xr16m2751 Exar Corporation, xr16m2751 Datasheet - Page 42

• Manufacturer Part Number: xr16m2751
• Description: High Performance Duart With 64-byte Fifo And Powersave
• Manufacturer: Exar Corporation

XR16M2751
1.62V TO 3.63V HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
For PowerSave, the UART internally isolates all of these inputs (except the modem inputs) therefore
eliminating any unnecessary external buffers to keep the inputs steady.
PAGE 20.
AC ELECTRICAL CHARACTERISTICS
U
3.63V, 70
NLESS OTHERWISE NOTED
S
XTAL1
T
ECLK
T
T
T
T
T
T
T
T
T
T
T
YMBOL
T
T
T
T
T
T
T
T
T
T
T
T
ECLK
WDH
RWH
WDO
ADH
RWS
WDS
MOD
RDV
ADS
RDA
RDH
CSD
CSL
WR
AS
AH
CS
RD
DY
DD
DY
DS
DH
P
F
UART Crystal Oscillator
External Clock
External Clock Time Period
Address Setup Time (16 mode)
Address Hold Time (16 mode)
Chip Select Width (16 mode)
IOR# Strobe Width (16 mode)
Read Cycle Delay (16 mode)
Data Access Time (16 mode)
Data Disable Time (16 mode)
IOW# Strobe Width (16 mode)
Write Cycle Delay (16 mode)
Data Setup Time (16 mode)
Data Hold Time (16 mode)
Address Setup (68 Mode)
Address Hold (68 Mode)
R/W# Setup to CS# (68 Mode)
Read Data Access (68 mode)
Read Data Disable (68 mode)
Write Data Setup (68 mode)
Write Data Hold (68 Mode)
CS# De-asserted to R/W# De-asserted (68
Mode)
CS# Width (68 Mode)
CS# Cycle Delay (68 Mode)
Delay From IOW# To Output
Delay To Set Interrupt From MODEM Input
LOAD WHERE APPLICABLE
: TA=0
P
ARAMETER
O
TO
70
O
C (-40
O
TO
42
+85
M
1.8V ± 10%
IN
15
65
65
65
65
65
20
20
65
65
0
0
3
0
0
0
5
5
O
L
C
IMITS
FOR INDUSTRIAL GRADE PACKAGE
24
32
60
25
60
25
50
50
M
AX
M
SEE”POWERSAVE FEATURE” ON
2.5V ± 10%
IN
10
50
50
50
50
50
10
10
50
50
0
0
3
0
0
0
5
5
L
IMITS
M
24
50
45
25
45
25
50
50
AX
M
3.3V ± 10%
IN
40
40
40
40
40
10
10
40
40
7
0
0
3
0
0
0
5
5
L
IMITS
), V
24
64
35
25
35
25
50
50
M
AX
CC
REV. 1.0.0
=1.62 -
U
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NIT