Overview
Description
The 1339 serial real-time clock (RTC) is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I2C bus. The clock/date provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The 1339 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply, maintaining time, date, and alarm operation.
Features
- Real-Time Clock (RTC) counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100
- Packaged in 8-pin MSOP, 8-pin SOIC, or 16-pin SOIC (surface-mount package with an integrated crystal)
- Fast mode I2C Serial interface
- Two time-of-day alarms
- Programmable square-wave output
- Oscillator stop flag
- Automatic power-fail detect and switch circuitry
- Trickle-charge capability
- Industrial temperature range (-40 to +85°C)
- Underwriters Laboratory (UL) recognized
Comparison
Applications
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Support Communities
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Debugging M16C/5LD - E8a stops when starting PLL
Hi all.I'm trying to run the E8a, emulating the M16C/5LD.I'm using IAR workbench and C-SPY and it's working great in all other aspects.When starting the PLL, (setting PLC0, bit 7) it all hangs.I'm using a 16MHz crystal, multiplying by ...
Apr 23, 2011 -
e2 studio install
I am trying to install 2022-10 in Linux and I get the following error: *** stack smashing detected ***: terminatedAborted (core dumped) 2022-07 crashes on any attempt to debug complaining that it doesn't have libncurses.so.6, but the only information I can find refers to libncurses5 which doesn ...
Jan 23, 2023 -
SH4: what happens when I run into 0xFFFF....?
I have a situation where depending on the hardware I am running my working code may be prefixed by 0x30000 bytes of 0xFF.A bootloader causes the jump to 0x04030000, but my code is actually at 0x04060000. The space in between is reliably filled with 0xFF.The program still seems ...
Jun 4, 2012