XR17C154_05 Datasheet, PDF (52/62 Pages) Exar Corporation – 5V PCI BUS QUAD UART

XR17C154
5V PCI BUS QUAD UART
AC ELECTRICAL CHARACTERISTICS FOR 5V SIGNALING
TA=0^o to 70^oC (-40^o to +85^oC for industrial grade package). VCC = 4.5 - 5.5V.
SYMBOL
PARAMETER
MIN
XTAL1
UART Crystal Oscillator
ECLK
External Clock
I_OH(AC)
Switching Current High
-44
I_OL(AC)
Switching Current Low
95
Slew_R
Output Rise Slew Rate
1
Slew_F
Output Fall Slew Rate
1
T_CYC
CLK Cycle Time
30
MAX
24
UNITS
MHz
50
MHz
mA
mA
4
V/ns
4
V/ns
∞
ns
T_HI
CLK High Time
11
T_LO
CLK Low Time
11
CLK Slew Rate
1
T_VAL
CLK to Signal Valid Delay
2
T_ON
Float to Active Delay
2
T_OFF
Active to Float Delay
T_SETUP
Input Setup Time to CLK -
7
bused signals
T_HOLD
Input Hold Time from CLK
0
ns
ns
4
V/ns
11
ns
ns
28
ns
ns
ns
xr
REV. 1.3.2
NOTES
0<Vout<1.4
Vout/0.023
0.2Vcc - 0.6Vccload
0.6Vcc - 0.2Vcc_load
PCI Bus Clock, CLK
(33.34 MHz max)
T_PRST
RST# Active Time After
1
Power Stable
T_CRST#
RST# Active Time After
100
CLK Stable
RST# Slew Rate
50
ms
us
mV/ns
52