DS1081LE/T+C01 Maxim Integrated Products, DS1081LE/T+C01 Datasheet - Page 5

• Manufacturer Part Number: DS1081LE/T+C01
• Description: Timers & Support Products Spread-Spectrum Cloc k Modulator for LCD
• Manufacturer: Maxim Integrated Products

Specifications of DS1081LE/T+C01

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5
© 2007 Maxim Integrated Products
On power-up, the output clock (SSO) remains tri-stated
until the internal PLL reaches a stable frequency. The
SSEN input can be used to disable the spread-spec-
trum modulation and to tri-state the SSO output. If the
SSEN pin is pulled high, the spread-spectrum modula-
tion is turned off, but the device still uses the internal
PLL to generate the clock signal at SSO. If the SSEN pin
is floated, the output will be tri-stated.
Figure 1. DS1081L Spread-Spectrum Frequency Modulation
For the latest package outline information, go to www.maxim-ic.com/DallasPackInfo.
is a registered trademark of Dallas Semiconductor Corporation.
f
f
IN
IN
+ (0.5%, 1.0%, 1.5%, OR 2.0% OF f
- (0.5%, 1.0%, 1.5%, OR 2.0% OF f
CLKIN RANGE (MHz)
Spread-Spectrum Enable
66 TO 134
20 TO 38
NOTE: IN THE ABOVE CONFIGURATION WITH SMSEL1, SMSEL2, AND SSEN CONNECTED TO GND AS WELL AS
CRSEL CONNECTED TO V
SPREAD-SPECTRUM MAGNITUDE OF ±2.0%, AND ALLOWS A CLKIN BETWEEN 20MHz and 38MHz.
33 TO 80
20MHz to 134MHz Spread-Spectrum
f
134MHz
IN
= 20MHz TO
DITHER RATE
f
SSO
IN
IN
f
IN
f
f
Clock Modulator for LCD Panels
)
)
IN
IN
f
IN
CC
/2048
/1024
/512
AND SSEN CONNECTED TO GND, THE DEVICE IS CONFIGURED WITH A
CLKIN
SMSEL1
SMSEL2
GND
DITHER CYCLE
RATE
1
DS1081L
TIME
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, surface-mount
capacitor, and mount it as close as possible to the V
and GND pins of the IC to minimize lead inductance.
is a registered trademark of Maxim Integrated Products, Inc.
CRSEL
SSEN
SSO
V
CC
IF SSEN = 1
DITHERED
f
SSO
Typical Operating Circuit
Application Information
DITHER AMOUNT
(±0.5%, ±1.0%, ±1.5%, OR ±2.0%)
Package Information
V
CC
Power-Supply Decoupling
DECOUPLING
CAPACITOR
CC