XR16M2550 Datasheet, PDF (37/47 Pages) Exar Corporation – HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO

REV. 1.0.2
XR16M2550
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO
AC ELECTRICAL CHARACTERISTICS
Unless otherwise noted: TA=-40^o to +85^oC, Vcc=1.62 - 3.63V, 70 pF load where applicable
SYMBOL
PARAMETER
XTAL1 UART Crystal Oscillator
ECLK External Clock
T_ECLK External Clock Time Period
T_AS Address Setup Time
T_AH Address Hold Time
T_CS Chip Select Width
T_RD IOR# Strobe Width
T_DY Read Cycle Delay
T_RDV Data Access Time
T_DD Data Disable Time
T_WR IOW# Strobe Width
T_DY Write Cycle Delay
T_DS Data Setup Time
T_DH Data Hold Time
T_WDO Delay From IOW# To Output
T_MOD Delay To Set Interrupt From MODEM Input
T_RSI Delay To Reset Interrupt From IOR#
T_SSI Delay From Stop To Set Interrupt
T_RRI Delay From IOR# To Reset Interrupt
T_SI Delay From Stop To Interrupt
T_INT Delay From Initial INT Reset To Transmit Start
T_WRI Delay From IOW# To Reset Interrupt
T_SSR Delay From Stop To Set RXRDY#
T_RR Delay From IOR# To Reset RXRDY#
T_WT Delay From IOW# To Set TXRDY#
T_SRT Delay From Center of Start To Reset TXRDY#
T_RST Reset Pulse Width
Bclk Baud Clock
LIMITS
1.8V ± 10%
MIN
MAX
LIMITS
2.5V ± 10%
MIN
MAX
LIMITS
3.3V ± 10%
MIN
MAX
24
24
24
32
50
64
15
10
7
0
0
0
0
0
0
65
40
35
65
40
35
65
40
35
60
35
30
25
25
25
65
40
35
65
40
35
20
10
10
3
3
3
50
50
50
50
50
50
50
50
50
1
1
1
45
45
45
45
45
45
8
24
8
24
8
24
45
45
45
1
1
1
45
45
45
45
45
45
8
8
8
40
40
40
16X or 8X or 4X of data rate
UNIT
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Bclk
ns
ns
Bclk
ns
Bclk
ns
ns
Bclk
ns
Hz
37