XR16L651 Datasheet, PDF (44/56 Pages) Exar Corporation – 2.25V TO 5.5V UART WITH 32-BYTE FIFO

XR16L651
2.25V TO 5.5V UART WITH 32-BYTE FIFO
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REV. 1.3.0
AC ELECTRICAL CHARACTERISTICS
TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC IS 2.90V TO 5.5V, 70 PF LOAD
WHERE APPLICABLE
SYMBOL
PARAMETER
T_SI
T_INT
T_WRI
T_SSR
T_RR
T_WT
T_SRT
T_RST
N
Delay From Stop To Interrupt
Delay From Initial INT Reset To Transmit Start
Delay From IOW# To Reset Interrupt
Delay From Stop To Set RXRDY#
Delay From IOR# To Reset RXRDY#
Delay From IOW# To Set TXRDY#
Delay From Center of Start To Reset TXRDY#
Reset Pulse Width
Baud Rate Divisor
LIMITS
2.5
MIN
MAX
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
50
45
40 ns
8
24
8
24
8
24 Bclk
50
45
40 ns
1
1
1 Bclk
50
45
40 ns
50
45
40 ns
8
8
8 Bclk
40
40
40
ns
1
2¹⁶-1
1
2¹⁶-1
1
2¹⁶-1 ^-
Bclk Baud Clock
16X of data rate
Hz
FIGURE 16. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
44