Product Summary

The DP8572AN is a Real Time Clock (RTC). It is intended for use in microprocessor based systems where information is required for multi-tasking, data logging or general time of day/date information. The DP8572AN is implemented in low voltage silicon gate microCMOS technology to provide low standby power in battery back-up environments. The circuit’s architecture is such that it looks like a contiguous block of memory or I/O ports. The address space is organized as 2 software selectable pages of 32 bytes. The DP8572AN includes the Control Registers, the Clock Counters, the Alarm Compare RAM, and the Time Save RAM. Any of the RAM locations that are not being used for their intended purpose may be used as general purpose CMOS RAM.

Parametrics

DP8572AN absolute maximum ratings: (1)Supply Voltage (VCC): -0.5V to +7.0V; (2)DC Input Voltage (VIN): -0.5V to VCC + 0.5V; (3)DC Output Voltage (VOUT): -0.5V to VCC + 0.5V; (4)Storage Temperature Range: -65℃ to +150℃; (5)Power Dissipation (PD): 500 mW; (6)Lead Temperature (Soldering, 10 sec.): 260℃.

Features

DP8572AN features: (1)Full function real time clock/calendar: 12/24 hour mode timekeeping, Day of week and day of years counters, Four selectable oscillator frequencies, Parallel resonant oscillator; (2)Power fail features: Internal power supply switch to external battery, Power Supply Bus glitch protection, Automatic log of time into RAM at power failure; (3)On-chip interrupt structure: Periodic, alarm, and power fail interrupts; (4)Up to 44 bytes of CMOS RAM; (5)MIL-STD-883C compliant; (6)SMD Y5962-91641-01MJX (future).

Diagrams

DP8521AV
DP8521AV

Other


Data Sheet

Negotiable 
DP8570A
DP8570A

Other


Data Sheet

Negotiable 
DP8570AV
DP8570AV

National Semiconductor (TI)

Real Time Clock

Data Sheet

0-1: $19.04
1-25: $17.14
25-100: $15.71
100-250: $13.80
DP8570AV/NOPB
DP8570AV/NOPB

National Semiconductor (TI)

Real Time Clock

Data Sheet

0-1: $19.04
1-25: $13.06
25-100: $12.60
100-250: $11.60
DP8570AVX
DP8570AVX

National Semiconductor (TI)

Real Time Clock

Data Sheet

0-750: $13.09
DP8570AVX/NOPB
DP8570AVX/NOPB

National Semiconductor (TI)

Real Time Clock

Data Sheet

0-418: $13.81
418-500: $10.21
500-750: $10.21