xr16l2751im Exar Corporation, xr16l2751im Datasheet - Page 41

• Manufacturer Part Number: xr16l2751im
• Description: 2.25v To 5.5v Duart With 64-byte Fifo And Powersave
• Manufacturer: Exar Corporation

xr
REV. 1.2.2
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
70
S
NLESS OTHERWISE NOTED
T
T
T
T
T
YMBOL
T
T
T
T
T
OSC
T
P
CLK
T
T
T
T
T
T
T
T
T
T
RWS
WDS
WDH
RWH
ADS
ADH
RDH
RDV
RDA
CSD
CSL
F
WR
AH
RD
DD
DH
AS
CS
DY
DY
DS
-
LOAD WHERE APPLICABLE
Crystal Frequency
External Clock Low/High Time
External Clock Frequency
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)
: TA=0
P
ARAMETER
O
TO
70
O
C (-40
2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE
O
TO
+85
41
O
M
C
150
150
150
150
150
150
150
20
10
10
25
15
10
10
10
25
15
15
IN
0
FOR INDUSTRIAL GRADE PACKAGE
L
IMITS
2.5
135
135
M
16
24
45
45
AX
M
SEE”POWERSAVE FEATURE” ON
15
10
10
75
75
75
75
75
20
10
10
10
10
20
10
10
75
75
IN
0
L
IMITS
3.3
M
20
33
70
30
70
30
AX
M
IN
10
10
10
50
50
50
50
50
15
10
10
10
10
15
10
10
50
50
0
), V
L
IMITS
5.0
CC
XR16L2751
=2.25 - 5.5V,
24
50
45
30
45
30
M
AX
MHz
MHz
U
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NIT