XR16C2852IJ-F Datasheet, PDF (42/51 Pages) Exar Corporation – 2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS

XR16C2852
2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS
xr
REV. 2.1.1
AC ELECTRICAL CHARACTERISTICS
TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC IS 2.97V TO 5.5V, 70 PF LOAD
WHERE APPLICABLE
SYMBOL
PARAMETER
T_SRT
T_RST
N
Bclk
Delay From Center of Start To Reset TXRDY#
Reset Pulse Width
Baud Rate Divisor
Baud Clock
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
8
8
Bclk
40
40
ns
1
2¹⁶-1
1
2¹⁶-1
-
16X of data rate
Hz
CONDITIONS
FIGURE 16. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
FIGURE 17. MODEM INPUT/OUTPUT TIMING FOR CHANNELS A & B
IOW #
RTS#
DTR#
Active
Change of state
T _{W DO}
Change of state
CD#
CTS#
DSR#
INT
IOR#
RI#
T_MOD
Change of state
Change of state
Active
Active
T_MOD
T_RSI
Active
Active
Active
Active
T_MOD
Change of state
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