Specifications

CY14C101PA
CY14B101PA
CY14E101PA
Document Number: 001-54392 Rev. *N Page 25 of 44
RTC External Components
The RTC requires connecting an external 32.768 kHz crystal and C
1
, C
2
load capacitance as shown in the Figure 32. The figure shows
the recommnded RTC external component values. The load capacitances C
1
and C
2
are inclusive of parasitic of the printed circuit
board (PCB). The PCB parasitic includes the capacitance due to land pattern of crystal pads/pins, X
in
/X
out
pads and copper traces
connecting crystal and device pins.
Figure 32. RTC Recommended Component Configuration
[3]
Recommended Values
Y1 = 32.768 kHz (12.5 pF)
C
1
= 12 pF
C
2
= 69 pF
X
out
X
in
Y1
C2
C1
Note: The recommended values for C1 and C2 incl
board trace capacitance.
Note
3. For nvSRAM RTC design guidelines and best practices, refer to the application note, AN61546.