R
XC1800 Series of In-System Programmable Configuration PROMs
AC Characteristics Over Operating Condition When Cascading
RESET/OE
CE
CLK
T
12
CDF
Last Bit
First Bit
DATA
CEO
T
13
T
OOE
OCK
15
T
T
OCE
14
14
OCE
99020800
Symbol
TCDF
Description
Min
Max
Units
12
13
14
15
CLK to Data Float Delay2, 3
CLK to CEO Delay3
50
30
35
30
ns
ns
ns
ns
TOCK
TOCE
CE to CEO Delay3
TOOE
RESET/OE to CEO Delay3
Notes: 1. AC test load = 50 pF
2. Float delays are measured with 5 pF AC loads. Transition is measured at +/- 200mV from steady state active levels.
3. Characterized but not 100% tested.
4. All AC parameters are measured with VIL = 0.0 V and VIH = 3.0 V.
September 17, 1999 (Version 1.3)
15
XILINX [ XILINX, INC ]
