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
VDD Supply Voltage, 5.0V operation All 4.5 5.5 V
VDD Supply Voltage, 3.3V operation All 3.0 3.6 V
VBATT Battery Backup Voltage All 2.0 5 .5 V
TACommercial Operating Temperature, Ambient CY2291/CY2291F 0 +70 °C
Industrial Operating Temperature, Ambient CY2291I/CY2291FI −40 +85 °C
CLOAD Max. Load Capacitance 5.0V Operation All 25 pF
CLOAD Max. Load Capacitance 3.3V Operation All 15 pF
fREF External Reference Crystal All 10.0 25.0 MHz
External Reference Clock[6, 7, 8] All 1 30 MHz
tPU 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
VOH HIGH-Level Output Voltage IOH = 4.0 mA 2.4 V
VOL LOW-Level Output Voltage IOL = 4.0 mA 0.4 V
VOH–32 32.768-kHz HIGH-Level
Output Voltage IOH = 0.5 mA VBATT
0.5 V
VOL–32 32.768-kHz LOW-Level
Output Voltage IOL = 0.5 mA 0.4 V
VIH HIGH-Level Input Voltage[9] Except crystal pins 2.0 V
VIL LOW-Level Input Voltage[9] Except crystal pins 0.8 V
IIH Input HIGH Current VIN = VDD – 0.5V <1 10 μA
IIL Input LOW Current VIN = +0.5V <1 10 μA
IOZ Output Leakage Current Three-state outputs 250 μA
IDD VDD Supply Current
Commercial[10] VDD = VDD Max., 5V operation 75 100 mA
IDDS VDD Power Supply Current
in Shutdown Mode[10] Shutdown active,
excluding VBATT
CY2291/CY2291F 10 50 μA
IBATT VBATT Power Supply CurrentVBATT = 3.0V 5 15 μA
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 VDD/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 150Ω pull up resistor to VDD be connected to the Xout pin.
9. Xtal inputs have CMOS thresholds.
10.Load = Max., VIN = 0V or VDD, Typical (–104) configuration, CPUCLK = 66 MHz. Other configurations vary. Power can be approximated by the following formula
(multiply by 0.65 for 3V operation): IDD=10+0.06•(FCPLL+FUPLL+2•FSPLL)+0.27•(FCLKA+FCLKB+FCLKC+FCLKD+FCPUCLK+FCLKF+FXBUF).
[+] Feedback