XR16M781IL32-F Datasheet, PDF (45/52 Pages) Exar Corporation – 1.62V TO 3.63V UART WITH 64-BYTE FIFO AND VLIO INTERFACE

XR16M781
REV. 1.0.1
1.62V TO 3.63V UART WITH 64-BYTE FIFO AND VLIO INTERFACE
AC ELECTRICAL CHARACTERISTICS
TA = -40^O TO +85^OC, VCC IS 1.62 TO 3.6V, 25 PF LOAD WHERE APPLICABLE
SYMBOL
PARAMETER
LIMITS
1.8V ± 10%
MIN
MAX
LIMITS
2.5V ± 10%
MIN
MAX
LIMITS
3.3V ± 10%
MIN
MAX
UNIT
T_RR
Delay From IOR# To Reset RXRDY#
45
45
45
ns
T_WT Delay From IOW# To Set TXRDY#
45
45
45
ns
T_SRT Delay From Center of Start To Reset
8
8
8
Bclk
TXRDY#
T_RST
Bclk
Reset Pulse Width
Baud Clock
40
40
40
ns
16X or 8X or 4X of data rate
Hz
FIGURE 15. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
FIGURE 16. MODEM INPUT/OUTPUT TIMING
IO W #
IO W
RTS#
DTR#
A c tiv e
C h an ge o f state
T _{W DO}
C h a n g e o f sta te
CD#
CTS#
DSR#
IN T
IO R #
R I#
T _MOD
C h a n g e o f sta te
A c tive
A c tiv e
C ha n ge o f state
T _RSI
T _MOD
A c tiv e
A c tiv e
A c tiv e
A c tive
T_MOD
C ha n ge o f state
45