DS1318E+T&R

Overview

The DS1318E+T&R is a parallel-interface elapsed time counter (ETC) housed in a 24-pin TSSOP package. It features a 44-bit binary counter with a 4.096kHz internal clock, providing 244µs resolution and a maximum count exceeding 136 years. The device operates on a +3.3V supply (3.0V to 3.6V) within the industrial temperature range of -40°C to +85°C. It includes automatic power-fail detection, switching between primary and backup supplies, and write protection for internal registers.

Feature Summary

• 44-bit binary counter with 244µs resolution
• Byte-wide parallel interface for register access
• Automatic power-fail detection and battery switchover
• Programmable square-wave output (32.768kHz to 0.5Hz)
• Interrupt output triggered by alarm match or periodic flag

Applications

• Power meters
• Industrial controls
• Servers

Procurement Notes

Verify that the ordering suffix 'T&R' corresponds to tape-and-reel packaging as specified in the manufacturer's documentation. Confirm RoHS compliance status via official datasheets. Ensure the component meets the required industrial temperature range specifications for the intended application environment.

Selection Notes

Select this component when a high-resolution elapsed time measurement is required using a parallel interface. The DS1318 supports both primary power timing and external event counting via the EXT pin. Consider the 244µs update rate and buffer synchronization methods (TE/UIP bits) when designing software to read time data accurately.

Part Context

The DS1318E+T&R belongs to the DS1318 series of elapsed time counters manufactured by Analog Devices / Maxim Integrated. The 'E+' designation indicates lead-free/RoHS-compliant construction, while 'T&R' specifies tape-and-reel packaging. This part is distinct from real-time clocks (RTC) as it measures cumulative elapsed time rather than calendar date and time.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.