xr16v554 Exar Corporation, xr16v554 Datasheet - Page 31

• Manufacturer Part Number: xr16v554
• Description: 2.25v To 3.6v Quad Uart With 16-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.2
AC ELECTRICAL CHARACTERISTICS
TA = -40
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
T
ECLK
WDH
RWH
WDO
ADH
RWS
WDS
MOD
RDV
ADS
RDA
RDH
CSD
CSL
WR
RSI
AS
AH
CS
RD
DY
DD
DY
DS
DH
O
TO
UART Crystal Frequency
External Clock Frequency
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)
Data Access Time (68 mode)
Data Disable Time (68 mode)
Write Data Setup (68 mode)
Write Data Hold (68 Mode)
CS# De-asserted to R/W# De-asserted (68 Mode)
CS# Strobe Width (68 Mode)
CS# Cycle Delay (68 Mode)
Delay From IOW# To Output
Delay To Set Interrupt From MODEM Input
Delay To Reset Interrupt From IOR#
+85
O
C, V
CC IS
2.25
P
TO
ARAMETER
3.6V, 70
P
F
LOAD WHERE APPLICABLE
31
2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO
10
50
50
50
50
50
10
10
10
50
50
2.5V ± 10%
M
0
0
5
0
0
0
5
IN
L
IMITS
M
AX
24
50
45
10
45
10
50
50
50
XR16V554/554D
40
40
40
40
40
10
10
40
40
3.3V ± 10%
M
7
0
0
5
0
0
0
5
5
IN
L
IMITS
M
AX
24
64
35
10
35
10
50
50
50
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
ns
NIT