ST16C580
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
ns
ns
T3w
Oscillator/Clock frequency
Address strobe width
8
24
T
T
T
4w
5s
5h
35
5
5
25
0
5
Address setup time
Address hold time
T6s
Address setup time
5
0
ns
T
6h
Chip select hold time
0
0
ns
T7d
T7w
T7h
T8d
-IOR delay from chip select
-IOR strobe width
Chip select hold time from -IOR
-IOR delay from address
Read cycle delay
-IOR to -DDIS delay
Delay from -IOR to data
Data disable time
-IOW delay from chip select
-IOW strobe width
Chip select hold time from -IOW
-IOW delay from address
Write cycle delay
10
35
0
10
40
10
25
0
10
30
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note 1:
Note 1:
Note 1:
T9d
T11d
T12d
T12h
T13d
T13w
T13h
T14d
T15d
T16s
T16h
T17d
T18d
15
35
25
10
25
15
100 pF load
Note 1:
10
40
0
10
40
20
5
10
25
0
10
30
15
5
Note 1:
Data setup time
Data hold time
Delay from -IOW to output
Delay to set interrupt from MODEM
input
50
40
40
35
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
Note 1: Applicable only when -AS is tied low.
Rev.1.20
27
EXAR [ EXAR CORPORATION ]
