XR20M1280L32-0B Datasheet, PDF (51/63 Pages) Exar Corporation – I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS

XR20M1280
REV. 1.0.0
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
DC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA = -40^O TO +85^OC, VCC_XXXX IS 1.62 TO 3.63V
SYMBOL
PARAMETER
C_IN
I_CC
I_SLEEP
Input Pin Capacitance
Power Supply Current
Sleep Current
LIMITS
1.8V
MIN
MAX
5
2
5
LIMITS
2.5V
MIN
MAX
5
3
10
LIMITS
3.3V
MIN
MAX
5
UNITS
pF
CONDITIONS
4
mA Ext Clk = 5MHz
20 uA See Test 1
Test 1: All inputs should remain steady at VCC or GND to minimize Sleep current. RX input must idle at HIGH while asleep.
AC ELECTRICAL CHARACTERISTICS
TA = -40^O TO +85^OC, VCC_XXXX IS 1.62 TO 3.63V, 70 PF LOAD WHERE APPLICABLE
SYMBOL
PARAMETER
XTAL1
ECLK
UART Crystal Frequency
External Clock Frequency
LIMITS
1.8V ± 10%
MIN
MAX
24
40
LIMITS
2.5V ± 10%
MIN
MAX
24
64
T_ECLK External Clock Time Period
12
7
LIMITS
3.3V ± 10%
MIN
MAX
24
96
5
UNIT
MHz
MHz
ns
FIGURE 21. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
51