XR16C2850
AC ELECTRICAL CHARACTERISTICS
TA=0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
Symbol
Parameter
Limits
3.3
Limits
5.0
Units Conditions
Min
Max
Min
Max
T1w,T2w Clock pulse duration
17
17
ns
MHz
ns
T3w
Oscillator/Clock frequency
Address setup time
8
24
T6s
5
0
T7d
T7w
T7h
T9d
-IOR delay from chip select
-IOR strobe width
Chip select hold time from -IOR
Read cycle delay
10
35
0
10
25
0
ns
ns
ns
ns
40
30
T12d
T12h
T13d
T13w
T13h
T15d
T16s
T16h
T17d
T18d
Delay from -IOR to data
Data disable time
-IOW delay from chip select
-IOW strobe width
Chip select hold time from -IOW
Write cycle delay
Data setup time
35
25
25
15
ns
ns
ns
ns
ns
ns
ns
ns
10
40
0
40
20
5
10
25
0
30
15
5
Data hold time
Delay from -IOW to output
Delay to set interrupt from MODEM
input
50
40
40
35
ns
ns
100 pF load
100 pF load
T19d
T20d
T21d
T22d
T23d
Delay to reset interrupt from -IOR
Delay from stop to set interrupt
Delay from -IOR to reset interrupt
Delay from stop to interrupt
Delay from initial INT reset to transmit
start
40
1
45
45
24
35
1
40
40
24
ns
Rclk
ns
ns
Rclk
100 pF load
100 pF load
8
8
T24d
T25d
T26d
T27d
T28d
TR
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 start to reset -TxRdy
Reset pulse width
45
1
45
45
8
40
1
40
40
8
ns
Rclk
ns
ns
Rclk
ns
40
1
40
1
N
Baud rate devisor
216-1
216-1
Rclk
Rev. 1.00P
29
EXAR [ EXAR CORPORATION ]
