M41T65Q6F vs M41T94MQ6F Comparison
Detailed side-by-side comparison of M41T65Q6F by STMicroelectronics and M41T94MQ6F by STMicroelectronics. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
STMicroelectronics
M41T65Q6F - Serial RTC with Alarm, I2C, 1.3V-3.6V | STMicroelectronics
M41T65Q6F ✓ ActiveSTMicroelectronics
M41T94MQ6F - Serial RTC 44B NVRAM SPI 16-SOIC | STMicroelectronics
M41T94MQ6F ✓ ActiveSpecification Comparison
| Parameter | M41T65Q6F | M41T94MQ6F |
|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics |
| Category | Clock & Timing | Clock & Timing |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $1.83 | $4.11 |
| Function | Real-Time Clock (RTC) with Alarm | Serial Real-Time Clock with NVRAM and Reset |
| Clock/Calendar Format | HH:MM:SS / Day-Date-Month-Year-Century (BCD) | — |
| Interface | I2C (2-Wire Serial), up to 400 kHz | SPI (4-wire, serial peripheral interface) |
| Supply Voltage (VCC) | 1.3 V to 3.6 V | — |
| Timekeeping Current | Typical <1 µA (battery backup mode) | — |
| Crystal Frequency | 32.768 kHz (external) | — |
| Crystal Load Capacitance | 12.5 pF (typical, per datasheet) | — |
| Alarm / Interrupt | Yes (programmable) | — |
| Square-Wave Output | Programmable (32.768 kHz / 1 Hz) | — |
| Backup Battery Switchover | Automatic with integrated trickle charger | — |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C (industrial) |
| Package | 16-VFQFN Exposed Pad (QFN-16 EP) | 16-pin SOIC (0.154", 3.90 mm width) |
| Mounting Type | Surface Mount | Surface Mount |
| Leap-Year Compensation | Automatic through year 2100 | — |
| RoHS Status | Compliant | Compliant |
| Memory Size | — | 44 bytes NVRAM (64 x 8, 512 bits) |
| Time Format | — | Day/Date/Month/Year/Century, BCD |
| Counter Granularity | — | Tenths/Hundredths of seconds, Seconds, Minutes, Hours, Day, Date, Month, Year, Century |
| SPI Clock Frequency | — | 2 MHz maximum |
| Operating Supply Voltage | — | 2.7 V to 5.5 V |
| Supply Current | — | [DATA_NEEDED: operating Iq typ/max] |
| Crystal Oscillator | — | 32,768 Hz with on-chip load capacitance 12.5 pF |
| Crystal Series Resistance | — | Up to 80 kΩ (high ESR supported) |
| Reset Output | — | Yes, open-drain active-low RESET pulse |
| NVRAM Endurance | — | Battery-backed SRAM |
| MSL Level | — | 1 (unlimited at <30 °C/85 % RH) |
| Lead-Free / Halogen-Free | — | Yes / Yes (by ST declaration) |