Cypress CY2048WAF - Manual (Page 4)

CY2048WAF
Document #: 38-07738 Rev. *A Page 4 of 7
Notes:
2. T
PJ2
measured using DTS-2075, # of events set to 10, 000.
AC Electrical Specifications [1]
over the operating range, except as noted
Parameter
[1]
Description Condition Min. Typ. Max. Unit
F
OUT
Output Frequency 0.625 – 48 MHz
DC Output Duty Cycle XTAL Buffered or Divided 45 50 55 %
T
R
Rise Time Output Clock Rise Time, Measured from 20% to
80% of V
DD
, C
OUT
= 15 pF.
2.5 ns
T
F
Fall Time Output Clock Fall Time, Measured from 80% to
20% of V
DD
, C
OUT
= 15 pF.
2.5 ns
t
PJ1
RMS Period Jitter XIN = 10–48 MHz. Measured at V
DD
/2 – 4 15 ps
t
PJ2
[2] Peak-to-peak Period Jitter XIN = 10–48 MHz. Measured at V
DD
/2 – 30 80 ps
DL Crystal drive level 48-MHz crystal, C
L
= 7 pF, C
0
= 2 pF,
R1 = 10 Ohms, Temp. = 25°C, V
DD
= 3.6V
350–400
µW
–R Negative Resistance Measured at 48 MHz, C
L
= 10 pF, C
0
= 5 pF – – –150
Ω
F
DRIFT
Output Frequency Drift 3.0V ± 10%, 3.3V ± 10% for Temp. = 25°C –2 – 2 ppm
Phase Noise, Temp = 25°C, V
DD
= 3.3V,
F
NOM
= 10MHz, X
CAP
= 7F (Hex)
Offset dBc/Hz (Typ)
10 Hz –90
100 Hz –115
1 kHz –130
10 kHz –140
100 kHz –140
1 MHz –140
Crystal Oscillator Tuning Capacitor Values
Capacitor Bit Capacitance (pF) per Side
C
7
5.000
C
6
2.500
C
5
1.250
C
4
0.625
C
3
0.313
C
2
0.156
C
1
0.078
C
0
0.039
XOUT
C0 C1 C2 C3 C4 C5 C6 C7 C7 C6 C5 C4 C3 C2 C1 C0
XIN
C XIN
C XOUT
Figure 1. Programmable Load Capacitance
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