DS1245Y Datasheet, PDF (3/12 Pages) Dallas Semiconductor – 1024k Nonvolatile SRAM

DS1245Y/AB
PACKAGES
The DS1245 devices are available in two packages: 32-pin DIP and 34-pin PowerCap Module (PCM).
The 32-pin DIP integrates a lithium battery, an SRAM memory and a nonvolatile control function into a
single package with a JEDEC-standard 600-mil DIP pinout. The 34-pin PowerCap Module integrates
SRAM memory and nonvolatile control along with contacts for connection to the lithium battery in the
DS9034PC PowerCap. The PowerCap Module package design allows a DS1245 PCM device to be
surface mounted without subjecting its lithium backup battery to destructive high-temperature reflow
soldering. After a DS1245 PCM is reflow soldered, a DS9034PC PowerCap is snapped on top of the
PCM to form a complete Nonvolatile SRAM module. The DS9034PC is keyed to prevent improper
attachment. DS1245 PowerCap Modules and DS9034PC PowerCaps are ordered separately and shipped
in separate containers. See the DS9034PC data sheet for further information.
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature
Storage Temperature
Soldering Temperature
-0.3V to +7.0V
0°C to 70°C, -40°C to +85°C for Ind parts
-40°C to +70°C, -40°C to +85°C for Ind parts
260°C for 10 seconds
* 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
PARAMETER
SYMBOL MIN TYP
DS1245AB Power Supply Voltage
V_CC
4.75 5.0
DS1245Y Power Supply Voltage
V_CC
4.5 5.0
Logic 1
V_IH
2.2
Logic 0
V_IL
0.0
(t_A: See Note 10)
MAX UNITS NOTES
5.25
V
5.5
V
V_CC
V
0.8
V
DC ELECTRICAL
CHARACTERISTICS
PARAMETER
Input Leakage Current
I/O Leakage Current CE ≥ V_IH ≤ V_CC
Output Current @ 2.4V
Output Current @ 0.4V
Standby Current CE =2.2V
Standby Current CE =V_CC-0.5V
Operating Current
Write Protection Voltage (DS1245AB)
Write Protection Voltage (DS1245Y)
(V_CC=5V ±=5% for DS1245AB)
(t_A: See Note 10) (V_CC=5V ±=10% for DS1245Y)
SYMBOL MIN TYP MAX UNITS NOTES
I_IL
-1.0
+1.0
µA
I_IO
-1.0
+1.0
µA
I_OH
-1.0
mA
I_OL
2.0
mA
I_CCS1
5.0 10.0
mA
I_CCS2
3.0
5.0
mA
I_CCO1
85
mA
V_TP
4.50 4.62 4.75
V
V_TP
4.25 4.37 4.5
V
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