XR17D154 Exar Corporation, XR17D154 Datasheet - Page 52

• Manufacturer Part Number: XR17D154
• Description: Four-channel Pci-bus Uart
• Manufacturer: Exar Corporation

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PRELIMINARY
AC ELECTRICAL CHARACTERISTICS FOR 3.3V SIGNALING
TA=0
CLK
XTAL1
I
I
Slew
Slew
T
T
T
T
T
T
T
T
T
T
OH(AC)
OL(AC)
CYC
HI
LO
VAL
ON
OFF
SETUP
HOLD
PRST
CRST#
S
YMBOL
o
R
F
to 70
o
C (-40
PCI Bus Clock
UART Crystal Oscillator
UART External Clock
Switching Current High
Switching Current Low
Output Rise Slew Rate
Output Fall Slew Rate
CLK Cycle Time
CLK High Time
CLK Low Time
CLK Slew Rate
CLK to Signal Valid Delay
Float to Active Delay
Active to Float Delay
Input Setup Time to CLK -
bused signals
Input Hold Time from CLK
RST# Active Time After
Power Stable
RST# Active Time After CLK
Stable
RST# Slew Rate
o
to +85
P
ARAMETER
o
C for industrial grade package), Vcc = 3.3V ± 10% unless otherwise specified.
M
100
-20
70
50
18
18
15
50
1
1
1
2
2
0
1
IN
52
UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART
M
22
20
33
20
28
4
4
4
AX
mV/ns
U
MHz
MHz
V/ns
V/ns
V/ns
mA
mA
ms
NITS
ns
ns
ns
ns
ns
ns
ns
ns
us
0.2Vcc - 0.6Vcc load
0.6Vcc - 0.2Vcc load
Vcc > Vout
0 < Vout
On-chip osc.
N
OTES
XR17D154
REV. P1.0.0
0.3Vcc
0.6Vcc