Datasheet

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SLLS037C − MARCH 1988 − REVISED JANUARY 2006
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
modem control switching characteristics over recommended ranges of supply voltage and
operating free-air temperature
PARAMETER FIGURE TEST CONDITIONS MIN MAX UNIT
t
d20
Delay time, WR MCR to output 6 C
L
= 100 pF 100 ns
t
d21
Delay time, modem interrupt to set interrupt 6 C
L
= 100 pF 170 ns
t
d22
Delay time, RD MSR to reset interrupt 6 C
L
= 100 pF 140 ns
PARAMETER MEASUREMENT INFORMATION
(N-2) XTAL1
Cycles
2XTAL1
Cycles
t
w1
t
w2
2 V
0.8 V
N
t
d2
t
d1
t
d1
t
d2
t
w3
t
w4
RCLK
(9 MHz Max)
XTAL1
BAUDOUT
(1/1)
BAUDOUT
(1/2)
BAUDOUT
(1/3)
BAUDOUT
(1/N)
(N>3)
90%
90%
10%
Figure 1. Baud Generator Timing Waveforms