R
XC1800 Series of In-System Programmable Configuration PROMs
.AC Characteristics Over Operating Conditions
CE
9
10
9
T
T
T
HCE
SCE
SCE
RESET/OE
CLK
T
11
HOE
T
8
LC
7
T
HC
6
T
CYC
3
4
T
OE
1
5
T
DF
T
T
CAC
OH
T
2
CE
DATA
4
T
OH
99020801
Symbol
Description
Min
Max
30
45
Units
1
2
3
4
5
6
7
8
TOE
TCE
TCAC
TOH
TDF
TCYC
TLC
THC
TSCE
THCE
THOE
OE to Data Delay
CE to Data Delay
CLK to Data Delay
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
45
Data Hold From CE, OE, or CLK
CE or OE to Data Float Delay2
Clock Periods
0
50
67
25
25
25
0
CLK Low Time3
CLK High Time3
9
10
11
CE Setup Time to CLK (to guarantee proper counting)
CE Hold Time to CLK (to guarantee proper counting)
OE Hold Time (guarantees counters are reset)
25
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. Guaranteed by design, not tested.
4. All AC parameters are measured with VIL = 0.0 V and VIH = 3.0 V.
14
September 17, 1999 (Version 1.3)
XILINX [ XILINX, INC ]
