XR16L2750 Datasheet, PDF (39/49 Pages) Exar Corporation – 2.25V TO 5.5V DUART WITH 64-BYTE FIFO

XR16L2750
2.25V TO 5.5V DUART WITH 64-BYTE FIFO
REV. 1.0.0
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AC ELECTRICAL CHARACTERISTICS
TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC IS 2.25 TO 5.5V
SYMBOL
PARAMETER
LIMITS
2.5
MIN
MAX
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
CONDITIONS
T_RR Delay From IOR# To Reset
RXRDY#
50
45
40
ns
T_WT Delay From IOW# To Set
TXRDY#
50
45
40
ns
T_SRT Delay From Center of Start To
8
8
8
Bclk
Reset TXRDY#
T_RST
N
Reset Pulse Width
Baud Rate Divisor
40
40
40
ns
1
2¹⁶-1
1
2¹⁶-1
1
2¹⁶-1
-
Bclk Baud Clock
16X or 8X of data rate
Hz
FIGURE 14. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
39