XR16M2650 Datasheet, PDF (37/47 Pages) Exar Corporation – HIGH PERFORMANCE LOW VOLTAGE DUART WITH 32-BYTE FIFO

REV. 1.0.2
XR16M2650
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 32-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
LIMITS
1.8V ± 10%
MIN
MAX
LIMITS
2.5V ± 10%
MIN
MAX
LIMITS
3.3V ± 10%
MIN
MAX
UNIT
XTAL1 UART Crystal Oscillator
24
24
24 MHz
ECLK External Clock
32
50
64 MHz
T_ECLK External Clock Time Period
15
10
7
ns
T_AS Address Setup Time
0
0
0
ns
T_AH Address Hold Time
0
0
0
ns
T_CS Chip Select Width
65
40
35
ns
T_RD IOR# Strobe Width
65
40
35
ns
T_DY Read Cycle Delay
65
40
35
ns
T_RDV Data Access Time
60
35
30 ns
T_DD Data Disable Time
25
25
25 ns
T_WR IOW# Strobe Width
65
40
35
ns
T_DY Write Cycle Delay
65
40
35
ns
T_DS Data Setup Time
20
10
10
ns
T_DH Data Hold Time
3
3
3
ns
T_WDO Delay From IOW# To Output
0
0
0
ns
T_MOD Delay To Set Interrupt From MODEM Input
0
0
0
ns
T_RSI Delay To Reset Interrupt From IOR#
0
0
0
ns
T_SSI Delay From Stop To Set Interrupt
60
35
30 Bclk
T_RRI Delay From IOR# To Reset Interrupt
25
25
25 ns
T_SI Delay From Stop To Interrupt
20
10
10
ns
T_INT Delay From Initial INT Reset To Transmit Start 5
5
5
Bclk
T_WRI Delay From IOW# To Reset Interrupt
5
5
5
ns
T_SSR Delay From Stop To Set RXRDY#
65
40
35
Bclk
T_RR Delay From IOR# To Reset RXRDY#
65
40
35
ns
T_WT Delay From IOW# To Set TXRDY#
45
45
45 ns
T_SRT Delay From Center of Start To Reset TXRDY#
8
8
8 Bclk
T_RST Reset Pulse Width
40
40
40
ns
Bclk Baud Clock
16X or 8X or 4X of data rate
Hz
37