DS1260-100 Maxim Integrated Products, DS1260-100 Datasheet - Page 2

• Manufacturer Part Number: DS1260-100
• Description: IC SMART BATTERY 3V 16-DIP
• Manufacturer: Maxim Integrated Products

Specifications of DS1260-100

• Function: Back-Up Management
• Battery Type: Lithium Cell
• Voltage - Supply: *
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP Module (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: DS1260100

OPERATION
During normal operation V
V
this time the power-fail signal (
However, if the V
below the level of the lithium supply (V
supplies power to the uninterruptible output (V
On power-up, as the V
supply. As the V
During normal operation, BAT (Pin 5) stays at the battery level of 3 volts, regardless of the level of V
BATTERY FAIL
When power is being supplied from the primary energy source,
provided that the lithium energy source is greater than 2 volts. If the lithium energy source should
decrease to below 2 volts, the
RESET
The reset input can be used to prevent the lithium energy source from supplying power to V
even if V
level (V
removed after pulsing RST, the V
power is applied such that V
by the lithium energy source when V
Figure 3 shows how the SmartBattery is used in a system application.
BLOCK DIAGRAM Figure 1
BF
CCO
signal is always low when power is being supplied by the lithium energy source.
(pins 12 and 13) through an internal switch at a voltage level of V
IH
CCI
) for 50ns minimum while primary power is valid (see Figure 2). When primary power is
falls below 3 volts. This feature is activated by applying a pulsed input on RST to a high
CCI
CCI
input rises above 4.25 volts, the power-fail signal is driven back to the high level.
falls below the level of 4.25 volts, the power-fail signal is driven low. As V
CCI
CCI
supply rises above 3 volts, the primary energy source, V
CCI
BF
(pins 15 and 16) is the primary energy source and power is supplied to
is greater than V
CCO
signal is driven low (V
PF
CCI
) is held high, indicating valid primary voltage (see Figure 1).
output and BAT will go to high impedance. The next time primary
again falls below 3 volts. BAT will also return to the level V
BAT
= 3 volts), power is switched and the lithium energy source
CCO
BAT
2 of 8
) at V
, normal operation resumes and V
BAT
OL
-0.2 volts @ 5 mA.
), indicating an exhausted lithium battery. The
BF
(Pin 3) is held at a high level (V
CCI
-0.2 volts @ 250 mA. During
CCO
CCI
will be supplied
, becomes the
CCO
and BAT
CCI
DS1260
falls
CCI
BAT
OH
.
),
.