Key facts
- Brand
- STMicroelectronics
- Model
- M48T18
- Industry
- Industrial
- Documents
- 6
- Languages
- EN
- Last added
- 2012-08-09
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ST M48T08 M48T08Y M48T18 5 V 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM handbook
The M48T08, M48T08Y, and M48T18 are 8 K x 8 non-volatile static RAMs and real-time clocks that are pin and function compatible with the DS1643. These devices integrate an ultra-low power SRAM, a real-time clock, and a power-fail control circuit with a battery backup. They offer BYTEWIDE RAM-like clock access with BCD-coded year, month, day, date, hours, minutes, and seconds.
Read onlineSTMicroelectronics M48T18 specifications
| Memory Capacity | 64 Kbit (8 Kb x 8) |
|---|---|
| Supply Voltage | 4.75 to 5.5 V |
| Clock Accuracy | ±1 minute a month |
| Operating Temperature | 0 to 70 °C |
| Package Types | PCDIP28, SOH28 |
Source: ST M48T08 M48T08Y M48T18 5 V 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM handbook
All STMicroelectronics M48T18 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
Is the M48T08 pin compatible with DS1643?
Yes, the M48T08/18/08Y is a non-volatile pin and function equivalent to any JEDEC standard 8 K x 8 SRAM and is pin and function compatible with the DS1643.
From: ST M48T08 M48T08Y M48T18 5 V 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM handbook
What is the typical clock accuracy?
The typical clock accuracy is ±1 minute a month at 25 °C.
From: ST M48T08 M48T08Y M48T18 5 V 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM handbook
Which TIMEKEEPER devices are best suited for new VME board designs?
The M48T59, M48T58, and M48T559 are the models best suited for new 'design-in' boards.
From: STMicroelectronics AN968 VMEbus Timekeeper Application Note
What is the unique package feature of these TIMEKEEPER devices?
They are available in ST's revolutionary SNAPHAT package, which is a standard SOIC fitted with a SNAPHAT top containing the battery and crystal.
From: STMicroelectronics AN968 VMEbus Timekeeper Application Note
What is the memory capacity of the M48T08/18/08Y?
The device provides an 8K x 8 non-volatile static RAM.
Does the device include a battery and crystal?
Yes, the CAPHAT™ package houses a quartz crystal and a long-life lithium button cell.