DS1089LU-22F Maxim Integrated Products, DS1089LU-22F Datasheet - Page 11

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DS1089LU-22F

Manufacturer Part Number
DS1089LU-22F
Description
Timers & Support Products 3.3V Center Spread-S pectrum EconOscillat
Manufacturer
Maxim Integrated Products
Datasheet
To achieve the best results when using the DS1089L,
decouple the power supply with 0.01µF and 0.1µF
high-quality, ceramic, surface-mount capacitors.
Surface-mount components minimize lead inductance,
which improves performance, and ceramic capacitors
Figure 5. I
Figure 6. I
3.3V Center Spread-Spectrum EconOscillator™
*THE ADDRESS DETERMINED BY A0, A1, AND A2 MUST
SDA
SCL
TYPICAL I
MATCH THE ADDRESS SET IN THE ADDR REGISTER.
EXAMPLE I
START
STOP
2
2
A) SINGLE BYTE WRITE
-WRITE PRESCALER
REGISTER TO 128
B) SINGLE BYTE READ
-READ PRESCALER
REGISTER
2
MSB
C AC Characteristics
C Transactions
C WRITE TRANSACTION
2
DEVICE IDENTIFIER
1
C TRANSACTIONS (WHEN A0, A1, AND A2 ARE ZERO)
t
BUF
0
Applications Information
START
1
1
Power-Supply Decoupling
A2*
ADDRESS
t
DEVICE
t
HD:STA
LOW
START
START
A1*
A0*
1 0 1 1 0 0 0 0
1 0 1 1 0 0 0 0
READ/
WRITE
LSB
R/W
B0h
B0h
SLAVE
t
____________________________________________________________________
R
t
ACK
HD:DAT
SLAVE
SLAVE
ACK
ACK
MSB
b7
t
0 0 0 0 0 0 1 0
0 0 0 0 0 0 1 0
F
COMMAND/REGISTER ADDRESS
b6
t
HIGH
02h
02h
b5
b4
t
SLAVE
SLAVE
SU:DAT
ACK
ACK
b3
1 0 0 0 0 0 0 0
b2
tend to have adequate high-frequency response for
decoupling applications. These capacitors should be
placed as close to the V
SCL and SDA cannot be left floating even in stand-
alone mode. If the DS1089L will never need to be pro-
grammed in-circuit, including during production
testing, SDA and SCL can be connected high.
REPEATED
START
DATA
b1
REPEATED
START
LSB
b0
1 0 1 1 0 0 0 1
SLAVE
ACK
SLAVE
SLAVE
ACK
ACK
B1h
t
SU:STA
t
HD:STA
MSB
STOP
b7
SLAVE
ACK
b6
1 0 0 0 0 0 0 0
b5
CC
DATA
b4
DATA
and GND pins as possible.
b3
MASTER
NACK
Stand-Alone Mode
b2
t
SP
b1
STOP
LSB
b0
t
SLAVE
SU:STO
ACK
STOP
11

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