XR16L2450 Datasheet, PDF (22/30 Pages) Exar Corporation – 2.25V TO 5.5V DUART

XR16L2450
2.25V TO 5.5V DUART
xr
REV. 1.1.0
AC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA=-40^O TO +85^OC, VCC IS 2.25V TO 5.5V,
70 PF LOAD WHERE APPLICABLE
SYMBOL
PARAMETER
LIMITS
2.5
MIN
MAX
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
-
Crystal Frequency
8
16
24 MHz
CLK External Clock Low/High Time
31
25
21
ns
OSC External Clock Frequency
16
20
24 MHz
T_AS
T_AH
T_CS
T_RD
T_DY
T_RDV
T_DD
T_WR
T_DY
T_DS
T_DH
T_WDO
T_MOD
T_RSI
T_SSI
T_INT
Address Setup Time
Address Hold Time
Chip Select Width
IOR# Strobe Width
Read Cycle Delay
Data Access Time
Data Disable Time
IOW# Strobe Width
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 Initial INT Reset To Transmit
Start
10
10
10
10
10
10
150
75
50
150
75
50
150
75
50
175
100
0
45
0
30
0
150
75
50
150
75
50
25
20
15
15
10
10
150
75
150
75
150
75
1
1
8
24
8
24
8
ns
ns
ns
ns
ns
60
ns
30
ns
ns
ns
ns
ns
50
ns
50
ns
50
ns
1
Bclk
24 Bclk
T_WRI
T_RST
N
Delay From IOW# To Reset Interrupt
Reset Pulse Width
Baud Rate Divisor
150
75
50
ns
40
40
40
ns
1
2¹⁶-1
1
2¹⁶-1
1
2¹⁶-1
-
Bclk Baud Clock
16X of data rate
Hz
22