ICS1523 Datasheet, PDF (4/21 Pages) Integrated Circuit Systems – Video Clock Synthesizer with I2C Programmable Delay

ICS1523
Video Clock Synthesizer with I²C Programmable Delay
Section 2 Pin Descriptions
PIN PIN NAME
NO.
TYPE DESCRIPTION
COMMENTS
1
VDDD
POWER Digital supply
3.3 V to digital sections
2
VSSD
3
SDA
4
SCL
POWER
IN/OUT
IN
Digital ground
Serial data
Serial clock
I²C-bus Data
I²C-bus Clock
5
COAST
IN
Charge pump enable Enables\Disables the charge pump
6
EXTFB
IN
External feedback in External feedback divider input
7
HSYNC
IN
Horizontal sync
Clock input to PLL
8
EXTFIL
IN
External filter
External loop filter
9
XFILRET
IN
External filter return External loop filter return
10 VDDA
POWER Analog supply
3.3 V for analog circuitry
11 VSSA
POWER Analog ground
Ground for analog circuitry
12 OSC
13 I²CADR
IN
Oscillator
IN
I²C address
Input from oscillator or other high
frequency input
Chip I²C address select
Low = 4Dh read, 4Ch write
High = 4Fh read, 4Eh write
14 LOCK/REF SSTL_3 OUT Lock / Reference
REF (Schmitt conditioned HSYNC) or
PLL lock output
15 FUNC
SSTL_3 OUT Function output
Output selectable between a 4 clock
wide, active high HSYNC-like output,
and a Schmitt-trigger filtered HSYNC
16 CLK/2
SSTL_3 OUT Pixel clock/2 output Output driver for half speed clock
17 CLK
SSTL_3 OUT Pixel clock output
Output driver for full speed clock
18 VDDQ
POWER Output driver supply 3.3 V to output drivers
19 VSSQ
POWER Output driver ground Ground for output drivers
20 CLK–
21 CLK+
OD OUT Pixel clock outputs PECL driver for full-speed clock
22 CLK/2–
23 CLK/2+
OD OUT Pixel clock/2 outputs PECL driver for half-speed clock
24 IREF
IN
Reference current
Reference current for PECL outputs
Notes
1
1
1
1
1
1&2
Note 1: These LVTTL inputs are 5 V-tolerant.
Note 2: Connect to ground if unused.
MDS ICS1523 Z
4
Integrated Device Technology, Inc. Tech Support: www.idt.com/go/clockhelp
Revision 052407