The YSN1302 is a trickle-charge timekeeping circuit with a real-time clock/calendar and 31 bytes of static RAM, reached through a simple serial interface. It provides year, month, date, hour, minute, and second, adjusts the end-of-month date for months shorter than 31 days, corrects for leap years, and runs in 12-hour or 24-hour format. Beyond timekeeping it offers a dual-pin primary and backup supply and a programmable trickle charger on Vcc1.
(PS: Brief datasheet only. Contact us for full specifications. )
| Parameter | Specification |
| Package | SOP-8 |
| Supply Voltage | 2.0~5.5 V |
| Temperature Stability | Depends on External Crystal |
| Built-in Crystal | No |
| Interface | 3-Wire Serial |
| Operating Temperature | -40°C to +85°C |
♦ Real-time clock counts year, month, day, hour, minute, second, and weekday up to 2100, with leap-year correction
♦ 31 × 8-bit general-purpose scratchpad RAM
♦ Serial input and output keeps the pin count to a minimum
♦ 2.0 V to 5.5 V wide operating voltage range
♦ Operating current below 300nA at 2.0V
♦ Single-byte or multi-byte (burst mode) transfer when reading or writing the clock or RAM
♦ 8-pin DIP or optional 8-pin surface-mount SOP package
♦ Simple 3-wire interface
♦ TTL compatible (Vcc = 5V)
♦ Operating temperature range: -40°C to +85°C
Voltage : 2.0~5.5V
Frequency : /
Dimension : SOP-8
Operating Temp :
Frequency Tolerance : Depends on the external crystal
Output :
Package :
Output Freq :
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Output Qty :
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Jitter :
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