DS32KHZ-N/DIP DALLAS [Dallas Semiconductor], DS32KHZ-N/DIP Datasheet - Page 6

• Manufacturer Part Number: DS32KHZ-N/DIP
• Description: 32.768kHz Temperature-Compensated Crystal Oscillator
• Manufacturer: DALLAS [Dallas Semiconductor]

Figure 2. Block Diagram
OPERATION
The DS32kHz module contains a crystal and an IC. While powered, the DS32kHz peridocially measures the
temperature and adjusts the crystal load to compensate.
The DS32kHz is designed to operate in two modes. In the dual-supply mode, a comparator circuit, powered by V
monitors the relationship between the V
V
while V
In the single-supply mode, V
of V
Figure 3A shows how the DS32kHz should be connected when using two power supplies. V
4.5V and 5.5V and V
only a single-supply system is available. V
5.5V. The V
held at +5V. See the frequency stability versus operating voltage for information about frequency error versus
supply voltage.
Figure 3. Power-Supply Connections
BAT
CC
, the device switches over to V
, because the comparator circuit is unpowered (Figure 3B).
CC
is applied.
BAT
pin should be connected directly to a battery. Figure 3C shows a single supply mode where V
BAT
should be between 2.7V and 3.3V. Figure 3B shows how the DS32kHz can be used when
CC
is grounded and the unit is powered by V
BAT
(Figure 3A). This mode uses V
CC
and V
CC
should be grounded and V
BAT
input levels. When V
6 of 10
CC
CC
BAT
to conserve the battery connected to V
BAT
drops below a certain level compared to
should then be held between 2.7V and
. Current consumption is less than that
CC
should be between
CC
CC
BAT
is
,