DS1244Y-70 Maxim Integrated Products, DS1244Y-70 Datasheet - Page 6
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DS1244Y-70
Manufacturer Part Number
DS1244Y-70
Description
Real Time Clock
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1244Y-70.pdf
(19 pages)
Specifications of DS1244Y-70
Function
Clock, Calendar, NV SRAM Control
Rtc Memory Size
32768 B
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Rtc Bus Interface
Phantom Clock, Parallel
Package / Case
EMOD
Time Format
HH:MM:SS:hh
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DS1244Y-70
Manufacturer:
DALLAS
Quantity:
5 510
Company:
Part Number:
DS1244Y-70
Manufacturer:
MAXIM
Quantity:
5 510
Company:
Part Number:
DS1244Y-70+
Manufacturer:
Maxim
Quantity:
108
Company:
Part Number:
DS1244Y-70+
Manufacturer:
ADI
Quantity:
849
Company:
Part Number:
DS1244Y-70IND
Manufacturer:
SANYO
Quantity:
76
PHANTOM CLOCK REGISTER INFORMATION
The phantom clock information is contained in eight registers of 8 bits, each of which is sequentially
accessed 1 bit at a time after the 64-bit pattern recognition sequence has been completed. When updating
the phantom clock registers, each register must be handled in groups of 8 bits. Writing and reading
individual bits within a register could produce erroneous results. These read/write registers are defined in
Figure 2.
Data contained in the phantom clock register is in binary coded decimal (BCD) format. Reading and
writing the registers is always accomplished by stepping through all eight registers, starting with bit 0 of
register 0 and ending with bit 7 of register 7.
Figure 1. PHANTOM CLOCK REGISTER DEFINITION
NOTE: THE PATTERN RECOGNITION IN HEX IS C5, 3A, A3, 5C, C5, 3A, A3, 5C. THE ODDS OF THIS PATTERN BEING
ACCIDENTALLY DUPLICATED AND CAUSING INADVERTENT ENTRY TO THE PHANTOM CLOCK IS LESS THAN 1 IN
10
19
. THIS PATTERN IS SENT TO THE PHANTOM CLOCK LSB TO MSB.
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