XR16M780 Datasheet, PDF (47/58 Pages) Exar Corporation – 1.62V TO 3.63V HIGH PERFORMANCE UART WITH 64-BYTE FIFO

XR16M780
REV. 1.0.0
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 64-BYTE FIFO
AC ELECTRICAL CHARACTERISTICS
TA = -40^O TO +85^OC, VCC IS 1.62 TO 3.6V, 70 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_MOD Delay To Set Interrupt From MODEM
50
50
50
ns
Input
T_RSI Delay To Reset Interrupt From IOR#
50
50
50
ns
T_SSI Delay From Stop To Set Interrupt
1
1
1
Bclk
T_RRI Delay From IOR# To Reset Interrupt
45
45
45
ns
T_SI
Delay From Start To Interrupt
45
45
45
ns
T_INT Delay From Initial INT Reset To
Transmit Start
8
24
8
24
8
24 Bclk
T_WRI Delay From IOW# To Reset Interrupt
45
45
45
ns
T_SSR Delay From Stop To Set RXRDY#
1
1
1
Bclk
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 16. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
47