xr17v254 Exar Corporation, xr17v254 Datasheet - Page 59

• Manufacturer Part Number: xr17v254
• Description: 66mhz Pci Bus Quad Uart With Power Management Support
• Manufacturer: Exar Corporation

REV. 1.0.0
AC ELECTRICAL CHARACTERISTICS FOR 3.3V SIGNALING
TA=-40
XTAL1
ECLK
I
I
I
I
I
I
Slew
Slew
T
T
T
T
T
T
T
T
T
T
T
T
T
T
OH(AC, min)
OH(AC, max)
OL(AC, min)
OL(AC, max)
CH
CL
cyc
on
off
su
su
high
low
val
h
rst
rst-clk#
rst-off
rhfa
rhff
S
YMBOL
(ptp)
R
F
O
TO
+85
UART Crystal Oscillator
Switching Current High, Min
Switching Current High, Max
Switching Current Low, Min
Switching Current Low, Max
High Clamp Current
Low Clamp Current
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 Setup Time to CLK -
point to point signals
Input Hold Time from CLK
RST# Active Time After
Power Stable
RST# Active Time After CLK
Stable
Reset Active to output float
delay
RST# HIGH to first Configu-
ration access
RST# HIGH to first FRAME#
assertion
RST# Slew Rate
External Clock
O
C (
INDUSTRIAL GRADE
P
ARAMETER
66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
) VCC = 3.0 - 3.6V
25+(Vin-VCC-1)/0.015
-25+(Vin+1)/0.015
-12VCC
16VCC
M
100
1.5
2
15
50
1
1
6
6
2
2
3
5
0
1
5
25
IN
59
-32VCC
38VCC
M
24
33
14
40
4
4
4
6
AX
mV/ns
clocks
clocks
U
MHz
MHz
V/ns
V/ns
V/ns
mA
mA
mA
mA
mA
mA
ms
NITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
us
ns
VCC+4 > Vin ≥ VCC+1
PCI bus Clock, CLK
0.3VCC to 0.6VCC
0.6VCC to 0.3VCC
Bused and point to
up to 66.67MHz
V
V
V
V
out
On-chip osc.
point signals
-3 < Vin ≤ -1
out
out
out
XR17V254
N
= 0.18VCC
= 0.3VCC
= 0.7VCC
= 0.6VCC
OTES