PLL701-05 PhaseLink (PLL), PLL701-05 Datasheet - Page 3

• Manufacturer Part Number: PLL701-05
• Description: Low EMI Spread Spectrum Multiplier IC
• Manufacturer: PhaseLink (PLL)

FUNCTIONAL DESCRIPTION
Selectable spread spectrum and modulation magnitude
The PLL701-50 provides selectable multiplier factors (1x to 8X), selectable spread spectrum modulation type, as
well as selectable modulation magnitude. Selection is made by connecting specific input pins to a logical “zero” or
“one”. Pins 6 (SC0), 7 (SC1), 8 (SC2) and 12 (SC3) are used as inputs to select the spread spectrum modulation
magnitude as shown on the spread spectrum selection table (page 2). Pins 3 (M2), 4 (M1), 5 (M0) are used as
inputs to select the multiplication factor as shown on the output clock selection table (page 1). Pin 11 is the output
enable pin, which tri-states all outputs when low (logical “zero”).
In order to reduce the number of pins on the chip, the PLL701-50 uses pins 2 and 14 (XOUT/SD0 and REF/SD1) as
bi-directional pins. The pins serve as modulation type selector inputs (SD0 and SD1) upon power-up (see spread
spectrum selection table on page 2), and as XOUT crystal connection (pin 2), and REF output signal (pin 14) as
soon as the inputs have been latched.
Connecting a selection pin to a logical “one”
All selection pins have an internal pull-up resistor (30kΩ for pins 3, 4, 5, 6, 7, 8, 11, 12, 14 and 120kΩ for pin 2).
This internal pull-up resistor will pull the input value to a logical “one” (pull-up) by default, i.e. when no resistive
load is connected between the pin and GND. No external pull-up resistor is therefore required for connecting a
logical “one” upon power-up.
Connecting a selection pin to a logical “zero”
For an input only pin, i.e. all input pins except XOUT/SD0 (pin 2) and REF/SD1 (pin 14), the pin simply needs to be
grounded to pull the input down to a logical “zero”. For the Bidirectional pins ( pins 2 and 14 ) you will need an
external resistor. For pin 2 a 27kΩ resistor is recommended and for pin 14 a 4.7kΩ resistor is recommended.
ELECTRICAL SPECIFICATIONS
1. Absolute Maximum Ratings
Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the
device and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other
conditions above the operational limits noted in this specification is not implied.
* Note: Operating Temperature is guaranteed by design for all parts (COMMERCIAL and INDUSTRIAL), but tested for COMMERCIAL grade only.
47745 Fremont Blvd., Fremont, California 94538 Tel [phone] Fax [phone]
Supply Voltage
Input Voltage, dc
Output Voltage, dc
Storage Temperature
Ambient Operating Temperature*
Junction Temperature
Lead Temperature (soldering, 10s)
ESD Protection, Human Body Model
PARAMETERS
Low EMI Spread Spectrum Multiplier IC
SYMBOL
V
V
T
T
V
T
DD
O
S
A
J
I
www.phaselink.com
MIN.
-0.5
-0.5
-65
-40
PLL701-50
V
V
MAX.
DD
DD
150
125
260
4.6
85
2
+0.5
+0.5
Rev 09/20/04 Page 3
UNITS
°C
°C
°C
°C
kV
V
V
V