ds2065w Maxim Integrated Products, Inc., ds2065w Datasheet - Page 11

• Manufacturer Part Number: ds2065w
• Description: 3.3v Single-piece 8mb Nonvolatile Sram Integrated Products
• Manufacturer: Maxim Integrated Products, Inc.

Recommended Reflow Temperature Profile
Note: All temperatures refer to top side of the package, mea-
sured on the package body surface.
The DS2065W may be cleaned using aqueous-based
cleaning solutions. No special precautions are needed
when cleaning boards containing a DS2065W module.
Removal of the topside label violates the environmen-
tal integrity of the package and voids the warranty of
the product.
Average ramp-up rate
(T
Preheat
- Temperature min (T
- Temperature max (T
- Time (min to max) (ts)
T
- Ramp-up rate
Time maintained above:
-
- Time (t
Peak temperature (T
Time within 5°C of actual peak
temperature (T
Ramp-down rate
Time 25°C to peak temperature
Temperature (T
Smax
L
to T
to T
PROFILE FEATURE
P
L
)
)
Recommended Cleaning Procedures
L
P
)
L
)
P
Smin
)
Smax
)
)
Sn-Pb EUTECTIC
60 to 120 seconds
60 to 150 seconds
10 to 30 seconds
3°C/second max
6°C/second max
DS2065W 3.3V Single-Piece 8Mb
____________________________________________________________________
6 minutes max
ASSEMBLY
225 +0/-5°C
100°C
150°C
183°C
To achieve the best results when using the DS2065W,
decouple the power supply with a 0.1µF capacitor. Use
a high-quality, ceramic surface-mount capacitor if pos-
sible. Surface-mount components minimize lead induc-
tance, which improves performance, while ceramic
capacitors have adequately high frequency response
for decoupling applications.
The RST output is open drain, and therefore requires a
pullup resistor to realize a high logic output level. Pullup
resistor values between 1kΩ and 10kΩ are typical.
The DS2065W charges an ML battery to maximum
capacity in approximately 96 hours of operation when
V
its lifetime depends primarily on the V
The DS2065W can maintain data from a single, initial
charge for up to 3 years. Once recharged, this deep-
discharge cycle can be repeated up to 20 times, pro-
ducing a worst-case service life of 60 years. More
typical duty cycles are of shorter duration, enabling the
DS2065W to be charged hundreds of times, therefore
extending the service life well beyond 60 years.
CC
is greater than V
Nonvolatile SRAM
Using the Open-Drain
Applications Information
TP
Battery Charging/Lifetime
Power-Supply Decoupling
. Once the battery is charged,
CC
RST Output
duty cycle.
11