DS1337S+T&R

DS1337S+T&R is a serial real-time clock from Analog Devices with an I2C interface, supplied in an 8-pin SOIC package with a 150 mil body on tape and reel. It operates from 1.8 to 5.5V, so the same clock can sit on low-voltage logic rails or legacy 5V systems, and two alarms let the host wake or flag events at set times without keeping the main processor running. For product teams, a standalone RTC keeps timekeeping, scheduling and event logging alive through sleep states and power interruptions when paired with a backup supply, which improves the behaviour of meters, data loggers and point-of-sale equipment. Analog Devices lists the DS1337 family as in production, and Farnell and Newark list this exact tape-and-reel code. Selection and sourcing advice: choose the +T&R code when you need reel-fed assembly, and check the packing carefully if your line is set up for tubes, because the suffix is the only difference on the order; confirm your I2C bus voltage sits inside the 1.8 to 5.5V window, and select the external crystal and backup arrangement from the DS1337 datasheet rather than copying a circuit from a different RTC family. Parameters verified against Analog Devices documentation.