xr16c2550ip Exar Corporation, xr16c2550ip Datasheet - Page 26

• Manufacturer Part Number: xr16c2550ip
• Description: Dual Uart With 16-byte Transmit And Receive Fifos
• Manufacturer: Exar Corporation

XR16C2550
2.97V TO 5.5V DUART WITH 16-BYTE FIFO
AC ELECTRICAL CHARACTERISTICS
TA=-40
S
T
T
T
T
OSC
T
T
T
YMBOL
T
CLK
T
T
T
T
T
Bclk
T
T
T
T
T
T
T
T
T
WDO
T
MOD
RDV
SSR
WRI
SRT
RST
RRI
WR
RSI
SSI
INT
WT
N
AS
AH
CS
RD
DY
DD
DS
DH
RR
-
SI
O
TO
Crystal Frequency
Clock Pulse Duration
External Clock Frequency
Address Setup Time
Address Hold Time
Chip Select Width
IOR# Strobe Width
Read or Write Cycle Delay
Data Access Time
Data Disable Time
IOW# Strobe Width
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 Start 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#
Reset Pulse Width
Baud Rate Divisor
Baud Clock
+85
O
C, V
CC
P
= 2.97V
ARAMETER
TO
5.5V, 70
P
F
LOAD WHERE APPLICABLE
M
70*
70*
70*
17
10
40
20
40
5
0
5
8
1
IN
26
L
3.3
IMITS
16X of data rate
2
M
16
20
30
35
25
50
40
40
45
45
24
45
45
45
1
1
8
AX
-1
M
40
40
40
25
15
40
8
0
5
0
5
8
1
IN
L
IMITS
5.0
2
M
16
24
64
25
15
40
35
35
40
40
24
40
40
40
1
1
8
AX
-1
U
MHz
Bclk
Bclk
Bclk
Bclk
Hz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NIT
-
xr
3.3V +10%/-5%
(See
* 55ns if VCC =
TA = 0 to 70
C
OMMENTS
Figure
and
REV. 1.0.1
12)
o
C