DS1644-120+ Maxim Integrated Products, DS1644-120+ Datasheet - Page 7

• 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

ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground……………………………………………..-0.3V to +6.0V
Storage Temperature Range………………………………………………-40°C to +85°C, Noncondensing
Operating Temperature Range…….................…….......……………………0°C to +70°C, Noncondensing
Lead Temperature (soldering, 10s) ...................................................................................................+260°C
Soldering Temperature (reflow, PowerCap package) .......................................................................+260°C
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect
reliability.
RECOMMENDED DC OPERATING CONDITIONS
DC ELECTRICAL CHARACTERISTICS
PARAMETER
Supply Voltage
Logic 1 Voltage All Inputs
Logic 0 Voltage All Inputs
PARAMETER
Average V
TTL Standby Current (
CMOS Standby Current (
0.2V)
Input Leakage Current (any input)
Output Leakage Current
Output Logic 1 Voltage
(I
Output Logic 0 Voltage
(I
Power-Fail Voltage
OUT
OUT
= -1.0 mA)
= +2.1 mA)
CC
Power Supply Current
CE
CE
=V
=V
IH
)
CC
-
SYMBOL
SYMBOL
V
V
I
I
I
V
V
V
V
I
I
CC1
CC2
CC3
OL
IL
CC
OH
OL
IH
PF
IL
7 of 14
MIN
MIN
-0.3
4.5
2.2
2.4
4.0
-1
-1
TYP
TYP
(Over the Operating Range)
(Over the Operating Range)
V
MAX
MAX
CC
5.5
0.8
4.0
0.4
4.5
75
+1
+1
6
+0.3
UNITS
UNITS
mA
mA
mA
A
A
V
V
V
V
V
V
DS1644/DS1644P
NOTES
NOTES
1
3
3
3