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CY2291
Document #: 38-07189 Rev. *C Page 10 of 12
Switching Waveforms
SELECT
CPU
OLD SELECT NEW SELECT STABLE
F
old
F
new
t
8
&t
10
Figure 5. CPU Frequency Change
Test Circuit
Ordering Information
Ordering Code Package Type Operating Range Operating Voltage
CY2291FI
[16]
20-Pin SOIC Industrial 3.3V or 5.0V
Pb-Free
CY2291SXC–XXX 20-Pin SOIC Commercial 5.0V
CY2291SXC–XXXT 20-Pin SOIC – Tape and Reel Commercial 5.0V
CY2291SXL–XXX 20-Pin SOIC Commercial 3.3V
CY2291SXL–XXXT 20-Pin SOIC – Tape and Reel Commercial 3.3V
CY2291FX 20-Pin SOIC Commercial 3.3V or 5.0V
CY2291FXT 20-Pin SOIC – Tape and Reel Commercial 3.3V or 5.0V
Package Characteristics
Package θ
JA
(C/W) θ
JC
(C/W) Transistor Count
20-pin SOIC 125 25 9271
0.1 μF
V
DD
0.1 μF
V
DD
CLK out
C
LOAD
GND
OUTPUTS
Note
16.Not recommended for new designs.
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