RV-8564 is an I²C RTC/calendar module from Micro Crystal with an embedded 32.768kHz crystal, register-compatible with the NXP PCF8563 so existing firmware can be reused. I²C Fast-mode 400kHz, ~250nA timekeeping, a wide 1.2~5.5V supply, plus alarm, timer, programmable CLKOUT, interrupt, and voltage-low detection. SON ceramic package.
RTCI²CPCF8563 Compatible
RV-3032-C7 High-Accuracy Temp-Compensated I²C RTC
The RV-3032-C7 is a high-accuracy I²C RTC module from Micro Crystal with a built-in 32.768kHz DTCXO, ±2.5ppm accuracy (−40~85°C), and a readable 12-bit temperature sensor. With ~160nA timekeeping, a wide 1.2~5.5V supply, plus user EEPROM/RAM, alarm, and timer, in a SON-8 package.
RTCI²CDTCXO
RV-8263-C8 Ultra-Small I²C RTC Module
The RV-8263-C8 is an ultra-small I²C real-time-clock module from Micro Crystal with an integrated 32.768kHz crystal, ~190nA timekeeping, a wide 0.9~5.5V supply, and alarm, timer, interrupt, and CLKOUT. In a 2.0×1.2×0.7mm ceramic SMD package, it is the miniaturized successor to the RV-8263-C7 (same function, roughly half the footprint).
RTCI²CLow Power
RV-8263-C7 I²C RTC Module
The RV-8263-C7 is a low-power I²C RTC module with an integrated 32.768 kHz crystal, offering alarm, countdown timer, and clock output (CLKOUT). Its compact package suits consumer electronics, appliances, and industrial timekeeping.
RTCReal-Time ClockI²C
