DS1644-120+ Maxim Integrated Products, DS1644-120+ Datasheet - Page 13

• Manufacturer Part Number: DS1644-120+
• Description: IC RAM TIMEKEEP NV 120NS 28-EDIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAMr

Specifications of DS1644-120+

• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS1644P WITH DS9034PCX ATTACHED
RECOMMENDED POWERCAP MODULE LAND PATTERN
13 of 14
PKG
DIM
A
B
C
D
E
F
G
PKG
DIM
A
B
C
D
E
INCHES
MIN
0.920
0.955
0.240
0.052
0.048
0.015
0.020
INCHES
MIN
-
-
-
-
-
NOM
0.925
0.960
0.245
0.055
0.050
0.020
0.025
NOM
1.050
0.826
0.050
0.030
0.112
DS1644/DS1644P
MAX
0.930
0.965
0.250
0.058
0.052
0.025
0.030
MAX
-
-
-
-
-