DS1744-70+ Maxim Integrated Products, DS1744-70+ Datasheet - Page 14
![IC RTC RAM Y2K 5V 70NS 28-EDIP](/photos/6/58/65855/ds1225ab-200__sml.jpg)
DS1744-70+
Manufacturer Part Number
DS1744-70+
Description
IC RTC RAM Y2K 5V 70NS 28-EDIP
Manufacturer
Maxim Integrated Products
Type
Clock/Calendar/NVSRAM/Y2Kr
Datasheet
1.DS1744W-120.pdf
(16 pages)
Specifications of DS1744-70+
Memory Size
256K (32K x 8)
Time Format
HH:MM:SS (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
28-DIP Module (600 mil), 28-EDIP
Function
Clock/Calendar/NV Timekeeping RAM
Rtc Memory Size
32768 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
Parallel
Supply Current
75 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
POWER-UP/DOWN CHARACTERISTICS (3.3V)
(V
Down
V
V
V
Expected Data-Retention Time
(Oscillator ON)
POWER-UP/DOWN WAVEFORM TIMING (3.3V DEVICE)
CAPACITANCE
(T
Capacitance On All Input Pins
Capacitance On All Output Pins
CE or WE at V
CC
CC
PF
CC
A
= +25°C)
to RST High
Fall Time: V
Rise Time: V
= 3.3V 10%, T
PARAMETER
PARAMETER
IH
PF(MAX)
PF(MIN)
, Before Power-
A
= Over the operating range.)
to V
to V
PF(MIN)
PF(MAX)
SYMBOL
SYMBOL
C
C
IN
O
DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
t
t
t
REC
t
PD
t
DR
R
F
14 of 16
MIN
MIN
300
10
0
0
TYP
TYP
MAX
14
10
MAX
35
UNITS
pF
pF
UNITS
years
ms
s
s
s
NOTES
NOTES
5, 6