ST16C450 Exar Corporation, ST16C450 Datasheet - Page 18

• Manufacturer Part Number: ST16C450
• Description: UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART)
• Manufacturer: Exar Corporation

ST16C450
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. 4.20
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
23d
5s
5h
6s
6h
7d
7w
7h
8d
9d
10d
11d
12d
12h
13d
13w
13h
14d
15d
16s
16h
17d
18d
19d
20d
21d
22d
24d
R
,T
2w
Clock pulse duration
Oscillator/Clock frequency
Address strobe width
Address setup time
Address hold time
Address setup time
Chip select hold time
-IOR delay from chip select
-IOR strobe width
Chip select hold time from -IOR
-IOR delay from address
Read cycle delay
CSOUT delay from chip select
-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
Reset pulse width
Baud rate devisor
Parameter
18
Min
17
35
10
35
10
40
10
40
10
40
20
40
5
5
5
0
0
0
5
1
8
Limits
3.3
2
Max
15
15
35
25
50
40
40
45
45
45
24
16
8
1
-1
Min
10
10
10
17
25
10
25
30
25
30
15
40
0
5
0
0
0
0
5
8
1
Limits
5.0
2
Max
24
10
10
25
15
40
35
35
40
40
24
40
16
1
-1
Units
MHz
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
Note 1:
Note 1:
Note 1:
100 pF load
100 pF load
Note 1:
Note 1:
100 pF load
100 pF load
100 pF load
100 pF load
Conditions