XR16C854 Datasheet, PDF (36/51 Pages) Exar Corporation – QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO

XR16C854
AC ELECTRICAL CHARACTERISTICS
T_A=0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
Symbol
Parameter
T1w,T2w
T3w
T6s
T7d
T7w
T7h
T9d
T12d
T12h
T13d
T13w
T13h
T15d
T16s
T16h
T17d
T18d
T19d
T20d
T21d
T22d
T23d
T24d
T25d
T26d
T27d
T28d
T30s
T30w
T30h
T30d
T31d
T31h
T32s
T32h
T32d
T33s
Clock pulse duration
Oscillator/Clock frequency
Address setup time
-IOR delay from chip select
-IOR strobe width
Chip select hold time from -IOR
Read cycle delay
Delay from -IOR to data
Data disable time
-IOW delay from chip select
-IOW strobe width
Chip select hold time from -IOW
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 start to reset -TxRdy
Address setup time
Chip select strobe width
Address hold time
Read cycle delay
Delay from -CS to data
Data disable time
Write strobe setup time
Write strobe hold time
Write cycle delay
Data setup time
Limits
3.3
Min Max
20
8
10
10
50
5
50
35
35
10
40
0
50
20
50
50
50
50
1Rclk
200
100
8
24
175
1
175
175
8
10
40
15
70
15
10
10
70
20
Limits
5.0
Min Max
20
24
5
10
25
5
50
25
35 35
10
40
0
50
15
35
50
35
Units
ns
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Conditions
100 pF load
100 pF load
35 ns 100 pF load
1Rclk Rclk
200 ns 100 pF load
100 ns
8
24 Rclk
175 ns
1 Rclk
175 ns
175 ns
8 Rclk
10
ns
40
ns
15
ns
70
ns
15
ns
15
ns
10
ns
10
ns
70
ns
15
ns
Rev. 1.00P
36