XR16C864IQ-F Datasheet, PDF (44/51 Pages) Exar Corporation – 2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO

XR16C864
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
AC ELECTRICAL CHARACTERISTICS
REV. 2.2.0
TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC IS 2.97 TO 5.5V
SYMBOL
PARAMETER
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
CONDITIONS
T_SSI
T_RRI
T_SI
T_INT
Delay From Stop To Set Interrupt
Delay From IOR# To Reset Interrupt
Delay From Stop To Interrupt
Delay From Initial INT Reset To Transmit Start
1
1 Bclk
40
40 ns 100 pF load
45
40 ns
8
24
8
24 Bclk
T_WRI Delay From IOW# To Reset Interrupt
45
40 ns
T_SSR Delay From Stop To Set RXRDY#
1
1 Bclk
T_RR Delay From IOR# To Reset RXRDY#
45
40 ns
T_WT Delay From IOW# To Set TXRDY#
45
40 ns
T_SRT
T_RST
N
Delay From Center of Start To Reset TXRDY#
Reset Pulse Width
Baud Rate Divisor
8
8 Bclk
40
40
ns
1
2¹⁶-1
1
2¹⁶-1 ^-
Bclk Baud Clock
16X of data rate
bps
FIGURE 13. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
44