XR16L2752 Datasheet, PDF (41/49 Pages) Exar Corporation – 2.25V TO 5.5V DUART WITH 64-BYTE FIFO

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REV. 1.2.1
XR16L2752
2.25V TO 5.5V DUART WITH 64-BYTE FIFO
AC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC=2.25-5.5V,
70 PF LOAD WHERE APPLICABLE
SYMBOL
PARAMETER
LIMITS
2.5
MIN
MAX
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
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
FIGURE 15. MODEM INPUT/OUTPUT TIMING FOR CHANNELS A & B
IO W #
RTS#
DTR#
A c tive
C hange of state
T_{W DO}
C hange of state
CD#
CTS#
DSR#
IN T
IO R #
R I#
T_MOD
C hange of state
A c tive
A c tive
C hange of state
T _RSI
T _MOD
A c tive
A ctive
A c tive
A ctive
T_MOD
C hange of state
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