XR16C872 Ver la hoja de datos (PDF) - Exar Corporation
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XR16C872 Datasheet PDF : 60 Pages
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XR16C872
Preliminary
HOST INTERFACE AND UART AC ELECTRICAL CHARACTERISTICS
T = 0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise
A
specified.
Symbol Parameter
Limits
3.3
Min Max
T1CW
T2FQ
T3AS
T4AH
T5RD
T6DY
T7DA
T8DH
T9WR
T10DS
T11DH
T12D
T13D
T14D
T15D
T16D
T17D
T18D
T19D
TRST
N
Clock pulse duration
20
Oscillator/Clock frequency
Address setup time
10
Address hold time
10
IOR# strobe width
50
Read/Write cycle delay
50
Delay from IOR# to data
35
Data disable time
25
IOW# strobe width
40
Data setup time
20
Data hold time
50
Delay from IOW# to modem output
Delay from modem input to MSR interrupt
Delay from IOR# to reset MSR interrupt
Delay from stop bit to set RX interrupt
Delay from IOR# to reset interrupt
Delay from stop bit to set TX interrupt
Delay from INT reset to transmit start
8
Delay from IOW# to reset interrupt
Reset pulse width
40
Baud rate divisor
1
tbd
50
50
50
1
200
100
24
175
216-1
Limits
5.0
Min Max
Units
Conditions
20
ns
24 MHz
5
ns
5
ns
25
ns
50
ns
25
ns
15
ns
40
ns
15
ns
35
ns
50
ns 100 pF load
35
ns 100 pF load
35
ns 100 pF load
1
Rclk
200
ns 100 pF load
100
ns
8
24 Rclk
175
ns
40
ns
1
216-1 Rclk
Rev. P1.00
10
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