XR16C2850 Datasheet, PDF (32/43 Pages) Exar Corporation – 3.3V AND 5V DUART WITH 128-BYTE FIFO

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3.3V AND 5V DUART WITH 128-BYTE FIFO
XR16C2850
REV. 2.0.0
AC ELECTRICAL CHARACTERISTICS
TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC IS 3.3 OR 5.0V ±10%
SYMBOL
PARAMETER
LIMITS
3.3V
MIN
MAX
LIMITS
5.0V
MIN
MAX
UNIT
CONDITIONS
CLK Clock Pulse Duration
17
17
ns
OSC Oscillator Frequency
8
24
MHz
OSC
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_RRI
T_SI
T_INT
T_WRI
T_SSR
T_RR
T_WT
T_SRT
T_RST
N
External Clock Frequency
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 IOR# To Reset Interrupt
Delay From Stop To Interrupt
Delay From Initial INT Reset To Transmit Start
Delay From IOW# To Reset Interrupt
Delay From Stop To Set RXRDY#
Delay From IOR# To Reset RXRDY#
Delay From IOW# To Set TXRDY#
Delay From Center of Start To Reset TXRDY#
Reset Pulse Width
Baud Rate Divisor
33
50
MHz
5
0
ns
10
5
ns
66
50
ns
35
25
ns
40
30
ns
35
25
ns
0
25
0
15
ns
40
25
ns
40
30
ns
20
15
ns
5
5
ns
50
40
ns 100 pF load
40
35
ns 100 pF load
40
35
ns 100 pF load
1
1
Bclk
45
40
ns 100 pF load
45
40
ns
8
24
8
24
Bclk
45
40
ns
1
1
Bclk
45
40
ns
45
40
ns
8
8
Bclk
40
40
ns
1
2¹⁶-1
1
2¹⁶-1
-
Bclk Baud Clock
16X or 8X of data rate
bps
32