Rainbow Electronics ATR0621 - Manual (Page 17)

17
4890AS–GPS–09/05
ATR0621 [Preliminary]
4. Oscillator
Figure 4-1. Crystal Connection
32 kHz
Crystal
Oscillator
XT_IN
XT_OUT
ATR0621 internal
32.768 kHz clock RTC
32.768 kHz
50 ppm
max.
25 pF
max.
25 pF
5. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters Pin Symbol Min. Max. Unit
Operating Free Air Temperature Range –40 +85 °C
Storage Temperature –60 +150 °C
DC Supply Voltage VDD18 –0.3 +1.95 V
DC Supply Voltage VDDIO –0.3 +1.95 V
DC Supply Voltage VDD_USB –0.3 +3.6 V
DC Supply Voltage LDO_IN –0.3 +3.6 V
DC Supply Voltage LDOBAT_IN –0.3 +3.6 V
DC Supply Voltage VBAT –0.3 +3.6 V
DC Input Voltage
EM_DA0 to EM_DA15, P0,
P3 to P7, P10, P11, P15,
P28, P30, SIGHI, SIGLO,
CLK23, XT_IN, TMS, TCK,
TDI, NTRST, DBG_EN,
LDO_EN, NRESET
–0.3 +1.95 V
DC Input Voltage USB_DM, USB_DP –0.3 +3.6 V
DC Input Voltage
P1, P2, P8, P9, P12 to P14,
P16 to P27, P29, P30
–0.3 +5.0 V
Note: Minimum/maximum limits are at +25°C ambient temperature, unless otherwise specified