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DS1077L Datasheet

  • DS1077L

  • 3V EconOscillator/Divider

  • 20頁(yè)

  • ETC

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DS1077L
3V EconOscillator/Divider
www.maxim-ic.com
FEATURES
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
Processor-controlled or stand-alone solid-
state oscillator
Frequency changes on the fly
Dual, low-jitter, synchronous fixed-
frequency outputs
2-wire serial interface
Frequency outputs 4.87kHz to 66.666MHz
鹵1.25% variation over temperature and
voltage
鹵0.5% initial tolerance
Nonvolatile frequency settings
Single 2.7V to 3.6V supply
No external components
Power-down mode
Synchronous output gating
PIN ASSIGNMENTS
OUT1
OUT0
V
CC
GND
1
2
3
4
8
7
6
5
SCL
SDA
CTRL1
CTRL0
150mil SO
118mil 碌SOP
PIN DESCRIPTIONS
OUT1
OUT0
V
CC
GND
CTRL1
CTRL0
SDA
SCL
STANDARD FREQUENCY OPTION
Note: x denotes package option
DS1077Lx-40
40.000MHz to 4.87kHz
DS1077Lx-50
50.000MHz to 6.09kHz
DS1077Lx-60
60.000MHz to 7.32kHz
DS1077Lx-66
66.666MHz to 8.13kHz
Contact the factory for the availability of
additional frequencies.
- Main Oscillator Output
- Reference Output
- Power-Supply Voltage
- Ground
- Control Pin for OUT1
- Control Pin for OUT0
- 2-Wire Serial Data
Input/Output
- 2-Wire Serial Clock
ORDERING INFORMATION
Note: XXX denotes frequency option
DS1077LZ-XXX 8-pin 150mil SO
DS1077LU-XXX 8-pin 118mil 碌SOP
DESCRIPTION
The DS1077L is a dual-output, programmable, fixed-frequency oscillator requiring no external
components for operation. The DS1077L can be used as a processor-controlled frequency synthesizer or
as a stand-alone oscillator. The two synchronous output operating frequencies are user-adjustable in
submultiples of the master frequency through the use of two on-chip programmable prescalers and
dividers. The specific output frequencies chosen are stored in nonvolatile (EEPROM) memory. The
DS1077L defaults to these values upon power-up.
The DS1077L features a 2-wire serial interface that allows in-circuit on-the-fly programming of the
programmable prescalers (P0 & P1) and divider (N) with the desired values being stored in nonvolatile
(EEPROM) memory. Design changes can be accommodated in-circuit, on-the-fly by simply programming
different values into the device (or reprogramming previously programmed devices). Alternatively, for
fixed-frequency applications previously programmed devices can be used and no connection to the serial
interface is required. Preprogrammed devices can be ordered in customer-requested frequencies.
The DS1077L is available in SO or 碌SOP packages, allowing the generation of a clock signal easily,
economically, and using minimal board area. Chip-scale packaging is also available on request.
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