DS17487-5+ Maxim Integrated Products, DS17487-5+ Datasheet - Page 10

• Manufacturer Part Number: DS17487-5+
• Description: IC RTC 5V 4K NV RAM 24-EDIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAMr

Specifications of DS17487-5+

• Memory Size: 32K (4K 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: 4096 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