CLRC632 Datasheet, PDF (157/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
22.5.3 CLOCK FREQUENCY
The clock input is pin 1, OSCIN.
PARAMETER
Clock Frequency (checked by the clock filter)
Duty Cycle of Clock Frequency
Jitter of Clock Edges
SYMBOL
f_OSCIN
d_FEC
t_jitter
MIN
40
TYP
13.56
50
MAX
60
10
UNIT
MHz
%
ps
The clock applied to the CL RC632 acts as time basis for the coder and decoder of the synchronous system.
Therefore stability of clock frequency is an important factor for proper performance. To obtain highest
performance, clock jitter shall be as small as possible. This is best achieved using the internal oscillator
buffer with the recommended circuitry (see 12).
157
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