xr16c2850im Exar Corporation, xr16c2850im Datasheet - Page 40

• Manufacturer Part Number: xr16c2850im
• Description: Dual Uart With Tx And Rx Fifo Counters, 128 Bytes Of Fifos And Automatic Rs-485 Half Duplex Control
• Manufacturer: Exar Corporation

XR16C2850
2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS
AC ELECTRICAL CHARACTERISTICS
TA=0
WHERE APPLICABLE
S
TWDO
TMOD
TRDV
TSSR
TWRI
TSRT
TRRI
YMBOL
TWR
TRSI
TSSI
TINT
OSC
OSC
TWT
CLK
TCS
TRD
TDY
TDD
TDY
TDS
TDH
TRR
TAS
TAH
TAH
TSI
O
TO
70
Clock Pulse Duration
Oscillator Frequency
External Clock Frequency
Address Setup Time
Address Hold Time
(top mark date code of "DC YYWW" and older)
Address Hold Time
(top mark date code of "F2 YYWW" and newer)
Chip Select Width
IOR# Strobe Width
Read Cycle Delay
Data Access Time
Data Disable Time
IOW# Strobe Width
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 Center of Start To Reset TXRDY#
O
C (-40
O
TO
+85
P
ARAMETER
O
C
FOR INDUSTRIAL GRADE PACKAGE
40
M
30
10
66
35
40
40
40
20
IN
5
0
0
5
8
L
IMITS
3.3
M
33
35
25
50
40
40
45
45
24
45
45
45
8
1
1
8
AX
), V
M
IN
20
50
25
30
25
30
15
CC IS
0
5
0
0
5
8
L
IMITS
5.0
2.90V
24
50
25
15
40
35
35
40
40
24
40
40
40
M
1
1
8
AX
TO
MHz
MHz
U
Bclk
Bclk
Bclk
Bclk
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5.5V, 70
NIT
xr
100 pF load
100 pF load
100 pF load
100 pF load
C
ONDITIONS
REV. 2.1.3
P
F L
OAD