XR16C850 Datasheet, PDF (37/55 Pages) Exar Corporation – UART with 128-byte FIFO’s FIFO Counters and Half-duplex Control

XR16C850
AC ELECTRICAL CHARACTERISTICS
T_A=0° - 70° C ( -40° - +85° C for IP, IJ, IQ packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
Symbol
Parameter
Limits
3.3
Min Max
Limits
5.0
Min Max
Units
Conditions
T_1w,T_2w
T_3w
T4w
T5s
T5h
T
6s
T6h
T_7d
T_7w
T_7h
T8d
T_9d
T_10d
T
11d
T_12d
T_12h
T
13d
T_13w
T_13h
T_14d
T_15d
T
16s
T_16h
T_17d
T
18d
T_19d
T
20d
T_21d
T_22d
T_23d
T
24d
T_25d
T_26d
T
27d
T_28d
T_R
N
Clock pulse duration
Oscillator/Clock frequency
Address strobe width
Address setup time
Address hold time
Address setup time
Chip select hold time
-IOR delay from chip select
-IOR strobe width
Chip select hold time from -IOR
IOR delay from chip select
Read cycle delay
CSOUT delay from chip select
-IOR to -DDIS delay
Delay from -IOR to data
Data disable time
-IOW delay from chip select
-IOW strobe width
Chip select hold time from -IOW
-IOW delay from address
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
Reset pulse width
Baud rate devisor
Note 1: Applicable only when -AS is tied low.
20
20
ns
8
24 MHz
50
25
ns
15
10
ns
10
5
ns
10
5
ns
0
0
ns
10
10
ns Note 1:
50
25
ns
5
5
ns Note 1:
8
8
ns
50
50
ns
15
10 ns 100 pF load
25
20 ns 100 pF load
35
25
ns
25
15
ns
10
10
ns Note 1:
40
40
ns
0
0
ns
10
10
ns Note 1:
50
50
ns
20
15
ns
50
35
ns
50
50 ns 100 pF load
50
35 ns 100 pF load
50
35 ns 100 pF load
1
1 Rclk
200
200 ns 100 pF load
100
100 ns
8
24
8
24 Rclk
175
175 ns
1
1 Rclk
175
175 ns
175
175 ns
8
8 Rclk
40
40
ns
1
2¹⁶-1
1
2¹⁶-1 Rclk
Rev. 1.20
37