XR16L2550 Datasheet, PDF (36/45 Pages) Exar Corporation – LOW VOLTAGE DUART WITH 16-BYTE FIFO

XR16L2550
LOW VOLTAGE DUART WITH 16-BYTE FIFO
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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
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
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_WDO
Data Hold Time
Delay From IOW# To Output
15
10
10
ns
150
75
50
ns
T_MOD Delay To Set Interrupt From MODEM Input
150
75
50
ns
T_RSI Delay To Reset Interrupt From IOR#
150
75
50
ns
T_SSI Delay From Stop To Set Interrupt
1
1
1
Bclk
T_RRI Delay From IOR# To Reset Interrupt
150
75
50
ns
T_SI Delay From Stop To Interrupt
150
75
50
ns
T_INT Delay From Initial INT Reset To Transmit Start 8
24
8
24
8
24 Bclk
T_WRI Delay From IOW# To Reset Interrupt
150
75
50
ns
T_SSR Delay From Stop To Set RXRDY#
1
1
1
Bclk
T_RR Delay From IOR# To Reset RXRDY#
150
75
50
ns
T_WT Delay From IOW# To Set TXRDY#
150
75
50
ns
T_SRT Delay From Center of Start To Reset TXRDY#
8
8
8
Bclk
T_RST Reset Pulse Width
40
40
40
ns
36