CMX641A Ver la hoja de datos (PDF) - MX-COM Inc
Número de pieza
componentes Descripción
Lista de partido
CMX641A Datasheet PDF : 23 Pages
| |||
Dual SPM/Security Detector/Generator
5. Application Notes
14 of 23
CMX641A Advance Information
5.1 Signal Input Configurations
Figure 3 shows how the input amplifiers can be connected as differential mode or common mode amplifiers,
according to the application.
Differential Input
Single Ended Input
Tip
Ring
INPUT AMP
CMX641A (Part)
VBI AS
INPUT AMP
CMX641A (Part)
VBI AS
VSS
VSS
Figure 3: Example Input Configurations
5.2 Crystal/Clock Distribution
The CMX641A requires a 3.579545MHz crystal or an external clock pulse input. With the exception of the
crystal, all oscillator components are incorporated on chip. If a crystal is employed, the Clock Out pin should
be connected directly to the Clock In pin.
To reduce component and layout complexity the clock requirements of up to 3 additional CMX641A
microcircuits may be supplied from a crystal driven CMX641A acting as the master system clock. With
reference to Figure 4, the clock should be distributed as illustrated and the XTAL pins of the driven devices
should be connected directly to VDD.
Note that the maximum load on the master Clock Out pin should not be exceeded.
µController
I/O Ports
CLOCK
OUT
CLOCK
IN
XTAL
X1
XTALN
CMX641A
(used as Master
Oscillator)
VDD
3 to ‘N’ LINE
DECODER
"OUTPUT ENABLE" ADDRESSING
CLOCK
IN
CMX641A
CLOCK
IN
CMX641A
CLOCK
IN
CMX641A
Figure 4: Example of Clock Distribution and 8-Channel Output Multiplexing
ã2001 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480227.002
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
Share Link: 