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MK1716-01 Datasheet

SERIAL PROGRAMMABLE PCI SS VERSACLOCK SYNTHESIZER

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DATASHEET
SERIAL PROGRAMMABLE PCI SS VERSACLOCK SYNTHESIZER MK1716-01
Description
Features
The MK1716-01 is a versatile serial programmable clock
source which takes up very little board space.
The device can simultaneously generate two groups of 4
output clocks and a reference clock output. Both clock
groups (CLKA and CLKB) are derived from a single PLL,
and have the ability to incorporate Spread Spectrum
frequency modulation for reduced system EMI. Each group
has control of independent PLL output divide values.
Outputs may be programmed on the fly, and will lock to a
new frequency in 10 ms or less.
Each of the two groups are powered by a separate VDDIO
voltage. The reference clock uses the fixed VDD voltage.
VDDIO may vary from 2.5 V to VDD.
The devices includes a OE pin which tri-states the output
clocks and when tied low.
IDT’s VersaClockTM software allows the user to generate
MK1716-01 device optimizing configuration code for target
output frequencies and spread spectrum amounts.
Block Diagram
Packaged in 28-pin SSOP
Operating voltage 3.3 V
Serially programmable: user determines the output
frequency via a 3-wire interface
Highly accurate frequency generation
M/N Multiplier PLL: M = 1..2048, N = 1..1024
Eliminates the need for custom Quartz Oscillators
Input crystal frequency of 5-27 MHz
Input clock frequency of 3-50 MHz
Output clock frequencies of 250 kHz to 133.33 MHz
Spread Spectrum frequency modulation for reduced
system EMI
Center or down spread ±0.5% min to 4% total
Selectable 32 kHz and 120 kHz modulation rate
Advanced, low power, sub-micron CMOS process
Separate VDD ‘s for each bank of 4 outputs
Output skew <250 ps within output bank
OE control on outputs
VDD
4
STROBE
SCLK
DATA
PLL
with
Spread
SpectrumCircuit
Crystal or
clock input
X1/ICLK
X2
Clock
Buffer/
Crystal
Ocsillator
External capacitors are
required with a crystal input.
6
GND
DIV A
DIV B
OE
VDDIOA
CLKA
4
VDDIOB
CLKB
4
REF OUT
IDT™ SERIAL PROGRAMMABLE PCI SS VERSACLOCK SYNTHESIZER 1
MK1716-01 REV H 051310


Renesas Electronics Components Datasheet

MK1716-01 Datasheet

SERIAL PROGRAMMABLE PCI SS VERSACLOCK SYNTHESIZER

No Preview Available !

MK1716-01
SERIAL PROGRAMMABLE PCI SS VERSACLOCK SYNTHESIZER
SSCG
Pin Assignment
DATA
1
X2
2
X1/ICLK
3
REFOUT
4
VDD
5
VDD
6
GND
7
GND
8
GND
9
CLKA
10
CLKA
11
CLKA
12
CLKA
13
VDDIOA
14
28
GND
27
STROBE
26
SCLK
25
OE
24
VDD
23
VDD
22
VDD
21
GND
20
GND
19
CLKB
18
CLKB
17
CLKB
16
CLKB
15
VDDIOB
Note:
Clock A and Clock B can be at the same frequency or not,
but must be powered by separate VDDs.
Pin Descriptions
Pin
Number
1
2
3
4
5-6
7-9
10-13
14
15
16-19
20-21
22-24
25
26
27
28
Pin
Name
DATA
X2
X1/ICLK
REFOUT
VDD
GND
CLKA
VDDIOA
VDDIOB
CLKB
GND
VDD
OE
SRCLK
STROBE
GND
Pin
Type
Pin Description
Input Serial shift register data input.
XO Connect to crystal. Leave open for clock input.
XI Connect this pin to a crystal or external clock input.
Output Reference clock output.
P Connect to +3.3 V.
P Connect to ground.
Output Output clock.
P Power supply to CLKA.
P Power supply to CLKB.
Output Output clock.
P Connect to ground.
P Connect to +3.3 V.
Input Output enable active high.
Input Serial shift register clock.
Input
Input
Strobe to load data. See timing diagram. Use external 250 kOhm
pull-up.
Connect to ground.
IDT™ SERIAL PROGRAMMABLE PCI SS VERSACLOCK SYNTHESIZER 2
MK1716-01 REV H 051310



Part Number MK1716-01
Description SERIAL PROGRAMMABLE PCI SS VERSACLOCK SYNTHESIZER
Maker Renesas
Total Page 3 Pages
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