DS1744W-120 Maxim Integrated Products, DS1744W-120 Datasheet - Page 14

• Manufacturer Part Number: DS1744W-120
• Description: IC RTC RAM Y2K 3.3V 120NS 28EDIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAM/Y2Kr

Specifications of DS1744W-120

• Memory Size: 256K (32K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP Module (600 mil), 28-EDIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-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