CY2291
Document #: 38-07189 Rev. *C
Page 4 of 12
Maximum Ratings
(Exceeding maximum ratings may shorten the useful life of the
device. User guidelines are not tested.)
Supply Voltage...............................................–0.5V to + 7.0V
DC Input Voltage ...........................................–0.5V to + 7.0V
Storage Temperature ................................. –65
°
C to +150
°
C
Max. Soldering Temperature (10 sec) ......................... 260
°
C
Junction Temperature .................................................. 150
°
C
Package Power Dissipation...................................... 750 mW
Static Discharge Voltage.............................................
≥
2000V
(per MIL-STD-883, Method 3015)
Operating Conditions
[5]
Parameter
Description
Part Numbers
Min.
Max.
Unit
V
DD
Supply Voltage, 5.0V operation
All
4.5
5.5
V
V
DD
Supply Voltage, 3.3V operation
All
3.0
3.6
V
V
BATT
Battery Backup Voltage
All
2.0
5.5
V
T
A
Commercial Operating Temperature, Ambient
CY2291/CY2291F
0
+70
°C
Industrial Operating Temperature, Ambient
CY2291I/CY2291FI
−
40
+85
°C
C
LOAD
Max. Load Capacitance 5.0V Operation
All
25
pF
C
LOAD
Max. Load Capacitance 3.3V Operation
All
15
pF
f
REF
External Reference Crystal
All
10.0
25.0
MHz
External Reference Clock
[6, 7, 8]
All
1
30
MHz
t
PU
Power up time for all VDDs to reach minimum specified voltage (power
ramps must be monotonic)
0.05
50
ms
Electrical Characteristics, Commercial 5.0V
Parameter
Description
Conditions
Min.
Typ.
Max.
Unit
V
OH
HIGH-Level Output Voltage I
OH
= 4.0 mA
2.4
V
V
OL
LOW-Level Output Voltage
I
OL
= 4.0 mA
0.4
V
V
OH–32
32.768-kHz HIGH-Level
Output Voltage
I
OH
= 0.5 mA
V
BATT
0.5
V
V
OL–32
32.768-kHz LOW-Level
Output Voltage
I
OL
= 0.5 mA
0.4
V
V
IH
HIGH-Level Input Voltage
[9]
Except crystal pins
2.0
V
V
IL
LOW-Level Input Voltage
[9]
Except crystal pins
0.8
V
I
IH
Input HIGH Current
V
IN
= V
DD
– 0.5V
<1
10
μ
A
I
IL
Input LOW Current
V
IN
= +0.5V
<1
10
μ
A
I
OZ
Output Leakage Current
Three-state outputs
250
μ
A
I
DD
V
DD
Supply Current
Commercial
[10]
V
DD
= V
DD
Max., 5V operation
75
100
mA
I
DDS
V
DD
Power Supply Current
in Shutdown Mode
[10]
Shutdown active,
excluding V
BATT
CY2291/CY2291F
10
50
μ
A
I
BATT
V
BATT
Power Supply Current V
BATT
= 3.0V
5
15
μ
A
Notes
5. Electrical parameters are guaranteed by design with these operating conditions, unless otherwise noted.
6. External input reference clock must have a duty cycle between 40% and 60%, measured at V
DD
/2.
7. Please refer to application note “Crystal Oscillator Topics” for information on AC-coupling the external input reference clock.
8. The oscillator circuit is optimized for a crystal reference and for external reference clocks up to 20 MHz. For external reference clocks above 20 MHz, it is recommended
that a 150
Ω
pull up resistor to V
DD
be connected to the Xout pin.
9. Xtal inputs have CMOS thresholds.
10. Load = Max., V
IN
= 0V or V
DD
, Typical (–104) configuration, CPUCLK = 66 MHz. Other configurations vary. Power can be approximated by the following formula
(multiply by 0.65 for 3V operation): I
DD
=10+0.06•(F
CPLL
+F
UPLL
+2•F
SPLL
)+0.27•(F
CLKA
+F
CLKB
+F
CLKC
+F
CLKD
+F
CPUCLK
+F
CLKF
+F
XBUF
).
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