DS12885Q+ Maxim Integrated Products, DS12885Q+ Datasheet - Page 14

• Manufacturer Part Number: DS12885Q+
• Description: IC RTC W/RAM 128 BYTE 28-PLCC
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAMr

Specifications of DS12885Q+

• Memory Size: 114B
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-LCC, 28-PLCC
• Function: Clock/Calendar/Alarm
• Rtc Memory Size: 114 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Multiplexed
• Supply Current: 15 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Real-Time Clocks
Table 2B. Time, Calendar, and Alarm Data Modes—Binary Mode (DM = 1)
X = Read/Write Bit.
* DS12C887, DS12C887A only. General-purpose RAM on DS12885, DS12887, and DS12887A.
Note: Unless otherwise specified, the state of the registers is not defined when power is first applied. Except for the seconds regis-
ter, 0 bits in the time and date registers can be written to 1, but may be modified when the clock updates. 0 bits should always be
written to 0 except for alarm mask bits.
14
ADDRESS
0EH-31H
33H-7FH
0AH
0BH
0CH
0DH
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
32H
____________________________________________________________________
AM/PM
AM/PM
BIT 7
IRQF
SET
VRT
UIP
X
X
0
0
0
0
0
0
0
0
0
0
BIT 6
DV2
PIE
PF
X
X
0
0
0
0
0
0
0
0
0
0
N/A
BIT 5
DV1
AIE
AF
X
0
X
0
0
0
0
0
BIT 4
DV0
UIE
UF
0
X
0
0
0
0
X
Year
SQWE
BIT 3
RS3
Seconds
Seconds
Minutes
Minutes
X
X
0
0
0
Hours
Hours
Date
BIT 2
RS2
DM
0
0
X
X
Month
Hours
Hours
N/A
24/12
BIT 1
RS1
X
0
0
X
Day
BIT 0
DSE
RS0
X
0
0
X
Seconds Alarm
Minutes Alarm
Hours Alarm
FUNCTION
Seconds
Century*
Minutes
Control
Control
Control
Control
Month
Hours
Date
Year
RAM
RAM
Day
01–0C +AM/PM
01–0C +AM/PM
RANGE
00–3B
00–3B
00–3B
00–3B
01–0C
00–17
00–17
01–07
01–1F
00–63
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