XR16L2551 Datasheet, PDF (38/48 Pages) Exar Corporation – LOW VOLTAGE DUART WITH POWERSAVE

XR16L2551
LOW VOLTAGE DUART WITH POWERSAVE
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REV. 1.0.0
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
16
20
24 MHz
CLK External Clock Low/High Time
31
17
10
ns
OSC External Clock Frequency
16
30
50 MHz
T_AS
T_AH
T_CS
T_RD
T_DY
T_RDV
T_DD
T_WR
T_DY
T_DS
Address Setup Time (16 Mode)
Address Hold Time (16 Mode)
Chip Select Width (16 Mode)
IOR# Strobe Width (16 Mode)
Read Cycle Delay (16 Mode)
Data Access Time (16 Mode)
Data Disable Time (16 Mode)
IOW# Strobe Width (16 Mode)
Write Cycle Delay (16 Mode)
Data Setup Time (16 Mode)
10
10
10
ns
10
10
10
ns
150
75
50
ns
150
75
50
ns
150
75
50
ns
125
80
50 ns
0
45
0
30
0
30 ns
150
75
50
ns
150
75
50
ns
25
20
15
ns
T_DH
T_ADS
T_ADH
T_RWS
T_RDA
T_RDH
T_WDS
T_WDH
T_RWH
T_CSL
T_CSD
Data Hold Time (16 Mode)
Address Setup (68 Mode)
Address Hold (68 Mode)
R/W# Setup to CS# (68 Mode)
Read Data Access (68 mode)
Read Data Disable (68 mode)
Write Data Setup (68 mode)
Write Data Hold (68 Mode)
R/W# Hold (68 Mode)
CS# Width (68 Mode)
CS# Cycle Delay (68 Mode)
15
10
10
ns
10
10
10
ns
10
10
10
ns
10
10
10
ns
175
100
60
ns
45
30
30 _ns
25
20
15
ns
15
10
10
ns
15
10
150
75
150
75
10
ns
50
ns
50
ns
T_WDO
T_MOD
T_RSI
Delay From IOW# To Output
Delay To Set Interrupt From MODEM Input
Delay To Reset Interrupt From IOR#
150
75
150
75
150
75
50 ns
50 ns
50 ns
38