XR20M1172G28-0B Datasheet, PDF (44/55 Pages) Exar Corporation – TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO

XR20M1172
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
REV. 1.2.0
AC ELECTRICAL CHARACTERISTICS - UART CLOCK
Unless otherwise noted: TA=-40^o to +85^oC, Vcc=1.62 - 3.63V
SYMBOL
PARAMETER
XTAL1
ECLK
T_ECLK
UART Crystal Oscillator
UART External Clock
External Clock Time Period
LIMITS
1.8V ± 5%
MIN
MAX
LIMITS
1.8V ± 10%
MIN
MAX
LIMITS
2.5V ± 10%
MIN
MAX
LIMITS
3.3V ± 10%
MIN
MAX
24
24
24
24
32
24
50
64
1/ECLK
1/ECLK
1/ECLK
1/ECLK
UNIT
MHz
MHz
ns
FIGURE 20. CLOCK TIMING
T_ECLK
External
Clock
VIHCK
VILCK
44