xr68c92 Exar Corporation, xr68c92 Datasheet - Page 26

• Manufacturer Part Number: xr68c92
• Description: Xr68c92 -dual Uart With Eight Bytes Transmit And Receive Fifo
• Manufacturer: Exar Corporation

XR68C92/192
T
AC ELECTRICAL CHARACTERISTICS
A
Symbol
=0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
Rev. 1.33
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
N
* number of input clock (crystal or external clock) periods
1w,
AH
DD
DS
DH
DF
CSL
CSH
AKL
AKH
AKT
9s
10d
11d
3w
AS
RWS
RWH
9h
R
T
2w
Clock pulse duration
Oscillator/Clock frequency
Address Valid to -CS Low
-CS High to Address Invalid
R/-W Setup Time to -CS Low
R/-W Hold Time from -CS High
-CS/-IACK Low to Data Valid (Read)
Data Valid to -CS High (Write)
-CS High to Data Invalid (Write)
-CS/-IACK High to Data Hi-Z (Read)
-CS Low Pulse Width
-CS High Pulse Width
-CS/-IACK Low to -DACK Low
-CS/-IACK High to -DACK High
-CS/-IACK High to -DACK Hi-Z
Port input setup time
Port input hold time
Delay from R/-W to output
Delay to reset interrupt from -CS
Reset pulse width
Baud rate divisor
Parameter
26
Min
100
100
17
20
0
0
0
0
1
0
0
2
1
Limits
3.3
Max
2
110
100
51
30
70
45
70
16
8
-1
Min
17
10
70
70
0
0
0
0
1
0
0
2
1
Limits
5.0
Max
2
110
100
24
32
20
42
27
43
16
-1
Units
clks*
MHz
N/A
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Conditions