Key facts
- Brand
- STMicroelectronics
- Model
- M41ST85W
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-09
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ST M41ST85W 3.0/3.3 V I 2 C combination serial RTC NVRAM supervisor microprocessor supervisor handbook
M41ST85W is a 3.0/3.3 V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor. It features automatic battery switchover and WRITE protection for internal serial RTC and external low power SRAM (LPSRAM). It also features 400 kHz I2C serial interface, 3.0/3.3 V operating voltage VCC=2.7 to 3.6 V, ultralow battery supply current of 500 nA (max), RoHS compliant, lead-free second level interconnect and so on.
Read onlineSTMicroelectronics M41ST85W specifications
| Operating voltage | 5.0 V or 3.0 V |
|---|---|
| Oscillator operating voltage | 2.5 V to 5.5 V |
| Battery supply current (low‑power mode) | 500 nA max |
| Memory size | 512 bit (64 × 8) |
| General‑purpose RAM | 44 bytes |
| Power‑fail deselect voltage (M41ST85Y) | Voc = 4.5‑5.5 V; Vprp = 4.20‑4.50 V |
| Power‑fail deselect voltage (M41ST85W) | Vcc = 2.7‑3.6 V; Vprp = 2.55‑2.70 V |
Source: STMicroelectronics M41ST85Y/M41ST85W Serial RTC NVRAM Supervisor Handbook
All STMicroelectronics M41ST85W documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the operating voltage range for the M41ST85Y?
The M41ST85Y operates from 4.5 V to 5.5 V (Voc) with a power‑fail reference voltage between 4.20 V and 4.50 V.
From: STMicroelectronics M41ST85Y/M41ST85W Serial RTC NVRAM Supervisor Handbook
How much battery current does the device draw in low‑power mode?
The device draws a maximum of 500 nA in ultra‑low battery supply current mode.
From: STMicroelectronics M41ST85Y/M41ST85W Serial RTC NVRAM Supervisor Handbook