DS17887-5+ Maxim Integrated Products, DS17887-5+ Datasheet - Page 10
![IC RTC 5V 8K NV RAM 24-EDIP](/photos/6/58/65847/175-24-dip_sml.jpg)
DS17887-5+
Manufacturer Part Number
DS17887-5+
Description
IC RTC 5V 8K NV RAM 24-EDIP
Manufacturer
Maxim Integrated Products
Type
Clock/Calendar/NVSRAMr
Datasheet
1.DS17285S-5.pdf
(31 pages)
Specifications of DS17887-5+
Memory Size
64K (8K x 8)
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
Through Hole
Package / Case
24-DIP (600 mil) Module
Function
Clock/Calendar/Alarm
Rtc Memory Size
8192 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
Through Hole
Rtc Bus Interface
Multiplexed
Supply Current
25 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Real-Time Clocks
Figure 1. Functional Diagram
10
____________________________________________________________________
DS17x87
ONLY
AD0–AD7
ALE
WR
CS
RD
V
BAUX
V
GND
V
BAT
CC
X1
X2
OSCILLATOR
INTERFACE
CONTROL
POWER
DS17x85/87
BUS
DIVIDE
CLOCK/CALENDAR
BY 8
EXTENDED
USER RAM
UPDATE LOGIC
2k/4k/8k
BYTES
DIVIDE BY
64
64-BIT SERIAL NUMBER
EXTENDED RAM ADDR/
16:1 MUX
EXTENDED CONTROL/
STATUS REGISTERS
CENTURY COUNTER
DATA REGISTERS
RTC ADDRESS-2
RTC ADDRESS-3
DATE ALARM
CLOCK/CALENDAR AND
CALENDAR AND ALARM
USER RAM
114 BYTES
REGISTERS A, B, C, D
ALARM REGISTERS
BUFFERED CLOCK/
SELECT
REGISTERS
GENERATOR
GENERATOR
SQUARE-
WAVE
CLEAR
LOGIC
RAM
IRQ
DIVIDE BY
64
IRQ
PWR
KS
SQW
RLCR