XR68C92_05 Datasheet, PDF (26/33 Pages) Exar Corporation – DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER

XR68C92/192
AC ELECTRICAL CHARACTERISTICS
T =0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
A
Symbol
Parameter
Limits
3.3
Min Max
Limits
5.0
Min Max
Units
Conditions
T1w,T2w
T3w
TAS
TAH
TRWS
TRWH
TDD
TDS
TDH
TDF
TCSL
TCSH
T_AKL
T_AKH
T
AKT
T9s
T9h
T10d
T11d
TR
N
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
17
17
ns
8
24 MHz
0
0
ns
0
0
ns
0
0
ns
0
0
ns
51
32 ns
20
10
ns
1
1
ns
30
20 ns
100
70
ns
100
70
ns
70
42 ns
45
27 ns
70
43 ns
0
0
ns
0
0
ns
110
110 ns
100
100 ns
2
2
clks*
1
2¹⁶-1
1
2¹⁶-1 N/A
* number of input clock (crystal or external clock) periods
Rev. 1.33
26