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ST68C554 数据表(PDF) 25 Page - Exar Corporation

部件名 ST68C554
功能描述  QUAD UART WITH 16-BYTE FIFOS
PDF  40 Pages
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制造商  EXAR [Exar Corporation]
网页  http://www.exar.com
标志 EXAR - Exar Corporation

ST68C554 数据表(HTML) 25 Page - Exar Corporation

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ST16C554/554D/68C554
25
Rev. 3.10
Symbol
Parameter
Limits
Limits
Units
Conditions
3.3
5.0
Min
Max
Min
Max
AC ELECTRICAL CHARACTERISTICS
T
A=0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
T1w,T2w Clock pulse duration
17
17
ns
T3w
Oscillator/Clock frequency
8
24
MHz
T6s
Address setup time
5
0
ns
T7d
-IOR delay from chip select
10
10
ns
T7w
-IOR strobe width
35
25
ns
T7h
Chip select hold time from -IOR
0
0
ns
T9d
Read cycle delay
40
30
ns
T12d
Delay from -IOR to data
35
25
ns
T12h
Data disable time
25
35
15
ns
T13d
-IOW delay from chip select
10
10
ns
T13w
-IOW strobe width
35
25
ns
T13h
Chip select hold time from -IOW
0
0
ns
T15d
Write cycle delay
40
30
ns
T16s
Data setup time
20
15
ns
T16h
Data hold time
5
5
ns
T17d
Delay from -IOW to output
50
40
ns
100 pF load
T18d
Delay to set interrupt from MODEM
40
35
ns
100 pF load
input
T19d
Delay to reset interrupt from -IOR
40
35
ns
100 pF load
T20d
Delay from stop to set interrupt
1
1
Rclk
T21d
Delay from -IOR to reset interrupt
45
40
ns
100 pF load
T22d
Delay from stop to interrupt
45
40
ns
T23d
Delay from initial INT reset to transmit
8
24
8
24
Rclk
start
T24d
Delay from -IOW to reset interrupt
45
40
ns
T25d
Delay from stop to set -RxRdy
1
1
Rclk
T26d
Delay from -IOR to reset -RxRdy
45
40
ns
T27d
Delay from -IOW to set -TxRdy
45
40
ns
T28d
Delay from start to reset -TxRdy
8
8
Rclk
T30s
Address setup time
10
10
ns
T30w
Chip select strobe width
40
40
ns
T30h
Address hold time
15
15
ns
T30d
Read cycle delay
70
70
ns
T31d
Delay from -CS to data
15
15
ns
T31h
Data disable time
15
ns
T32s
Write strobe setup time
10
10
ns
T32h
Write strobe hold time
10
10
ns
T32d
Write cycle delay
70
70
ns



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