xr20m1280 Exar Corporation, xr20m1280 Datasheet - Page 51

• Manufacturer Part Number: xr20m1280
• Description: I2c/spi Uart With 128-byte Fifo And Integrated Level Shifters
• Manufacturer: Exar Corporation

REV. P1.1.1
AC ELECTRICAL CHARACTERISTICS
TA = -40
F
IGURE
S
XTAL1
T
ECLK
YMBOL
ECLK
EXTERNAL
CLOCK
21. C
O
TO
UART Crystal Frequency
External Clock Frequency
External Clock Time Period
+85
LOCK
O
C, VCC_
T
IMING
P
ARAMETER
XXXX IS
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
CLK
1.62
TO
OSC
3.63V, 70
PRELIMINARY
M
CLK
12
1.8V
IN
L
P
51
F
IMITS
± 10%
LOAD WHERE APPLICABLE
M
24
40
AX
M
2.5V
7
IN
L
IMITS
± 10%
M
24
64
AX
M
IN
3.3V
5
L
IMITS
XR20M1280
± 10%
M
24
96
AX
U
MHz
MHz
ns
NIT