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Renesas Electronics Components Datasheet

ICS307-03 Datasheet

SERIALLY PROGRAMMABLE CLOCK SOURCE

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SERIALLY PROGRAMMABLE CLOCK SOURCE
DATASHEET
ICS307-03
Description
The ICS307-03 is a dynamic, serially programmable clock
source which is flexible and takes up minimal board space.
Output frequencies are programmed via a 3-wire SPI port.
An advanced PLL coupled to an array of configurable
output dividers and three outputs allows low-jitter
generation of frequencies from 200 Hz to 270 MHz.
The device can be reprogrammed during operation, making
it ideal for applications where many different frequencies
are required, or where the output frequency must be
determined at run time. Glitch-free frequency transitions,
where the clock period changes slightly over many cycles,
are possible.
Features
Crystal or clock reference input
3.3 V CMOS outputs
Three outputs can be individually configured or shut off
Small 16-pin TSSOP package – Pb-free, RoHS
compliant
Reprogrammable during operation
3-wire SPI serial interface
Glitch-free output frequency switching
User selectable charge pump current and damping
resistor
Power-down control via hardware pin or software control
bit
Programming word can be generated by IDT VersaClock
II Software
Directly programmable via VersaClock II Software and a
Windows PC parallel port
Industrial temperature range available
Block Diagram
(Table 1)
REF Divide
X1
1-2055
[Bit 122]
X2
Charge Pump
(Table 3)
CP 11pF
Resistor
(Table 4)
300
pF
VCO DIVIDE
12-2055
(Table 2)
DIN
CS
SCLK
Programming
Register
(132 bits)
Divider
2 - 8232
(Table 5)
[Bit 110]
CLK1
1
0
[Bit 123]
Divider
2 - 34
(Table 6)
[Bit 111]
CLK2
1
0
[Bit 124]
Divider
2 - 34
(Table 7)
[Bit 129]
CLK3
IDT® SERIALLY PROGRAMMABLE CLOCK SOURCE
1
ICS307-03 REV L 032911


Renesas Electronics Components Datasheet

ICS307-03 Datasheet

SERIALLY PROGRAMMABLE CLOCK SOURCE

No Preview Available !

ICS307-03
SERIALLY PROGRAMMABLE CLOCK SOURCE
SER PROG CLOCK SYNTHESIZER
Pin Assignment
X1
VDD
VDD
VDD
GND
GND
GND
CLK1
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
16-pin TSSOP
X2
PD
CLK3
GND
CLK2
DIN
CS
SCLK
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin
Name
X1
VDD
VDD
VDD
GND
GND
GND
CLK1
SCLK
CS
DIN
CLK2
GND
CLK3
PD
X2
Pin
Type
XI
Power
Power
Power
Power
Power
Power
Output
Input
Input
Input
Output
Power
Output
Input
-
Pin Description
Connect to input reference clock or crystal.
Power connection for crystal oscillator.
Power connection for PLL.
Power connection for inputs and outputs.
Ground connection for crystal oscillator.
Ground connection for PLL.
Ground connection for inputs and outputs.
Clock 1 output.
Programming interface - Serial clock input. Internal pull-up.
Programming interface - LOAD input. Internal pull-down.
Programming interface - Serial data input. Internal pull-up.
Clock 2 output.
Ground connection.
Clock 3 output.
Crystal, PLL, and outputs are powered-down when low. Internal pull-up.
Connect to crystal. Leave open if reference clock input is used.
IDT® SERIALLY PROGRAMMABLE CLOCK SOURCE
2
ICS307-03 REV L 032911



Part Number ICS307-03
Description SERIALLY PROGRAMMABLE CLOCK SOURCE
Maker Renesas
Total Page 3 Pages
PDF Download

ICS307-03 Datasheet PDF





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