ST16C550 Exar Corporation, ST16C550 Datasheet - Page 21

• Manufacturer Part Number: ST16C550
• Description: UART WITH 16-BYTE FIFO
• Manufacturer: Exar Corporation

AC ELECTRICAL CHARACTERISTICS
T
Note 1: Applicable only when -AS is tied low.
A
Symbol
=0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
Rev. 4.30
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
N
1w
3w
4w
6s
6s'
6h
7d
7w
7h
7h'
8d
13d
14d
5s
5h
9d
11d
12d
12h
13w
13h
15d
16s
16h
17d
18d
19d
20d
21d
22d
23d
24d
25d
26d
27d
28d
R
,T
2w
Clock pulse duration
Oscillator/Clock frequency
Address strobe width
Address setup time
Address hold time
Address setup time
Address setup time
Chip select hold time
-IOR delay from chip select
-IOR strobe width
Chip select hold time from -IOR
Address hold time
-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
Data setup time
Data hold time
Delay from -IOW to output
Delay to set interrupt from MODEM
input
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
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
Baud rate devisor
Parameter
21
Min
17
35
10
10
35
10
40
10
40
10
40
20
40
0
5
5
5
0
0
5
5
1
8
Limits
3.3
Max
2
50
40
40
45
45
16
15
35
25
45
24
45
45
16
1
1
8
-1
Min
30
25
30
15
40
17
25
10
25
10
10
10
0
5
0
5
0
0
5
0
5
8
1
Limits
5.0
Max
2
24
10
25
15
40
35
35
40
40
40
40
40
24
16
1
1
8
-1
ST16C550
Units
MHz
Rclk
Rclk
Rclk
Rclk
Rclk
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
100 pF load
100 pF load
100 pF load
100 pF load
see Note 1
see Note 1
100 pF load
Conditions