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DS1099 Datasheet, PDF (6/6 Pages) Dallas Semiconductor – Low-Frequency Dual EconOscillator
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Low-Frequency Dual EconOscillator
The divider settings, X0 and X1, are factory pro-
grammed. When placing an order for the DS1099, it is
required to specify X0 and X1. If only one output is used,
it is recommended that the unused output be disabled.
The oscillator outputs are asynchronous. Since the
master oscillator and dividers are free running, even
when both outputs are disabled, the state of the output
when OE becomes active is unknown for up to half an
fOUT period. When OE is brought low, the output is
enabled instantaneously. Likewise, if the output is dis-
abled while outputting the low half of a cycle, the out-
put instantaneously is forced high before the current
cycle is completed.
Ordering Information (continued)
α
DIVISOR
A
20
B
21
C
22
D
23
E
24
F
25
G
26
H
27
J
28
K
29
L
210
M
211
N
212
P
213
Q
214
R
215
S
216
T
217
U
218
W
219
X
220
Y
221
Z
222
fOUT
1.048MHz
0.524MHz
0.262MHz
0.131MHz
65.50kHz
32.750kHz
16.375kHz
8.187kHz
4.093kHz
2.046kHz
1.023kHz
511.7Hz
255.8Hz
127.9Hz
63.96Hz
31.98Hz
16Hz
8Hz
4Hz
2Hz
1Hz
0.5Hz
0.25Hz
Branding Information
The package branding includes α0 and α1 on the top
of the package next to or below 1099.
Application Information
Power-Supply Decoupling
To achieve best results, it is highly recommended that
a decoupling capacitor is used on the IC power-supply
pins. Typical values of decoupling capacitors are
0.01µF and 0.1µF. Use a high-quality, ceramic, sur-
face-mount capacitor, and mount it as close as possi-
ble to the VCC and GND pins of the IC to minimize lead
inductance.
Chip Topology
TRANSISTOR COUNT: 4221
SUBSTRATE CONNECTED TO GROUND
Package Information
For the latest package outline information, go to
www.maxim-ic.com/DallasPackInfo.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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